ADS1251

2

SBAS184D

www.ti.com

Analog Input: Current ...............................................

±100mA, Momentary

±10mA, Continuous

Operating Temperature ...................................................... –40

°C to 85°C

Power Dissipation .......................................................................... 500mW

ELECTROSTATIC

DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Texas

Instruments recommends that all integrated circuits be handled

with appropriate precautions. Failure to observe proper han-

dling and installation procedures can cause damage.

ESD damage can range from subtle performance degrada-

tion to complete device failure. Precision integrated circuits

may be more susceptible to damage because very small

parametric changes could cause the device not to meet its

published specifications.

NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings”

may cause permanent damage to the device. Exposure to absolute maximum

conditions for extended periods may affect device reliability.

SPECIFIED

PACKAGE

TEMPERATURE

PACKAGE

ORDERING

TRANSPORT

PRODUCT

PACKAGE-LEAD

DESIGNATOR

RANGE

MARKING

NUMBER

MEDIA, QUANTITY

ADS1251

SO-8

D

–40

°C to +85°C

ADS1251U

ADS1251U

Rails, 100

"

"""

"

ADS1251U/2K5

Tape and Reel, 2500

NOTE: (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com.

ELECTRICAL CHARACTERISTICS

ADS1251U

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ANALOG INPUT

Full-Scale Input Voltage

±V

REF

V

Absolute Input Voltage

–0.3

V

Differential Input Impedance

CLK = 3.84kHz

430

M

Ω

CLK = 1MHz

1.7

M

Ω

CLK = 8MHz

210

k

Ω

Input Capacitance

6pF

Input Leakage

At +25

°C5

50

pA

1nA

DYNAMIC CHARACTERISTICS

Data Rate

20.8

kHz

Bandwidth

–3dB, CLK = 8MHz

4.24

kHz

Serial Clock (SCLK)

8MHz

System Clock Input (CLK)

8MHz

ACCURACY

Integral Nonlinearity

Differential Input

±0.0002

±0.0015

% of FSR

THD

1kHz Input; 0.1dB below FS

105

dB

Noise

1.5

2.5

ppm of FSR, rms

Resolution

24

Bits

No Missing Codes

24

Bits

Common-Mode Rejection

60Hz, AC

90

98

dB

Gain Error

0.1

1

% of FSR

Offset Error

±30

±100

ppm of FSR

1:1

Power-Supply Rejection Ratio

70

80

dB

PERFORMANCE OVER TEMPERATURE

Offset Drift

0.07

ppm/

°C

Gain Drift

0.4

ppm/

°C

PRODUCT

# OF INPUTS

MAXIMUM DATA RATE

COMMENTS

ADS1250

1 Differential

25.0kHz

Includes PGA from 1 to 8

ADS1251

1 Differential

20.8kHz

ADS1252

1 Differential

41.7kHz

ADS1253

4 Differential

20.8kHz

ADS1254

4 Differential

20.8kHz

Includes Separate Analog and Digital Supplies

PRODUCT FAMILY