Rainbow-electronics MAX1121 Manual do Utilizador descarregar pdf (Página 3)

MAX1121

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

with LVDS Outputs for Wideband Applications

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(AV

= OV

= 1.8V, AGND = OGND = 0, f

SAMPLE

= 250MHz, differential sine-wave clock input drive, 0.1µF capacitor on REFIO,

internal reference, digital output pins differential R

= 100Ω ±1%, C

= 5pF, T

= T

MIN

to T

MAX

, unless otherwise noted. ≥25°C guar-

anteed by production test, <25°C guaranteed by design and characterization. Typical values are at T

= +25°C.)

PARAMETER

SYMBOL

CONDITIONS MIN

TYP MAX

UNITS

Clock Duty Cycle Set by clock management circuit

40 to 60

Aperture Delay t

350 ps

Aperture Jitter t

0.2

RMS

CLOCK INPUTS (CLKP, CLKN)

Differential Clock Input Amplitude

(Note 2) 200 500

P-P

Clock Input Common-Mode

Voltage Range

1.25

±0.25

Clock Differential Input

Resistance

CLK

±25%

kΩ

Clock Differential Input

Capacitance

CLK

5pF

DYNAMIC CHARACTERISTICS (at -0.5dBFS)

= 10MHz, T

≥ +25°C

47.2 48.9

= 100MHz, T

≥ +25°C

46.2 48.8

= 180MHz

48.8

Signal-to-Noise Ratio SNR

= 500MHz

48.7

= 10MHz, T

≥ +25°C

47.1 48.8

= 100MHz, T

≥ +25°C

46.1 48.7

= 180MHz

48.7

Signal-to-Noise

and Distortion

SINAD

= 500MHz

48.6

= 10MHz, T

≥ +25°C6069

= 100MHz, T

≥ +25°C5968

= 180MHz

69.1

Spurious-Free

Dynamic Range

SFDR

= 500MHz

63.8

dBc

= 10MHz

-74.6

= 100MHz

-68.4

= 180MHz

-69.1

Worst Harmonics

(HD2 or HD3)

= 500MHz

-63.8

dBc

IMD

100

IN1

= 99MHz at -7dBFS,

IN2

= 101MHz at -7dBFS

-70

Two-Tone Intermodulation

Distortion

IMD

500

IN1

= 498.5MHz at -7dBFS,

IN2

= 502.5MHz at -7dBFS

-56

dBc

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

Differential Output Voltage |V

| 250 400 mV

1 2 3 4 5 6 7 8 ... 16 17

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