ADS7229IPWR datasheet(4/46 Pages) TI

No. de pieza	ADS7229IPWR

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

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Fabricante Electrónico	TI [Texas Instruments]

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4 / 46 page

ADS7229

ADS7230

SBAS437 – MAY 2008........................................................................................................................................................................................................ www.ti.com

ELECTRICAL CHARACTERISTICS: VREF = 5V (continued)

At TA = –40°C to +85°C, +VA = 5V, +VBD = +1.65V to +5.5V, VREF = 5V, and fSAMPLE = 1MHz, unless otherwise noted.

ADS7229, ADS7230

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DYNAMIC CHARACTERISTICS

VIN = 5VPP at 10kHz

–88.5

THD

Total harmonic distortion(4)

dB

VIN = 5VPP at 100kHz

–85.5

VIN = 5VPP at 10kHz

73.9

SNR

Signal-to-noise ratio

dB

VIN = 5VPP at 100kHz

72

73.8

VIN = 5VPP at 10kHz

73.7

SINAD

Signal-to-noise + distortion

dB

VIN = 5VPP at 100kHz

73.3

VIN = 5VPP at 10kHz

93.4

SFDR

Spurious-free dynamic range

dB

VIN = 5VPP at 100kHz

90.5

–3dB small-signal bandwidth

30

MHz

CLOCK

Internal conversion clock frequency

21

23

24.5

MHz

Used as I/O clock only

50

SCLK external serial clock

MHz

As I/O clock and conversion clock

1

42

EXTERNAL VOLTAGE REFERENCE INPUT

Input

VREF [REF+ – (REF–)]

0.3

5

+VA

VREF

reference

V

(REF–) – AGND

–0.1

0.1

range

Resistance(5)

Reference input

40

k

Ω

DIGITAL INPUT/OUTPUT

Logic family—CMOS

VIH

High-level input voltage

5.5V

≥ +VBD ≥ 4.5V

0.65

× (+VBD)

+VBD + 0.3

V

VIL

Low-level input voltage

5.5V

≥ +VBD ≥ 4.5V

–0.3

0.35

× (+VBD)

V

II

Input current

VI = +VBD or BDGND

–50

50

nA

Ci

Input capacitance

5

pF

5.5V

≥ +VBD ≥ 4.5V,

VOH

High-level output voltage

+VBD – 0.6

+VBD

V

IO = 100µA

5.5V

≥ +VBD ≥ 4.5V,

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

POWER-SUPPLY REQUIREMENTS

+VBD

1.65

3.3

5.5

V

Power-supply

voltage

+VA

4.5

5

5.5

V

1MHz Sample rate

5.7

7.0

mA

Supply current

Nap or Auto Nap mode

0.3

0.5

PD Mode

4

1

µA

1MSPS, BVDD = 1.8V

0.1

0.5

Buffer I/O supply current

mA

1MSPS, BVDD = 3V

0.5

1.2

AVDD = 5V, BVDD = 1.8V

28.8

36.5

Power dissipation

mW

AVDD = 5V, BVDD = 3V

30.0

38.6

TEMPERATURE RANGE

TA

Operating free-air temperature

–40

+85

°C

(4)

Calculated on the first nine harmonics of the input frequency.

(5)

Can vary ±30%.

4

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Product Folder Link(s): ADS7229 ADS7230

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