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PTC

PT4317 Datasheet Preview

PT4317 Datasheet

Low Power 315/433 MHz OOK/ASK Superheterodyne Receiver

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DESCRIPTION
The PT4317 is a low power single chip OOK/ASK
superheterodyne receiver for the 315MHz and
434MHz frequency bands that offers a high level of
integration and requires few external components.
The PT4317 consists of a low-noise amplifier (LNA),
down-conversion mixer, SAW-based local oscillator,
on-chip gm-C band-pass filter, intermediate frequency
(IF) limiting amplifier stage with received-signal-
strength indicator (RSSI), and analog baseband data
recovery circuitry (data filter, peak detector, and data
slicer). The PT4317 is available in a 16-pin SSOP
package.
APPLICATIONS
Remote Keyless Entry (RKE) systems
Remote control systems
Garage door openers
Alarm systems
Security systems
Wireless sensors
BLOCK DIAGRAM
Preliminary PT4317
Low Power 315/433MHz OOK/ASK
Superheterodyne Receiver with
SAW-Based Oscillator
FEATURES
Low current consumption (4.7mA at VDD=5.0V)
2.4V to 5.5V supply voltage operation range
Optimized for 315MHz or 434MHz ISM Band
Saw-based oscillator with low frequency drift
On-chip IF filter with better adjacent channel
rejection capability
Power down mode with very low supply current
(<1μA)
Low external parts count
16-pin SSOP package
Tel: 886-66296288Fax: 886-29174598http://www.princeton.com.tw2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan




PTC

PT4317 Datasheet Preview

PT4317 Datasheet

Low Power 315/433 MHz OOK/ASK Superheterodyne Receiver

No Preview Available !

APPLICATION CIRCUIT
PT4317
BILL OF MATERIALS
Part
Value
315MHz
433.92MHz
Unit
Description
L1 47n 27n H Antenna input matching, coil inductor.
C1 1.8p 1.8p F Antenna input matching.
C2/C4
100n
100n
F Power supply de-coupling capacitor.
C3Note1
470p
470p
F Data filter capacitor.
C5Note1
C6
150p
100n
150p
100n
F Data filter capacitor.
F
Peak detector bypass capacitor(average
mode)
C7Note1
22n
22n F Data slicer threshold charge capacitor.
C8/C9Note2
F SAW oscillator frequency trimming capacitors.
R1/R4
10K
10K MCU interface resistor (option).
R2
270K
270K
IF filter tuning resistor
R3 10 10 Power supply de-coupling resistor (option).
S1Note3
316.8
435.72
MHz SAW oscillator.
U1
PT4317 IC
PT4317 IC
U1 Receiver chip.
Notes:
1. The data filter and slicer are optimized for 2Kb/s data rate in this application circuit.
2. The C8 and C9 are trimming capacitors for fine tuning the oscillation frequency of SAW oscillator.
3. S1 is the SAW resonator, and the frequency drift tolerance of ±75KHz is acceptable.
PRE1.0
2
April 2011


Part Number PT4317
Description Low Power 315/433 MHz OOK/ASK Superheterodyne Receiver
Maker PTC
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PT4317 Datasheet PDF






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