ADS8481IPFBR datasheet(3/31 Pages) BURR-BROWN

Teilenummer	ADS8481IPFBR

Bauteilbeschribung	18-BIT, 1-MSPS, PSEUDO-DIFFERENTIAL UNIPOLAR INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE AND REFERENCE

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Hersteller	BURR-BROWN [Burr-Brown (TI)]

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SPECIFICATIONS

ADS8481

SLAS385A – FEBRUARY 2006 – REVISED MARCH 2006

T

A = –40°C to 85°C, +VA = 5 V, +VBD = 3 V or 5 V, Vref = 4.096 V, fSAMPLE = 1 MSPS (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ANALOG INPUT

Full-scale input voltage(1)

+IN – (–IN)

0

Vref

V

+IN

–0.2

Vref +0.2

Absolute input voltage

V

–IN

–0.2

0.2

Input capacitance

65

pF

Input leakage current

1

nA

SYSTEM PERFORMANCE

Resolution

18

Bits

ADS8481I

18

No missing codes

Bits

ADS8481IB

18

ADS8481I

–5 –1.5/+1.9

5

LSB

Integral linearity(2)(3)

(18 bit)

ADS8481IB

–3.5 –1.5/+1.9

3.5

ADS8481I

–1 –0.5/+0.7

2.5

LSB

Differential linearity

(18 bit)

ADS8481IB

–1 –0.5/+0.7

1.5

ADS8481I

–0.5

±0.1

0.5

Offset error(4)

mV

ADS8481IB

–0.5

±0.1

0.5

Offset error temperature drift

±0.2

ppm/°C

ADS8481I

Vref = 4.096 V

–0.075

±0.05

0.075

%FS

Gain error(4)(5)

ADS8481IB

Vref = 4.096 V

–0.075

±0.05

0.075

%FS

Gain error temperature drift

±0.6

ppm/°C

Noise

30

µV RMS

Power supply rejection ratio

At 3FFFFh output code

60

dB

SAMPLING DYNAMICS

Conversion time

650

710

ns

Acquisition time

250

ns

Throughput rate

1

MHz

Aperture delay

4

ns

Aperture jitter

5

ps

Step response

150

ns

Over voltage recovery

150

ns

(1)

Ideal input span, does not include gain or offset error.

(2)

LSB means least significant bit

(3)

This is endpoint INL, not best fit.

(4)

Measured relative to an ideal full-scale input [+IN – (–IN)] of 4.096 V

(5)

This specification does not include the internal reference voltage error and drift.

3

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