ADAU1445 Analog Devices, ADAU1445 Datasheet - Page 70

• Manufacturer Part Number: ADAU1445
• Manufacturer: Analog Devices

Specifications of ADAU1445

• Instructions/cycles: 3584
• Digital I/o Channels: 24/24
• Analog I/o Channels: 0/0
• Product Description: Digital audio processor with flexible audio routing matrix, 8 × 2-channel ASRC

ADAU1442/ADAU1445/ADAU1446
AUXILIARY ADC
The ADAU1442/ADAU1445/ADAU1446 include a 10-bit
auxiliary ADC that can be used for control input signals. There
one ADC with four multiplexed inputs. The ADC samples at
rate of f
clock), which results in an effective sampling rate of f
(48 kHz when based on a 172.032 MHz core clock) per channel.
An ADC filtering function is included in the hardware, and
hysteresis is available to reduce the effects of noise on the input.
More information on these settings is available in Table 7
The auxiliary ADC is not designed for audio and, therefore,
should not be used as an auxiliary audio input. The sample and
bit rates are too low to convert si
The input can be filtered using several methods. The specific
filtering modes can be set as described in Table 70.
CORE
/896
(192 kHz when based on a 172.032 MHz core
gnals for audio applications.
CORE
0.
/3584
is
a
Rev. C | Page 70 of 92
AUXILIARY ADC MODES AND SETTINGS
ADC
Table 69. it Descriptio
Bit Pos
[15:8]
[7:6]
[5:4]
[3:2]
[1:0]
Table 70. S
M
00
01
10
11
ode Sett
Filter Mode Register (Address 0xE224)
itio
B
n
ing
ettings of Bits[7:0], Register 0xE224
Function
Filter bypass
ADC data filtered
Filtered with 1-bit hysteresis
Filtered with 2-bit h
ns of Register 0xE224
ADC Channel
Reserved
ADC0
ADC1
ADC2
ADC3
ysteresis
Default
00