Rainbow-electronics MAX1299 Manual do Utilizador descarregar pdf (Página 3)

MAX1298/MAX1299

12-Bit Serial-Output Temperature Sensors

with 5-Channel ADC

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= 4.75V to 5.25V (MAX1298), V

= +2.7V to 3.6V (MAX1299), external reference, V

REF

= +2.5V (MAX1298), V

REF

= +1.2V

(MAX1299), f

SCLK

= 2.5MHz, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DIGITAL INPUTS

Input Voltage Low V

0.8 V

Input Voltage High V

D D

- 0.8

Input Hysteresis V

HYST

0.2 V

Input Leakage Current I

1 µA

Input Capacitance 16 pF

DIGITAL OUTPUTS V

Output Low Voltage V

SINK

= 5mA 0.6 V

Output High Voltage V

SOURCE

= 0.5mA

D D

- 0.6

Three-State Output Leakage

Current

OUT

±10 µA

Three-State Output

Capacitance

15 pF

POWER REQUIREMENTS

MAX1298

4.75 5.25

Positive Supply Voltage V

MAX1299 2.7 3.6

MAX1298 390

Ful l - on, vol tag e m easur em ents,

i nter nal r efer ence

MAX1299 350

MAX1298 310

Ful l - on, vol tag e m easur em ents,

exter nal r efer ence

MAX1299 280

MAX1298 440 500

Full-on, temperature measure-

ments, internal reference

MAX1299 400 500

MAX1298 360

Full-on, temperature measure-

ments, exter nal r efer ence

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

= 5V MAX1298

2.494 2.50 2.506

Reference Voltage V

REF

= 3V MAX1299

1.197 1.20 1.203

Reference Tempco

TC V

REF

±20

ppm/°C

Output Short-Circuit Current

1.25

Capacitive Bypass at REF 0.1 µF

MAX1298 130

REF Output Noise f

= 10Hz to 10kHz

MAX1299 65

µV

RMS

MAX1298 +3.0

REF Line Regulation

MAX1299

+0.2

mV/V

MAX1298 4 10

REF Load Regulation

0 to 100µA output current

(Note 8) MAX1299 2 10

µV/µA

1 2 3 4 5 6 7 8 ... 19 20

MAX1298/MAX1299 1

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