Datasheet

ADAU1761
Rev. C | Page 5 of 92
Parameter Test Conditions/Comments Min Typ Max Unit
PSEUDO-DIFFERENTIAL PGA INPUT
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 20 Hz to 20 kHz, −60 dB input
With A-Weighted Filter (RMS) AVDD = 1.8 V 92 dB
AVDD = 3.3 V 98 dB
No Filter (RMS) AVDD = 1.8 V 90 dB
AVDD = 3.3 V 95 dB
Total Harmonic Distortion + Noise −1 dBFS
AVDD = 1.8 V −88 dB
AVDD = 3.3 V −89 dB
Signal-to-Noise Ratio
With A-Weighted Filter (RMS) AVDD = 1.8 V 92 dB
AVDD = 3.3 V 98 dB
No Filter (RMS) AVDD = 1.8 V 90 dB
AVDD = 3.3 V 95 dB
Volume Control Step PGA gain 0.75 dB
Volume Control Range PGA gain −12 +35.25 dB
PGA Boost 20 dB
Mute Attenuation −87 dB
Interchannel Gain Mismatch 0.005 dB
Offset Error 0 mV
Gain Error −14 %
Interchannel Isolation 83 dB
Common-Mode Rejection Ratio 100 mV rms, 1 kHz 65 dB
100 mV rms, 20 kHz 65 dB
FULL DIFFERENTIAL PGA INPUT Differential PGA inputs
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 20 Hz to 20 kHz, −60 dB input
With A-Weighted Filter (RMS) AVDD = 1.8 V 92 dB
AVDD = 3.3 V 98 dB
No Filter (RMS) AVDD = 1.8 V 90 dB
AVDD = 3.3 V 95 dB
Total Harmonic Distortion + Noise −1 dBFS
AVDD = 1.8 V −70 dB
AVDD = 3.3 V −78 dB
Signal-to-Noise Ratio
With A-Weighted Filter (RMS) AVDD = 1.8 V 92 dB
AVDD = 3.3 V 98 dB
No Filter (RMS) AVDD = 1.8 V 90 dB
AVDD = 3.3 V 95 dB
Volume Control Step PGA gain 0.75 dB
Volume Control Range PGA gain −12 +35.25 dB
PGA Boost 20 dB
Mute Attenuation −87 dB
Interchannel Gain Mismatch 0.005 dB
Offset Error 0 mV
Gain Error −14 %