TH71221_15 Datasheet, PDF (9/44 Pages) Melexis Microelectronic Systems – FSK/FM/ASK Transceiver

TH71221
27 to 930MHz
FSK/FM/ASK Transceiver
Pin No. Name
27 VEE_LNA
28 OUT_LNA
I/O Type
ground
output
26
IN_LNA
input
29 GAIN_LNA input
Functional Schematic
IN_LNA
26
VEE
OUT_LNA
bias
28
37
3.8k
VEE
VCC
0.8p
VEE
Description
ground of LNA and PA
LNA open-collector output,
connection to external LC
tank at RF
LNA input, single-ended
LNA gain control input
30
IN_MIX
input
GAIN_LNA
120
29
VCC
VEE
IN_MIX
30
210
LO
mixer input, approx. 200
single-ended
bias
31
VEE_IF ground
32 OUT_MIX output
VEE
VEE
OUT_MIX
32
VCC
100
VEE
ground of IFA, Demodulator,
OA1 and OA2
mixer output, approx. 330
single-ended
39010 071221
Rev. 009
Page 9 of 44
Data Sheet
Nov/15