ADS4449 datasheet(8/56 Pages) TI1

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ADS4449

SBAS603A – APRIL 2013 – REVISED JANUARY 2016

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Electrical Characteristics (continued)

Typical values are at TA = 25°C, full temperature range is TMIN = –40°C to TMAX = 85°C, ADC clock frequency = 250 MHz,

50% clock duty cycle, AVDD33V = 3.3 V, AVDD = 1.9 V, DRVDD = 1.8 V, and –1-dBFS differential input, unless otherwise

noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

fIN = 40 MHz

fIN = 70 MHz

fIN = 140 MHz

THD

Total harmonic distortion

fIN = 170 MHz

dBc

fIN = 220 MHz

fIN = 307 MHz

fIN = 350 MHz

fIN = 40 MHz

fIN = 70 MHz

fIN = 140 MHz

HD2

Second-order harmonic distortion(3) (4)

fIN = 170 MHz

78.5

dBc

fIN = 220 MHz

fIN = 307 MHz

fIN = 350 MHz

fIN = 40 MHz

fIN = 70 MHz

fIN = 140 MHz

HD3

Third-order harmonic distortion

fIN = 170 MHz

79.5

dBc

fIN = 220 MHz

fIN = 307 MHz

fIN = 350 MHz

fIN = 40 MHz

100

fIN = 70 MHz

100

fIN = 140 MHz

Worst spur

fIN = 170 MHz

dBc

(non HD2, HD3)

fIN = 220 MHz,

fIN = 307 MHz

fIN = 350 MHz

DNL

Differential nonlinearity

–0.95

±0.5

LSBs

INL

Integral nonlinearity

±1.5

±5.25

LSBs

Recovery to within 1% (of final value) for

Clock

Input overload recovery

6-dB output overload with sine-wave input

cycle

with a full-scale, 220-MHz signal on

Crosstalk

aggressor channel and no signal on victim

channel

PSRR

AC power-supply rejection ratio

For 50-mVPP signal on AVDD supply

< 30

(3)

Phase and amplitude imbalances onboard must be minimized to obtain good performance.

(4)

The minimum value across temperature is ensured by bench characterization.

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