Low Power 315/433 MHz OOK/ASK Superheterodyne Receiver
Description
ANGUS ELECTRONICS CO.
, LTD
Tel: (852) 2345 0540 Fax: (852) 2345 9948 Web Site: www.
angus.
com.
hk
PT4316 Low Power 315/433MHz OOK/ASK Superheterodyne Receiver with SAW-based Oscillator
DESCRIPTION
The PT4316 is a very low power consumption single chip OOK/ASK superheterodyne receiver for the 315 MHz and 434 MHz frequency bands, which offers a high level of integration and requires few external components.
The PT4316 consists of a low-noise amplifier (LNA), mixer, SAW-based local oscillator, on-chip Sallen-Key low-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 PT4316 also implements a discrete one-step automatic gain control (AGC) that reduces the LNA gain by 20 dB when the RF input signal is greater than -60 dBm.
The PT4316 is available in a 16-pin SOP or SSOP package.
Both versions are specified over the extended temperature range (-40℃ to +85℃).
FEATURES
• • • • • • Low current consumption (4.
2 mA at VDD = 3.
0 V) 2.
4 V to 3.
6 V supply voltage operation range Optimized for 315 MHz or 434 MHz ISM Band Saw-based oscillator with low frequency drift High dynamic range with on-chip AGC Power down mode with very low supply current (< 1 µA) • Low external parts count • Available in 16-pin SOP or SSOP package
APPLICATIONS
• • • • • • Keyless entry systems Remote control systems Garage door openers Alarm systems Security systems Wireless sensors
BLOCK DIAGRAM
V1.
7
1
PT4316
APPLICATION CIRCUIT
Component S1Note1 R1, R2 R3 R4 R5 R6 L1 L2 C1, C5, C10, C12 C2 C3 C4Note3 C6 C7 C8Note3 C9 C11Note3
Value for 315 MHz Peak Mode Average Mode 313.
2 － 314.
5 315.
5 － 316.
8 33 33 10 K 10 K － 12 K － 1M 1K 1K 56 n 56 n 82 n 82 n 100 n 100 n 10 p 10 p 1.
8 p 1.
8 p 0.
56 p 0.
56 p 470 p 470 p 150 p 150 p 1.
5 p 1.
5 p 100 p 100 p － －
Value for 434 MHz Peak Mode Average Mode 432.
1 － 432.
4 434.
4 － 435.
7 33 33 10 K 10 K － 12 K － 1M ...
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