TH7121 Datasheet, PDF (6/28 Pages) List of Unclassifed Manufacturers – 300 to 930MHz FSK/FM/ASK Transceiver

TH7121
300 to 930MHz
FSK/FM/ASK Transceiver
Pin No. Name I/O Type
21 LF
analog I/O
Functional Schematic
VCC
LF
120
21
Description
charge pump output, con-
nection to external loop filter
23 TNK_LO analog I/O
TNK_LO
23
VCC
VCO open-collector output,
connection to external LC
tank
VEE
24
25
PRELIMINARY ³³
33
PS_PA analog I/O
VEE
VCC
VCC
power-setting input
OUT_PA output
PS_PA
120
24
VEE
OUT_PA
25
VEE
VCC
power amplifier open-
collector output
VEE
VEE
27 VEE_LNA ground
ground of LNA and PA
28 OUT_LNA output
OUT_LNA
LNA open-collector output,
connection to external LC
bias
28
tank at RF
26 IN_LNA input
IN_LNA
26
37
3.8k
VEE
40p
LNA input,
approx. 50Ω single-ended
29 GAIN_LNA input
VEE
VCC
LNA gain control input
GAIN_LNA
29
120
VEE
3901007121
Rev. 001
Page 6 of 28
Data Sheet
Jan. 2002