MAX1298 datasheet(3/20 Pages) MAXIM

3 / 20 page

12-Bit Serial-Output Temperature Sensors

with 5-Channel ADC

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD = 4.75V to 5.25V (MAX1298), VDD = +2.7V to 3.6V (MAX1299), external reference, VREF = +2.5V (MAX1298), VREF = +1.2V

(MAX1299), fSCLK = 2.5MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DIGITAL INPUTS

Input Voltage Low

VIL

0.8

Input Voltage High

VIH

VDD - 0.8

Input Hysteresis

VHYST

0.2

Input Leakage Current

IIN

µA

Input Capacitance

DIGITAL OUTPUTS

Output Low Voltage

VOL

ISINK = 5mA

0.6

Output High Voltage

VOH

ISOURCE = 0.5mA

VDD - 0.6

Three-State Output Leakage

Current

IOUT

±10

µA

Three-State Output

Capacitance

POWER REQUIREMENTS

MAX1298

4.75

5.25

Positive Supply Voltage

VDD

MAX1299

2.7

3.6

MAX1298

390

Full-on, voltage measurements,

internal reference

MAX1299

350

MAX1298

310

Full-on, voltage measurements,

external reference

MAX1299

280

MAX1298

440

500

Full-on, temperature measure-

ments, internal reference

MAX1299

400

500

MAX1298

360

Full-on, temperature measure-

ments, external reference

MAX1299

330

Standby, SCLK = GND

120

Standby-plus, SCLK = GND

190

Positive Supply Current (Note 6)

IDD

Shutdown, SCLK = GND

µA

Power-Supply Rejection Ratio

PSRR

(Note 7)

INTERNAL VOLTAGE REFERENCE CHARACTERISTICS

VDD = 5V

MAX1298

2.494

2.50

2.506

Reference Voltage

VREF

VDD = 3V

MAX1299

1.197

1.20

1.203

Reference Tempco

TC VREF

±20

ppm/

°C

Output Short-Circuit Current

1.25

Capacitive Bypass at REF

0.1

µF

MAX1298

130

REF Output Noise

fN = 10Hz to 10kHz

MAX1299

µVRMS

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