isd5008 Winbond Electronics Corp America, isd5008 Datasheet - Page 9

• Manufacturer Part Number: isd5008
• Description: Single-chip, Voice Record / Playback Device 4-, 5-, 6- And 8-second Duration
• Manufacturer: Winbond Electronics Corp America

AUX IN
The AUX IN is an additional audio input to the
ISD5008, such as from the microphone circuit in a
mobile phone “car kit.” This input has a nominal
700 mVp-p level at its minimum gain setting
(0 dB). See Table 5. Additional gain is available in
3 dB steps (controlled by the SPI bus) up to 9 dB.
1.
2.
3.
4.
ISD
Setting
Gain from AUX IN to ANA OUT
Gain from AUX IN to ARRAY IN
0TLP Input is the reference Transmission Level Point that is used for testing. This level is typically 3 dB below clipping.
Differential
0 dB
3 dB
6 dB
9 dB
(1)
(Auxiliary Input)
0TLP Input
V
.694
.491
.347
.245
PP
(3)
Table 5: AUXIN Amplifier Gain Settings
Figure 3: AUX IN Input Modes
AXG1
0
0
1
1
CFG0
AXG0
0
1
0
1
Setting
Gain
00
01
10
11
Resistor Ratio
Gain
1.00
1.41
2.00
2.82
40.1/40.1
47.0/33.2
53.5/26.7
59.2/21
(Rb/Ra)
(2)
Array In/Out
.694
.694
.694
.694
V
1.414
PP
2.82
Gain
1.0
2.0
ISD5008 Product
Ana Out V
Gain
(dB)
0
3
6
9
.694
.694
.694
.694
PP
(4)
5