ADS7230IPWR datasheet(6/51 Pages) TI1

Numer części	ADS7230IPWR

Szczegółowy opis	LOW-POWER, 12-BIT, 1MHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE

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Producent	TI1 [Texas Instruments]

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ADS7229

ADS7230

SBAS437A – MAY 2008 – REVISED JUNE 2009 ............................................................................................................................................................... www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

At TA = –40°C to +85°C, +VA = 2.7V to 3.6V, +VBD = 1.65V to 1.5 × (+VA), VREF = 2.5V, fSAMPLE = 1MHz for 3V ≤ +VA ≤

3.6V, and fSAMPLE = 900kHz for 3V < +VA ≤ 2.7V using external clock, unless otherwise noted.

ADS7229, ADS7230

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DYNAMIC CHARACTERISTICS

VIN = 2.5VPP at 10kHz

–96.8

THD

Total harmonic distortion(4)

dB

VIN = 2.5VPP at 100kHz

–88.4

VIN = 2.5VPP at 10kHz

72

73.2

SNR

Signal-to-noise ratio

dB

VIN = 2.5VPP at 100kHz

72

VIN = 2.5VPP at 10kHz

73.1

SINAD

Signal-to-noise + distortion

dB

VIN = 2.5VPP at 100kHz

72.1

VIN = 2.5VPP at 10kHz

95.9

SFDR

Spurious-free dynamic range

dB

VIN = 2.5VPP at 100kHz

91.5

–3dB small-signal bandwidth

30

MHz

CLOCK

Internal conversion clock frequency

21

23

23.5

MHz

Used as I/O clock only

42

SCLK external serial clock

MHz

As I/O clock and conversion clock

1

42

EXTERNAL VOLTAGE REFERENCE INPUT

fSAMPLE ≤ 500kSPS,

0.3

2.525

2.7V

≤ +VA < 3V

fSAMPLE ≤ 500kSPS,

0.3

3

3V

≤ +VA < 3.6V

VREF [(REF+) – (REF–)]

Input reference

VREF

fSAMPLE > 500kSPS,

V

range

2.475

2.525

2.7V

≤ +VA < 3V

fSAMPLE > 500kSPS,

2.475

3

3V

≤ +VA ≤ 3.6V

(REF–) – AGND

–0.1

0.1

Resistance(5)

Reference input

40

k

Ω

DIGITAL INPUT/OUTPUT

Logic family—CMOS

VIH

High-level input voltage

(+VA × 1.5)V

≥ +VBD ≥ 1.65V

0.65 × (+VBD)

+VBD + 0.3

V

VIL

Low-level input voltage

(+VA × 1.5)V

≥ +VBD ≥ 1.65V

–0.3

0.35 × (+VBD)

V

II

Input current

VI = +VBD or BDGND

–50

50

nA

CI

Input capacitance

5

pF

(+VA × 1.5)V

≥ +VBD ≥ 1.65V,

VOH

High-level output voltage

+VBD – 0.6

+VBD

V

IO = 100µA

(+VA × 1.5)V

≥ +VBD ≥ 1.65V,

VOL

Low-level output voltage

0

0.4

V

IO = 100µA

CO

Output capacitance

5

pF

CL

Load capacitance

30

pF

Data format—straight binary

(4)

Calculated on the first nine harmonics of the input frequency.

(5)

Can vary ±30%.

6

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Product Folder Link(s): ADS7229 ADS7230

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