Specifications

Bluegiga Technologies Oy
Page 36 of 64
9.1.2 DAC
The DAC consists of two second-order sigma-delta converters and gain stages. The gain stage consists of
digital and analog gain stages which are controlled by iWRAP. The optimal combination of digital and analog
gain is automatically selected by iWRAP. The analog gain stage consist selectable 24 dB preamplifier for
selecting microphone or line input levels and an amplifier which can be configured in 3 dB steps. The iWRAP
gain selection values are shown in Table 20.
Following sample rates are supported
 8kHz
 11.025kHz
 16kHz
 22.05kHz
 24kHz
 32kHz
 44.1kHz
 48kHz
Gain Setting In iWRAP
DAC Gain (dB)
0
-42
1
-39
2
-36
3
-33
4
-30
5
-27
6
-24
7
-21
8
-18
9
-15
A
-12
B
-9
C
-6
D
-3
E
0
F
3
10
6
11
9
12
12
13
15
14
18
15
21
16
24
Table 20: DAC gain selection in iWRAP
iWRAP Example: Setting output with 0 dB gain
”SET CONTROL GAIN x E” (x is the ADC gain)