AD9481-PCB datasheet(3/28 Pages) AD

Part #	AD9481-PCB

Description	8-Bit, 250 MSPS 3.3 V A/D Converter

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Manufacturer	AD [Analog Devices]

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AD9481

Rev. 0 | Page 3 of 28

DC SPECIFICATIONS

AVDD = 3.3 V, DRVDD = 3.3 V; TMIN = −40°C, TMAX = +85°C, AIN = −1 dBFS, full scale = 1.0 V, internal reference, differential analog and

clock inputs, unless otherwise noted.

Table 1.

AD9481-250

Parameter

Temp

Test Level

Min

Typ

Max

Unit

RESOLUTION

8

Bits

ACCURACY

No Missing Codes

Full

VI

Guaranteed

Offset Error

25°C

I

−40

40

mV

Gain Error1

25°C

I

−6.0

6.0

% FS

Differential Nonlinearity (DNL)

Full

VI

−0.85

±0.35

0.85

LSB

Integral Nonlinearity (INL)

Full

VI

−0.9

±0.26

0.9

LSB

TEMPERATURE DRIFT

Offset Error

Full

V

30

µV/°C

Gain Error

Full

V

0.03

% FS/°C

Reference

Full

V

±0.025

mV/°C

REFERENCE

Internal Reference Voltage

Full

VI

0.97

1.0

1.03

V

Output Current2

25°C

IV

1.5

mA

IVREF Input Current3

25°C

I

100

µA

ISENSE Input Current2

25°C

I

10

µA

ANALOG INPUTS (VIN+, VIN−)

Differential Input Voltage Range4

Full

V

1

V p-p

Common-Mode Voltage

Full

VI

1.6

1.9

2.1

V

Input Resistance

Full

VI

8.4

10

11.2

kΩ

Input Capacitance

25°C

V

4

pF

Analog Bandwidth, Full Power

25°C

V

750

MHz

POWER SUPPLY

AVDD

Full

IV

3.0

3.3

3.6

V

DRVDD

Full

IV

3.0

3.3

3.6

V

Supply Currents

IAVDD5

Full

VI

133

145

mA

IDRVDD5

Full

VI

39

42.5

mA

Power Dissipation5

25°C

V

439

mW

Power-Down Dissipation

25°C

V

15

37

mW

Power Supply Rejection Ratio (PSRR)

25°C

V

−4.2

mV/V

1 Gain error and gain temperature coefficients are based on the ADC only (with a fixed 1 V external reference and 1 V p-p input range).

2 Internal reference mode; SENSE = AGND.

3 External reference mode; VREF driven by external 1.0 V reference; SENSE = AVDD.

4 In FS = 1 V, both analog inputs are 500 mV p-p and out of phase with each other.

5 Supply current measured with rated encode and a 20 MHz analog input. Power dissipation measured with dc input, see the T

section for power vs. clock

rate.

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