AD9748 datasheet(2/7 Pages) AD

2 / 7 page

REV. PrA

PRELIMINARY TECHNICAL DATA

–2–

AD9748

DC SPECIFICATIONS

Parameter

Min

Typ

Max

Unit

RESOLUTION

Bits

DC ACCURACY1

Integral Linearity Error (INL)

TBD

±0.25

TBD

LSB

Differential Nonlinearity (DNL)

TBD

±0.25

TBD

LSB

ANALOG OUTPUT

Offset Error

–0.02

+0.02

% of FSR

Gain Error (Without Internal Reference)

–0.5

±0.1

+0.5

% of FSR

Gain Error (With Internal Reference)

–0.5

±0.1

+0.5

% of FSR

Full-Scale Output Current2

2.0

20.0

Output Compliance Range

–1.0

+1.25

Output Resistance

100

Ω

Output Capacitance

REFERENCE OUTPUT

Reference Voltage

1.14

1.20

1.26

Reference Output Current

100

REFERENCE INPUT

Input Compliance Range

0.1

1.25

Reference Input Resistance (Ext. Ref)

Ω

Small Signal Bandwidth

0.5

MHz

TEMPERATURE COEFFICIENTS

Offset Drift

ppm of FSR/°C

Gain Drift (Without Internal Reference)

±50

ppm of FSR/°C

Gain Drift (With Internal Reference)

±100

ppm of FSR/°C

Reference Voltage Drift

±50

ppm/°C

POWER SUPPLY

Supply Voltages

AVDD

3.0

3.3

3.6

DVDD

3.0

3.3

3.6

Analog Supply Current (IAVDD)33

Digital Supply Current (IDVDD)

TBD

Supply Current Sleep Mode (IAVDD)5

Power Dissipation4

135

145

Power Dissipation

145

Power Supply Rejection Ratio—AVDD

–1

% of FSR/V

Power Supply Rejection Ratio—DVDD6

–0.04

+0.04

% of FSR/V

OPERATING RANGE

–40

+85

°C

NOTES

1Measured at IOUTA, driving a virtual ground.

2Nominal full-scale current, I

OUTFS, is 32 times the IREF current.

3An external buffer amplifier with input bias current <100 nA should be used to drive any external load.

4Measured at f

CLOCK = 25 MSPS and fOUT = 1.0 MHz.

5Measured as unbuffered voltage output with I

OUTFS = 20 mA and 50 Ω RLOAD at IOUTA and IOUTB, fCLOCK = 100 MSPS and fOUT = 40 MHz.

6±5% Power supply variation.

Specifications subject to change without notice.

(TMIN to TMAX, AVDD = 3.3 V, DVDD = 3.3 V, IOUTFS = 20 mA, unless otherwise noted.)

-SPECIFICATIONS

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