Rainbow-electronics MAX6628 Manual de usuario descargar pdf (Pagina 4)

MAX6627/MAX6628

Remote ±1°C Accurate Digital Temperature

Sensors with SPI-Compatible Serial Interface

4 _______________________________________________________________________________________

100

150

200

250

300

3.0 4.03.5 4.5 5.0 5.5

AVERAGE OPERATING CURRENT

vs. SUPPLY VOLTAGE

MAX6627/8 toc01

SUPPLY VOLTAGE (V)

AVERAGE OPERATING CURRENT (µA)

MAX6627

MAX6628

-3

-2

-1

-55 -5-30 20 45 70 95 120 145

TEMPERATURE ERROR vs. TEMPERATURE

MAX6627/8 toc02

TEMPERATURE (

TEMPERATURE ERROR (°C)

= +25

= 0

MAX6627

= +70

0.6

1.0

0.8

1.4

1.2

1.8

1.6

2.0

2.4

2.2

2.6

-55 -5 20 45-30 70 95 120 145

POWER-ON-RESET THRESHOLD

vs. TEMPERATURE

MAX6627/8 toc03

TEMPERATURE (

POWER-ON-RESET THRESHOLD (V)

Typical Operating Characteristics

= +3.3V, T

= +25°C, unless otherwise noted.)

PIN NAME FUNCTION

1 GND Ground

2 DXN

Combined Current Sink and ADC Negative Input for Remote Diode. DXN is normally biased to a diode

voltage above ground.

3 DXP Combined Current Source and ADC Positive Input for Remote Diode

Supply Voltage Input. Bypass with a 0.1µF to GND.

5 SCK SPI Clock Input

6 CS

Chip Select Input. Pulling CS low initiates an idle state, but the SPI interface is still enabled. A rising edge

of CS initiates the next conversion.

7 SO SPI Data Output

8 N.C. No Connect. Can be connected to GND for improved thermal conductivity.

Pin Description

10 100k 10M1k100 10k 1M 100M

TEMPERATURE ERROR vs.

POWER-SUPPLY NOISE FREQUENCY

MAX6627/8 toc04

FREQUENCY (Hz)

TEMPERATURE ERROR (°C)

= SQUARE WAVE

APPLIED TO V

WITH NO

0.1

F CAPACITOR

= 250mVp-p

100

125

-2 20 4 6 8 10 12 14

RESPONSE TO THERMAL SHOCK

MAX6627/8 toc05

TIME (s)

TEMPERATURE (°C)

MAX6627/8 toc06

CAPACITANCE (pF)

TEMPERATURE ERROR (°C)

0 10,0005000 15,000 20,000

TEMPERATURE ERROR

vs. DXP/DXN CAPACITANCE

1 2 3 4 5 6 7 8 9

MAX6627/MAX6628 1

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Rainbow-electronics MAX6628 Manual de usuario Pagina 4

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