ADS1258IPHPREP datasheet(12/59 Pages) TI1

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REF (V)

−5

−10

−15

−20

0.5

1.0

5.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

Time After Power−On (s)

−2

−4

−6

−8

−10

Free−Air

REF (V)

0.5

1.0

5.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

IN (V)

−5

−4

−2

−4

−6

−8

−10

−3

−2

−1

REF = 5V

A = − 40_ C, −10_ C, +25_ C, +55_ C, +85_ C, +105_ C

Temperature (

_C)

−40

−20

120

100

Frequency(Hz)

-20

-40

-60

-80

-100

-120

-140

-160

-180

100k

100

10k

f=1kHz, 0.5dBFS

DRATE[1:0]=11

65536Points

ADS1258-EP

SBAS445D

– MARCH 2009 – REVISED MARCH 2011

www.ti.com

TYPICAL CHARACTERISTICS (continued)

At TA = +25°C, AVDD = +2.5V, AVSS = –2.5V, DVDD = +3.3V, fCLK = 16MHz (external clock) or fCLK = 15.729MHz (internal

clock), OPA227 buffer between MUX outputs and ADC inputs, VREFP = +2.048V, and VREFN =

–2.048V, unless otherwise

noted.

GAIN ERROR vs VREF

GAIN ERROR POWER-ON WARMUP

Figure 22.

Figure 23.

INTEGRAL NONLINEARITY vs VREF

INTEGRAL NONLINEARITY vs INPUT LEVEL

Figure 24.

Figure 25.

INTEGRAL NONLINEARITY vs TEMPERATURE

OUTPUT SPECTRUM

Figure 26.

Figure 27.

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