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TH7111 Datasheet

  • TH7111

  • FSK /FM/ASK Receiver

  • 20頁(yè)

  • ETC

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TH7111
868/915MHz
FSK/FM/ASK Receiver
Features
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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.
TH7111
Temperature Range
-40 擄C to 85 擄C
Package
LQFP44
Application Examples
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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
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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 擄C to +85 擄C
Operating current: 7.5 mA at low gain and 9.2 mA at high gain mode
Standby current: < 100 nA
1)
with 40 kHz second IF filter BW (incl. SAW front-end filter loss)
Sensitivity: -109 dBm
2)
Sensitivity: -102 dBm 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: 鈥?0 dBm at ASK and 0 dBm at FSK
nd
Image rejection: > 65 dB (e.g. with SAW front-end filter and at 10.7 MHz 2 IF)
Spurious emission: < -70 dBm
Input frequency acceptance:
鹵50
kHz (with AFC option)
RSSI range: 70 dB
Frequency deviation range:
鹵5
kHz to
鹵120
kHz
Maximum data rate: 80 kbit/s NRZ
Maximum analog modulation frequency: 15 kHz
at
鹵
8 kHz FSK deviation, BER = 3鈰?0 and phase-coincidence demodulation
2)
-3
at
鹵
50 kHz FSK deviation, BER = 3鈰?0 and phase-coincidence demodulation
1)
-3
TH7111 Data Sheet
3901007111
Page 1 of 20
Nov. 2001
Rev. 005

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