isd5100 Winbond Electronics Corp America, isd5100 Datasheet - Page 51

• Manufacturer Part Number: isd5100
• Description: Single-chip 1 To 16 Minutes Duration Voice Record/playback Devices With Digital Storage Capability
• Manufacturer: Winbond Electronics Corp America

OPS1
ACAP (AGC Capacitor)
This pin provides the capacitor connection for setting the parameters of the microphone AGC circuit. It
should have a 4.7 µF capacitor connected to ground. It cannot be left floating. This is because the
capacitor is also used in the playback mode for the AutoMute circuit. This circuit reduces the amount
of noise present in the output during quiet pauses. Tying this pin to ground gives maximum gain; tying
it to V
SP +, SP- (Speaker +/-)
This is the speaker differential output circuit. It is designed to drive an 8Ω speaker connected across
the speaker pins up to a maximum of 23.5 mW RMS power. This stage has two selectable gains, 1.32
and 1.6, which can be chosen through the configuration registers. These pins are biased to ap-
proximately 1.2 VDC and, if used single-ended, must be capacitively coupled to their load. Do NOT
ground the unused pin.
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 5kΩ and up to a maximum of 1V p-p. The AC signal is
superimposed on approximately 1.2 VDC bias and must be capacitively coupled to the load.
0
0
1
1
AIG1
1 5
CCA
1 4
AIG0 A IPD
OPS0
gives minimum gain for the AGC amplifier but cancels the AutoMute function.
0
1
0
1
1 3
AXG1 AXG0 A XPD
ANA IN AMP
1 2
VOL
FIL TO
SUM2
SOURCE
VOL
ANA IN
FILTO
SUM2
1 1
1 0
OUTPUT
MUX
(OPS1,O PS0)
INS0
2
9
AOS2 A OS1 AOS0 AOPD
8
7
6
5
- 51 -
(OPA1, OPA0)
2
OPS1 OPS0
4
3
OPA1
AUX OUT
SP+
SP–
OPA 1 OPA0
2
0
0
1
1
Publication Release Date: May 16, 2007
1
OPA0
Car Kit
(1 Vp -p Max)
Speaker
VLPD
0
0
1
0
1
ISD5100 SERIES
CFG0
SPKR DRIVE
23.5 mWatt @ 8
3.6 V
Power Down
Power Down
p.p
@150
Revision 1.4
Ω
Ω
AUX OUT
Power Down
Power Down
Power Down
1 V
p.p
Max @ 5K
Ω