isd5100 Winbond Electronics Corp America, isd5100 Datasheet - Page 33
isd5100
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
Datasheet
1.ISD5100.pdf
(89 pages)
- Current page: 33 of 89
- Download datasheet (601Kb)
Microphone Inputs
The microphone inputs transfer the voice signal to the on-chip AGC preamplifier or directly to the ANA
OUT MUX, depending on the selected path. The direct path to the ANA OUT MUX has a gain of 6
dB so a 208 mV p-p signal across the differential microphone inputs would give 416 mV p-p across
the ANA OUT pins. The AGC circuit has a range of 45 dB in order to deliver a nominal 694 mV p-p
into the storage array from a typical electric microphone output of 2 to 20 mV p-p. The input
impedance is typically 10kΩ.
The ACAP 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; to VCCA gives minimum gain for the AGC amplifier but will cancel the AutoMute
function.
*DIFFERENTIAL PATH
7.4.6. Ana Out Description
7.4.7. Analog Inputs
AIG1
15
* FT HRU
* INP
* VOL
* FIL TO
* SUM1
* SUM2
AIG0
1 4
AIPD
13
AXG1 AXG0 AXPD
1 2
3 (AOS 2,AOS1,AOS 0)
11
1 0
AOS2
0
0
0
0
1
1
1
1
INS 0
9
AOS1
A OS2 AOS1
0
0
1
1
0
0
1
1
8
AOS
7
0
0
1
0
1
0
1
0
1
- 33 -
AOS0 A OPD
6
SOURCE
FTHRU
FILTO
SUM1
SUM2
VOL
INP
N/C
N/C
5
(AOPD)
1
OPS1
4
(1 Vp -p m a x. from AU X IN o r AR R AY)
(69 4 mVp-p ma x. fro m mi crop ho ne inp ut)
OPS0 OPA1
3
Publication Release Date: May 16, 2007
A NA OUT+
A NA OUT–
2
AOPD
ISD5100 SERIES
0
1
OPA0 VL PD
1
CONDITION
Power Up
Power Down
0
Chip Set
CFG0
Revision 1.4
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