ADS7829IB datasheet(4/20 Pages) TI

Part #	ADS7829IB

Description	10/8/12-BIT HIGH SPEED 2.7 V microPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER

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Manufacturer	TI [Texas Instruments]

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ADS7826

ADS7827

ADS7829

SLAS388 – JUNE 2003

SPECIFICATIONS (continued)

At -40

°C to 85°C, V

CC = 2.7 V, Vref = 2.5 V, unless otherwise specified.

ADS7829IB

ADS7829

ADS7826I

ADS7827I

TEST

PARAMETER

UNIT

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

VOH

IOH = -250 µA

2.2

2.1

V

VOL

IOL = 250 µA

0.4

V

Data format

Straight binary

POWER SUPPLY REQUIREMENTS

VCC

Operating range

2.7

3.6

2.7

3.6

2.7

3.6

2.7

3.6

V

See (3) and (2)

2.0

2.7

2.0

2.7

2.0

2.7

2.0

2.7

V

See (2)

3.6

5.25

3.6

5.25

3.6

5.25

3.6

5.25

V

Quiescent cur-

Full speed (4)

220

350

220

350

250

350

260

350

µA

rent

fSAMPLE = 7.5 kHz

20

µA

(5),

fSAMPLE = 7.5 kHz

180

µA

(6)

Power down

CS = VCC

3

µA

TEMPERATURE RANGE

Specified performance

-40

85

-40

85

-40

85

-40

85

°C

(4)

Full speed: 125 ksps for ADS7829, 200 ksps for ADS7826, and 250 ksps for ADS7827.

(5)

fDCLOCK = 1.2 MHz, CS = VCC for 145 clock cycles out of every 160 for the ADS7829I and ADS7829IB.

(6)

See the Power Dissipation section for more information regarding lower sample rates.

At -40

°C to 85°C, V

CC = 5 V, Vref = 5 V, unless otherwise specified.

ADS7829IB

ADS7829

ADS7826I

ADS7827I

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

SYSTEM PERFORMANCE

Resolution

12

10

8

Bits

No missing codes

12

11

10

8

Bits

Integral linearity error

±0.6

±0.8

±0.15

±0.1

1 LSB (7)

Differential linearity error

±0.5

±0.8

±0.15

±0.1

1

LSB

ANALOG INPUT

Offset error

±2.6

±1.2

±0.7

LSB

Gain error

±1.2

±0.2

±0.1

LSB

REFERENCE INPUT

Voltage range

0.05

VCC

0.05

VCC

0.05

VCC

0.05

VCC

V

(7)

LSB means Least Significant Bit . With Vref equal to 5 V, one LSB is 1.22 mV for a 12 bit ADC.

4

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