Analog-Devices-HMC7891
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2 GHz to 18 GHz
Limiting Amplifier Module
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAM
+V
High gain: 47 dB
P1dB output power: 10 dBm
HMC7891
REGULATION
Saturated output power (P
S
A
T
): 13 dBm
Limiting dynamic range: 40 dB minimum
Field replaceable SMA connectors
Operating temperature: −40°C to +85°C
IN
OUT
GND
APPLICATIONS
Telecom infrastructure
Test instrumentation
Electronic warfare
Aerospace
Figure 1.
Radar
GENERAL DESCRIPTION
2 GHz to 18 GHz, with a high gain of 47 dB. The amplifier provides
a saturated output power of 13 dBm over the input power range of
−30 dBm to +10 dBm, for a limiting dynamic range of 40 dB.
An integrated voltage regulator provides the proper bias voltage,
drawing 300 mA from a single dc power supply of 8 V
1
V
.
replaceable SMA connectors.
The amplifier can also be used as a frequency tripler due to the
plot of third harmonic levels with input signals from 2 GHz to
6 GHz with an input drive level of 10 dBm.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registere
d
t
rademarks ar
e
t
he property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2016 Analog Devices, Inc. All rights reserved.
HMC7891
Data Sheet
TABLE OF CONTENTS
REVISION HISTORY
10/2016—Revision 0: Initial
V
ersion
Rev. 0 | Page 2 of 11
Data Sheet
HMC7891
SPECIFICATIONS
Unless otherwise noted, specifications are with a bias voltage of 8 V and a baseplate temperature of 25°C.
Table 1. 2 GHz to 6 GHz Frequency Specifications
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
FREQUENCY RANGE
GAIN
2
6
GHz
Small Signal Gain
Gain Flatness (± ±
43
47
2.0
dB
dB
−45 dBm input
Total flatness over 2 GHz to 18 GHz
RADIO FREQUENCY (RF± OUTPUT POWER
1 dB Compression (P1dB±
7
10
40
10
13
13
16
dBm
dBm
dB
dBc
dBc
dB
Saturated Output Power (P
S
A
T
Limiting Dynamic Range
Second Harmonic
Third Harmonic
Noise Figure
±
−30 dBm to +10 dBm input
2 GHz to 3 GHz input, output at P
S
A
T
2 GHz input, output at P
S
A
T
−18
−14
3.4
RETURN LOSS
Input
Output
Small signal operation
15
22
dB
dB
DC POWER
Input Voltage
Current
7.0
8.0
0.3
9.0
0.4
V
A
Table 2. 6 GHz to 12 GHz Frequency Specifications
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
FREQUENCY RANGE
GAIN
6
12
GHz
Small Signal Gain
Gain Flatness (± ±
RF OUTPUT POWER
1 dB Compression (P1dB±
Saturated Output Power (P
S
A
T
Limiting Dynamic Range
Second Harmonic
Third Harmonic
Noise Figure
43
48
2.0
dB
dB
−45 dBm input
Total flatness over 2 GHz to 18 GHz
7
10
40
11
14
14
17
dBm
dBm
dB
dBc
dBc
dB
±
−30 dBm to +10 dBm input
3 GHz to 6 GHz input, output at P
S
A
T
2 GHz to 4 GHz input, output at P
S
A
T
−15
−14
2.8
RETURN LOSS
Small signal operation
Input
Output
19
23
dB
dB
DC POWER
Input Voltage
Current
7.0
8.0
0.3
9.0
0.4
V
A
Rev. 0 | Page 3 of 11
HMC7891
Data Sheet
Table 3. 12 GHz to 18 GHz Frequency Specifications
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
FREQUENCY RANGE
GAIN
12
18
GHz
Small Signal Gain
Gain Flatness (± ±
RF OUTPUT POWER
1 dB Compression (P1dB±
Saturated Output Power (P
S
A
T
Limiting Dynamic Range
Second Harmonic
Third Harmonic
Noise Figure
43
48
2.0
dB
dB
−45 dBm input
Total flatness over 2 GHz to 18 GHz
7
10
40
11
14
14
17
dBm
dBm
dB
dBc
dBc
dB
±
−30 dBm to +10 dBm input
6 GHz to 9 GHz input, output at P
S
A
T
4 GHz to 6 GHz input, output at P
S
A
T
−15
−8
3.5
RETURN LOSS
Small signal operation
Input
Output
17
15
dB
dB
DC POWER
Input Voltage
Current
7.0
8.0
0.3
9.0
0.4
V
A
Rev. 0 | Page 4 of 11
Data Sheet
HMC7891
ABSOLUTE MAXIMUM RATINGS
Table 4.
ESD CAUTION
Parameter
Rating
8 V Bias Line
10 V
RF Input Level
15 dBm
Operating Temperature Range
Storage Temperature Range
EDS Rating (HBM±
−40°C to +85°C
−65°C to +150°C
Class 1A
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
Rev. 0 | Page 5 of 11
HMC7891
Data Sheet
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
J3
J4
+V
IN
GND
HMC7891
J1
J2
LIMITING
AMP
2GHz TO
OUT
18GHz
Figure 2. Pin Configuration
Table 5. Pin Function Descriptions
Pin No.
Mnemonic Description
J1
J2
J3
J4
IN
OUT
+V
RF Input. IN has a frequency range of 2 GHz to 18 GHz, and an input signal maximum of 15 dBm.
RF Output. OUT has a frequency range of 2 GHz to 18 GHz.
8 V Input Supply.
GND
Ground Connection.
Rev. 0 | Page 6 of 11
Data Sheet
HMC7891
TYPICAL PERFORMANCE CHARACTERISTICS
15
14
13
12
11
10
9
INPUT RETURN LOSS
70
+85°C
+25°C
–40°C
GAIN
OUTPUT RETURN LOSS
50
30
10
–10
–30
–50
8
7
6
5
0
2
4
6
8
10
12
14
16
18
20
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
FREQUENCY (GHz)
Figure 3. Gain, Input Return Loss, and Output Return Loss vs. Frequency at 25°C
Figure 6. P1dB vs. Frequency for Various Temperatures
52
20
19
18
17
16
15
14
13
12
11
10
+85°C
+85°C
+25°C
–40°C
+25°C
51
–40°C
50
49
48
47
46
45
44
2
4
6
8
10
12
14
16
18
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
FREQUENCY (GHz)
Figure 7. Saturated Power (P
SAT
) vs. Frequency for Various Temperatures
Figure 4. Small Signal Gain vs. Frequency for Various Temperatures
0
0
+85°C
+85°C
+25°C
+25°C
–5
–5
–40°C
–40°C
–10
–10
–15
–20
–25
–30
–35
–40
–15
–20
–25
–30
–35
–40
2
4
6
8
10
12
14
16
18
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
FREQUENCY (GHz)
Figure 8. Output Return Loss vs. Frequency for Various Temperatures
Figure 5. Input Return Loss vs. Frequency for Various Temperatures
Rev. 0 | Page 7 of 11
HMC7891
Data Sheet
18
16
14
12
10
8
8
7
6
5
4
3
2
1
0
+85°C
+25°C
–40°C
+85°C
+25°C
–40°C
6
4
2
0
–45 –40 –35 –30 –25 –20 –15 –10
–5
0
5
10
2
4
6
8
10
12
14
16
18
P
(dBm)
FREQUENCY (GHz)
IN
Figure 9. Output Power (P
OUT
) vs. Input Power (P
IN
) at 2 GHz for
Various Temperatures
Figure 12. Noise Figure vs. Frequency for Various Temperatures
18
–10
+85°C
+25°C
–40°C
+85°C
+25°C
16
14
12
10
8
–15
–40°C
–20
–25
–30
–35
–40
–45
–50
6
4
2
0
–45 –40 –35 –30 –25 –20 –15 –10
–5
0
5
10
2
3
4
5
6
7
8
9
10
P
(dBm)
INPUT FREQUENCY (GHz)
IN
Figure 10. Output Power (P
OUT
) vs. Input Power (P
IN
) at 10 GHz for
Various Temperatures
Figure 13. Second Harmonic Output Power (P
2
) vs. Input Frequency for
Various Temperatures, Input Power = 10 dBm
18
–5
+85°C
+25°C
–40°C
+85°C
+25°C
–40°C
–6
–7
16
14
12
10
8
–8
–9
–10
–11
–12
–13
–14
–15
6
4
2
0
–45 –40 –35 –30 –25 –20 –15 –10
–5
0
5
10
2
3
4
5
6
P
(dBm)
INPUT FREQUENCY (GHz)
IN
Figure 14. Third Harmonic Output Power (P
3
) vs. Input Frequency for
Various Temperatures, Input Power = 10 dBm
Figure 11. Output Power (P
OUT
) vs. Input Power (P
IN
) at 18 GHz for
Various Temperatures
Rev. 0 | Page 8 of 11
Data Sheet
HMC7891
THEORY OF OPERATION
to a heat sink of a suitable size such that during operation, the
backside case temperature never exceeds 85°C. Operation of the
unit at backside case temperatures greater than 85°C results in
the reduced life of the unit.
The maximum current specification is 0.4 A. The power supply
must be capable of providing that much current.
To turn on the amplifier, complete the following steps:
1.
V
e
rify
that the dc connections are correct.
2.
V
e
rify
that the RF input is off.
3. Apply
7 V to 9 V dc voltage to the +V pin.
4. Apply
the RF input, ensuring that the power level is less
than 10 dBm.
Before applying dc voltages, provide both the RF input and
output with 50 Ω connections or terminations. Never disconnect
the RF output when dc voltage is applied to the unit.
The unit is designed to be operated over a voltage range of 7 V
to 9 V dc (8 V dc nominal). Providing less than 7 V can result in
failure of the internal regulator to generate the proper voltage.
Providing greater than 9 V increases the risk of overheating.
To turn off the amplifier, complete the following steps:
1.
T
u
rn
the RF input off.
2.
T
u
rn
off the dc supply.
The amplifier is operational whenever the dc voltage is applied.
There is no additional control circuitry.
Rev. 0 | Page 9 of 11
HMC7891
Data Sheet
APPLICATIONS INFORMATION
RF FRONT-END PROTECTION
GAIN EQUALIZATION
variety of RF systems, with an input limiting range of −30 dBm
to +10 dBm built in, removing the need for an additional
standalone limiter to protect other components in the system.
Many wideband RF components have an undesirable amount of
gain variation or negative gain slope over frequency. Components
and systems requiring gain equalization can be connected to the
With a low noise figure of 3.5 dB, a high gain of 47 dB, and a
suited for modern radar, communications, electronic warfare,
and multifunction systems.
The limiting amplifier output saturates with inputs ranging from
−30 dBm to +10 dBm for a total limiting dynamic range of 40 dB.
The saturated output power is flat over frequency and temperature,
of environments.
FREQUENCY TRIPLING
shows the typical third harmonic output levels relative to the
wideband analog frequency tripler due to this response.
As an example, an input tone at 4 GHz with a power level of
10 dBm produces a 13 dBm fundamental output tone at 4 GHz,
as well as a third harmonic at approximately 4.5 dBm (−8.5 dBc) at
12 GHz. The RF output can then be followed with a band-pass
filter centered at 12 GHz to filter out the fundamental output
and other harmonics.
Rev. 0 | Page 10 of 11
Data Sheet
HMC7891
OUTLINE DIMENSIONS
1.500
(38.10)
0.162
(4.11)
Ø 0.018
(0.457)
0.064
(1.63)
3
4
0.528
(13.41)
1
2
0.656
(16.66)
0.328
(8.33)
TOP VIEW
END VIEW
CHAMFER INDICATES
ORIENTATION
0.172
(4.37)
R 0.049
(1.25)
0.460
(11.68)
0.582
(14.78)
0.231
(5.87)
1.039
(26.39)
0.375
(9.53)
SIDE VIEW
0.365
(9.27)
CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
Figure 15. 4-Lead Module with Connector Interface [MODULE]
(ML-4-2)
Dimensions shown in inches and [millimeters]
ORDERING GUIDE
Model
Temperature Range
Package Description
Package Option
ML-4-2
HMC7891
−40°C to +85°C
4-Lead Module with Connector Interface [MODULE]
©2016 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D13793-0-10/16(0)
Rev. 0 | Page 11 of 11
