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参数资料
| 型号： | PCM3794RHBTG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 通信及网络 |
| 英文描述： | SPECIALTY TELECOM CIRCUIT, PQCC32 |
| 封装： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件页数： | 45/67页 |
| 文件大小： | 1417K |
| 代理商： | PCM3794RHBTG4 |
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www.ti.com
SLES193C – AUGUST 2006 – REVISED FEBRUARY 2007
ELECTRICAL CHARACTERISTICS (continued)
All specifications at T
A = 25°C, VDD = VIO = VCC = VPA = 3.3 V, fS = 48 kHz, system clock = 256 fS, and 16-bit data (unless
otherwise noted).
PCM3793RHB, PCM3794RHB
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
Line Input to Digital Output Through ADC (AIN1L/R, AIN2L/R, AIN3L, and AIN3L/R)
ALC = OFF, microphone boost = 0 dB, PGA = 0 dB, speaker and headphone = powered down, analog mixing = disabled
DYNAMIC PERFORMANCE
2.828
Vp-p
Full-scale input voltage
0 dB
1
Vrms
Dynamic range
EIAJ, A-weighted
90
dB
SNR
Signal-to-noise ratio
EIAJ, A-weighted
83
90
dB
Channel separation
87
dB
THD+N
Total harmonic distortion + noise
–1 dB
0.009%
ANALOG INPUT
Center voltage
0.5 VCC
V
Input impedance
10
20
k
Microphone Bias
ALC = OFF, microphone boost = 0 dB, PGA = 0 dB, speaker and headphone = powered down, analog mixing = disabled
Bias voltage
0.75 VCC
V
Bias source current
2
mA
Output noise
14
V
Filter Characteristics
INTERPOLATION FILTER FOR DAC
Pass band
0.454 fS
Stop band
0.546 fS
Pass-band ripple
±0.04
dB
Stop-band attenuation
–50
dB
Group delay
19/fs
s
De-emphasis error
±0.1
dB
ANALOG FILTER FOR DAC
Frequency response
f = 20 kHz
±0.2
dB
DECIMATION FILTER FOR ADC
Pass band
0.408 fS
Stop band
0.591 fS
Pass-band ripple
±0.02
dB
Stop-band attenuation
f < 3.268 fS
–60
dB
Group delay
17/fS
s
HIGH-PASS FILTER FOR ADC
–3 dB, fc = 4 Hz
3.74
–0.5 dB, fc = 4 Hz
10.66
–0.1 dB, fc = 4 Hz
24.2
Frequency response
Hz
–3 dB, fc = 240 Hz
235.68
–0.5 dB, fc = 240 Hz
609.95
–0.1 dB, fc = 240 Hz
2601.2
5
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