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| 型号： | TAS5704PAPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| 封装： | GREEN, PLASTIC, HTQFP-64 |
| 文件页数： | 15/38页 |
| 文件大小： | 735K |
| 代理商： | TAS5704PAPR |
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SLOS563A – MARCH 2008 – REVISED AUGUST 2010
www.ti.com
Format Control
The digital data input format is selected via three external terminals (FORMAT0, FORMAT1, and FORMAT2).
Table 1 lists the corresponding data format for SDIN1 and SDIN2. LRCLK and SCLK are shared clocks for
SDIN1 and SDIN2. Changes to the FORMATx terminals are latched in immediately on a rising edge of RESET.
Changes to the FORMATx terminals while RESET is high are not allowed.
Table 1. Format Control
SERIAL DIGITAL DATA
FORMAT2
FORMAT1
FORMAT0
FORMAT
0
16-Bit right-justifed
0
1
18-Bit right-justified
0
1
0
20-Bit right-justified
0
1
24-Bit right-justified
1
0
16-, 24-Bit I2S
1
0
1
16-, 24-Bit left-justified
1
0
Reserved. Setting is not allowed.
1
Reserved. Setting is not allowed.
Gain Control
The gain of the DAP is selected via two external gain pins (GAIN_0 and GAIN_1). Table 2 lists the corresponding
channel gain (for ALL channels) for GAIN_0 and GAIN_1 settings. Individual channel gain is not possible.
Changes to the GAIN_x terminals are latched in immediately on a rising edge of RESET. Changes to the
GAIN_x terminals while RESET is high are not allowed.
Table 2. Gain Control
OUTPUT VOLTAGE
CHANNEL
WITH FULL SCALE
GAIN_1
GAIN_0
GAIN (dB)
INPUT (Vrms) —
BTL
0
-3
17.56
0
1
3
35.04(1)
1
0
9
70.08(1)
1
12
99.00(1)
(1)
Output clipped. See the calculation example in the Application
section.
Output Configuration Control
The PWM outputs can be remapped to allow 2-ch, 2.1-ch, and 4-ch operation. Two terminals are used for this
mapping, CONFIG_1 and CONFIG_2. Table 3 lists the output configurations that are supported. Changes to the
CONFIG_x terminals are latched in immediately on a rising edge of RESET. Changes to the CONFIG_x
terminals while RESET is high are not allowed.
Table 3. Output Configurations
CONFIG_2
CONFIG_1
OUTPUT CONFIGURATION
2-Ch Mode, BTL, AD modulation. SUB+/- is derived from the SDIN2
0
input (left channel). SUB+/- is AD modulation with SUB- equal to the
compliment of SUB+.
2-Ch Mode, BTL, BD modulation. SUB+/- is derived from the SDIN2
0
1
input (left channel), and SUB+/- is BD PWM.
2.1-Ch Mode (2xSE outputs, 1xBTL output). AD modulation. No SUB+/-
1
0
PWM output.
1
4-Ch Mode (4xSE outputs). AD modulation. No SUB+/- PWM output.
22
Copyright 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): TAS5704
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