ADC3421 datasheet(33/80 Pages) TI2

33 / 80 page

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ADC3421, ADC3422, ADC3423, ADC3424

www.ti.com

SBAS673A – JULY 2014 – REVISED OCTOBER 2015

7.18 Typical Characteristics: ADC3424

Typical values are at TA = 25°C, ADC sampling rate = 125 MSPS, 50% clock duty cycle, AVDD = 1.8 V, DVDD = 1.8 V, –1-

dBFS differential input, 2-VPP full-scale, 32k-point FFT, chopper disabled, and SNR reported with a 1-MHz offset from dc

when chopper is disabled and from fS / 2 when chopper is enabled, unless otherwise noted.

SFDR = 97 dBc, SNR = 70.4 dBFS, SINAD = 70.4 dBFS,

SFDR = 91 dBc, SNR = 70.7 dBFS, SINAD = 70.6 dBFS,

THD = 98 dBc, HD2 = 95 dBc, HD3 = 97 dBc

THD = 86 dBc, HD2 = 92 dBc, HD3 = 91 dBc

Figure 91. FFT for 10-MHz Input Signal

Figure 92. FFT for 10-MHz Input Signal

(Chopper On, Dither On)

(Chopper On, Dither Off)

SFDR = 99 dBc, SNR = 70.3 dBFS, SINAD = 70.3 dBFS,

SFDR = 91 dBc, SNR = 70.6 dBFS, SINAD = 70.6 dBFS,

THD = 95 dBc, HD2 = 103 dBc, HD3 = 99 dBc

THD = 87 dBc, HD2 = 91 dBc, HD3 = 95 dBc

Figure 93. FFT for 70-MHz Input Signal (Dither On)

Figure 94. FFT for 70-MHz Input Signal (Dither Off)

SFDR = 86 dBc, SNR = 69.8 dBFS, SINAD = 69.8 dBFS,

SFDR = 85 dBc, SNR = 70.3 dBFS, SINAD = 70.2 dBFS,

THD = 91 dBc, HD2 = 86 dBc, HD3 = 101 dBc

THD = 88 dBc, HD2 = 99 dBc, HD3 = 85 dBc

Figure 95. FFT for 170-MHz Input Signal (Dither On)

Figure 96. FFT for 170-MHz Input Signal (Dither Off)

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Product Folder Links: ADC3421 ADC3422 ADC3423 ADC3424

ADC3421 Datasheet(PDF) 33 Page - Texas Instruments

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