ISD5116 Datasheet, PDF (35/57 Pages) Winbond – Single-Chip Voice Record/Playback Device Up to 16-Minute Duration with Digital Storage Capability

AUX OUT (Auxiliary Output)
The AUX OUT is an additional audio output pin to be used, for example, to drive the speaker circuit in a
“car kit.” It drives a minimum load of 5 kΩ and up to a maximum of 1 V p-p. The AC signal is
superimposed on approximately 1.2 VDC bias and must be capacitively coupled to the load.
OUTPUT
MUX
VO L
Car Kit
AUX OUT (1 Vp-p Max)
ANA IN AMP
FILTO
SUM2
SP+
SP–
2
(OPA1, OPA0)
Speak er
2
( OPS1,O PS0)
OPS1
0
0
1
1
OPS0
0
1
0
1
SOURCE
VOL
ANA IN
FILTO
SUM2
OPS1
0
0
1
1
OPA0
0
1
0
1
SPKR DRIVE
Power Down
3.6 Vp.p @150Ω
23.5 mWatt @ 8Ω
Power Down
15 14 13 12 11 10 9
87
65
43
21
0
AIG1 AIG0 AIPD AXG1 AXG0 AXPD INS0 AOS2 AOS1 AOS 0 AOPD OPS1 OPS0 OPA1 OPA0 VLPD _CFG0
AUX OUT
Power Down
Power Down
Power Down
1 Vp.p Max @ 5KΩ
ANA IN (Analog Input)
The ANA IN pin is the analog input from the telephone chip set. It can be switched (by the I²C interface) to
the speaker output, the array input or to various other paths. This pin is designed to accept a nominal
1.11 V p-p when at its minimum gain (6 dB) setting. There is additional gain available, if required, in 3 dB
steps, up to 15 dB. The gain settings are controlled from the I²C interface.
ANA IN Input Modes
Gain
Setting
00
01
10
11
Resistor Ratio
(Rb/Ra)
63.9 / 102
77.9 / 88.1
92.3 / 73.8
106 / 60
Gain
0.625
0.88
1.25
1.77
Gain²
(dB)
-4.1
-1.1
1.9
4.9
October 2000
Page 34