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參數(shù)資料
| 型號： | TH71112 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 868/915MHz FSK/FM/ASK Receiver |
| 中文描述： | 868/915MHz FSK信號/調(diào)頻/ ASK接收機 |
| 文件頁數(shù)： | 2/20頁 |
| 文件大?。?/td> | 668K |
| 代理商： | TH71112 |
TH71112
868/915MHz
FSK/FM/ASK Receiver
TH71112 Data Sheet
3901071112
Page 2 of 20
Nov. 2001
Rev. 005
General Desc ription
The TH71112 receiver IC consists of the following building blocks:
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PLL synthesizer (PLL SYNTH) for generation of the first and second local oscillator signals LO1 and LO2
Parts of the PLL SYNTH are the high-frequency VCO1, the feedback dividers DIV_16 and DIV_2,
a phase-frequency detector (PFD) with charge pump (CP) and a crystal-based reference oscillator (RO)
Low-noise amplifier (LNA) for high-sensitivity RF signal reception
First mixer (MIX1) for down-conversion of the RF signal to the IF1
second mixer (MIX2) for down-conversion of the IF1 to the second IF (IF2)
IF amplifier (IFA) to amplify and limit the IF signal and for RSSI generation
Phase coincidence demodulator (DEMOD) with third mixer (MIX3) to demodulate the IF signal
Operational amplifier (OA) for data slicing, filtering and ASK detection
Bias circuitry for bandgap biasing and circuit shutdown
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With the TH71112 receiver chip, various circuit configurations can be arranged in order to meet a number of
different customer requirements. For FM/FSK reception the IF tank used in the phase coincidence demodu-
lator can be constituted either by a ceramic resonator or an LC tank (optionally with a varactor diode to create
an AFC circuit). In ASK configuration, the RSSI signal is feed to an ASK detector, which is constituted by the
operational amplifier.
Demodulation
Type of receiver
FM / FSK
FM / FSK
ASK
narrow-band RX with ceramic demodulation tank
wide-band RX with LC demodulation tank
RX with RSSI-based demodulation
The superheterodyne configuration is double conversion where MIX1 and MIX2 are driven by the internal
local oscillator signals LO1 and LO2, respectively. This allows a high degree of image rejection, achieved in
conjunction with an RF frontend filter. Efficient RF frontend filtering is realized by using a SAW, ceramic or
helix filter in front of the LNA and by adding an LC filter at the LNA output.
A single-conversion variant, called TH71111, is also available. Both RXICs have the same die. At the
TH71111 the second mixer MIX2 operates as an amplifier.
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相關(guān)代理商/技術(shù)參數(shù) |
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| TH71112ENE | 制造商:MELEXIS 制造商全稱:Melexis Microelectronic Systems 功能描述:868/915MHz FSK/FM/ASK Receiver |
| TH71112ENE-BAA-000-RE | 制造商:Melexis Semiconductors 功能描述:IC RECEIVER FSK/ASK 32LQFP 制造商:Melexis Semiconductors 功能描述:TH71112 Series 260 kbps 9.2 mA SMT 868/915 MHz FSK/ASK Receiver - LQFP-32 |
| TH71112ENE-BAA-000-TR | 功能描述:IC RECEIVER DBL-CON 32-LQFP RoHS:是 類別:RF/IF 和 RFID >> RF 接收器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 09/Jan/2012 標(biāo)準(zhǔn)包裝:50 系列:* 頻率:850MHz ~ 2.175GHz 靈敏度:- 數(shù)據(jù)傳輸率 - 最大:- 調(diào)制或協(xié)議:- 應(yīng)用:* 電流 - 接收:* 數(shù)據(jù)接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 特點:- 電源電壓:4.75 V ~ 5.25 V 工作溫度:0°C ~ 85°C 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| TH711311 | 制造商:C&K Components 功能描述: |
| TH712 | 制造商:Glenair Inc 功能描述: |
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