MAX1121 datasheet(3/17 Pages) MAXIM

3 / 17 page

1.8V, 8-Bit, 250Msps Analog-to-Digital Converter

with LVDS Outputs for Wideband Applications

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(AVCC = OVCC = 1.8V, AGND = OGND = 0, fSAMPLE = 250MHz, differential sine-wave clock input drive, 0.1µF capacitor on REFIO,

internal reference, digital output pins differential RL = 100Ω ±1%, CL = 5pF, TA = TMIN to TMAX, unless otherwise noted. ≥25°C guar-

anteed by production test, <25°C guaranteed by design and characterization. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Clock Duty Cycle

Set by clock management circuit

40 to 60

Aperture Delay

tAD

350

Aperture Jitter

tAJ

0.2

psRMS

CLOCK INPUTS (CLKP, CLKN)

Differential Clock Input Amplitude

(Note 2)

200

500

mVP-P

Clock Input Common-Mode

Voltage Range

1.25

±0.25

Clock Differential Input

Resistance

RCLK

±25%

Ω

Clock Differential Input

Capacitance

CCLK

5pF

DYNAMIC CHARACTERISTICS (at -0.5dBFS)

fIN = 10MHz, TA ≥ +25°C

47.2

48.9

fIN = 100MHz, TA ≥ +25°C

46.2

48.8

fIN = 180MHz

48.8

Signal-to-Noise Ratio

SNR

fIN = 500MHz

48.7

fIN = 10MHz, TA ≥ +25°C

47.1

48.8

fIN = 100MHz, TA ≥ +25°C

46.1

48.7

fIN = 180MHz

48.7

Signal-to-Noise

and Distortion

SINAD

fIN = 500MHz

48.6

fIN = 10MHz, TA ≥ +25°C60

fIN = 100MHz, TA ≥ +25°C59

fIN = 180MHz

69.1

Spurious-Free

Dynamic Range

SFDR

fIN = 500MHz

63.8

dBc

fIN = 10MHz

-74.6

fIN = 100MHz

-68.4

fIN = 180MHz

-69.1

Worst Harmonics

(HD2 or HD3)

fIN = 500MHz

-63.8

dBc

IMD100

fIN1 = 99MHz at -7dBFS,

fIN2 = 101MHz at -7dBFS

-70

Two-Tone Intermodulation

Distortion

IMD500

fIN1 = 498.5MHz at -7dBFS,

fIN2 = 502.5MHz at -7dBFS

-56

dBc

LVDS DIGITAL OUTPUTS (D0P/N–D7P/N, DCLKP/N)

Differential Output Voltage

|VOD|

250

400

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