TH7121 Datasheet, PDF (4/28 Pages) List of Unclassifed Manufacturers – 300 to 930MHz FSK/FM/ASK Transceiver

TH7121
300 to 930MHz
FSK/FM/ASK Transceiver
Pin Definition and Description
Pin No. Name
1 IN_IFA
I/O Type
input
Functional Schematic
VCC
2.2k 3.1k
3.1k
IN_IFA
1
Description
IF amplifier input, approx.
2 kΩ single-ended
140µA
VEE
2 VCC_IF supply
positive supply of LNA, MIX,
IFA, FSK Demodulator, PA,
OA1 and OA2
3
4
8
5
PRELIMINARY ^{IN_DEM analogI/O}
INT2
output
OUT_DTA output
INT1
input
VCC
77k
IN_DEM
3
INT2
4
1.5p
10µA
VEE
VCC
100µA
8
OUT_DTA
VCC
VEE
VCC
bias
IF amplifier output and de-
modulator input, connection
to external ceramic discrimi-
nator
integrator output OA2
output OA1
inverting inputs OA1 and
OA2
INT1
OA2
OUT_DEM
5
6 OUT_DEM analog I/O VEE
200k
VCC
6
VEE
demodulator output and non-
inverting input OA1
+
OA1
7 RSSI
output
VEE
VCC
VCC
RSSI output
5µA
RSSI
120
7
3901007121
Rev. 001
VEE
5µA
VEE
Page 4 of 28
Data Sheet
Jan. 2002