ADAU1772BCPZ-R7 datasheet(6/117 Pages) AD

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Data Sheet

ADAU1772

Rev. C | Page 5 of 116

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

Total Harmonic Distortion + Noise

20 Hz to 20 kHz, −1 dBFS

AVDD = 1.8 V

−88

AVDD = 3.3 V

−90

Signal-to-Noise Ratio2

With A-Weighted Filter (RMS)

AVDD = 1.8 V

AVDD = 3.3 V

102

With Flat 20 Hz to 20 kHz Filter

AVDD = 1.8 V

AVDD = 3.3 V

PGA Gain Variation

With −12 dB Setting

Standard deviation

0.05

With +35.25 dB Setting

Standard deviation

0.15

PGA Boost

PGA_x_BOOST

PGA Mute Attenuation

PGA_MUTEx

−65

Interchannel Gain Mismatch

0.005

Offset Error

Gain Error

±0.2

Interchannel Isolation

Power Supply Rejection Ratio

CM capacitor = 22 μF, 100 mV p-p at 1 kHz

MICROPHONE BIAS

MIC_ENx = 1

Bias Voltage

0.65 × AVDD

AVDD = 1.8 V, MIC_GAINx = 1

1.16

AVDD = 3.3 V, MIC_GAINx = 1

2.12

0.90 × AVDD

AVDD = 1.8 V, MIC_GAINx = 0

1.63

AVDD = 3.3 V, MIC_GAINx = 0

2.97

Bias Current Source

Output Impedance

Ω

MICBIASx Isolation

MIC_GAINx = 0

MIC_GAINx = 1

Noise in the Signal Bandwidth3

AVDD = 1.8 V, 20 Hz to 20 kHz

MIC_GAINx = 0

nV/√Hz

MIC_GAINx = 1

nV/√Hz

AVDD = 3.3 V, 20 Hz to 20 kHz

MIC_GAINx = 0

nV/√Hz

MIC_GAINx = 1

nV/√Hz

DIGITAL-TO-ANALOG CONVERTERS

DAC Resolution

All DACs

Bits

Digital Attenuation Step

0.375

Digital Attenuation Range

DAC SINGLE-ENDED OUTPUT

Single-ended operation, HPOUTLP and

HPOUTRP pins

Full-Scale Output Voltage

Scales linearly with AVDD

AVDD/3.4

V rms

AVDD = 1.8 V

0.53

V rms

AVDD = 1.8 V, 0 dBFS

1.5

V p-p

AVDD = 3.3 V

0.97

V rms

AVDD = 3.3 V, 0 dBFS

2.74

V p-p

Mute Attenuation

−72

Dynamic Range1

Line output mode, 20 Hz to 20 kHz, −60 dB input

With A-Weighted Filter (RMS)

AVDD = 1.8 V

100

AVDD = 3.3 V

104

With Flat 20 Hz to 20 kHz Filter

AVDD = 1.8 V

AVDD = 3.3 V

101

Signal-to-Noise Ratio2

Line output mode, 20 Hz to 20 kHz

With A-Weighted Filter (RMS)

AVDD = 1.8 V

100

AVDD = 3.3 V

104

With Flat 20 Hz to 20 kHz Filter

AVDD = 1.8 V

AVDD = 3.3 V

102

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