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TH71112
868/915MHz
FSK/ASK Receiver
2
Pin Definitions and Descriptions
Pin No.
3
Name
OUT_LNA
I/O Type
analog
Functional Schematic
OUT_LNA
Description
LNA open-collector output,
output
3
to be connected to external
LC tank that resonates at
RF
31
1
IN_LNA
VEE_LNAC
analog
input
ground
IN_LNA
31
5k
VEE_LNAC
1
LNA input, approx.
26 ? single-ended
ground of LNA core (cas-
code)
2
4
GAIN_LNA
IN_MIX1
analog
input
analog
input
GAIN_LNA
2
400 ?
13 ?
LNA gain control
(input with hysteresis)
RX standby: no pull-up
RX active: pull-up
MIX1 input, approx. 33 ?
single-ended
IN_MIX1
4
13 ?
500μA
5
VEE_MIX
ground
ground of MIX1 and MIX2
6
IF1P
analog I/O
VCC
open-collector output, to be
7
IF1N
analog I/O
IF1P
6
20p
20p
IF1N
7
connected to external LC
tank that resonates at first IF
open-collector output, to be
connected to external LC
VEE
2x500μA
VEE
tank that resonates at first IF
8
VCC_MIX
supply
positive supply of
MIX1 and MIX2
9
OUT_MIX2
analog
output
OUT_MIX2
130 ?
6.8k
MIX2 output, approx. 330 ?
output impedance
9
230μA
10
VEE_IF
ground
ground of IFA and DEMOD
39010 71112
Rev. 016
Page 6 of 20
Data Sheet
Jun/12
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