ADAU1772BCPZ-R7 datasheet(8/117 Pages) AD

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Data Sheet

ADAU1772

Rev. C | Page 7 of 116

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

Dynamic Range1

Headphone mode, 20 Hz to 20 kHz, −60 dB input

With A-Weighted Filter (RMS)

AVDD = 1.8 V

104

AVDD = 3.3 V

107

With Flat 20 Hz to 20 kHz Filter

AVDD = 1.8 V

102

AVDD = 3.3 V

104

Signal-to-Noise Ratio2

Headphone mode, 20 Hz to 20 kHz

With A-Weighted Filter (RMS)

AVDD = 1.8 V

105

AVDD = 3.3 V

108

With Flat 20 Hz to 20 kHz Filter

AVDD = 1.8 V

103

AVDD = 3.3 V

106

Interchannel Gain Mismatch

Headphone mode

mdB

Total Harmonic Distortion + Noise

Headphone mode

32 Ω Load

−1 dBFS, AVDD = 1.8 V, PO = 27 mW

−75

−1 dBFS, AVDD = 3.3 V, PO = 90 mW

−83

24 Ω Load

−2 dBFS, AVDD = 1.8 V, PO = 28 mW

−75

−1 dBFS, AVDD = 3.3 V, PO = 118 mW

−77

16 Ω Load

−3 dBFS, AVDD = 1.8 V, PO = 33 mW

−75

−1 dBFS, AVDD = 3.3 V, PO = 175 mW

−83

Headphone Output Power

32 Ω Load

AVDD = 1.8 V, <0.1% THD + N

32.5

AVDD = 3.3 V, <0.1% THD + N

111.8

24 Ω Load

AVDD = 1.8 V, <0.1% THD + N

37.6

AVDD = 3.3 V, <0.1% THD + N

148.3

16 Ω Load

AVDD = 1.8 V, <0.1% THD + N

41.5

AVDD = 3.3 V, <0.1% THD + N

189.2

Gain Error

Headphone mode

±0.25

Offset Error

±0.1

Interchannel Isolation

1 kHz, 0 dBFS input signal

100

Power Supply Rejection Ratio

CM capacitor = 22 μF

100 mV p-p at 1 kHz

CM REFERENCE

CM pin

Common-Mode Reference Output

AVDD/2

Common-Mode Source Impedance

kΩ

REGULATOR

Line Regulation

mV/V

Load Regulation

mV/mA

1 Dynamic range is the ratio of the sum of noise and harmonic power in the band of interest with a −60 dBFS signal present to the full-scale power level in decibels

2 SNR is the ratio of the sum of all noise power in the band of interest with no signal present to the full-scale power level in decibels.

3 These specifications are with 4.7 µF decoupling and 5.0 kΩ load on pin.

CRYSTAL AMPLIFIER SPECIFICATIONS

Supply voltages AVDD = IOVDD = 1.8 V, DVDD = 1.1 V, unless otherwise noted.

Table 2.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

Jitter

270

500

Frequency Range

MHz

Load Capacitance

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