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TH7110

315/433MHz FSK/FM/ASK Double-Conversion Superheterodyne Receiver

Melexis Microelectronic Systems  

TH7110

315/433MHz FSK/FM/ASK

Double-Conversion Superheterodyne 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 either with phase-coincidence or PLL demodulator

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

! Switchable LNA gain for improved dynamic range

! AFC feature allows wide carrier frequency acceptance range

! RSSI allows signal strength indication and ASK detection

! Surface mount package LQFP44

Ordering Information

Part No.

TH7110

Temperature Range

-40 °C to 85 °C

Package

LQFP44

Application Examples

! General digital and analog 315 MHz or 433 MHz ISM band usage

! Low-power telemetry

! Alarm and security systems

! Keyless car and central locking

! Pagers

Technical Data Overview

! Input frequency range: 300 MHz to 500 MHz

! Power supply range: 2.3 V to 5.5 V at ASK and 2.5 V to 5.5 V at FSK

! Temperature range: -40 °C to +85 °C

! Operating current: 6.5 mA at low gain and 7.8 mA at high gain mode

! Standby current: 50 nA

! Sensitivity: -111 dBm 1) with 40 kHz second IF filter BW (incl. SAW front-end filter loss)

! Sensitivity: -104 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

! Input impedance: 50 Ω

! 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

Datasheet Rev 2.3 July 2001

Page 1 of 22

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