TH71112(2001) 查看數據表（PDF） - Melexis Microelectronic Systems

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TH71112
(Rev.:2001)

868/915MHz FSK/FM/ASK Receiver

Melexis Microelectronic Systems  

TH71112

868/915MHz

FSK/FM/ASK Receiver

Features

! Double superhet architecture for high degree of image rejection

! FSK for digital data and FM reception for analog signal transmission

! FM/FSK demodulation with phase-coincidence demodulator

! Low current consumption in active mode and very low standby current

! Switchable LNA gain for improved dynamic range

! RSSI allows signal strength indication and ASK detection

! Surface mount package LQFP32

Ordering Information

Part No.

TH71112

Temperature Range

-40 °C to 85°C

Package

LQFP32

Application Examples

! General digital and analog 868 MHz or 915 MHz ISM band usage

! Low-power telemetry

! Alarm and security systems

! Keyless car and central locking

! Pagers

Technical Data Overview

! Input frequency range: 800 MHz to 930 MHz

! Power supply range: 2.5 V to 5.5 V

! Temperature range: -40 °C to +85 °C

! Operating current: 7.5 mA at low gain and 9.2 mA at high gain mode

! Standby current: < 100 nA

! Sensitivity: -109 dBm 1) with 40 kHz second IF filter BW (incl. SAW front-end filter loss)

! Sensitivity: -102 dBm 2) with 150 kHz second IF filter BW (incl. SAW front-end filter loss)

! Range of first IF: 10 MHz to 80 MHz

! Range of second IF: 455 kHz to 21.4 MHz

! Maximum input level: –10 dBm at ASK and 0 dBm at FSK

! Image rejection: > 65 dB (e.g. with SAW front-end filter and at 10.7 MHz 2nd IF)

! Spurious emission: < -70 dBm

! Input frequency acceptance: ±50 kHz (with AFC option)

! RSSI range: 70 dB

! Frequency deviation range: ±5 kHz to ±120 kHz

! Maximum data rate: 80 kbit/s NRZ

! Maximum analog modulation frequency: 15 kHz

1) at ± 8 kHz FSK deviation, BER = 3⋅10-3 and phase-coincidence demodulation

2) at ± 50 kHz FSK deviation, BER = 3⋅10-3 and phase-coincidence demodulation

TH71112 Data Sheet

3901071112

Page 1 of 20

Nov. 2001

Rev. 005

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