12-Bit Serial-Output Temperature Sensors

with 5-Channel ADC

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3

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DIGITAL INPUTS

Input Voltage Low

0.8

V

Input Voltage High

V

Input Hysteresis

0.2

V

Input Leakage Current

1

µA

Input Capacitance

16

pF

DIGITAL OUTPUTS

V

Output Low Voltage

0.6

V

Output High Voltage

V

Three-State Output Leakage

Current

±10

µA

Three-State Output

Capacitance

15

pF

POWER REQUIREMENTS

MAX1298

4.75

5.25

Positive Supply Voltage

MAX1299

2.7

3.6

V

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)

Shutdown, SCLK = GND

2

10

µA

Power-Supply Rejection Ratio

PSRR

(Note 7)

50

65

dB

INTERNAL VOLTAGE REFERENCE CHARACTERISTICS

MAX1298

2.494

2.50

2.506

Reference Voltage

MAX1299

1.197

1.20

1.203

V

Reference Tempco

±20

ppm/

°C

Output Short-Circuit Current

1.25

mA

Capacitive Bypass at REF

0.1

µF

MAX1298

130

REF Output Noise

MAX1299

65

MAX1298

+3.0

REF Line Regulation

MAX1299

+0.2

mV/V

MAX1298

4

10

REF Load Regulation

0 to 100

µA output current

(Note 8)

MAX1299

2

10

µV/µA