Rainbow-electronics MAX1211 Manual do Utilizador descarregar pdf (Página 4)

MAX1211

65Msps, 12-Bit, IF Sampling ADC

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= 3.3V, OV

= 2.0V, GND = 0, REFIN = REFOUT (internal reference), C

REFOUT

= 0.1µF, C

≈ 5pF at digital outputs, V

= -

0.5dBFS, CLKTYP = high, DCE = high, PD = low, G/T = low, f

CLK

= 65MHz (50% duty cycle), C

REFP

= C

REFN

= 0.1µF, 1µF in parallel with

10µF between REFP and REFN, C

COM

= 0.1µF in parallel with 2.2µF to GND, T

= -40°C to +85°C, unless otherwise noted. Typical values

are at T

= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

Source 1.0

Maximum COM Current I

COM

Sink 0.4

REFIN Input Resistance

>50

MΩ

UNBUFFERED EXTERNAL REFERENCE (REFIN = GND, V

REFP

, V

REFN

, and V

COM

are applied externally)

COM Input Voltage V

COM

/ 2

1.65

REFP Input Voltage V

REFP

- V

COM

0.512

REFN Input Voltage V

REFN

- V

COM

-0.512

Differential Reference Input

Voltage

REF

= V

REFP

- V

REFN

1.024

REFP Sink Current I

REFP

= 2.162V 1.1 mA

REFN Source Current I

REFN

= 1.138V 1.1 mA

COM Sink Current I

COM

0.3 mA

REFP, REFN Capacitance 13 pF

COM Capacitance 6pF

CLOCK INPUTS (CLKP, CLKN)

Single-Ended Input High

Threshold

CLKTYP = GND, CLKN = GND

0.8 x

Single-Ended Input Low

Threshold

CLKTYP = GND, CLKN = GND

0.2 x

Differential Input Voltage Swing CLKTYP = high 1.4

P-P

Differential Input Common-Mode

Voltage

CLKTYP = high

/ 2

DCE = OV

Minimum Clock Duty Cycle

DCE = GND 45

DCE = OV

Maximum Clock Duty Cycle

DCE = GND 65

Input Resistance R

CLK

Figure 4 5 kΩ

Input Capacitance C

CLK

2pF

DIGITAL INPUTS (CLKTYP, G/T, PD)

Input High Threshold V

0.8 x

Input Low Threshold V

0.2 x

= OV

±5

Input Leakage Current

= 0 ±5

µA

Input Capacitance C

DIN

5pF

1 2 3 4 5 6 7 8 9 ... 29 30

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