STA339BWS13TR STMicroelectronics, STA339BWS13TR Datasheet - Page 25

• Manufacturer Part Number: STA339BWS13TR
• Description: DIG AUDIO SYSTEM, 2-CH, 36POWERSSOP
• Manufacturer: STMicroelectronics

Specifications of STA339BWS13TR

• Svhc: No SVHC (15-Dec-2010)
• No. Of Pins: 36
• Operating Temperature Range: -20°C To +70°C
• Supply Voltage Max: 21.5V
• Supply Voltage Min: 4.5V
• Termination: RoHS Compliant
• Package / Case: PowerSSO
• Interface: I2C
• Interface Type: I2C
• Rohs Compliant: Yes

STA339BWS
The STA339BWS has variable interpolation (oversampling) settings such that internal
processing and FFX output rates remain consistent. The first processing block interpolates
by either 2-times or 1-time (pass-through) or provides a 2-times downsample. The
oversampling ratio of this interpolation is determined by the IR bits.
Table 12.
Thermal warning recovery bypass
Table 13.
This bit sets the behavior of the IC after a thermal warning disappears. If TWRB is enabled
the device automatically restores the normal gain and output limiting is no longer active. If it
is disabled the device keeps the output limit active until a reset is asserted or until TWRB set
to 0. This bit works in conjunction with TWAB
Thermal warning adjustment bypass
Table 14.
Bit TWAB enables automatic output limiting when a power stage thermal warning condition
persists for longer than 400ms. When the feature is active (TWAB = 0) the desired output
limiting, set through bit TWOCL (-3 dB by default) at address 0x37 in the RAM coefficients
bank, is applied. The way the limiting acts after the warning condition disappears is
controlled by bit TWRB.
32
44.1
48
88.2
96
176.4
192
5
6
Bit
Bit
Input sample rate fs (kHz)
R/W
R/W
R/W
R/W
IR bit settings as a function of input sample rate
Thermal warning recovery bypass
Thermal warning adjustment bypass
1
1
RST
RST
TWRB
TWAB
Doc ID 15276 Rev 3
Name
Name
00
00
00
01
01
10
10
IR
2-times oversampling
2-times oversampling
2-times oversampling
Pass-through
Pass-through
2-times downsampling
2-times downsampling
0: thermal warning recovery enabled
1: thermal warning recovery disabled
0: thermal warning adjustment enabled
1: thermal warning adjustment disabled
1st stage interpolation ratio
Description
Description
Register description
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