REV. 0

–2–

AD1838–SPECIFICATIONS

TEST CONDITIONS

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

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 Volts

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

±4.0

%

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)

Vrms (V p-p)

Output Resistance at Each Pin

180

Ω

Common-Mode Output Volts

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