ADS8688A datasheet(19/80 Pages) TI1

Part #	ADS8688A

Description	4- and 8-Channel, Single-Supply, SAR ADCs

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Manufacturer	TI1 [Texas Instruments]

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19 / 80 page

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C049

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C050

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C047

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C048

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Input Frequency (Hz)

C045

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C046

ADS8684A, ADS8688A

www.ti.com

SBAS680 – JULY 2015

Typical Characteristics (continued)

At TA = 25°C, AVDD = 5 V, DVDD = 3 V, internal reference VREF = 4.096 V, and fSAMPLE = 500 kSPS, unless otherwise noted.

Number of points = 64k, fIN = 1 kHz, SNR = 89.6 dB,

Number of points = 64k, fIN = 1 kHz, SNR = 90.93 dB,

SINAD = 89.5 dB, THD = 106 dB, SFDR = 107 dB

SINAD = 90.48 dB, THD = 100 dB, SFDR = 102 dB

Figure 44. Typical FFT Plot (±0.625 × VREF)

Figure 45. Typical FFT Plot (2.5 × VREF)

Number of points = 64k, fIN = 1 kHz, SNR = 89.6 dB,

Number of points = 64k, fIN = 1 kHz, SNR = 83.55 dB,

SINAD = 89.5 dB, THD = –106 dB, SFDR = 107 dB

SINAD = 83.5 dB, THD = –104 dB, SFDR = 107 dB

Figure 46. Typical FFT Plot (1.25 × VREF)

Figure 47. Typical FFT Plot (±0.3125 × VREF)

Number of points = 64k, fIN = 1 kHz, SNR = 77.6 dB,

Number of points = 64k, fIN = 1 kHz, SNR = 83.55 dB,

SINAD = 77.6 dB, THD = –106 dB, SFDR = 107 dB

SINAD = 83.5 dB, THD = –103 dB, SFDR = 107 dB

Figure 48. Typical FFT Plot (±0.15625 × VREF)

Figure 49. Typical FFT Plot (0.625 × VREF)

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