REV. A

–2–

AD1838–SPECIFICATIONS

TEST CONDITIONS

5.0 V

Ambient Temperature

25

°C

Input Clock

12.288 MHz, (256

DAC Input Signal

1.0078125 kHz,

0 dBFS (Full Scale)

ADC Input Signal

1.0078125 kHz, –1 dBFS (Full Scale)

48 kHz

Measurement Bandwidth

20 Hz to 20 kHz

Word Width

24 Bits

Load Capacitance

100 pF

Load Impedance

47 k

Ω

Performance of all channels is identical (exclusive of the Interchannel Gain Mismatch and Interchannel Phase Deviation specifications).

Parameter

Min

Typ

Max

Unit

ANALOG-TO-DIGITAL CONVERTERS

ADC Resolution

24

Bits

Dynamic Range (20 Hz to 20 kHz, –60 dB Input)

No Filter

100

103

dB

A-Weighted

101

105

dB

Total Harmonic Distortion + Noise (THD+N)

–95

–88.5

dB

Interchannel Isolation

100

dB

Interchannel Gain Mismatch

0.025

dB

Analog Inputs

Differential Input Range (

± Full Scale)

–2.828

+2.828

V

Common-Mode Input Voltage

2.25

V

Input Impedance

4

k

Ω

Input Capacitance

15

pF

2.25

V

DC Accuracy

Gain Error

±5%

Gain Drift

35

ppm/ºC

DIGITAL-TO-ANALOG CONVERTERS

DAC Resolution

Dynamic Range (20 Hz to 20 kHz, –60 dBFS Input)

No Filter

103

105

dB

With A-Weighted Filter

105

108

dB

Total Harmonic Distortion + Noise

–95

–90

dB

Interchannel Isolation

110

dB

DC Accuracy

Gain Error

±4%

Interchannel Gain Mismatch

0.025

dB

Gain Drift

200

ppm/

°C

Interchannel Phase Deviation

±0.1

Degrees

Volume Control Step Size (1023 Linear Steps)

0.098

%

Volume Control Range (Max Attenuation)

60

dB

Mute Attenuation

–100

dB

De-emphasis Gain Error

±0.1

dB

Full-Scale Output Voltage at Each Pin (Single-Ended)

1.0 (2.8)

V rms (V p-p)

Output Resistance at Each Pin

180

Ω

Common-Mode Output Voltage

2.25

V

ADC DECIMATION FILTER, 48 kHz

*

Pass Band

20

kHz

Pass-Band Ripple

±0.01

dB

Stop Band

24

kHz

Stop-Band Attenuation

120

dB

Group Delay

910

µs