DA9191A.000
July 31, 1997
PIN CONFIGURATION
AGND
1
2
VREF
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
TX
DEOUT
RBPFIN
RBPFOUT
VSAR
TAUDOUT
TAUDIN
LPFIN
3
4
5
VSAT
6
VDAR
VDAT
7
EXPIN
TXACCIN
TXACCOUT
PREIN
8
EAMPOUT
EWCIN
EXPOUT
RXACCIN
RXACCOUT
RAUDIN
EST
9
10
11
12
13
14
15
16
COUT
CAMP2I
CWCIN
CAMP20
COMPIN
MICOUT
STGT
EINR
TQFP64 package
PIN DESCRIPTION
Pin name
Pin
Type
Function
AGND
1
AO
Signal ground. The signal ground is generated internally and is equal to
VDD/2. The analog ground needs an external capacitor connected to
system ground.
TX
2
AO
Transmitted data signal output. Connect this output through a 22nF
capacitor to the transmitter.
TAUDOUT
TAUDIN
3
4
AO
AI
TX audio output from the TX audio block..
TX audio input. The input for the TX audio signal, normally connected
through a 22nF capacitor to TAUDOUT
Input for TX limiter, lowpass filter or GC6 depending on the position of
switches S15 and S16. The pin is normally left unconnected.
Ground for TX. Connect to system ground.
LPFIN
5
AI
VSAT
VDAT
6
7
G
P
Power supply for TX block. Use a bypass capacitor between pins VSAT
and VDAT.
TXACCIN
8
AI
TX block extra Op Amp input. See application note in the APPLICATIONS
section.
TXACCOUT
PREIN
9
10
AO
AI
TX block Op Amp output.
Pre-emphasis filter input. Filter has a +6dB/octave (±1dB) frequency
response in the range 300Hz...3kHz.
Compressor output signal. The compression ratio is 2:1
COUT
11
AO
2
MAS [ MICRO ANALOG SYSTEMS ]
