ADAU1445YSVZ-3A-RL Analog Devices Inc, ADAU1445YSVZ-3A-RL Datasheet - Page 47

• Manufacturer Part Number: ADAU1445YSVZ-3A-RL
• Description: 175MHZ SigmaDSP,2x8 SRCs
• Manufacturer: Analog Devices Inc
• Series: SigmaDSP®r
• Type: Audio Processorr

Specifications of ADAU1445YSVZ-3A-RL

• Applications: Automotive Audio
• Mounting Type: Surface Mount
• Package / Case: 100-TQFP Exposed Pad, 100-eTQFP, 100-HTQFP, 100-VQFP
• Format: Fixed Point
• Program Memory Size: Not RequiredKB
• Operating Supply Voltage (typ): 1.8/3.3V
• Operating Temp Range: -40C to 105C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Stereo ASRC Routing Overview
Within the ADAU1445, signals are required to be synchronous
to the master clock only when they are within the DSP core itself.
At all other times, signals can be asynchronous to one another and
the core. This is illustrated in Figure 42. Because the ADAU1446
has no ASRCs, all audio signals must be synchronous at all times.
The stereo ASRCs allow asynchronous signals to be converted
for processing in the DSP.
The input to an ASRC can come from one of 21 sources: the
12 input channel pairs, the S/PDIF Rx pair, or the eight DSP-to-
ASRC pairs. This allows the ASRCs to be placed both before
and after the DSP. Figure 43 and Figure 44 show examples of
how the ASRCs can be used both before and after the DSP.
ASYNCHRONOUS
Figure 42. Synchronous and Asynchronous Zones of the ADAU1445
Rev. A | Page 47 of 92
SYNCHRONOUS
FROM SERIAL
INPUT PORTS
S/PDIF Rx
FROM
10, 11
12, 13
14, 15
16, 17
18, 19
20, 21
22, 23
0, 1
2, 3
4, 5
6, 7
8, 9
FARM
FROM DSP
Figure 41. Stereo ASRC Routing
10, 11
12, 13
14, 15
0, 1
2, 3
4, 5
6, 7
8, 9
ADAU1445/ADAU1446
(8 × 2 CH)
STEREO
ASYNCHRONOUS
ASRCs
0, 1
2, 3
4, 5
6, 7
8, 9
10, 11
12, 13
14, 15
TO DSP
8
RATE
TO FARM
(OUTPUT SIDE)