MAX189BCSLASHD datasheet(4/20 Pages) MAXIM

4 / 20 page

+5V, Low-Power, 12-Bit Serial ADCs

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ELECTRICAL CHARACTERISTICS (continued)

(VDD = +5V ±5%; GND = 0V; unipolar input mode; 75ksps, fCLK = 4.0MHz, external clock (50% duty cycle); MAX187—internal

reference: VREF = 4.096V, 4.7µF capacitor at REF pin, or MAX189—external reference: VREF = 4.096V applied to REF pin, 4.7µF

capacitor at REF pin; TA = TMIN to TMAX; unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DIGITAL INPUTS (SCLK,

CS, SHDN)

SCLK,

CS Input High Voltage

VINH

2.4

SCLK,

CS Input Low Voltage

VINL

0.8

SCLK,

CS Input Hysteresis

VHYST

0.15

SCLK,

CS Input Leakage

IIN

VIN = 0V or VDD

±1

µA

SCLK,

CS Input Capacitance

CIN

(Note 4)

SHDN Input High Voltage

VINSH

VDD - 0.5

SHDN Input Low Voltage

VINSL

0.5

SHDN Input Current

IINS

SHDN = VDD or 0V

±4.0

µA

SHDN Input Mid Voltage

VIM

1.5

VDD -1.5

SHDN Voltage, Floating

VFLT

SHDN = open

2.75

SHDN Maximum Allowed

SHDN = open

-100

100

Leakage, Mid Input

DIGITAL OUTPUT (DOUT)

Output Voltage Low

VOL

ISINK = 5mA

0.4

ISINK = 16mA

0.3

Output Voltage High

VOH

ISOURCE = 1mA

Three-State Leakage Current

CS = 5V

±10

µA

Three-State Output

COUT

CS = 5V (Note 4)

Capacitance

POWER REQUIREMENTS

Supply Voltage

VDD

4.75

5.25

Supply Current

Operating mode

MAX187

1.5

2.5

IDD

MAX189

1.0

2.0

Power-down mode

µA

VDD = +5V, ±5%; external reference, 4.096V;

Power-Supply Rejection

PSR

full-scale input (Note 6)

±0.06

±0.5

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