ADS7864_14 datasheet(7/28 Pages) TI1

Part #	ADS7864

Description	500kHz, 12-Bit, 6-Channel Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER

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Manufacturer	TI1 [Texas Instruments]

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TYPICAL CHARACTERISTICS

Frequency (kHz)

0

−20

−40

−60

−80

−100

−120

0

62.5

125

250

187.5

Frequency (kHz)

0

−20

−40

−60

−80

−100

−120

0

62.5

125

250

187.5

10k

100k

1k

1M

Input Frequency (Hz)

75

70

65

60

55

50

SINAD

SNR

1.0

0.6

0.2

−0.2

−0.6

−1.0

SINAD

Temperature (

_C)

−20

−40

0

20

40

60

80

ADS7864

SBAS141A – SEPTEMBER 2000 – REVISED MARCH 2005

All specifications T

A = +25°C, +VA = +VD = +5V, VREF = internal +2.5V and fCLK = 8MHz, fSAMPLE = 500kHz (unless otherwise

noted)

FREQUENCY SPECTRUM

(4096 Point FFT; fIN = 99.9kHz, –0.2dB)

(4096 Point FFT; fIN = 199.9kHz, -0.2dB)

Figure 1.

Figure 2.

SIGNAL-TO-NOISE RATIO AND

CHANGE IN SIGNAL-TO-NOISE RATIO

SIGNAL-TO-(NOISE+DISTORTION)

AND SIGNAL-TO-(NOISE+DISTORTION)

vs INPUT FREQUENCY

vs TEMPERATURE

Figure 3.

Figure 4.

7

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