ADS8699IPWR datasheet(31/74 Pages) TI2

部件名	ADS8699IPWR

功能描述	ADS869x 18-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System With Programmable, Bipolar Input Ranges

PDF	74 Pages

Scroll/Zoom	100%

制造商	TI2 [Texas Instruments]

网页	https://www.ti.com

标志

31 / 74 page

The performance of the internal buffer output is very stable across the entire operating temperature range of –

40°C to +125°C. Figure 7-13 shows the variation in the REFCAP output across temperature for different values

of the AVDD supply voltage. The typical specified value of the reference buffer drift over temperature is 0.5

ppm/°C, as shown in Figure 7-14, and the maximum specified temperature drift is equal to 2 ppm/°C.

Free-Air Temperature (0C)

-40

-7

125

4.09

4.091

4.092

4.093

4.094

4.095

4.096

4.097

4.098

4.099

4.1

D063

AVDD = 5.25 V

AVDD = 5 V

AVDD = 4.75 V

Figure 7-13. Reference Buffer Output (REFCAP)

Variation vs Supply and Temperature

REFCAP Drift (ppm/ºC)

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

D064

AVDD = 5 V, number of devices = 30, ΔT = –40°C to +125°C

Figure 7-14. Reference Buffer Temperature Drift

Histogram

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ADS8691, ADS8695, ADS8699

SBAS777B – DECEMBER 2016 – REVISED MARCH 2021

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