ADS1203

SBAS318C − JUNE 2004 − REVISED JANUARY 2008

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3

ELECTRICAL CHARACTERISTICS

Over recommended operating free-air temperature range at −40

ADS1203I

PARAMETER

TEST CONDITIONS

MIN

MAX

UNITS

Resolution

16

Bits

DC Accuracy

INL

±1

±4

LSB

INL

TA = −40°C to +85°C

±3

LSB

DNL

±1

LSB

±220

±1000

µV

Input offset drift

±3.5

±8

µV/°C

REFIO = internal 2.5V

±0.2

±1.4

%

REFIO = internal 2.5V, TA = −40°C to +85°C

−1

1

%

Gain error drift

±30

ppm/

°C

Gain error drift

TA = −40°C to +85°C

±20

ppm/

°C

PSRR

Power-supply rejection ratio

80

dB

Analog Input

FSR

Full-scale differential range

±320

mV

Operating common-mode

signal(3)

−0.1

5

V

Input capacitance

Common-mode

3

pF

Input leakage current

±16

nA

Input leakage current

TA = −40°C to +85°C

±1

nA

Differential input resistance

Equivalent

28

k

Ω

Differential input capacitance

5

pF

CMRR

Common-mode rejection ratio

At DC

92

dB

CMRR

Common-mode rejection ratio

105

dB

Internal Clock for Modes 0, 1, and 2

Clock frequency

8.7

10

11

MHz

Clock frequency

TA = −40°C to +85°C

9

11

MHz

External Clock for Mode 3

16

20

24

MHz

(1) All typical values are at T

°C.

(2) Integral nonlinearity is defined as the maximum deviation of the line through the end points of the specified input range of the transfer curve

(3) Ensured by design.

(4) Maximum values, including temperature drift, are ensured over the full specified temperature range.

(5) With reduced accuracy, the supported external clock frequency range is 1MHz up to 32MHz.

(6) Available only for QFN package.

(7) Applicable for 5.0V nominal supply: BV

(8) Applicable for 3.0V nominal supply: BV

(9) Measured with CLKOUT pin not loaded.