Rainbow-electronics MAX1208 Bedienungsanleitung PDF herunterladen (Seite 4)

MAX1208

12-Bit, 80Msps, 3.3V ADC

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= 3.3V, OV

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

= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,

G/T = low, f

CLK

= 80MHz (50% duty cycle), 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

REFN Output Voltage V

REFN

/ 2) - (V

REFIN

/ 4)

1.138

COM Output Voltage V

COM

/ 2

1.60 1.65 1.70

Differential Reference Output

Voltage

REF

= V

REFP

- V

REFN

0.969 1.024 1.069

Differential Reference

Temperature Coefficient

±25

ppm/°C

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

Input Resistance R

CLK

Figure 5 5 kΩ

Input Capacitance C

CLK

2pF

DIGITAL INPUTS (CLKTYP, G/T, PD)

Input High Threshold V

0.8 x

1 2 3 4 5 6 7 8 9 ... 26 27

12-Bit, 80Msps, 3.3V ADC 1

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