Rainbow Electronics ISD5216 - Manual (Page 50)

I5216 SERIES
Advanced Information
PRELIMINARY
Publication Release Date: November 30, 2001
- 50 Revision A1
AUX IN (Auxiliary Input)
The AUX IN is an additional audio input to the Winbond I5216, such as from the microphone circuit in a
mobile phone “car kit.” This input has a nominal 694 mV p-p level at its minimum gain setting (0 dB).
(See Aux In Amplifier Gain Settings Table below). Additional gain is available in 3 dB steps (controlled
by the I
2 C interface) up to 9 dB.
AUX IN INPUT MODES
AUX IN AMPLIFIER GAIN SETTINGS
CFG0 0TLP Input
V
P-P
(2)
AXG1 AXG0
Gain (1) Array
In/Out V
P-P
Speaker
Out V
P-P
(3)
0.694 0 0 1.00 0.694 0.694
0.491 0 1 1.41 0.694 0.694
0.347 1 0 2.00 0.694 0.694
0.245 1 1 2.82 0.694 0.694
1. Gain from AUX IN to ARRAY IN
2. 0TLP Input is the reference Transmission Level Point that is used for testing. This level is typically 3
dB below clipping
3. Differential
Gain
Setting
Resistor Ratio
(Rb/Ra)
Gain Gain (1)
(dB)
00 40.1 / 40.1 1.0 0
01 47.0 / 33.2 1.414 3
10 53.5 / 26.7 2.0 6
11 59.2 / 21 2.82 9
AXPD Condition
0 Power Up
1 Power Down
Internal to the device
Rb
AUX IN
Input
AUX IN
Input Amplifier