ISD5008 Datasheet, PDF(7/47 Page) List of Unclassifed Manufacturers – SINGLE CHIP VOICE RECORD PLAYBACK DEVICE 4-, 5-, 6-, AND 8- MINUTE DURATIONS

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ISD5008 Datasheet, PDF (7/47 Pages) List of Unclassifed Manufacturers – SINGLE CHIP VOICE RECORD PLAYBACK DEVICE 4-, 5-, 6-, AND 8- MINUTE DURATIONS

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ISD5008 Product

ANA IN (Analog Input)

The ANA IN pin is the analog input from the tele-

phone chip set. It can be switched (by the SPI bus)

to the speaker output, the array input or to various

other paths. This pin is designed to accept a nom-

inal 1.11 Vp-p when at its minimum gain (6 dB)

setting. There is additional gain available in 3 dB

steps controlled from the SPI bus, if required, up to

15 dB.

Figure 2: ANA IN Input Modes

Gain Resistor Ratio

Setting

(Rb/Ra)

63.9/102

77.9/88.1

92.3/73.8

106/60

Gain

Gain2

(dB)

0.625 â4.1

0.88 â1.1

1.25 1.9

1.77 4.9

Setting(1)

Table 4: ANA IN Amplifier Gain Settings

0TLP Input

VPP(3)

CFG0

AIG1

AIG0

Gain(2)

Array In/Out Speaker Out

VPP

VPP(4)

6 dB

1.11

9 dB

.785

12 dB

.555

15 dB

.393

.625

.694

2.22

.883

.694

2.22

1.250

.694

2.22

1.767

.694

2.22

1. Gain from ANA IN to SP+/â

2. Gain from ANA IN to ARRAY IN

3. 0TLP Input is the reference Transmission Level Point that is used for testing. This level is typically 3 dB below clipping.

4. Speaker Out gain set to 1.6 (High). (Differential)

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