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PT4317

Part Number	PT4317
Manufacturer	PTC
Description	Low Power 315/433 MHz OOK/ASK Superheterodyne Receiver
Published	Dec 10, 2015
Detailed Description	DESCRIPTION The PT4317 is a low power single chip OOK/ASK superheterodyne receiver for the 315MHz and 434MHz frequency b...
Datasheet	PT4317 PDF File

Overview

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-signalstrength 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: 886-66296288‧Fax: 886-29174598‧ http://www.
princeton.
com.
tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan 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 Ω MCU interface resistor (option).
R2 270K 270K Ω IF filter tuning resistor R3 10 10 Ω Power supply de-coupling resis...

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