參數(shù)資料
型號： EVAL-ADAU1781Z
廠商： Analog Devices Inc
文件頁數(shù)： 45/92頁
文件大?。?/td> 0K
描述： BOARD EVAL FOR ADAU1781
標(biāo)準(zhǔn)包裝： 1
系列： SigmaDSP®
主要目的： 音頻編解碼器
嵌入式： 是，DSP
已用 IC / 零件： ADAU1781
主要屬性： 立體聲，24 位，8 ~ 96 kHz 采樣率，GUI 工具
次要屬性： *
已供物品： *
ADAU1781
Rev. B| Page 5 of 92
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
Left/Right Microphone PGA Gain
Range
AVDD = 3.3 V
0
32
dB
Left/Right Microphone PGA Mute
Attenuation
AVDD = 3.3 V; mute set by Register
0x400E, Bit 1, and Register 0x400F, Bit 1
98
dB
Interchannel Gain Mismatch
AVDD = 3.3 V
50
mdB
Offset Error
AVDD = 3.3 V
0.25
mV
Gain Error
AVDD = 3.3 V
1
%
Interchannel Isolation
AVDD = 3.3 V
98
dB
Power Supply Rejection Ratio
CM capacitor = 10 μF
AVDD = 3.3 V, 100 mV p-p at 217 Hz
55
dB
AVDD = 3.3 V, 100 mV p-p at 1 kHz
55
dB
DIFFERENTIAL MICROPHONE INPUT TO
ADC PATH
Full-Scale Input Voltage (0 dB)
Scales linearly with AVDD
AVDD/3.3
V rms
AVDD = 1.8 V
0.55 (1.56)
V rms (V p-p)
AVDD = 3.3 V
1.0 (2.83)
V rms (V p-p)
Dynamic Range
60 dB input
With A-Weighted Filter (RMS)
AVDD = 1.8 V
96
dB
AVDD = 3.3 V
94
99.2
dB
No Filter (RMS)
AVDD = 1.8 V
92
dB
AVDD = 3.3 V
92
96.5
dB
Total Harmonic Distortion + Noise
3 dBFS
AVDD = 1.8 V
84
dB
AVDD = 3.3 V
85
dB
Signal-to-Noise Ratio
With A-Weighted Filter (RMS)
AVDD = 1.8 V
96
dB
AVDD = 3.3 V
100
dB
No Filter (RMS)
AVDD = 1.8 V
92
dB
AVDD = 3.3 V
97
dB
Left/Right Microphone PGA Mute
Attenuation
AVDD = 3.3 V; mute set by Register
0x400E, Bit 1, and Register 0x400F, Bit 1
98
dB
Interchannel Gain Mismatch
AVDD = 3.3 V
50
mdB
Offset Error
AVDD = 3.3 V
0.25
mV
Gain Error
AVDD = 3.3 V
1
%
Interchannel Isolation
AVDD = 3.3 V
85
dB
Common-Mode Rejection Ratio
AVDD = 3.3 V, 100 mV rms, 1 kHz
60
dB
AVDD = 3.3 V, 100 mV rms, 20 kHz
45
dB
BEEP TO LINE OUTPUT PATH
Full-Scale Input Voltage (0 dB)
Scales linearly with AVDD
AVDD/3.3
V rms
AVDD = 1.8 V
0.55 (1.56)
V rms (V p-p)
AVDD = 3.3 V
1.0 (2.83)
V rms (V p-p)
Total Harmonic Distortion + Noise
3 dBFS input, measured at AOUTL pin,
beep gain set to 0 dB
AVDD = 1.8 V
88
dB
AVDD = 3.3 V
88
dB
Signal-to-Noise Ratio
With A-Weighted Filter (RMS)
AVDD = 1.8 V
99
dB
AVDD = 3.3 V
105
dB
No Filter (RMS)
AVDD = 1.8 V
96
dB
AVDD = 3.3 V
102
dB
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