ADAU1781 データシートの表示（PDF） - Analog Devices
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ADAU1781 Datasheet PDF : 88 Pages
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Parameter
Test Conditions/Comments
Min
Dynamic Range
−60 dB input
With A-Weighted Filter (RMS)
AVDD = 1.8 V
AVDD = 3.3 V
94
No Filter (RMS)
AVDD = 1.8 V
AVDD = 3.3 V
92
Total Harmonic Distortion + Noise −3 dBFS
AVDD = 1.8 V
AVDD = 3.3 V
Signal-to-Noise Ratio
With A-Weighted Filter (RMS)
AVDD = 1.8 V
AVDD = 3.3 V
No Filter (RMS)
AVDD = 1.8 V
AVDD = 3.3 V
Power Supply Rejection Ratio
CM capacitor = 10 μF
AVDD = 3.3 V, 100 mV p-p at 217 Hz
AVDD = 3.3 V, 100 mV p-p at 1 kHz
Gain Error
AVDD = 3.3 V
Interchannel Gain Mismatch
AVDD = 3.3 V
Offset Error
AVDD = 3.3 V
DAC TO SPEAKER OUTPUT PATH
PO = output power
Differential Full-Scale Output Voltage Scales linearly with AVDD
(0 dB)
AVDD = 1.8 V
AVDD = 3.3 V
Total Harmonic Distortion + Noise
4 Ω Load
AVDD = 1.8 V, PO = 50 mW
AVDD = 3.3 V, PO = 175 mW
8 Ω Load
AVDD = 1.8 V, PO = 50 mW
AVDD = 3.3 V, PO = 175 mW
AVDD = 3.3 V, PO = 330 mW
AVDD = 3.3 V, PO = 440 mW
Dynamic Range
−60 dB input
With A-Weighted Filter (RMS)
AVDD = 1.8 V
AVDD = 3.3 V
94
No Filter (RMS)
AVDD = 1.8 V
AVDD = 3.3 V
92
Signal-to-Noise Ratio
With A-Weighted Filter (RMS)
AVDD = 1.8 V
AVDD = 3.3 V
No Filter (RMS)
AVDD = 1.8 V
AVDD = 3.3 V
Power Supply Rejection Ratio
CM capacitor = 10 μF
AVDD = 3.3 V,100 mV p-p at 217 Hz
AVDD = 3.3 V, 100 mV p-p at 1 kHz
Differential Offset Error
AVDD = 3.3 V
Mono Mixer Mute Attenuation,
DAC to Mixer Path Muted
Mute set by Register 0x401F, Bit 0
BEEP TO SPEAKER OUTPUT PATH
PO = output power
Differential Full-Scale Output Voltage Scales linearly with AVDD
(0 dB)
AVDD = 1.8 V
AVDD = 3.3 V
Rev. 0| Page 7 of 88
ADAU1781
Typ
Max
99
103
97
100
−88
−88
99
103
97
100
−55
−63
−1
50
10
AVDD/1.65
1.1 (3.12)
2.0 (5.66)
−60
−60
−60
−60
−60
−16
100
105
98
103
100
105
98
103
−55
−55
2
−90
Unit
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
mdB
mV
V rms
V rms (V p-p)
V rms (V p-p)
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
mV
dB
AVDD/1.65
1.1 (3.12)
2.0 (5.66)
V rms
V rms (V p-p)
V rms (V p-p)
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