Datasheet

TLV320AIC1110

SLAS359 – DECEMBER 2001

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PRINCIPLES OF OPERATION

receive operation

receive channel gain control

The values in the receive PGA control registers control the gain in the receive path. PGA gain is set from

– 6 dB to 6 dB in 1-dB steps through the I

C interface. The default receive channel gain is –4 dB.

Table 3. Receive PGA Gain Control

BIT NAME RELATIVE GAIN, VOICE MODE

DTMF GAIN TONE NODE

RP3 RP2 RP1 RP0 MIN TYP MAX UNIT

DTMF GAIN, TONE NODE

0 0 0 0 5.8 6 6.2 dB 12

0 0 0 1 4.8 5 5.2 dB 12

0 0 1 0 3.8 4 4.2 dB 12

0 0 1 1 2.8 3 3.2 dB 6

0 1 0 0 1.8 2 2.2 dB 6

0 1 0 1 0.8 1 1.2 dB 6

0 1 1 0 –0.2 0 0.2 dB 0

0 1 1 1 –1.2 –1 –0.8 dB 0

1 0 0 0 –2.2 –2 –1.8 dB 0

1 0 0 1 –3.2 –3 –2.8 dB –6

1 0 1 0 –4.2 –4 –3.8 dB –6

1 0 1 1 –5.2 –5 –4.8 dB –6

1 1 0 0 –6.2 –6 –5.8 dB –12

1 1 0 1 X dB –12

1 1 1 0 X dB –12

sidetone gain control

The values in the sidetone PGA control registers control the sidetone gain. Sidetone gain is set from –12 dB

to –24 dB in 2-dB steps through the I

C interface. Sidetone can be muted by setting bit 7 of the power control

Table 4. Sidetone Gain Control

BIT NAME RELATIVE GAIN

ST2 ST1 ST0 MIN TYP MAX UNIT

0 0 0 –12.2 –12 –11.8 dB

0 0 1 –14.2 –14 –13.8 dB

0 1 0 –16.2 –16 –15.8 dB

0 1 1 –18.2 –18 –17.8 dB

1 0 0 –20.2 –20 –19.8 dB

1 0 1 –22.2 –22 –21.8 dB

1 1 0 –24.2 –24 –23.8 dB