ADAU1381 Datasheet, PDF (5/84 Pages) Analog Devices – Low Noise Stereo Codec with Enhanced Recording and Playback Processing

Parameter
Left/Right Microphone PGA Gain
Range
Left/Right Microphone PGA Mute
Attenuation
Interchannel Gain Mismatch
Offset Error
Gain Error
Interchannel Isolation
Power Supply Rejection Ratio
DIFFERENTIAL MICROPHONE INPUT TO
ADC PATH
Full-Scale Input Voltage (0 dB)
Dynamic Range
With A-Weighted Filter (RMS)
No Filter (RMS)
Total Harmonic Distortion + Noise
Signal-to-Noise Ratio
With A-Weighted Filter (RMS)
No Filter (RMS)
Left/Right Microphone PGA Mute
Attenuation
Interchannel Gain Mismatch
Offset Error
Gain Error
Interchannel Isolation
Common-Mode Rejection Ratio
BEEP TO LINE OUTPUT PATH
Full-Scale Input Voltage (0 dB)
Total Harmonic Distortion + Noise
Signal-to-Noise Ratio
With A-Weighted Filter (RMS)
No Filter (RMS)
Test Conditions/Comments
Min
AVDD = 3.3 V
0
AVDD = 3.3 V; mute set by Register
0x400E, Bit 1, and Register 0x400F, Bit 1
AVDD = 3.3 V
AVDD = 3.3 V
AVDD = 3.3 V
AVDD = 3.3 V
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
Scales linearly with AVDD
AVDD = 1.8 V
AVDD = 3.3 V
−60 dB input
AVDD = 1.8 V
AVDD = 3.3 V
94
AVDD = 1.8 V
AVDD = 3.3 V
92
−3 dBFS
AVDD = 1.8 V
AVDD = 3.3 V
AVDD = 1.8 V
AVDD = 3.3 V
AVDD = 1.8 V
AVDD = 3.3 V
AVDD = 3.3 V; mute set by Register
0x400E, Bit 1, and Register 0x400F, Bit 1
AVDD = 3.3 V
AVDD = 3.3 V
AVDD = 3.3 V
AVDD = 3.3 V
AVDD = 3.3 V, 100 mV rms, 1 kHz
AVDD = 3.3 V, 100 mV rms, 20 kHz
Scales linearly with AVDD
AVDD = 1.8 V
AVDD = 3.3 V
−3 dBFS input, measured at AOUTL pin,
beep gain set to 0 dB
AVDD = 1.8 V
AVDD = 3.3 V
AVDD = 1.8 V
AVDD = 3.3 V
AVDD = 1.8 V
AVDD = 3.3 V
ADAU1381
Typ
Max
Unit
32
dB
−98
dB
50
mdB
0.25
mV
−1
%
−98
dB
−55
dB
−55
dB
AVDD/3.3
0.55 (1.56)
1.0 (2.83)
96
99.2
92
96.5
−84
−85
96
100
92
97
−98
50
0.25
−1
−85
−60
−45
AVDD/3.3
0.55 (1.56)
1.0 (2.83)
V rms
V rms (V p-p)
V rms (V p-p)
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
mdB
mV
%
dB
dB
dB
V rms
V rms (V p-p)
V rms (V p-p)
−88
dB
−88
dB
99
dB
105
dB
96
dB
102
dB
Rev. 0| Page 5 of 84