ADS8482IB datasheet(3/31 Pages) BURR-BROWN

Part #	ADS8482IB

Description	18-BIT, 1-MSPS, PSEUDO-BIPOLAR, FULLY DIFFERENTIAL INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE, REFERENCE

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

Direct Link	http://www.burr-brown.com

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SPECIFICATIONS

ADS8482

SLAS386A – JULY 2005 – REVISED JUNE 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)

–Vref

Vref

V

+IN

–0.2

Vref + 0.2

Absolute input voltage

V

–IN

–0.2

Vref + 0.2

Common-mode input range

(Vref)/2 – 0.2

(Vref)/2

(Vref)/2 + 0.2

V

Input capacitance

65

pF

Input leakage current

1

nA

SYSTEM PERFORMANCE

Resolution

18

Bits

ADS8482I

18

No missing codes

Bits

ADS8482IB

18

ADS8482I

–4

±1.2

4

LSB

Integral linearity (2)

(18 bit)(3)

ADS8482IB

–2.5

±1.2

2.5

ADS8482I

–1

–0.6/0.75

1.5

LSB

Differential linearity

(18 bit)

ADS8482IB

–1

–0.6/0.75

1.5

ADS8482I

–0.5

±0.05

0.5

Offset error(4)

mV

ADS8482IB

–0.5

±0.05

0.5

ADS8482I

±0.05

Offset error temperature drift

ppm/

°C

ADS8482IB

±0.05

ADS8482I

Vref = 4.096 V

–0.1

±0.035

0.1

%FS

Gain error(4)(5)

ADS8482IB

Vref = 4.096 V

–0.1

±0.035

0.1

%FS

ADS8482I

±0.5

Gain error temperature drift

ppm/

°C

ADS8482IB

±0.5

At dc (

±0.2 V around V

ref/2)

60

Common-mode rejection ratio

dB

+IN – (–IN) = 1 Vpp at 1 MHz

55

Noise

25

µV RMS

Power supply rejection ratio

At 1FFFFh output code

60

dB

SAMPLING DYNAMICS

Conversion time

625

650

ns

Acquisition time

320

350

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)

This is endpoint INL, not best fit.

(3)

LSB means least significant bit

(4)

Measured relative to an ideal full-scale input [+IN – (–IN)] of 8.192 V

(5)

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

3

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