Rev. 0

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Page 4 of 20

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February 2008

AD1984B

AD1984B SPECIFICATIONS

TEST CONDITIONS

PERFORMANCE

GENERAL SPECIFICATIONS

Parameter

Test Condition

Temperature

Digital Supply

Analog Supply

MIC_BIAS_IN (via Low-Pass Filter)

Input Signal (Frequency Sine Wave)

Amplitude for THD + N

Analog Output Pass Band

25°C

3.3 V

3.3 V

5.0 V

48 kHz

1008 Hz

–3.0 dB Full Scale

20 Hz to 20 kHz

DAC

10 k

Ω Output Load: Line-Out Tests

32

Ω Output Load: Headphone Tests

ADC

0 dB Gain

Parameter

Min

Typ

Max

Unit

Line-Out Drive (10 k

Ω loads—DAC to Pin)

Total Harmonic Distortion (THD + N)

Signal-to-Noise Ratio

–86

96

96

dB

dB

dB

Headphone Drive (32

Ω loads—DAC to Pin)

Total Harmonic Distortion (THD + N)

Signal-to-Noise Ratio

–80

96

96

dB

dB

dB

Microphone/Line-In (Pin to ADC, Mic Boost = 0 dB)

Total Harmonic Distortion (THD + N)

Signal-to-Noise Ratio

–81

90

90

dB

dB

dB

Parameter

Min

Typ

Max

Unit

DIGITAL DECIMATION AND INTERPOLATION FILTERS

1

0

Hz

±0.005

dB

Hz

–100

dB

20

Group Delay Variation over Pass Band

0

μs

ANALOG-TO-DIGITAL CONVERTERS

Resolution

24

Bits

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

±10

%

Interchannel Gain Mismatch (Difference of Gain Errors)

±0.2

±0.5

dB

ADC Offset Error1

±5mV

ADC Crosstalk

1

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

–85

dB

Line_In to Other

–100

–80

dB