Rainbow-electronics MAX1121 Manual do Utilizador descarregar pdf (Página 4)

MAX1121

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

with LVDS Outputs for Wideband Applications

4 _______________________________________________________________________________________

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

Output Offset Voltage OV

1.125 1.310

LVCMOS DIGITAL INPUTS (CLKDIV, T/B)

Digital Input Voltage Low V

0.2 x

Digital Input Voltage High V

0.8 x

TIMING CHARACTERISTICS

CLK to Data Propagation Delay t

PDL

Figure 4 1.5 ns

CLK to DCLK Propagation Delay

CPDL

Figure 4

2.85

Data Valid to DCLK Rising Edge

CPDL

PDL

Figure 4 (Note 2)

0.92 1.35 1.86

LVDS Output Rise-Time t

RISE

20% to 80%, C

= 5pF

460

LVDS Output Fall-Time t

FALL

20% to 80%, C

= 5pF

460

Output Data Pipeline Delay

LATENCY

Clock

cycles

POWER REQUIREMENTS

Analog Supply Voltage Range AV

1.70 1.80 1.90

Digital Supply Voltage Range OV

1.70 1.80 1.90

Analog Supply Current

AVCC

= 100MHz

220 290

Digital Supply Current I

OVCC

= 100MHz 45 75 mA

Analog Power Dissipation P

DISS

= 100MHz

477 657

Offset 1.6

mV/V

Power-Supply Rejection Ratio

(Note 3)

PSRR

Gain 1.9

%FS/V

Note 1: Static linearity and offset parameters are computed from a best-fit straight line through the code transition points. The full-

scale range is defined as 1023 x slope of the line.

Note 2: Parameter guaranteed by design and characterization; T

= T

MIN

to T

MAX

Note 3: PSRR is measured with both analog and digital supplies connected to the same potential.

1 2 3 4 5 6 7 8 9 ... 16 17

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