th7122 Melexis Company, th7122 Datasheet - Page 6

• Manufacturer Part Number: th7122
• Description: Transceiver - 27 To 930mhz, Fsk/fm/ask, Multi-channel Lqfp32
• Manufacturer: Melexis Company

2
39010 07122
Rev. 008
Pin No.
1
2
3
4
5
6
7
Pin Definitions and Descriptions
OUT_DEM analog I/O
INT2/PDO
IN_DEM
VCC_IF
IN_IFA
Name
RSSI
INT1
analog I/O
I/O Type
supply
output
output
input
input
INT1
5
bias
OA2
IN_DEM
IN_IFA
RSSI
3
7
1
VEE
VCC
VEE
VCC
120
INT2/PDO
Functional Schematic
4
Page 6 of 44
VCC
VCC
VEE
VEE
OA1
50
1.5p
120
90k
60k
VCC
200k
10p
10µA
VCC
VEE
2.2k
140µA
VEE
1k
+
VEE
VCC
10p
VEE
VCC
100µA
VCC
VEE
5µA
5µA
VCC
OUT_DEM
FSK/FM/ASK Transceiver
6
IF amplifier input, approx.
2 kΩ single-ended
positive supply of LNA, MIX,
IFA, FSK Demodulator, PA,
OA1 and OA2
IF amplifier output and de-
modulator input, connection
to external ceramic discrimi-
nator or LC tank
OA2 output or peak detector
output, high impedance in
transmit and idle mode
inverting inputs of OA1 and
OA2
demodulator output and
non-inverting OA1 input,
high impedance in transmit
and idle mode
RSSI output, approx. 33 kΩ
Description
27 to 930MHz
TH7122
Data Sheet
June/07