PTC-Princeton-Tech-PT4307-S
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PT4307
Compact 315 MHz OOK/ASK Receiver
DESCRIPTION
FEATURES
The PT4307 is a compact, fully integrated OOK/ASK
receiver with ±4 KV ESD (HBM) and ±1 KV ESD (CDM)
protections for 433.92 MHz frequency band, and just
requires few external components. The PT4307 consists of
a low-noise amplifier (LNA), image-rejection mixer (IRM),
built-in channel-select filter (CSF), OOK/ASK demodulator,
data filter, and data slicing comparator. The local oscillator
(LO) sub-system incorporates a monolithic VCO, ÷32
feedback divider, loop filter and fast start-up reference
oscillator to form a complete phase-locked loop-based
frequency synthesizer for single channel applications.
Normal operating of 4.3 mA at 315 MHz
Requires few external components
Achieves sensitivity of
–
114 dBm (peak ASK
signal level)
Supply voltage range: 2.4 to 5.5 V
Supports data rates up to 7.2 Kb/s
Wide input dynamic range with automatic gain
control handling
Image-rejection ratio of 25 dB
ESD protection levels up to ±4 KV HBM, ±400 V
MM and ±1 KV CDM
The PT4307 is available in an 8-pin SOP package and is
specified over the temperature range from
–
40 to +85 °C.
APPLICATIONS
Automotive Remote Keyless Entry (RKE)
Remote control
Garage door and gate openers
Suitable for applications that must adhere to either the
European ETSI-300-220 or the North American FCC
(Part 15) regulatory standard.
BLOCK DIAGRAM
XIN
8
Reference
Oscillator
PLL
I
1
2
VSS
ANT
Q
CSF
(BPF)
7
6
Limiter
RSSI
CTH
DO
Data Filter
(LPF)
Buffer
Amplifier
LNA
IRM
On-Chip
Regulator
3
VREG
4
5
VDD5
EN
PT4307
EVALUATION BOARD SCHEMATIC
U1
X1
C5
C4
1
8
7
VSS
ANT
XIN
C1
CTH
2
3
4
PTC
C2
VREG
PT4307-S
6
5
DO
EN
L1
L2
VDD5
VDD5
VDD5
R1
R2
C3
BILL OF MATERIALS
Part
L1
Value
68 n
Unit
H
Description
Antenna input matching, coil inductor
Antenna ESD protection, coil inductor (optional)
Antenna input matching
L2
82 n
H
C1
1.5 p
100 n
470 n
F
Power supply de-coupling capacitor
C
TH
, affects coding type and start-up time
C2/C3
C4
F
F
Dependent upon crystal oscillator vendor; for
frequency fine-tuning (optional)
C5
220 p
F
Power supply de-coupling resistor (optional)
For reducing data output noise (optional)
R1
R2
10
5.1 M
Crystal with
C
Load
= 220 pF
, for reference
oscillator
X1
U1
9.882
MHz
U1
Receiver chip
PT4307 IC
Notes:
1. L1
and C1 are the components for input matching network. They may need to be adjusted for different PCB layout
and antenna requirements.
2. The
value of C4 depends upon the data rate and coding pattern.
3. The
optional
components may be used depending upon specific application requirements, e.g. C5 can
be removed if the crystal oscillator operates at the accurate frequency.
June 2016
V1.0
2
PT4307
315 MHZ APPLICATION EXAMPLE
U1
9.882 MHz
1
8
7
6
5
VSS
ANT
XIN
1.5 pF
68 nH
CTH
2
3
4
PTC
100 nF
470 nF
VDD5
VREG
PT4307-S
Etched
Inductor
on PCB
DO
EN
VDD5
VDD5
5.1 M
Ω
June 2016
V1.0
3
PT4307
ORDER INFORMATION
Valid Part Number
Package Type
Top Code
PT4307-S
8 Pins, SOP, 150 mil
PT4307-S
PIN CONFIGURATION
1
8
7
6
5
VSS
XIN
CTH
DO
EN
2
ANT
PT4307-S
3
VREG
4
VDD5
PIN DESCRIPTION
Pin No.
Pin Name
I/O
Description
SOP8
1
2
3
4
5
6
7
8
VSS
ANT
VREG
VDD5
EN
G
I
Ground
RF input connected to antenna via a matching network
Regulated core voltage
P
P
I
5 V regulator input
Chip enable (tie HIGH to enable the chip)
Data output
DO
O
I/O
I
CTH
XIN
Connection for data slicing threshold capacitor
Reference oscillator input
June 2016
V1.0
4
PT4307
IMPORTANT NOTICE
Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements,
improvements, and other changes to its products and to discontinue any product without notice at any time.
PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No
circuit patent licenses are implied.
Princeton Technology Corp.
2F, 233-1, Baociao Road,
Sindian Dist., New Taipei City 23145, Taiwan
Tel : 886-2-66296288
Fax: 886-2-29174598
June 2016
V1.0
15
