Analog-Devices-Inc–Maxim-Integrated-MAX7400EPA-
| Part # | Analog-Devices-Inc–Maxim-Integrated-MAX7400EPA- |
Download  | Analog-Devices-Inc–Maxim-Integrated-MAX7400EPA- |
19-4764; Rev 2; 6/99
8 t h –
O
rd e r,
Lo w p a s s ,
Ellip t ic ,
S w it c h e d -Ca p a c it o r
Filt e rs
3/MAX407
Ge n e ra l
De s c rip t io n
Fe a t u re s
T
h
e
M
AX
7
400/
M
AX
7
403/
M
AX
7
404/
M
AX
7
407 8th-order,
l
o
wpass, e
l
li
p
t
i
c
, s
w
it
c
hed
–
c
apac
i
tor filt
e
r
s (SCFs) oper-
a
t
e from a
s
i
n
g
l
e
+
5V
(
M
AX
7
400/
M
AX
7
403) or +3V
(MAX
7
404/
M
AX
7
407) supp
l
y. T
h
ese de
v
i
c
es d
r
a
w 2mA
of supp
l
y
c
urrent and a
l
l
o
w corner
f
r
e
quenc
i
e
s
f
rom
1Hz to 10kHz, mak
i
n
g them
i
d
eal
f
o
r
l
o
w-
p
ower ant
i
–
a
l
i
a
s
i
n
g and post-D
A
C filt
e
r
ing
a
pp
l
i
c
a
t
ion
s
.
T
h
ey
f
e
a-
ture a
s
hutdown mode that reduces the supp
l
y
c
urrent
to 0.2µA.
♦
8th-Order Lowpass Elliptic Filter
♦
Low Noise and Distortion
-82dB THD + Noise (MAX7400)
♦
Clock-Tunable Corner Frequency (1Hz to 10kHz)
♦
100:1 Clock-to-Corner Ratio
♦
Single-Supply Operation
+5V (MAX7400/MAX7403)
+3V (MAX7404/MAX7407)
Two c
l
o
c king
op tions
a re
a va ila b le :
s e lf-c loc king
(through the use of an external capac
i
tor) or
e
x
t
e
r
nal
c
l
o
ck
i
n
g
f
o
r ti
g
hter cuto
f
f-fr
e
quency contro
l
. In
a
dd
i
ti
o
n,
an o
f
f
s
et ad
j
u
stment p
i
n (OS)
a
l
l
o
ws for the
a
d
j
u
stment
of the
DC output
l
e
v
e
l
.
♦
Low Power
2mA (Operating Mode)
0.2µA (Shutdown Mode)
♦
Available in 8-Pin SO and DIP Packages
♦
Low Output Offset: ±5mV
T
h
e
M
AX
7
400/
M
AX
7
404 prov
i
d
e 82dB of stopband
r
e
j
e
c
t
ion
a
nd a sharp ro
l
l
o
f
f
with a tr
a
ns
i
ti
o
n rat
i
o
o
f 1.5.
T
h
e
M
AX
7
403/
M
AX
7
407 prov
i
d
e a sha
r
p
er
r
olloff with a
tr
a
ns
i
ti
o
n rat
i
o
o
f 1.2, wh
i
le
s
t
ill
d
e
l
iv
e
r
ing 60dB of stop-
band
r
e
j
e
c
t
ion. The fix
e
d
r
e
sponse of these dev
i
c
es
s
i
m
p
l
ifi
e
s
t
he des
i
g
n
t
a
sk
t
o
c
orner-
f
r
e
quency se
l
e
c
t
ion
Ord e rin g
In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
PIN-PACKAGE
8 SO
MAX7400
CSA
MAX
7
400CPA
MAX
7
400ESA
MAX
7
400EPA
b y
s e tting
a c
l
o
c k
f
re q ue nc y.
The MA
X
7
400/
0°C to +70°C
8 P
l
a
s
t
ic DIP
8 SO
MAX
7
403/
M
AX
7
404/
M
AX
7
407 are ava
i
l
a
b
l
e in
8
-p
i
n
S
O
and D
I
P
p
ac
k
a
ges.
-40°C to +85°C
-40°C to +85°C
8 P
l
a
s
t
ic DIP
Ap p lic a t io n s
Ordering Information continued at end of data sheet.
ADC A
n
ti-Ali
a
s
i
n
g
Post-D
A
C Filt
e
r
ing
C
T
2 B
a
se S
t
a
t
ions
Speech P
r
ocess
i
n
g
S e le c t o r
Gu id e
Air-B
a
g
E
l
e
c
t
roni
c
s
OPERATING
VOLTAGE (V)
PART
FILTER RESPONSE
MAX
7
400
MAX
7
403
MAX
7
404
MAX
7
407
Elli
p
t
ic (r = 1.5)
Elli
p
t
ic (r = 1.2)
Elli
p
t
ic (r = 1.5)
Elli
p
t
ic (r = 1.2)
+5
+5
+3
+3
T
y
p ic a l
Op e ra t in g
Circ u it
V
S
U
P
P
L
Y
P in
Co n fig u ra t io n
0.1
µ
F
V
DD
S
H
DN
OUT
TOP VIEW
INPUT
IN
OUT
P
U
T
COM
IN
1
2
3
4
8
7
6
5
CLK
S
H
DN
OS
MAX
7
400
MAX
7
403
MAX
7
404
MAX
7
407
MAX
7
400
MAX
7
403
MAX
7
404
MAX
7
407
CLOCK
CLK
COM
OS
GND
0.1
µ
F
V
DD
OUT
GND
SO/DIP
________________________________________________________________
Maxim Integrated Products
1
For small orders, phone 1-800-835-8769.
8 t h –
O
rd e r,
Lo w p a s s ,
Ellip t ic ,
S w it c h e d -Ca p a c it o r
Filt e rs
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND
Cont
i
n
uous Power D
i
s
s
i
p
a
t
ion (T
=
+
70°C)
A
MAX
7
400/
M
AX
7
403 ……………………………………….-0.3V to +6V
MAX
7
404/
M
AX
7
407 ……………………………………….-0.3V to +4V
SO (derate 5.88m
W
/°C
a
bo
v
e
+
70°C)……………………..471mW
DIP (
d
e
r
a
t
e 9.1m
W
/°C
a
bo
v
e
+
70°C)
………………………727mW
Ope
r
a
t
ing T
e
mpe
r
a
t
ure R
a
nges
IN, OUT, COM, OS, CLK
……………………….-0.3V to
(V +
0.3
V
)
DD
SHDN
………………………………………………………………-0.3V to
+6V
OUT Short-Cir
c
u
i
t Dur
a
t
io
n
.
…………………………………………..1sec
MAX
7
40_C_A ……………………………………………..0°C to +70°C
MAX
7
40_E_A …………………………………………..-40°C to +85°C
Storage
T
e
mpe
r
a
t
ure R
a
nge ………………………..-65°C to +150°C
L
e
ad
T
e
mpe
r
a
t
ure (
s
o
l
d
e
r
in
g
, 10sec)
………………………..+300°C
Str
e
sses be
y
ond those
l
i
s
t
e
d under
“
A
b
so
l
u
te M
a
x
imum R
a
t
in
g
s” may cause pe
r
manent damage to the dev
i
c
e.
T
h
ese a
r
e
s
t
r
e
ss
r
a
t
in
g
s on
l
y,
a
nd
f
u
nct
i
o
nal
ope
r
a
t
ion of the
d
e
v
i
c
e at
t
hese or any other cond
i
ti
o
ns beyond those
i
n
d
i
c
a
t
e
d
i
n the o
p
e
r
a
t
ion
a
l sec
t
ions of the spec
i
fi
c
a
t
ions is not im
p
l
i
e
d.
E
x
p
osure to
abso
l
u
te max
i
m
um rat
i
n
g cond
i
ti
o
ns
f
o
r extended per
i
o
ds may a
f
f
e
ct de
v
i
c
e
r
e
l
i
a
b
i
lity.
ELECTRICAL CHARACTERISTICS—MAX7400/MAX7403
(V =
+
5
V
, filt
e
r output measured at OU
T
,
1
0k
Ω
|| 50pF
l
o
ad to GND at OU
T
,
SHDN
= V
, OS = CO
M
,
0
.1µF from COM to GND,
DD
DD
f
= 100kHz, T
= T
to T
, un
l
e
ss o
t
herwi
s
e noted.
T
y
p
i
c
al
v
a
l
u
es a
r
e
a
t +25°C.)
MAX
C
L
K
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
FILTER CHARACTERISTICS
Corner Frequency
f
(Note 1)
0.001 to 10
100:1
kHz
C
C
l
o
ck-to-Corner Rat
i
o
C
l
o
ck-to-Corner
T
e
mpco
Output
V
o
l
t
a
ge
R
a
nge
Output O
f
f
s
et
V
o
l
t
a
ge
f
/f
C
L
K C
10
ppm
/
°C
V
0.25
-0.1
V
DD
– 0.25
±25
V
V
IN
= V
= V
/ 2
±5
mV
OFFSET
COM
DD
DC In
s
e
r
tion G
a
i
n with
Output O
f
f
s
et
R
e
moved
V
COM
= V
/ 2 (Note 2)
0.15
0.3
dB
dB
DD
MAX
7
400
MAX
7
403
-82
-80
1
T
o
tal Harmon
i
c
Di
s
t
ortion
p
l
u
s No
i
s
e
f
IN
= 200Hz, V
= 4
V
p
–
p
,
IN
THD
+
N
measurement bandw
i
d
t
h = 22kHz
OS
V
o
l
t
a
ge Ga
i
n to OUT
I
n
put
V
o
l
t
a
ge
R
a
nge at OS
A
OS
V
/
V
V
V
OS
V
COM
±0.1
V
– 0.5
/ 2
V
+ 0.5
/ 2
DD
DD
I
n
put, COM externa
l
ly
d
r
iv
e
n
Output, COM
i
n
terna
l
ly
b
i
a
sed
V
/ 2
DD
COM
V
o
l
t
a
ge
R
a
nge
V
COM
V
V
/ 2
V
/ 2
DD
DD
V
DD
/ 2
– 0.2
+ 0.2
I
n
put Res
i
s
t
a
nce at COM
C
l
o
ck Feedthrough
R
75
125
10
1
k
Ω
m
V
p
–
p
k
Ω
COM
3/MAX407
R
e
s
i
s
t
ive Out
p
ut
L
o
ad Dr
i
ve
R
C
10
50
L
L
M
a
x
imum Capac
i
tive Lo
a
d
at OUT
500
pF
I
n
put
L
e
a
k
a
ge Current at COM
I
n
put
L
e
a
k
a
ge Current at OS
CLOCK
±0.1
±0.1
±10
±10
µA
µA
SHDN
= GND, V
= 0 to V
DD
COM
V
= 0 to (V
– 1
V
)
(
Note 3)
DD
OS
I
n
ternal Osc
i
ll
a
t
or Fr
e
quency
C
l
o
ck
I
n
put Current
C
l
o
ck
I
n
put H
i
g
h
f
C
= 1000pF (Note 4)
= 0 or 5V
C
L
K
29
38
48
kHz
µA
V
OSC
OSC
I
V
±15
±30
C
L
K
V
V
– 0.5
IH
DD
C
l
o
ck
I
n
put
L
o
w
V
IL
0.5
V
2
_______________________________________________________________________________________
8 t h –
O
rd e r,
Lo w p a s s ,
Ellip t ic ,
S w it c h e d -Ca p a c it o r
Filt e rs
3/MAX407
ELECTRICAL CHARACTERISTICS—MAX7400/MAX7403 (continued)
(V =
+
5
V
, filt
e
r output measured at OU
T
,
1
0k
Ω
|| 50pF
l
o
ad to GND at OU
T
,
SHDN
= V
, OS = CO
M
,
0
.1µF from COM to GND,
DD
DD
f
= 100kHz, T
= T
to T
, un
l
e
ss o
t
herwi
s
e noted.
T
y
p
i
c
al
v
a
l
u
es a
r
e
a
t T
= +25°C.)
MAX
A
C
L
K
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER REQUIREMENTS
Supp
l
y V
o
l
t
a
ge
V
4.5
5.5
3.5
1
V
DD
Supp
l
y
C
urrent
I
DD
Ope
r
a
t
ing mode, no
l
o
ad,
I
N =
O
S = COM
2
mA
µA
dB
Shutdown Current
I
0.2
60
SHDN
= GND, CLK
d
r
iv
e
n
f
rom 0 to V
SHDN
DD
Power-Supp
l
y R
e
j
e
c
t
ion R
a
t
io
SHUTDOWN
PSRR
M
e
asu
r
e
d at
D
C
V
V
DD
– 0.5
V
V
SHDN
I
n
put H
i
g
h
SDH
V
SDL
0.5
SHDN
I
n
put
L
o
w
V
SHDN
= 0 to V
±0.1
±10
µA
SHDN
I
n
put
L
e
a
k
a
ge Current
DD
ELECTRICAL CHARACTERISTICS—MAX7404/MAX7407
(V =
+
3
V
, filt
e
r output measured at OU
T
,
1
0k
Ω
|| 50pF
l
o
ad to GND at OU
T
,
SHDN
= V
, OS = CO
M
,
0
.1µF from COM to GND,
DD
DD
f
= 100kHz, T
= T
to T
, un
l
e
ss o
t
herwi
s
e noted.
T
y
p
i
c
al
v
a
l
u
es a
r
e
a
t T
= +25°C.)
C
L
K
A
MIN
MAX
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
FILTER CHARACTERISTICS
Corner Frequency
f
(Note 1)
0.001 to 10
100:1
kHz
C
C
l
o
ck-to-Corner Rat
i
o
C
l
o
ck-to-Corner
T
e
mpco
Output
V
o
l
t
a
ge
R
a
nge
Output O
f
f
s
et
V
o
l
t
a
ge
f
/f
C
L
K C
10
ppm
/
°C
V
0.25
-0.1
V
DD
– 0.25
±25
V
V
IN
= V
= V
/ 2
±5
mV
OFFSET
COM
DD
DC In
s
e
r
tion G
a
i
n with Out
p
ut
O
f
f
s
et
R
e
moved
V
COM
= V
/ 2 (Note 2)
0.1
0.3
dB
dB
DD
MAX
7
404
MAX
7
407
-79
-77
1
T
o
tal Harmon
i
c
Di
s
t
ortion
p
l
u
s No
i
s
e
f
IN
= 200Hz, V
= 2.5
V
p
–
p
,
IN
THD
+
N
measurement bandw
i
d
t
h = 22kHz
OS
V
o
l
t
a
ge Ga
i
n to OUT
I
n
put
V
o
l
t
a
ge
R
a
nge at OS
A
OS
V
/
V
V
V
OS
V
COM
±0.1
V
– 0.1
/ 2
V
+ 0.1
/ 2
DD
DD
COM
V
o
l
t
a
ge
R
a
nge
V
COM
COM
i
n
terna
l
ly
b
i
a
sed or e
x
t
e
r
na
l
ly
d
r
iv
e
n
V
V
DD
/ 2
I
n
put Res
i
s
t
a
nce at COM
C
l
o
ck Feedthrough
R
75
125
10
1
k
Ω
m
V
p
–
p
k
Ω
COM
R
e
s
i
s
t
ive Out
p
ut
L
o
ad Dr
i
ve
R
C
10
50
L
L
M
a
x
imum Capac
i
tive Lo
a
d
at OUT
500
pF
I
n
put
L
e
a
k
a
ge Current at COM
I
n
put
L
e
a
k
a
ge Current at OS
±0.1
±0.1
±10
±10
µA
µA
SHDN
= GND, V
= 0 to V
DD
COM
V
= 0 to (V
– 1
V
)
(
Note 3)
DD
OS
_______________________________________________________________________________________
3
8 t h –
O
rd e r,
Lo w p a s s ,
Ellip t ic ,
S w it c h e d -Ca p a c it o r
Filt e rs
ELECTRICAL CHARACTERISTICS—MAX7404/MAX7407 (continued)
(V =
+
3
V
, filt
e
r output measured at OU
T
,
1
0k
Ω
|| 50pF
l
o
ad to GND at OU
T
,
SHDN
= V
, OS = CO
M
,
0
.1µF from COM to GND,
DD
DD
f
= 100kHz, T
= T
to T
, un
l
e
ss o
t
herwi
s
e noted.
T
y
p
i
c
al
v
a
l
u
es a
r
e
a
t T
= +25°C.)
MAX
A
C
L
K
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CLOCK
I
n
ternal Osc
i
ll
a
t
or Fr
e
quency
C
l
o
ck
I
n
put Current
C
l
o
ck
I
n
put H
i
g
h
f
C
= 1000pF (Note 4)
OSC
26
34
43
kHz
µA
V
OSC
I
V
C
L
K
= 0 or 3V
±15
±30
C
L
K
V
V
– 0.5
IH
DD
C
l
o
ck
I
n
put
L
o
w
V
IL
0.5
V
POWER REQUIREMENTS
Supp
l
y V
o
l
t
a
ge
V
2.7
3.6
3.5
1
V
DD
Supp
l
y
C
urrent
I
DD
Ope
r
a
t
ing mode, no
l
o
ad,
I
N =
O
S = COM
2
mA
µA
dB
Shutdown Current
I
0.2
60
SHDN
= GND, CLK
d
r
iv
e
n
f
rom 0 to V
SHDN
DD
Power-Supp
l
y R
e
j
e
c
t
ion R
a
t
io
SHUTDOWN
PSRR
M
e
asu
r
e
d at
D
C
V
V
DD
– 0.5
V
V
SHDN
I
n
put H
i
g
h
SDH
V
SDL
0.5
SHDN
I
n
put
L
o
w
V
= 0 to V
±0.1
±10
µA
SHDN
I
n
put
L
e
a
k
a
ge Current
S
H
DN
DD
ELLIPTIC (r = 1.5) FILTER CHARACTERISTICS—MAX7400/MAX7404
(V =
+
5V
f
o
r
M
AX
7
400, V
= +3V
f
o
r
M
AX
7
404;
f
ilt
e
r output measured at OU
T
;
1
0k
Ω
||
50pF
l
o
ad to GND at OU
T
;
SHDN
= V
;
DD
DD
DD
V
COM
= V
= V
/ 2; f
= 100kHz; T
= T
to T
; un
l
e
ss o
t
herwi
s
e noted.
T
y
p
i
c
al
v
a
l
u
es a
r
e
a
t T
= +25°C.)
MAX
A
OS
DD
C
L
K
A
MIN
PARAMETER
CONDITIONS
MIN
-0.20
-0.20
-0.20
-0.20
-0.20
-0.20
-0.20
TYP
MAX
0.20
0.20
0.20
0.20
0.20
0.25
0.25
-75
UNITS
f
= 0.371f
-0.10
0.02
-0.08
0.06
-0.03
0.09
0.02
-82
IN
C
f
IN
= 0.587f
C
f
IN
= 0.737f
C
f
IN
= 0.868f
C
f
IN
= 0.940f
C
I
n
se
r
tion G
a
i
n R
e
l
a
t
ive to DC G
a
i
n
(Note 5)
dB
f
IN
= 0.988f
C
3/MAX407
f
IN
= 1.000f
C
f
IN
= 1.500f
C
f
IN
= 1.601f
-84
-78
C
f
IN
= 2.020f
-83
-78
C
f
IN
= 4.020f
-85
-78
C
4
_______________________________________________________________________________________
8 t h –
O
rd e r,
Lo w p a s s ,
Ellip t ic ,
S w it c h e d -Ca p a c it o r
Filt e rs
3/MAX407
ELLIPTIC (r = 1.2) FILTER CHARACTERISTICS—MAX7403/MAX7407
(V =
+
5V
f
o
r
M
AX
7
403, V
= +3V
f
o
r
M
AX
7
407;
f
ilt
e
r output measured at OU
T
;
1
0k
Ω
||
50pF
l
o
ad to GND at OU
T
;
SHDN
= V
;
DD
DD
DD
V
COM
= V
= V
/ 2; f
= 100kHz; T
= T
to T
; un
l
e
ss o
t
herwi
s
e noted.
T
y
p
i
c
al
v
a
l
u
es a
r
e
a
t T
= +25°C.)
MAX
A
OS
DD
C
L
K
A
MIN
PARAMETER
CONDITIONS
MIN
-0.20
-0.20
-0.20
-0.20
-0.20
-0.20
-0.20
TYP
MAX
0.20
0.20
0.20
0.20
0.20
0.30
0.30
-50
UNITS
f
= 0.408f
-0.11
0.02
-0.06
0.10
0.02
0.14
0.09
-58
IN
C
f
IN
= 0.640f
C
f
IN
= 0.784f
C
f
IN
= 0.902f
C
f
IN
= 0.956f
C
I
n
se
r
tion G
a
i
n R
e
l
a
t
ive to DC G
a
i
n
(Note 5)
dB
f
IN
= 0.992f
C
f
IN
= 1.000f
C
f
IN
= 1.200f
C
f
IN
= 1.261f
-59
-54
C
f
IN
= 1.533f
-60
-54
C
f
IN
= 2.875f
-60
-54
C
Note 1:
T
h
e max
i
m
um f
i
s
d
e
f
i
n
ed as
t
he c
l
o
ck
f
r
e
quenc
y
, f
= 100
·
f ,
a
t
w
hi
c
h
t
he peak S
I
NAD
d
r
ops to 68dB w
i
th a
C
C
C
L
K
s
i
n
uso
i
d
al
i
n
put at 0.2f
.
C
Note 2:
DC in
s
e
r
tion
g
a
i
n is
d
e
f
i
n
ed as
∆
V
/
∆
V .
IN
OUT
Note 3:
OS vo
l
t
a
ges abo
v
e V
– 1V saturate
the
i
n
put and resu
l
t in a
7
5µA ty
p
i
c
al
i
n
put
l
e
a
k
a
ge cu
r
r
e
nt.
DD
3
3
Note 4:
For MA
X
7
400/
M
AX
7
403, f
(kHz) 38
·
10 /
C
(
p
F
). For MA
X
7
404/
M
AX
7
407, f
(kHz) 34
·
10 /
C
(
p
F
).
OSC
OSC
OSC
OSC
Note 5:
T
h
e
i
n
put
f
r
e
quenc
i
e
s, f
, a
r
e
s
e
l
e
c
t
e
d at
t
he peaks and troughs of the
f
r
e
quency
r
e
sponses.
IN
T
y
p ic a l
Op e ra t in g
Ch a ra c t e ris t ic s
(V
DD
=
+
5V
f
o
r
M
AX
7
400/
M
AX
7
403, V
=
+
3V
f
o
r
M
AX
7
404/
M
AX
7
407; V
= V
= V
/ 2;
SHDN
= V
; f
= 100kHz;
DD
COM
OS
DD
DD CLK
T
A
=
+
25°C; un
l
e
ss o
t
herwi
s
e noted.)
MAX
7
400/
M
AX
7
404 (r = 1
.
5)
FREQUENCY RES
P
O
N
S
E
MAX
7
400/
M
AX
7
404 (r = 1
.
5)
P
A
S
SB
A
ND
F
REQUENCY RES
P
O
N
S
E
MAX
7
400/
M
AX
7
404 (r = 1
.
5)
P
H
A
S
E RESP
O
N
S
E
20
0.24
0.20
0.16
0.12
0.08
0.04
0
0
f =
1kHz
C
f =
1kHz
C
f =
1kHz
C
-80
0
-20
-160
-240
-320
-400
-40
-60
-80
-480
-560
-640
-100
-120
-0.04
-0.08
0
1
2
3
4
5
0
202
404
606
808
1010
0
300
600
900
1200
1500
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (Hz)
INPUT FREQUENCY (Hz)
_______________________________________________________________________________________
5
8 t h –
O
rd e r,
Lo w p a s s ,
Ellip t ic ,
S w it c h e d -Ca p a c it o r
Filt e rs
T
y
p ic a l
Op e ra t in g
Ch a ra c t e ris t ic s
(c o n t in u e d )
(V
DD
=
+
5V
f
o
r
M
AX
7
400/
M
AX
7
403, V
=
+
3V
f
o
r
M
AX
7
404/
M
AX
7
407; V
= V
= V
/ 2;
SHDN
= V
; f
= 100kHz;
DD
COM
OS
DD
DD CLK
T
A
=
+
25°C; un
l
e
ss o
t
herwi
s
e noted.)
MAX
7
403/
M
AX
7
407 (r = 1
.
2)
FREQUENCY RES
P
O
N
S
E
MAX
7
403/
M
AX
7
407 (r = 1
.
2)
P
A
S
SB
A
ND
F
REQUENCY RES
P
O
N
S
E
MAX
7
403/
M
AX
7
407 (r = 1
.
2)
P
H
A
S
E RESP
O
N
S
E
40
0.32
0.24
0.16
0.08
0
0
-80
f =
1kHz
C
f =
1kHz
C
f =
1kHz
C
20
0
-160
-240
-320
-400
-480
-560
-640
-20
-40
-60
-80
-100
-120
-0.08
-0.16
-0.24
-0.32
0
1
2
3
4
5
0
202
404
606
808
1010
0
240
480
720
960
1200
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (Hz)
INPUT FREQUENCY (Hz)
O
F
FSET
V
OLTAGE
v
s
.
S
U
P
P
L
Y
VOLTAGE
S
U
P
P
L
Y CURRENT
v
s
.
S
U
P
P
L
Y
VOLTAGE
S
U
P
P
L
Y CURRENT
v
s
.
T
EM
P
E
RATURE
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
20
15
10
5
2.03
2.02
2.01
2.00
1.99
1.98
1.97
NO LOAD
V
= V
= V
/2
IN COM DD
NO LOAD
MAX
7
400
MAX
7
403
MAX
7
400
MAX
7
403
MAX
7
404
MAX
7
407
MAX
7
400
MAX
7
403
MAX
7
404
MAX
7
407
0
-5
-10
-15
-20
MAX
7
404
MAX
7
407
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-40 -20
0
20
40
60
80 100
S
U
P
P
L
Y VOLTAGE
(
V
)
S
U
P
P
L
Y VOLTAGE
(
V
)
TEM
P
E
RATURE
(
°C)
3/MAX407
THD
P
L
US NO
I
SE v
s
.
I
N
P
U
T
S
I
G
NAL
AM
P
L
I
TUDE AND RESISTIVE LOAD (MAX
7
400)
THD
P
L
US NO
I
SE v
s
.
I
N
P
U
T
S
I
G
NAL
AM
P
L
I
TUDE (MAX
7
400)
O
F
FSET
V
OLTAGE
v
s
.
T
EM
P
E
RATURE
0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
2.0
1.5
1.0
0.5
0
f
= 200
H
z
IN
V
= V
= V
/2
IN COM DD
NO LOAD
(S
E
E TABLE A)
-10
-20
-30
-40
-50
-60
-70
-80
-90
f =
1kHz
C
MEA
S
U
REMENT BW =
2
2k
H
z
R =
500
Ω
L
R =
1k
Ω
L
B
C
D
R =
10k
Ω
L
-0.5
0
1
2
3
4
5
0
1
2
3
4
5
-40 -20
0
20
40
60
80 100
AM
P
L
ITUDE
(
V
p
-p)
AM
P
L
ITUDE
(
V
p
-p)
TEM
P
E
RATURE
(
°C)
6
_______________________________________________________________________________________
8 t h –
O
rd e r,
Lo w p a s s ,
Ellip t ic ,
S w it c h e d -Ca p a c it o r
Filt e rs
3/MAX407
T
y
p ic a l
Op e ra t in g
Ch a ra c t e ris t ic s
(c o n t in u e d )
(V
DD
=
+
5V
f
o
r
M
AX
7
400/
M
AX
7
403, V
=
+
3V
f
o
r
M
AX
7
404/
M
AX
7
407; V
= V
= V
/ 2;
SHDN
= V
; f
= 100kHz;
DD
COM
OS
DD
DD CLK
T
A
=
+
25°C; un
l
e
ss o
t
herwi
s
e noted.)
THD
P
L
US NO
I
SE v
s
.
I
N
P
U
T
S
I
G
NAL
AM
P
L
I
TUDE AND RESISTIVE LOAD (MAX
7
403)
THD
P
L
US NO
I
SE v
s
.
I
N
P
U
T
S
I
G
NAL
AM
P
L
I
TUDE (MAX
7
403)
TABLE A.
THD
P
L
US NO
I
SE v
s
.
I
N
P
U
T
S
I
G
NAL
AM
P
L
I
TUDE TEST CONDITIONS
0
0
NO LOAD
(S
E
E TABLE A)
f
= 200
H
z
IN
-10
-20
-30
-40
-50
-60
-70
-80
-90
-10
f =
1kHz
C
f
f
f
MEA
S
U
REMENT
IN
C
CLK
MEA
S
U
REMENT BW
=
2
2k
H
z
TRACE
-20
-30
-40
-50
(
H
z) (kHz)
(kHz) B
A
NDWIDTH
(
kHz)
R =
500
Ω
A
B
C
D
2800 14 1400
2000 10 1000
80
80
80
22
L
R
L =
1k
Ω
B
-60
C
R =
10k
Ω
L
1000
200
5
1
500
100
D
-70
-80
-90
0
1
2
3
4
5
0
1
2
3
4
5
AM
P
L
ITUDE
(
V
p
-p)
AM
P
L
ITUDE
(
V
p
-p)
THD
P
L
US NO
I
SE v
s
.
I
N
P
U
T
S
I
G
NAL
AM
P
L
I
TUDE AND RESISTIVE LOAD (MAX
7
404)
THD
P
L
US NO
I
SE v
s
.
I
N
P
U
T
S
I
G
NAL
AM
P
L
I
TUDE (MAX
7
404)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
f
= 200
H
z
IN
NO LOAD
(S
E
E TABLE A)
-10
-20
-30
-40
-50
-60
-70
-80
-90
f =
1kHz
C
MEA
S
U
REMENT BW =
2
2k
H
z
R =
500
Ω
L
A
B
R =
10k
Ω
L
C
D
R =
1k
Ω
L
0
0.5
1.0
1.5
2.0
2.5
3.0
0
0.5
1.0
1.5
2.0
2.5
3.0
AM
P
L
ITUDE
(
V
p
-p)
AM
P
L
ITUDE
(
V
p
-p)
THD
P
L
US NO
I
SE v
s
.
I
N
P
U
T
S
I
G
NAL
AM
P
L
I
TUDE AND RESISTIVE LOAD (MAX
7
407)
THD
P
L
US NO
I
SE v
s
.
I
N
P
U
T
S
I
G
NAL
AM
P
L
I
TUDE (MAX
7
407)
0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
f
= 200
H
z
IN
NO LOAD
(S
E
E TABLE A)
-10
-20
-30
-40
-50
-60
-70
-80
-90
f =
1kHz
C
MEA
S
U
REMENT BW =
2
2k
H
z
R =
500
Ω
L
A
B
C
R =
1k
Ω
L
R =
10k
Ω
L
D
0
0.5
1.0
1.5
2.0
2.5
3.0
0
0.5
1.0
1.5
2.0
2.5
3.0
AM
P
L
ITUDE
(
V
p
-p)
AM
P
L
ITUDE
(
V
p
-p)
_______________________________________________________________________________________
7
8 t h –
O
rd e r,
Lo w p a s s ,
Ellip t ic ,
S w it c h e d -Ca p a c it o r
Filt e rs
T
y
p ic a l
Op e ra t in g
Ch a ra c t e ris t ic s
(c o n t in u e d )
(V
DD
=
+
5V
f
o
r
M
AX
7
400/
M
AX
7
403, V
=
+
3V
f
o
r
M
AX
7
404/
M
AX
7
407; V
= V
= V
/ 2;
SHDN
= V
; f
= 100kHz;
DD
COM
OS
DD
DD CLK
T
A
=
+
25°C; un
l
e
ss o
t
herwi
s
e noted.)
NORMAL
I
Z
ED O
S
CI
L
LATOR
F
REQUENCY
v
s
.
T
EM
P
E
RATURE
I
N
TERNAL OSCILLATOR FREQUENCY
NORMAL
I
Z
ED O
S
CI
L
LATOR
F
REQUENCY
v
s
.
S
U
P
P
L
Y
VOLTAGE
v
s
. C
CA
P
A
CITANCE
O
S
C
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
10,000
C
= 390pF
O
S
C
C
= 390pF
O
S
C
1000
100
10
MAX
7
400
MAX
7
403
MAX
7
404
MAX
7
407
MAX
7
404
MAX
7
407
MAX
7
400
MAX
7
403
1
0.1
0.01
-40 -20
0
20
40
60
80 100
10
1000
2.5
3.0
3.5
4.0
4.5
5.0
5.5
1
100
0.1
TEM
P
E
RATURE
(
°C)
S
U
P
P
L
Y VOLTAGE
(
V
)
C
O
S
C
C
A
P
A
C
IT
A
NCE
(
nF)
P in
De s c rip t io n
PIN
NAME
FUNCTION
Common
I
n
put. B
i
a
sed
i
n
terna
l
ly
a
t m
i
d
supp
l
y. By
p
ass e
x
t
e
r
na
l
ly to
G
ND with a 0.1µF
c
apac
i
tor. To ov
e
r
–
ri
d
e
i
n
ternal
b
i
a
s
i
n
g, d
r
ive with
a
n e
x
t
e
r
nal supp
l
y.
1
COM
2
3
4
5
IN
Filt
e
r
I
n
put
GND
Ground
V
DD
Pos
i
tive Su
p
p
l
y I
n
put: +5V
f
o
r
M
AX
7
400/
M
AX
7
403, +3V
f
o
r
M
AX
7
404/
M
AX
7
407
Filt
e
r Output
OUT
OS
3/MAX407
O
f
f
s
et
A
d
j
u
st
I
n
put.
T
o
a
d
j
u
st output o
f
f
s
e
t
,
b
i
a
s OS e
x
t
e
r
na
l
ly.
C
onnect OS to COM
i
f
n
o o
f
f
s
et ad
j
u
stment
i
s
needed.
R
e
f
e
r
t
o
O
f
f
s
et and Common-
M
o
de
I
n
put
A
d
j
u
stment
s
ec
t
ion.
6
7
8
Shutdown
I
n
put. Dr
i
ve l
o
w to enab
l
e
s
hutdown mode; dr
i
ve hi
g
h or connect to V
f
o
r normal operat
i
o
n.
DD
SHDN
C
L
K
C
l
o
ck
I
n
put.
T
o
o
verri
d
e
t
he int
e
r
nal osc
i
ll
a
t
or,
c
onnect to an external c
l
o
ck; otherw
i
s
e, connect an e
x
t
e
r
nal
capac
i
tor (C
) from CLK to GND to
s
et
t
he int
e
r
nal osc
i
ll
a
t
or fr
e
quenc
y
.
OSC
8
_______________________________________________________________________________________
8 t h –
O
rd e r,
Lo w p a s s ,
Ellip t ic ,
S w it c h e d -Ca p a c it o r
Filt e rs
3/MAX407
De t a ile d
De s c rip t io n
T
h
e
M
AX
7
400/
M
AX
7
403/
M
AX
7
404/
M
AX
7
407
f
a
m
i
ly
o
f
8th-order,
l
o
wpass
f
ilt
e
r
s
p
r
ovi
d
es sha
r
p rolloff with
g
o
od
s top b a nd
re
j
e c ti
o
n.
A
ll p
a rts
op e ra te
with a
100:1 c
l
o
ck-to-corner
f
r
e
quency
r
a
t
io
a
nd a 10kHz
max
i
m
um corner
f
r
e
quenc
y
. Th
e
se de
v
i
c
es accept a
s
i
n
g
l
e
+
5V
(
M
AX
7
400/
M
AX
7
403) or +3V (
M
AX
7
404/
MAX
7
407) supp
l
y. Fi
g
ure 1 shows the
f
u
nct
i
o
nal d
i
a
–
g
r
a
m.
INT
CLOCK
7
4
8
2
S
H
DN
CLK
IN
LOGIC
V
DD
V
DD
M
o
st s
w
it
c
hed
–
c
apac
i
tor filt
e
r
s (SFCs) are des
i
g
ned
with
b
i
q
uad
r
a
t
ic
s
ec
t
ion
s
.
E
a
ch sec
t
ion im
p
l
e
ments two
filt
e
r
ing
p
o
l
e
s, and
t
he sect
i
o
ns can be cascaded
t
o
p
r
oduce h
i
g
he
r
-or
d
er
f
ilt
e
r
s
.
T
h
e ad
v
a
ntage of th
i
s
a p p roa c h
is e
a s e
of d
e s ig n.
Howe ve r,
this typ
e of
des
i
g
n
i
s
h
i
g
h
l
y
s
ens
i
tive to
c
omponent var
i
a
t
ions if
a
ny
sec
t
ion
’
s Q is
h
i
g
h.
T
h
e
M
AX
7
400
f
a
m
i
ly
u
ses an a
l
t
e
r
–
nat
i
ve
a
pp
r
oach, wh
i
c
h
i
s to
e
mu
l
a
t
e a
p
ass
i
ve n
e
t
work
us
i
n
g sw
i
t
c
hed
–
c
apac
i
tor int
e
g
r
a
t
ors with
s
umm
i
n
g and
sca
l
i
n
g.
T
h
e pass
i
ve n
e
t
work
c
an be s
y
nthes
i
z
ed us
i
n
g
C
A
D
p
r
ograms or can be
f
o
und
i
n
m
any
f
ilt
e
r books.
Fi
g
ure 2 shows a bas
i
c
8
th-order
l
a
dder e
l
li
p
t
ic filt
e
r
s
t
ru
c
t
ur
e
.
MAX
7
400
MAX
7
403
MAX
7
404
MAX
7
407
SCF
1
5
6
3
COM
OUT
OFFSET
ADJ
OS
GND
BIAS
A
s
w
it
c
hed
–
c
apac
i
tor filt
e
r
t
hat emu
l
a
t
e
s a pass
i
ve l
a
d-
der
f
ilt
e
r
r
e
t
a
i
n
s many of the same advantages.
T
h
e
component sens
i
tivity of a
p
ass
i
ve l
a
dder
f
ilt
e
r
i
s l
o
w
when compared to a cascaded b
i
q
uad
r
a
t
ic
d
es
i
g
n,
because each component a
f
f
e
c
t
s the
e
nt
i
re filt
e
r shape
r
a
t
her than a s
i
n
g
l
e
p
o
l
e
–
zero pa
i
r. In
o
ther words, a
m
i
s
ma
t
c
hed component
i
n a
b
i
q
uad
r
a
t
ic
d
es
i
g
n has a
concentrated error on
i
ts r
e
spec
t
ive
p
o
l
e
s,
w
hile the
same m
i
s
ma
t
c
h
i
n a l
a
dder
f
ilt
e
r des
i
g
n sp
r
e
ads
i
ts
e
r
ror over a
l
l
p
o
l
e
s.
Fi
g
ure 1.
Funct
i
o
nal D
i
a
g
r
a
m
C11
L7
C9
C10
R1
L5
L1
L3
Ellip t ic
Ch a ra c t e ris t ic s
L
o
wpass, e
l
li
p
t
ic filt
e
r
s
s
uch as
t
he MA
X
7
400/
M
AX
7
403/
MAX
7
404/
M
AX
7
407 prov
i
d
e
t
he steepest poss
i
b
l
e rolloff
with fr
e
quency of the
f
o
ur most common
f
ilt
e
r
t
y
p
es
(Butt
e
r
worth, B
e
sse
l
,
C
hebyshev, and E
l
li
p
t
i
c
)
. Fi
g
ure 3
shows the 8th-order e
l
li
p
t
ic filt
e
r
r
e
sponse.
T
h
e h
i
g
h Q
v
a
l
u
e of
the po
l
e
s near
t
he passband edge comb
i
n
ed
with the
s
t
opband zeros a
l
l
o
ws for the
s
ha
r
p
a
t
t
e
nua-
tion c
ha ra c te ris tic
of e
llip tic
filte rs ,
ma king
the s e
de
v
i
c
es
i
d
eal
f
o
r ant
i
–
a
l
i
a
s
i
n
g and post-D
A
C filt
e
r
ing in
s
i
n
g
l
e
–
s
upp
l
y
s
y
s
t
e
ms (see the
A
n
ti-Ali
a
s
i
n
g and Post-
DAC Filt
e
r
ing
s
ec
t
ion).
+
–
V
0
V
IN
C6
R2
C2
C4
C8
Fi
g
ure 2.
8th-Order
L
a
dder
F
ilt
e
r
N
e
t
work
T
h
e corner
f
r
e
quenc
y
, f
, is
d
e
f
i
n
ed as
t
he po
i
n
t where
C
the filt
e
r output attenuat
i
o
n
f
a
l
ls j
u
st be
l
o
w the passband
ri
p
p
l
e
.
T
h
e tr
a
ns
i
ti
o
n rat
i
o is
d
e
f
i
n
ed as
t
he r
a
t
io of the
s
t
opband
f
r
e
quency
t
o the
c
orner
f
r
e
quenc
y
:
r = f
/ f
S
C
In the fr
e
quency doma
i
n
, the
f
ir
s
t
t
r
a
nsm
i
s
s
i
o
n zero
causes
t
he filt
e
r
’
s
a
mp
l
it
u
de to drop to a m
i
n
i
m
um
l
e
v
e
l
.
B
e
y
ond this zero, the response r
i
s
es as
t
he fr
e
quency
i
n
creases unt
i
l
the n
e
x
t tr
a
nsm
i
s
s
i
o
n zero.
T
h
e stopband
T
h
e
M
AX
7
400/
M
AX
7
404 have a trans
i
ti
o
n rat
i
o
o
f 1.5
a
n
d
a typ
ic a l
s top b a nd
re je c tion
of 82d
B. The
MAX
7
403/
M
AX
7
407 have a trans
i
ti
o
n rat
i
o
o
f 1.2 (pro-
vid i
n
g
the s
te e p e s t
rolloff) a
nd a typ
ic a l
s top b a nd
r
e
j
e
c
t
ion of 60dB.
beg
i
n
s at the stopband
f
r
e
quenc
y
, f . At fr
e
quenc
i
e
s
S
abo
v
e f , the filt
e
r
’
s
g
a
i
n
d
oes not exceed the ga
i
n
a
t f .
S
S
_______________________________________________________________________________________
9
8 t h –
O
rd e r,
Lo w p a s s ,
Ellip t ic ,
S w it c h e d -Ca p a c it o r
Filt e rs
V
S
U
P
P
L
Y
RIPPLE
0.1
µ
F
f
C
V
DD
S
H
DN
OUT
f
f
C
S
OUT
P
U
T
TRAN
S
ITION R
A
TIO =
INPUT
IN
COM
0.1
µ
F
0.1
µ
F
50k
50k
50k
f
S
MAX
7
400
MAX
7
403
MAX
7
404
MAX
7
407
CLOCK
CLK
OS
GND
P
A
S
S
B
AND
S
T
O
P
B
AND
FREQUENCY
f
C
f
S
Fi
g
ure 3.
E
l
li
p
t
ic Filt
e
r
R
e
sponse
Fi
g
ure 4.
O
f
f
s
et
A
d
j
u
stment C
i
r
c
u
i
t
i
n
put
i
m
pedance de
t
e
r
min
e
d by
t
he following
e
qua
t
ion
r
e
p
r
e
sen
t
s the
a
v
e
r
a
ge
i
n
put
i
m
pedance, s
i
n
ce the
i
n
put current
i
s
n
ot cont
i
n
uous.
A
s a rul
e
, use a d
r
iv
e
r
with
a
n output source
i
m
pedance
l
e
ss
t
han 10% of the
filt
e
r
’
s i
n
put
i
m
pedance.
E
s
t
im
a
t
e the in
p
ut
i
m
pedance
of the
f
ilt
e
r us
i
n
g the
f
o
l
l
o
wing formul
a
:
Clo c k
S ig n a l
External Clock
T
h
e
M
AX
7
400/
M
AX
7
403/
M
AX
7
404/
M
AX
7
407 SCFs
w
e
r
e
d
es
i
g
ned
f
o
r use w
i
th
e
x
t
e
r
nal c
l
o
cks that have a
40% to 60% duty cyc
l
e
.
W
h
en us
i
n
g an e
x
t
e
r
nal c
l
o
ck,
d
r
ive CLK
with a CMOS
g
a
t
e
p
owered
f
rom 0 to V
.
DD
1
V
a
r
ying the r
a
t
e of
the external
c
l
o
ck ad
j
u
sts the
f
ilt
e
r
corner
f
r
e
quenc
y
:
Z
(
Ω
)
=
IN
(f
C
)
IN
C
L
K
f
C
= f
/ 100
C
L
K
where f
=
c
l
o
ck
f
r
e
quency and C
= 0.85pF.
IN
C
L
K
Internal Clock
W
h
en us
i
n
g the
i
n
ternal osc
i
ll
a
t
or, the capac
i
t
a
nce
(C )
on the CLK
p
i
n
d
e
t
e
r
min
e
s
t
he osc
i
ll
a
t
or fr
e
–
Lo w -P o w e r
S h u t d o w n
Mo d e
T
h
ese de
v
i
c
es
f
e
a
t
ure a
s
hutdown mode that
i
s
a
c
t
iv
a
t
–
ed by d
r
iving
SHDN
l
o
w. P
l
a
c
i
n
g the
f
ilt
e
r
i
n
s
hutdown
mode reduces the supp
l
y
c
urrent to 0.2µA (typ) and
p
l
a
ces
t
he output of the
f
ilt
e
r
i
n
to a h
i
g
h-
i
m
pedance
s
t
a
t
e
.
F
or normal operat
i
o
n, dr
i
ve
SHDN
h
i
g
h or con-
OSC
quency:
3
K
10
f
(kHz) =
; C
in
p
F
OSC
OSC
C
OSC
nect
t
o V
.
DD
3/MAX407
where K
= 38
f
o
r the
M
AX
7
400/
M
AX
7
403, and K = 34
f
o
r the
M
AX
7
404/
M
AX
7
407. S
i
n
ce the capac
i
tor v
a
l
u
e
is in
p
i
c
o
f
a
r
a
ds, m
i
n
i
m
i
z
e the stray capac
i
t
a
nce at C
L
K
so
t
hat
i
t
d
oes not a
f
f
e
ct
t
he int
e
r
nal osc
i
ll
a
t
or fr
e
quen-
c
y
.
V
a
r
ying the r
a
t
e of the int
e
r
nal osc
i
ll
a
t
or ad
j
u
sts the
filt
e
r
’
s
c
orner
f
r
e
quency by a 100:1 c
l
o
ck-to-corner
f
r
e
–
quency rat
i
o
. For examp
l
e
, an
i
n
ternal osc
i
ll
a
t
or fr
e
–
q
u
e nc y
of 100kHz p
rod uc e s
a nom
i
n
a
l c
orne r
fr
e
quency of 1kHz.
Ap p lic a t io n s
In fo rm a t io n
Offs e t
a n d
Co m m o n -Mo d e
In p u t
Ad ju s t m e n t
T
h
e vo
l
t
a
ge at COM se
t
s the
c
ommon-mode
i
n
put vo
l
t-
age and
i
s i
n
terna
l
ly
b
i
a
sed at m
i
d
supp
l
y
b
y a
r
e
s
i
s
t
or-
d ivid e r.
Byp a s s
COM with a 0.1µF c
a p a c itor
a nd
connect OS to CO
M
. For
a
pp
l
i
c
a
t
ions r
e
qu
i
ri
n
g o
f
f
s
et
ad
j
u
stment or DC
l
e
v
e
l sh
i
fti
n
g, app
l
y
a
n e
x
t
e
r
nal b
i
a
s
volt
a
ge
t
hrough a res
i
s
t
or-
d
i
vi
d
er ne
t
work to OS, as
shown
i
n Fi
g
ure 4. (Note: Do not
l
e
a
v
e OS unconnect-
ed.)
T
h
e output vo
l
t
a
ge
i
s r
e
p
r
e
sen
t
e
d by
t
he following
equa
t
ion:
In p u t
Im p e d a n c e
vs .
Clo c k
Fre q u e n c ie s
T
h
e
M
AX
7
400/
M
AX
7
403/
M
AX
7
404/
M
AX
7
407
’
s i
n
put
i
m
pedance
i
s
e
f
f
e
c
t
iv
e
l
y th
a
t of a s
w
it
c
hed
–
c
apac
i
tor
r
e
s
i
s
t
or and
i
s i
n
verse
l
y
p
r
oport
i
o
nal to
f
r
e
quenc
y
. The
V
OUT
= (V
– V
) + V
COM OS
IN
10 ______________________________________________________________________________________
8 t h –
O
rd e r,
Lo w p a s s ,
Ellip t ic ,
S w it c h e d -Ca p a c it o r
Filt e rs
3/MAX407
with V
= V
/ 2 (ty
p
i
c
a
l
),
a
nd where (V
– V
)
An t i-Alia s in g
a n d
P o s t -DAC
Filt e rin g
W
h
e n
us
i
n
g
the
M
AX
7
400/
M
AX
7
403/
M
AX
7
404/
MAX
7
407
f
o
r ant
i
–
a
l
i
a
s
i
n
g or post-D
A
C filt
e
r
in
g
, s
y
n-
chron
i
z
e the DAC
a
nd the
f
ilt
e
r c
l
o
cks.
I
f the
c
l
o
cks are
not synchron
i
z
ed, beat
f
r
e
quenc
i
e
s may a
l
i
a
s
i
n
to the
passband.
COM
DD
IN
COM
is l
o
wpass
f
ilt
e
r
e
d by
t
he SCF, and V
i
s
a
dded at
t
he
OS
output stage. See the
El
e
c
t
ri
c
al Character
i
s
t
i
c
s
f
o
r
COM and
OS
i
n
put vo
l
t
a
ge
r
a
nges. Chang
i
n
g the volt-
a g e
o
n COM or OS s
i
g
n
i
fic a
n
tly
from mid
s up p ly
r
e
duces
t
he filt
e
r
’
s
d
y
nam
i
c r
a
nge.
T
h
e h
i
g
h c
l
o
ck-to-corner
f
r
e
quency
r
a
t
io (100:1)
a
l
s
o
eases
t
he r
e
qu
i
r
e
ments of
pre- and post-SCF
f
ilt
e
r
in
g
.
At the in
p
ut, a
l
o
wpass
f
ilt
e
r p
r
e
v
e
nts the a
l
i
a
s
i
n
g of
f
r
e
–
quenc
i
e
s a
r
ound the c
l
o
ck
f
r
e
quency
i
n
to the pass-
band.
A
t the out
p
ut, a
l
o
wpass
f
ilt
e
r a
t
t
e
nuates the
c
l
o
ck
f
e
ed
t
hrough.
P o w e r
S u p p lie s
T
h
e
M
AX
7
400/
M
AX
7
403 operate
f
rom a
s
i
n
g
l
e
+
5V
supp
l
y. T
h
e
M
AX
7
404/
M
AX
7
407 operate
f
rom a
s
i
n
g
l
e
+3V supp
l
y.
By
p
ass V
to GND with a 0.1µF
c
apac
i
–
DD
tor. If
d
ual supp
l
i
e
s a
r
e r
e
qu
i
r
e
d, connect COM to the
s
y
s
t
e
m g
r
ound and GND to the negat
i
ve
s
upp
l
y. Fi
g
ure
5
s
hows an examp
l
e
o
f dua
l
–
s
upp
l
y
o
pe
r
a
t
ion. Sin
g
l
e
–
supp
l
y
a
nd dua
l
–
s
upp
l
y
p
e
r
form
a
nce a
r
e
e
qu
i
v
a
l
e
nt.
For s
i
n
g
l
e
–
s
upp
l
y
o
r dua
l
–
s
upp
l
y
o
pe
r
a
t
ion,
d
r
ive CLK
and
SHDN
from GND (
V
– in
d
ua
l
–
s
upp
l
y
o
pe
r
a
t
ion) to
A h
i
g
h c
l
o
ck-to-corner
f
r
e
quency
r
a
t
io
a
l
l
o
ws a s
i
m
p
l
e
RC low
p
ass
f
ilt
e
r
, with the
c
uto
f
f fr
e
quency set abo
v
e
the SCF corner
f
r
e
quenc
y
, to
p
r
ovi
d
e
i
n
put ant
i
–
a
l
i
a
s
i
n
g
and reasonab
l
e
o
utput c
l
o
ck a
t
t
e
nuat
i
o
n.
V .
For a ±2.5V
supp
l
y, u
s
e
t
he MA
X
7
400 or
M
AX
7
403;
DD
Ha rm o n ic
Dis t o rt io n
H
a
r
mon
i
c
d
i
s
t
ortion
a
r
i
s
es
f
rom nonlin
e
a
r
iti
e
s
w
ithin the
filt
e
r
. Such non
l
i
n
ea
r
iti
e
s gene
r
a
t
e harmon
i
c
s
w
hen a
pure s
i
n
e wave
i
s
a
pp
l
i
e
d
t
o the filt
e
r
i
n
put.
T
a
b
l
e 1 li
s
t
s
ty
p
i
c
al ha
r
mon
i
c
d
i
s
t
ortion v
a
l
u
es w
i
th a 10k
Ω
l
o
ad and
an
i
n
put s
i
g
nal of 4
V
p
–
p (MAX
7
400/
M
AX
7
403) or 2
V
p
–
p
f
o
r a ±1.5V
supp
l
y, u
s
e
M
AX
7
404 or
M
AX
7
407. For ±5V
dua
l
–
s
upp
l
y
a
pp
l
i
c
a
t
ion
s
, use
t
he MA
X
2
91–
M
AX
2
97.
In p u t
S ig n a l
Am p lit u d e
Ra n g e
T
h
e
i
d
eal
i
n
put s
i
g
nal
r
a
nge
i
s
d
e
t
e
r
min
e
d by obse
r
v-
i
n
g the volta
g e
le ve l
a t
whic h
the tota
l ha
rmonic
d
i
s
t
ortion
p
l
u
s no
i
s
e
(
THD
+
N
) is minimiz
e
d
f
o
r a g
i
v
e
n
corner
f
r
e
quenc
y
. The
Ty
p
i
c
al Ope
r
a
t
ing
Character-
is tic s
s
h
ow
T
HD
+
N
r
e
s p ons e
a s
the inp
ut s
ig na l
’
s
pea
k
-to-
p
eak amp
l
it
u
de
i
s v
a
r
i
e
d.
T
h
ese measurements
a
r
e made w
i
th OS
a
nd COM b
i
a
sed at m
i
d
supp
l
y.
(MAX
7
404/
M
AX
7
407), at T
= +25°C.
A
Table 1. Typical Harmonic Distortion
V+
TYPICAL
HARMONIC
DISTORTION (dB)
f
f
f
V
IN
CLK
C
IN
FILTER
(kHz) (kHz) (Hz) (Vp-p)
*
V
DD
2nd 3rd 4th 5th
S
H
DN
OUT
OUT
P
U
T
100
500
100
500
100
500
100
500
1
5
1
5
1
5
1
5
200
1000
200
-89 -82 -89 -86
-89 -77 -93 -88
-88 -81 -91 -87
-84 -80 -90 -91
-85 -82 -85 -86
-85 -81 -86 -84
-85 -82 -85 -86
-86 -84 -85 -86
INPUT
IN
COM
MAX
7
400
MAX
7
403
MAX
7
404
MAX
7
407
4
4
2
2
MAX
7
400
MAX
7
403
MAX
7
404
MAX
7
407
V+
V-
CLOCK
CLK
OS
1000
200
0.1
µ
F
0.1
µ
F
GND
1000
200
V-
1000
*DRIVE
S
H
DN TO V-
FOR LOW
–
P
O
WER
S
H
UTDOWN MODE.
Fi
g
ure 5.
Dua
l
-Su
p
p
l
y
O
pe
r
a
t
ion
______________________________________________________________________________________ 11
8 t h –
O
rd e r,
Lo w p a s s ,
Ellip t ic ,
S w it c h e d -Ca p a c it o r
Filt e rs
Ord e rin g
In fo rm a t io n
(c o n t in u e d )
Ch ip
In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 SO
TRANSISTOR COUNT: 1116
MAX7403
CSA
MAX
7
403CPA
MAX
7
403ESA
MAX
7
403EPA
MAX7404
CSA
MAX
7
404CPA
MAX
7
404ESA
MAX
7
404EPA
MAX7407
CSA
MAX
7
407CPA
MAX
7
407ESA
MAX
7
407EPA
8 P
l
a
s
t
ic DIP
8 SO
8 P
l
a
s
t
ic DIP
8 SO
8 P
l
a
s
t
ic DIP
8 SO
8 P
l
a
s
t
ic DIP
8 SO
8 P
l
a
s
t
ic DIP
8 SO
8 P
l
a
s
t
ic DIP
P a c k a g e
In fo rm a t io n
3/MAX407
M
a
x
im
c
annot assume respons
i
b
i
lity f
o
r use of any c
i
r
c
u
i
try oth
e
r
t
han c
i
r
c
u
i
try
e
nt
i
r
e
l
y
e
mbod
i
e
d
i
n a M
a
x
im
p
r
oduct. No c
i
r
c
u
i
t
p
a
t
e
nt
l
i
c
enses a
r
e
i
m
p
l
i
e
d.
M
a
x
im r
e
se
r
v
e
s
t
he ri
g
ht to change the c
i
r
c
u
i
try
a
nd spec
i
fi
c
a
t
ions without noti
c
e at any
t
im
e
.
12
____________________Ma x im
In t e g
r
a t e d
P ro d u c t s ,
1 2 0
S a n
Ga b rie l
Drive ,
S u n n yva le ,
CA 9
4 0 8 6
4 0 8
–
7 3 7 -7 6 0 0
© 1999
M
a
x
im I
n
tegrated Products
Print
e
d
U
SA
is a r
e
g
i
s
t
e
r
e
d
t
r
a
dema
r
k of M
a
x
im I
n
tegrated Products.
