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TH7120 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - 300 to 930MHz FSK/FM/ASK Transceiver - ETC

भाग संख्या TH7120
समारोह 300 to 930MHz FSK/FM/ASK Transceiver
मैन्युफैक्चरर्स ETC 
लोगो ETC लोगो 
पूर्व दर्शन
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TH7120 pdf
TH7120
300 to 930MHz
FSK/FM/ASK Transceiver
General Description
The TH7120 is a single chip FSK/FM/ASK transceiver IC. It is designed to operate in low-power multi-channel
programmable or single-channel stand-alone, half-duplex data transmission systems. It can be used for ISM,
SRD or any other application operating in the frequency ranging of 300 MHz to 930 MHz.
The TH7120 transceiver IC consists of the following building blocks:
" Low-noise amplifier (LNA) for high-sensitivity RF signal reception with switchable gain
" Mixer (MIX) for RF-to-IF down-conversion
" IF amplifier (IFA) to amplify and limit the IF signal and for RSSI generation
" Phase-coincidence demodulator with external ceramic discriminator (FSK Demodulator)
" Operational amplifier, connected to demodulator output (OA1)
" Operational amplifier, integrator circuit at FSK-AFC mode (OA2)
" Control logic with 3wire bus serial control interface (SCI)
" Reference oscillator (RO) with external crystal
" Reference divider (R counter)
Y" Programmable divider (N/A counter)
R" Phase-frequency detector (PFD)
" Charge pump (CP)
A" Voltage control oscillator (VCO) with internal varactor
" Power amplifier (PA) with adjustable output power
INThe transceiver can be used either as a 3wire-bus-controlled programmable or as a stand-alone fixed-
IMfrequency device. After power up, the transceiver is set to fixed-frequency mode. In this mode, pins
FS0/SDEN and FS1/LD must be connected to VEE or VCC in order to set the desired frequency of operation.
LThe logic levels at pins FS0/SDEN and FS1/LD must not be changed after power up in order to remain in
fixed-frequency mode.
EChannel frequency
PRFS0/SDEN
433.92 MHz
1
868.3 MHz
0
315.0 MHz
1
915.0 MHz
0
FS1/LD
0011
After the first logic level change at pin FS0/SDEN, the transceiver enters into programmable mode while pin
FS1/LD is now a PLL lock detector output. In this mode, the user can set any PLL frequency or mode of op-
eration by the SCI.
In the fixed-frequency mode, the user can set the transceiver to Standby, Receive, Transmit or Idle (only PLL
synthesizer active) mode via control pins RE/SCLK and TE/SDTA.
Operation mode
RE/SCLK
TE/SDTA
Standby
0
0
Receive
1
0
Transmit
0
1
Idle
1
1
3901007120
Rev. 005
Page 2 of 28
Data Sheet
Jan. 2002

विन्यास 28 पेज
डाउनलोड[ TH7120 Datasheet.PDF ]


शेयर लिंक


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