900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






ETC

TH71102 Datasheet Preview

TH71102 Datasheet

FSK/FM/ASK Receiver

No Preview Available !

TH71102
315/433MHz
FSK/FM/ASK 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 with phase-coincidence demodulator
! Low current consumption in active mode and very low standby current
! Switchable LNA gain for improved dynamic range
! RSSI allows signal strength indication and ASK detection
! Surface mount package LQFP32
Ordering Information
Part No.
TH71102
Temperature Range
-40 °C to 85°C
Package
LQFP32
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 450 MHz
! Power supply range: 2.5 V to 5.5 V
! Temperature range: -40 °C to +85 °C
! Operating current: 6.5 mA at low gain and 8.2 mA at high gain mode
! Standby current: < 100 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
! 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 = 310-3 and phase-coincidence demodulation
2) at ± 50 kHz FSK deviation, BER = 310-3 and phase-coincidence demodulation
TH71102 Data Sheet
3901071102
Page 1 of 20
Nov. 2001
Rev. 005




ETC

TH71102 Datasheet Preview

TH71102 Datasheet

FSK/FM/ASK Receiver

No Preview Available !

TH71102
315/433MHz
FSK/FM/ASK Receiver
General Description
The TH71102 receiver IC consists of the following building blocks:
" 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_8 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 first IF (IF1)
" second mixer (MIX2) for down-conversion of the IF1 to the second IF (IF2)
" IF amplifier (IFA) to amplify and limit the IF2 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
With the TH71102 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
FM / FSK
FM / FSK
ASK
Type of receiver
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 TH71101, is also available. Both RXICs have the same die. At the
TH71101 the second mixer MIX2 operates as an amplifier.
TH71102 Data Sheet
3901071102
Page 2 of 20
Nov. 2001
Rev. 005


Part Number TH71102
Description FSK/FM/ASK Receiver
Maker ETC
Total Page 20 Pages
PDF Download

TH71102 Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 TH7110 315/433MHz FSK/FM/ASK Receiver
ETC
2 TH71101 FSK/FM/ASK Receiver
ETC
3 TH71102 FSK/FM/ASK Receiver
ETC





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy