STA328 STMicroelectronics, STA328 Datasheet - Page 21

• Manufacturer Part Number: STA328
• Description: DIG AUDIO SYSTEM, 2-CH, 36POWERSSOP
• Manufacturer: STMicroelectronics

Specifications of STA328

• Svhc: No SVHC (15-Dec-2010)
• Package / Case: PowerSO
• Interface: I2C
• No. Of Pins: 36
• Operating Temperature Range: -20°C To +125°C
• Supply Voltage Max: 36V
• Supply Voltage Min: 10V
• Termination: RoHS Compliant
• Interface Type: I2C
• Rohs Compliant: Yes

STA328
bits determine the PLL factor generating the internal clock and the IR bit determines the
oversampling ratio used internally.
Table 11.
Table 12.
The STA328 has variable interpolation (re-sampling) settings such that internal processing
and DDX
times or 1 time (pass-through) or provides a down-sample by a factor of 2.
The IR bits determine the re-sampling ratio of this interpolation.
Table 13.
Table 14.
If the thermal warning adjustment is enabled (TWAB = 0), then the thermal warning
recovery will determine if the adjustment is removed when thermal warning is negative. If
TWRB = 0 and TWAB = 0, then when a thermal warning disappears the gain adjustment
determined by the thermal warning post-scale (default = -3 dB) will be removed and the gain
will be added back to the system. If TWRB = 1 and TWAB = 0, then when a thermal warning
disappears the thermal warning post-scale gain adjustment will remain until TWRB is
changed to zero or the device is reset.
32, 44.1, 48
88.2, 96
176.4, 192
4:3
32
44.1
48
88.2
96
176.4
192
5
Input sample rate fs (kHz)
Bit
Bit
Input sample rate
RW
R/W
RW
fs (kHz)
R/W
®
output rates remain consistent. The first processing block interpolates by either 2
IR and MCS settings for input sample rate and clock rate
Interpolation ratio select
IR bit settings as a function of input sample rate
Thermal warning recovery bypass
1
RST
00
RST
TWRB
IR[1:0]
Name
Name
00
01
1X
IR
00
00
00
01
01
10
10
IR[1,0]
000
768 fs
384 fs
384 fs
Thermal warning recovery bypass:
0: thermal warning recovery enabled
1: thermal warning recovery disabled
Interpolation ratio select: selects internal interpolation ratio
based on input
2 times over-sampling
2 times over-sampling
2 times over-sampling
Pass-through
Pass-through
Down-sampling by 2
Down-sampling by 2
001
512 fs
256 fs
256 fs
I
2
S
sample frequency
010
384 fs
192 fs
192 fs
1
st
stage interpolation ratio
Description
Description
MCS[2:0]
011
256 fs
128 fs
128 fs
Register description
100
128 fs
64 fs
64 fs
101
576 fs
x
x
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