TH7111
868/915MHz
FSK/FM/ASK Receiver
TH7111 Data Sheet
Page 1 of 20
Nov. 2001
3901007111
Rev. 005
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.
Temperature Range
Package
TH7111
-40 °C to 85 °C
LQFP44
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 for double conversion and 3.3 V to 5.5 V for single conversion
! 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 2
nd 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
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