Pin Descriptions and Equivalent Circuits (cont)
Pin No. Symbol Equivalent Circuit
40
RS2
HA12188AF
Function
RS2 switch
41
RFM
5k
5k
42
PVCC
—
43
RF1
44
RF2
45
VC
46
MD
10 k
20 k
47
LD
150 k
1k
48
TR1
49
TR2
80 k
20 k 16 k
3.6 p
32 k
RFS amplifier inverting input
Pre-amplifier power supply
RF1 amplifier input
RF2 amplifier input
Voltage reference output
APC amplifier input
APC amplifier output
TR1 amplifier input
TR2 amplifier input
Rev.1, Oct. 1995, page 7 of 35