Datasheet

ADAU1761
Rev. C | Page 6 of 92
Parameter Test Conditions/Comments Min Typ Max Unit
Interchannel Isolation 83 dB
Common-Mode Rejection Ratio 100 mV rms, 1 kHz 65 dB
100 mV rms, 20 kHz 65 dB
MICROPHONE BIAS MBIEN = 1
Bias Voltage
0.65 × AVDD AVDD = 1.8 V, MBI = 1 1.17 V
AVDD = 3.3 V, MBI = 1 2.145 V
0.90 × AVDD AVDD = 1.8 V, MBI = 0 1.62 V
AVDD = 3.3 V, MBI = 0 2.97 V
Bias Current Source AVDD = 3.3 V, MBI = 0, MPERF = 1 3 mA
Noise in the Signal Bandwidth AVDD = 3.3 V, 1 kHz to 20 kHz
MBI = 0, MPERF = 0 42 nV/√Hz
MBI = 0, MPERF = 1 85 nV/√Hz
MBI = 1, MPERF = 0 25 nV/√Hz
MBI = 1, MPERF = 1 37 nV/√Hz
DIGITAL-TO-ANALOG CONVERTERS
DAC performance excludes mixers and
headphone amplifier
DAC Resolution All DACs 24 Bits
Digital Attenuation Step 0.375 dB
Digital Attenuation Range 95 dB
DAC TO LINE OUTPUT
Full-Scale Output Voltage (0 dB) Scales linearly with AVDD AVDD/3.3 V rms
AVDD = 1.8 V 0.50 (1.41) V rms (V p-p)
AVDD = 3.3 V 0.92 (2.60) V rms (V p-p)
Analog Volume Control Step Line output volume control 0.75 dB
Analog Volume Control Range Line output volume control −57 1 +6 dB
Mute Attenuation −87 dB
Dynamic Range
20 Hz to 20 kHz, −60 dB input, line
output mode
With A-Weighted Filter (RMS) AVDD = 1.8 V 96 dB
AVDD = 3.3 V 101 dB
No Filter (RMS) AVDD = 1.8 V 93.5 dB
AVDD = 3.3 V 98 dB
Total Harmonic Distortion + Noise −1 dBFS, line output mode dB
AVDD = 1.8 V −90 dB
AVDD = 3.3 V −92 dB
Signal-to-Noise Ratio Line output mode
With A-Weighted Filter (RMS) AVDD = 1.8 V 96 dB
AVDD = 3.3 V 101 dB
No Filter (RMS) AVDD = 1.8 V 93.5 dB
AVDD = 3.3 V 98 dB
Power Supply Rejection Ratio CM capacitor = 20 F
100 mV p-p @ 217 Hz 56 dB
100 mV p-p @ 1 kHz 70 dB
Gain Error 3 %
Interchannel Gain Mismatch 0.005 dB
Offset Error 0 mV
Interchannel Isolation 1 kHz, 0 dBFS input signal 100 dB