µPB1008K
Pin
Pin Name
No.
Function and Application
24
DCoffsetlb DC offset compensation pin for
l-bar arm. A low pass capacitor
shunt to pin 25 is required.
25
DCoffsetl
DC offset compensation pin for
I-bar arm. A low pass capacitor
shunt to pin 24 is required.
26
2ndIFout-Ib Differential output pins of
quadrature demodulator I
27
2ndIFout-I
output. Adding a lowpass shunt
capacitor between these pins
will define the IF bandwidth.
28
VCCanalog
Supply voltage pin of analog
portion of the chip.
Internal Equivalent Circuit
See pin 16 & 17 schematic
See pin 14 & 15 schematic
28
29
VAGC
Gain control voltage pin of IF
amplifier. This voltage performs
reverse control, (i.e., VAGC up →
gain down). If this pin is left
open, then it is default at
maximum gain.
30
IF-in1
Differential input pins of 1stIF
AGC amplifier.
31
IF-in2
ESD
29
ESD
300 Ω
44 kΩ
To AGC Amp
3 kΩ
32
28
4 kΩ
2 kΩ 2 kΩ
4 kΩ
32
GNDanalog
Ground pin of analog portion of
the chip.
Regulator
ESD 4 kΩ
30
40 Ω
4 kΩ
ESD
1.42 kΩ
1.42 kΩ
32
ESD
31
ESD
Data Sheet PU10282EJ01V0DS
7