PT4302

Ultra-Low Power OOK/ASK Receiver

Tel: 886-2-66296288

‧Fax: 886-2-29174598‧ http://www.princeton.com.tw‧2F, No. 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan

DESCRIPTION

The PT4302 is an ultra-low power OOK/ASK super

heterodyne receiver for the 315/433.92 MHz frequency

bands. It offers a high level of integration and requires

only few external components. The PT4302 consists of

a low-noise amplifier (LNA), a down-conversion mixer,

an on-chip phase-locked loop (PLL) with integrated

voltage-controlled oscillator (VCO) and loop filter, an

OOK/ASK demodulator, a data filter, a data slicing

comparator and an on-chip regulator.

The PT4302

also implements a discrete one-step automatic gain

control (AGC) that reduces the LNA gain when the RF

input signal is greater than

–68 dBm.

The AGC

circuitry can extend the dynamic range of received RF

signal.

The PT4302 is available in a 16-pin SSOP package

and is specified over the extended temperature range

(

–40 to +85°C).

FEATURES

 Ultra-low power consumption: 2.7 mA for full

operation (315 MHz)

 Few external components

 Excellent sensitivity of the order of –111 dBm

(peak ASK signal level)

 2.4 V to 5.5 V supply voltage range

 250 MHz to 500 MHz frequency range

 Data rate up to 10 Kb/s

APPLICATIONS

 Automotive remote keyless entry (RKE)

 Remote control

 Garage door and gate openers

 Suitable for applications that meet either the

European ETSI-300-220 or the North American

FCC (Part 15) regulatory standards

BLOCK DIAGRAM

LNA

Buffer

Amplifier

OOK/ASK

Demodulator

Data Filter

(LPF)

PLL

Reference

Oscillator

On-Chip

Regulator

VDD5

Comparator

1

2

3

4

5

6

7

8

IFIN

MIXOUT

VBB

VRF

ANT

VSSRF

VSSLO

Mixer

16

15

14

13

12

11

10

9

REFOSC

CTH

DO

CE

SELA

SELB

VSSBB

Control Logic

VLO

AGC