th71112 Melexis Company, th71112 Datasheet - Page 6

• Manufacturer Part Number: th71112
• Description: Receiver - 868/915mhz Fsk/ask, Double-conversion Superhet Lqfp32
• Manufacturer: Melexis Company

2
39010 71112
Rev. 014
Pin No.
31
10
3
1
2
4
5
6
7
8
9
Pin Definitions and Descriptions
OUT_LNA
IN_LNA
VEE_LNAC ground
GAIN_LNA
IN_MIX1
VEE_MIX
IF1P
IF1N
VCC_MIX
OUT_MIX2
VEE_IF
Name
analog
output
analog
input
analog
input
input
analog I/O
supply
analog
output
analog
ground
analog I/O
ground
I/O Type
IF1P
IN_LNA
6
OUT_MIX2
31
GAIN_LNA
IN_MIX1
9
4
2
Functional Schematic
VEE
Page 6 of 22
20p
5k
2x500µA
130
400
VCC
Ω
Ω
13
13
20p
Ω
Ω
230µA
OUT_LNA
VEE_LNAC
VEE
500µA
6.8k
3
1
IF1N
7
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)
RX standby: no pull-up
RX active: pull-up
MIX1 input, approx. 33Ω
single-ended
ground of MIX1 and MIX2
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
positive supply of
MIX1 and MIX2
MIX2 output, approx. 330Ω
output impedance
ground of IFA and DEMOD
open-collector output, to be
FSK/ASK Receiver
TH71112
Description
868/915MHz
Data Sheet
April/08