MAX1444 查看數據表（PDF） - Maxim Integrated

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MAX1444

10-Bit, 40Msps, 3.0V, Low-Power ADC with Internal Reference

Maxim Integrated 

10-Bit, 40Msps, 3.0V, Low-Power

ADC with Internal Reference

ELECTRICAL CHARACTERISTICS (continued)

(VDD = 3V; OVDD = 2.7V; 0.1µF and 1µF capacitors from REFP, REFN, and COM to GND; VREFIN = 2.048V; REFOUT connected to

REFIN through a 10kΩ resistor; VIN = 2VP-P (differential with respect to COM); CL = 10pF at digital outputs; fCLK = 40MHz; TA = TMIN

to TMAX, unless otherwise noted. ≥ +25°C guaranteed by production test, < +25°C guaranteed by design and characterization; typi-

cal values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX UNITS

Maximum REFP, COM Source

Current

ISOURCE

5

mA

Maximum REFP, COM Sink

Current

ISINK

-250

µA

Maximum REFN Source Current ISOURCE

250

µA

Maximum REFN Sink Current

ISINK

-5

mA

UNBUFFERED EXTERNAL REFERENCE (VREFIN = AGND, reference voltage applied to REFP, REFN, and COM)

REFP, REFN Input Resistance

RREFP, Measured between REFP and COM

4

RREFN and REFN and COM

kΩ

REFP, REFN, COM Input

Capacitance

CIN

15

pF

Differential Reference Input

Voltage Range

ΔVREF ΔVREF = VREFP - VREFN

1.024

±10%

V

COM Input Voltage Range

VCOM

VDD / 2

±10%

V

REFP Input Voltage

VREFP

VCOM +

ΔVREF /

V

2

REFN Input Voltage

VREFN

DIGITAL INPUTS (CLK, PD, OE)

Input High Threshold

CLK

VIH

PD, OE

Input Low Threshold

CLK

VIL

PD, OE

VCOM -

ΔVREF /

V

2

0.8 ×

VDD

0.8 ×

OVDD

V

0.2 ×

VDD

V

0.2 ×

OVDD

4 _______________________________________________________________________________________

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