AD1885 datasheet(3/27 Pages) AD

Part #	AD1885

Description	AC??7 SoundMAX Codec

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Manufacturer	AD [Analog Devices]

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–3–

REV. 0

AD1885

DIGITAL DECIMATION AND INTERPOLATION FILTERS

*

Parameter

Min

Typ

Max

Unit

Passband

0

0.4

× FS

Hz

Passband Ripple

±0.09

dB

Transition Band

0.4

× F

S

0.6

× F

S

Hz

Stopband

0.6

× FS

∞

Hz

Stopband Rejection

–74

dB

Group Delay

12/FS

sec

Group Delay Variation Over Passband

0.0

µs

ANALOG-TO-DIGITAL CONVERTERS

Parameter

Min

Typ

Max

Unit

Resolution

16

Bits

Total Harmonic Distortion (THD

–84

dB

Dynamic Range (–60 dB Input THD+N Referenced to Full Scale, A-Weighted)

84

87

dB

Signal-to-Intermodulation Distortion

* (CCIF Method)

85

dB

ADC Crosstalk

*

Line Inputs (Input L, Ground R, Read R; Input R, Ground L, Read L)

–100

–90

dB

LINE_IN to Other

–90

–85

dB

Gain Error (Full-Scale Span Relative to Nominal Input Voltage)

±10

%

Interchannel Gain Mismatch (Difference of Gain Errors)

±0.5

dB

ADC Offset Error

±5mV

DIGITAL-TO-ANALOG CONVERTERS

Parameter

Min

Typ

Max

Unit

Resolution

16

Bits

Total Harmonic Distortion (THD) LINE_OUT

–85

dB

Total Harmonic Distortion (THD) HP_OUT (With 10 k

Ω Load)

–75

dB

Dynamic Range LINE_OUT (–60 dB Input THD+N Referenced to Full Scale,

A-Weighted)

85

90

dB

Signal-to-Intermodulation Distortion

* (CCIF Method)

–100

dB

Gain Error (Full-Scale Span Relative to Nominal Input Voltage)

±10

%

Interchannel Gain Mismatch (Difference of Gain Errors)

±0.7

dB

DAC Crosstalk

* (Input L, Zero R, Measure R_OUT; Input R, Zero L,

Measure L_OUT)

–80

dB

Total Audible Out-of-Band Energy (Measured from 0.6

× F

S to 20 kHz)*

–40

dB

ANALOG OUTPUT

Parameter

Min

Typ

Max

Unit

Full-Scale Output Voltage; LINE_OUT

1

V rms

2.83

V p-p

Output Impedance

*

800

Ω

External Load Impedance

*

10

k

Ω

Output Capacitance

*

15

pF

External Load Capacitance

100

pF

Full-Scale Output Voltage; HP_OUT (0 dB Gain)

1

V rms

Output Capacitance

*

100

pF

External Load Capacitance

32

Ω

VREF

2.05

2.25

2.45

V

VREFOUT

2.25

V

VREFOUT Current Drive

5mA

Mute Click (Muted Output Minus Unmuted Midscale DAC Output)

±5mV

*Guaranteed, not tested.

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