ADAU1772BCPZ-R7 datasheet(5/117 Pages) AD

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ADAU1772

Data Sheet

Rev. C | Page 4 of 116

SPECIFICATIONS

Master clock = core clock = 12.288 MHz, serial input sample rate = 48 kHz, measurement bandwidth = 20 Hz to 20 kHz, word width =

24 bits, ambient temperature = 25°C, outputs line loaded with 10 kΩ.

ANALOG PERFORMANCE SPECIFICATIONS

Supply voltages AVDD = IOVDD = 1.8 V, DVDD = 1.1 V, unless otherwise noted. PLL disabled, direct master clock.

Table 1.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

ANALOG-TO-DIGITAL CONVERTERS

ADC Resolution

All ADCs

Bits

Digital Attenuation Step

0.375

Digital Attenuation Range

INPUT RESISTANCE

Gain settings do not include 10 dB gain from

PGA_x_BOOST settings; this additional gain does

not affect input impedance; PGA_POP_DISx = 1

Single-Ended Line Input

0 dB gain

14.3

kΩ

PGA Inputs

−12 dB gain

32.0

kΩ

0 dB gain

kΩ

+35.25 dB gain

0.68

kΩ

SINGLE-ENDED LINE INPUT

PGA_ENx = 0, PGA_x_BOOST = 0, PGA_POP_DISx = 1

Full-Scale Input Voltage

Scales linearly with AVDD

AVDD/3.63

V rms

AVDD = 1.8 V

0.49

V rms

AVDD = 1.8 V, 0 dBFS

1.38

V p-p

AVDD = 3.3 V

0.90

V rms

AVDD = 3.3 V, 0 dBFS

2.54

V p-p

Dynamic Range1

20 Hz to 20 kHz, −60 dB input

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

Signal-to-Noise Ratio (SNR)2

With A-Weighted Filter (RMS)

AVDD = 1.8 V

AVDD = 3.3 V

103

With Flat 20 Hz to 20 kHz Filter

AVDD = 1.8 V

AVDD = 3.3 V

100

Interchannel Gain Mismatch

mdB

Total Harmonic Distortion + Noise (THD + N)

20 Hz to 20 kHz, −1 dBFS

AVDD = 1.8 V

−90

AVDD = 3.3 V

−94

Offset Error

±0.1

Gain Error

±0.2

Interchannel Isolation

CM capacitor = 22 μF

100

Power Supply Rejection Ratio

CM capacitor = 22 μF

100 mV p-p at 1 kHz

SINGLE-ENDED PGA INPUT

PGA_ENx = 1, PGA_x_BOOST = 0

Full-Scale Input Voltage

Scales linearly with AVDD

AVDD/3.63

V rms

AVDD = 1.8 V

0.49

V rms

AVDD = 1.8 V, 0 dBFS

1.38

V p-p

AVDD = 3.3 V

0.90

V rms

AVDD = 3.3 V, 0 dBFS

2.54

V p-p

Dynamic Range1

20 Hz to 20 kHz, −60 dB input

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

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