参数资料
型号: TAS3004PFBRG4
厂商: TEXAS INSTRUMENTS INC
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP48
封装: GREEN, PLASTIC, TQFP-48
文件页数: 19/84页
文件大小: 671K
代理商: TAS3004PFBRG4
3–1
3 Analog Input/Output
The TAS3004 device contains a stereo 24-bit ADC with two single-ended inputs per channel. Selection of the A or
B analog input is accomplished by setting a bit in the analog control register (ACR) by an I2C command. Additionally,
the TAS3004 device has a stereo 24-bit digital-to-analog converter (DAC).
3.1
Analog Input
Figure 3–1 shows the technique and components required for analog input to the TAS3004 device. The maximum
input signal must not exceed 0.7 Vrms. Selection of the above component values gives a frequency response from
20 Hz to 20 kHz at a sampling frequency of 48 kHz without alias frequency problems.
AINRP
AINRM
AINLM
AINLP
24-Bit
Stereo
ADC
RINA
RINB
AINRM
AINRP
AINLM
AINLP
LINA
LINB
Reference
Voltage
1200 pF
0.47
F
0.47
F
1
0.47
F
0.47
F
1
2
1
Analog Inputs – Use 0.47
F for 20-Hz Cutoff
2
Anti-Alias Capacitors for fS = 48 kHz
Input Select Command
From Internal Controller
3
Tie unused analog inputs to analog ground through 0.1-
F capacitors.
Figure 3–1. Analog Input to the TAS3004 Device
3.2
Analog Output
3.2.1
Analog Output
The full scale analog output from the TAS3004 device is 0.7 Vrms. It is referenced to VCOM which is approximately
1.5 Vdc. VCOM must be decoupled with the network as shown in Figure 3–2.
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