TH71111
868/915MHz
FSK/FM/ASK Receiver
2
3
Pin Definitions and Descriptions
Name
OUT_LNA
I/O Type
analog
output
5k
Pin No.
Functional Schematic
OUT_LNA
3
Description
LNA open-collector output,
to be connected to external
LC tank that resonates at
RF
LNA input, approx.
26Ω single-ended
ground of LNA core (cas-
code)
LNA gain control
(input with hysteresis)
31
1
2
IN_LNA
VEE_LNAC
GAIN_LNA
analog
input
ground
analog
input
IN_LNA
31
VEE_LNAC
1
GAIN_LNA
2
400
Ω
RX standby: no pull-up
RX active: pull-up
MIX1 input, approx. 33Ω
single-ended
4
IN_MIX1
analog
input
IN_MIX1
4
13
Ω
13
Ω
500µA
5
6
VEE_MIX
IF1P
ground
analog I/O
IF1P
6
20p
VCC
20p
ground of MIX1 and MIX2
open-collector output, to be
connected to external LC
tank that resonates at first IF
open-collector output, to be
connected to external LC
tank that resonates at first IF
VEE
IF1N
7
7
IF1N
analog I/O
2x500µA
VEE
8
9
VCC_MIX
OUT_MIX2
supply
analog
output
OUT_MIX2
9
230µA
130
Ω
positive supply of
MIX1 and MIX2
6.8k
MIX2 output, approx. 330Ω
output impedance
10
VEE_IF
ground
ground of IFA and DEMOD
39010 71111
Rev. 013
Page 6 of 22
Data Sheet
June/07
MELEXIS [ Melexis Microelectronic Systems ]
