ADAU1781BCPZ datasheet(6/93 Pages) AD

Teilenummer	ADAU1781BCPZ

Bauteilbeschribung	Low Noise Stereo Codec

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Hersteller	AD [Analog Devices]

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ADAU1781

Rev. B| Page 5 of 92

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

Left/Right Microphone PGA Gain

Range

AVDD = 3.3 V

0

32

dB

Left/Right Microphone PGA Mute

Attenuation

AVDD = 3.3 V; mute set by Register

0x400E, Bit 1, and Register 0x400F, Bit 1

−98

dB

Interchannel Gain Mismatch

AVDD = 3.3 V

50

mdB

Offset Error

AVDD = 3.3 V

0.25

mV

Gain Error

AVDD = 3.3 V

−1

%

Interchannel Isolation

AVDD = 3.3 V

−98

dB

Power Supply Rejection Ratio

CM capacitor = 10 μF

AVDD = 3.3 V, 100 mV p-p at 217 Hz

−55

dB

AVDD = 3.3 V, 100 mV p-p at 1 kHz

−55

dB

DIFFERENTIAL MICROPHONE INPUT TO

ADC PATH

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

−60 dB input

With A-Weighted Filter (RMS)

AVDD = 1.8 V

96

dB

AVDD = 3.3 V

94

99.2

dB

No Filter (RMS)

AVDD = 1.8 V

92

dB

AVDD = 3.3 V

92

96.5

dB

Total Harmonic Distortion + Noise

−3 dBFS

AVDD = 1.8 V

−84

dB

AVDD = 3.3 V

−85

dB

Signal-to-Noise Ratio

With A-Weighted Filter (RMS)

AVDD = 1.8 V

96

dB

AVDD = 3.3 V

100

dB

No Filter (RMS)

AVDD = 1.8 V

92

dB

AVDD = 3.3 V

97

dB

Left/Right Microphone PGA Mute

Attenuation

AVDD = 3.3 V; mute set by Register

0x400E, Bit 1, and Register 0x400F, Bit 1

−98

dB

Interchannel Gain Mismatch

AVDD = 3.3 V

50

mdB

Offset Error

AVDD = 3.3 V

0.25

mV

Gain Error

AVDD = 3.3 V

−1

%

Interchannel Isolation

AVDD = 3.3 V

−85

dB

Common-Mode Rejection Ratio

AVDD = 3.3 V, 100 mV rms, 1 kHz

−60

dB

AVDD = 3.3 V, 100 mV rms, 20 kHz

−45

dB

BEEP TO LINE OUTPUT PATH

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)

Total Harmonic Distortion + Noise

−3 dBFS input, measured at AOUTL pin,

beep gain set to 0 dB

AVDD = 1.8 V

−88

dB

AVDD = 3.3 V

−88

dB

Signal-to-Noise Ratio

With A-Weighted Filter (RMS)

AVDD = 1.8 V

99

dB

AVDD = 3.3 V

105

dB

No Filter (RMS)

AVDD = 1.8 V

96

dB

AVDD = 3.3 V

102

dB

Ähnliche Beschreibung - ADAU1781BCPZ

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Analog Devices	ADAU1781	944Kb / 88P	Low Noise Stereo Codec with SigmaDSP Processing Core Rev. 0
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