收藏本站
TH71111
868/915MHz
FSK/ASK Receiver
1
1.1
Theory of Operation
General
With the TH71111 receiver chip, various circuit configurations can be arranged in order to meet a number of
different customer requirements. For FSK reception the IF tank used in the phase coincidence demodulator
can be constituted by an external ceramic discriminator. In ASK configuration, the RSSI signal is fed to an
ASK detector, which is constituted by the operational amplifier.
A double-conversion variant, called TH71112, is also available. This receiver IC allows a higher degree of
image rejection, achieved in conjunction with an RF front-end filter. Both RXICs have the same die. At the
TH71112, the second mixer (MIX2) is used to down-convert the first IF (IF1) to the second IF (IF2). At the
TH71111, MIX2 operates as an amplifier.
Efficient RF front-end 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.
The TH71111 receiver IC consists of the following building blocks:
PLL synthesizer (PLL SYNTH) for generation of the local oscillator signal LO, parts of the PLL SYNTH are:
the high-frequency VCO1, the feedback divider DIV_32, 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 IF
IF pre amplifier which is a mixer cell (MIX2) that operates as an amplifier
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
1.2
Technical Data Overview
Input frequency range: 800 MHz to 930 MHz
Power supply range: 2.3 V to 5.5 V @ ASK
Temperature range: -40 °C to +85 °C
Standby current: 50 nA
Operating current: 7.5 mA @ low gain mode
9.2 mA @ high gain mode
Sensitivity: -112 dBm @ ASK 1)
-106 dBm @ FSK 2)
Maximum data rate: 260 kbps NRZ @ ASK
Range of IF: 400 kHz to 22 MHz
Maximum input level: -10 dBm @ ASK
0 dBm @ FSK
Image rejection: > 45 dB (e.g. with 868.3 MHz SAW
front-end filter and at 10.7 MHz IF)
Spurious emission: < -70 dBm
Input frequency acceptance range: up to ± 100 kHz
RSSI range: 70 dB
FSK deviation range: ± 2.5 kHz to ± 80 kHz
at 4 kbps NRZ, BER = 3 ? 10 , 180 kHz IF filter BW, without SAW front-end-filter loss
at 4 kbps NRZ, BER = 3 ? 10 , ± 20 kHz FSK deviation, 180 kHz IF filter BW, without SAW front-end-filter loss
180 kbps NRZ @ FSK
-3
-3
39010 71111
Rev. 015
Page 3 of 20
Data Sheet
Jun/12
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
TH71112ENE-BAA-000-TR IC RECEIVER DBL-CON 32-LQFP
THS9001DBVTG4 IC CASCADEABL AMP 350MHZ SOT23-6
TMD26711 IC PROXIMITY DETECTOR DGTL 8-MOD
TN0200K-T1-E3 MOSFET N-CH 20V 730MA SOT23-3
TN2404K-T1-GE3 MOSFET N-CH 240V 200MA TO236
TP0101K-T1-GE3 MOSFET P-CH D-S 20V TO236
TRF3702IRHCG4 IC QUADRATURE MODULATOR 16-VQFN
TRF3705IRGET IC QUADRATURE MODULATOR 24VQFN
相关代理商/技术参数
TH71112 制造商:MELEXIS 制造商全称:Melexis Microelectronic Systems 功能描述:868/915MHz FSK/FM/ASK Receiver
TH71112ENE 制造商:MELEXIS 制造商全称: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 类别:RF/IF 和 RFID >> RF 接收器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 09/Jan/2012 标准包装:50 系列:* 频率:850MHz ~ 2.175GHz 灵敏度:- 数据传输率 - 最大:- 调制或协议:- 应用:* 电流 - 接收:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 特点:- 电源电压:4.75 V ~ 5.25 V 工作温度:0°C ~ 85°C 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘
TH711311 制造商:C&K Components 功能描述:
TH712 制造商:Glenair Inc 功能描述:
TH7120 制造商:未知厂家 制造商全称:未知厂家 功能描述:300 to 930MHz FSK/FM/ASK Transceiver
TH7121 制造商:未知厂家 制造商全称:未知厂家 功能描述:300 to 930MHz FSK/FM/ASK Transceiver