ADS1258IPHPREP datasheet(10/57 Pages) TI

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Input Voltage (%FS)

−100 −75

100

−50

−25

DRATE[1:0] = 11

DRATE[1:0] = 10

DRATE[1:0] = 01

DRATE[1:0] = 00

RMS Noise (

µV)

50 units from two production lots.

DRATE[1:0] = 11

REF (V)

0.5

1.5

5.5

2.5

3.5

4.5

DRATE[1:0] = 11

DRATE[1:0] = 10

DRATE[1:0] = 01

DRATE[1:0] = 00

DVDD, AVDD−AVSS (V)

2.5

3.0

5.5

3.5

4.0

4.5

5.0

DRATE[1:0] = 11

from DVDD

from AVDD−AVSS

ADS1258-EP

SBAS445C – MARCH 2009 – REVISED DECEMBER 2009

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.

NOISE HISTOGRAM

NOISE vs INPUT VOLTAGE

Figure 8.

Figure 9.

NOISE vs VREF

NOISE vs SUPPLY VOLTAGE

Figure 10.

Figure 11.

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