Datasheet

Onboard Chip
C
AUXR
C
AUXR.M
AUXR
037-008
DigitalPGA
gain=0to31dB
Amp
0to30dB
ADC
037-050
TPS65930/TPS65920
www.ti.com SWCS037G–MAY 2008–REVISED APRIL 2011
6.2.2 FM Radio/Auxiliary Input
The auxiliary input AUXR/FMR can be used as FM radio input. The amplification stage output is
connected to the ADC input. The FM radio input can also be output through an audio output stage.
6.2.2.1 External Components
Figure 6-9 shows the external components on the auxiliary input.
Figure 6-9. Audio Auxiliary Input
NOTE
For other component values, see Table 14-1.
6.2.3 Uplink Characteristics
Figure 6-10 shows the uplink amplifier. Table 6-10 lists the uplink characteristics.
Figure 6-10. Uplink Amplifier
Table 6-10. Uplink Characteristics
Parameter Test Conditions Min Typ Max Unit
Speech delay Voice path 0.5 ms
Gain range
(1)
0 61 dB
Absolute gain 0 dBFs at 1.02 kHz –1 1 dB
Peak-to-peak differential input voltage (0 dBFs) For differential input 1.5 V
PP
0 dB gain setting
(1) Gain range is defined by: Preamplifier = 0 to 30 dB; Filter = 0 to 31 dB (1-dB steps)
Copyright © 2008–2011, Texas Instruments Incorporated Audio/Voice Module (TPS65930 Device Only) 65
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