www.ti.com

SPECIFICATIONS

ADS8411

SLAS369B – APRIL 2002 – REVISED DECEMBER 2004

T

A = –40°C to 85°C, +VA = 5 V, +VBD = 3 V or 5 V, Vref = 4.096 V, fSAMPLE = 2 MHz (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

25

pF

Input leakage current

0.5

nA

SYSTEM PERFORMANCE

Resolution

16

Bits

ADS8411I

15

No missing codes

Bits

ADS8411IB

16

ADS8411I

–6

±4

6

INL

Integral linearity (2)(3)

LSB

ADS8411IB

–2.5

±1.5

2.5

ADS8411I

–2

±1

3

DNL

Differential linearity

LSB

ADS8411IB

–1

±0.8

2

ADS8411I

–1.5

±0.5

1.5

mV

EO

Offset error(4)

ADS8411IB

–0.75

±0.25

0.75

mV

ADS8411I

–0.15

0.15

EG

Gain error(4)(5)

%FS

ADS8411IB

–0.098

0.098

Noise

60

µV RMS

At FFFFh output code,

PSRR

DC Power supply rejection ratio

+VA = 4.75 V to 5.25 V,

2

LSB

Vref = 4.096 V (4)

SAMPLING DYNAMICS

Conversion time

340

400

ns

Acquisition time

100

ns

Throughput rate

2

MHz

Aperture delay

2

ns

Aperture jitter

25

ps

Step response

100

ns

Overvoltage recovery

100

ns

DYNAMIC CHARACTERISTICS

VIN = 4 Vpp at 100 kHz

–90

dB

THD

Total harmonic distortion (6)

VIN = 4 Vpp at 500 kHz

–88.5

dB

SNR

Signal-to-noise ratio

VIN = 4 Vpp at 100 kHz

86

dB

SINAD

Signal-to-noise + distortion

VIN = 4 Vpp at 100 kHz

85

dB

VIN = 4 Vpp at 100 kHz

90

dB

SFDR

Spurious free dynamic range

VIN = 4 Vpp at 500 kHz

88

dB

-3dB Small signal bandwidth

5

MHz

EXTERNAL VOLTAGE REFERENCE INPUT

Reference voltage at REFIN, Vref

3.9

4.096

4.2

V

Reference resistance (7)

500

k

Ω

(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.

(6)

Calculated on the first nine harmonics of the input frequency

(7)

Can vary

±20%

3