ADC3421 datasheet(24/80 Pages) TI2

24 / 80 page

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ADC3421, ADC3422, ADC3423, ADC3424

SBAS673A – JULY 2014 – REVISED OCTOBER 2015

www.ti.com

Typical Characteristics: ADC3422 (continued)

Typical values are at TA = 25°C, ADC sampling rate = 50 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 = 75 dBc, SNR = 69 dBFS, SINAD = 67.9 dBFS,

SFDR = 75 dBc, SNR = 69.2 dBFS, SINAD = 67.9 dBFS,

THD = 74 dBc, HD2 = 75 dBc, HD3 = 81 dBc

THD = 73 dBc, HD2 = 75 dBc, HD3 = 81 dBc

Figure 37. FFT for 270-MHz Input Signal (Dither On)

Figure 38. FFT for 270-MHz Input Signal (Dither Off)

SFDR = 68 dBc, SNR = 67.2 dBFS, SINAD = 67.1 dBFS,

SFDR = 68 dBc, SNR = 67.5 dBFS, SINAD = 67.4 dBFS,

THD = –86 dBc, HD2 = 75 dBc, HD3 = 73 dBc

THD = –87 dBc, HD2 = –68 dBc, HD3 = –87 dBc

Figure 39. FFT for 450-MHz Input Signal (Dither On)

Figure 40. FFT for 450-MHz Input Signal (Dither Off)

fIN1 = 46 MHz, fIN2 = 50 MHz, IMD3 = 102 dBFS,

fIN1 = 46.3 MHz, fIN2 = 50.3 MHz, IMD3 = 110 dBFS,

each tone at –7 dBFS

each tone at –36 dBFS

Figure 41. FFT for Two-Tone Input Signal

Figure 42. FFT for Two-Tone Input Signal

(–7 dBFS at 46 MHz and 50 MHz)

(–36 dBFS at 46 MHz and 50 MHz)

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Product Folder Links: ADC3421 ADC3422 ADC3423 ADC3424

ADC3421 Datasheet(PDF) 24 Page - Texas Instruments

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