MAX31865 Просмотр технического описания (PDF) - Maxim Integrated

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MAX31865

RTD-to-Digital Converter

Maxim Integrated 

MAX31865

RTD-to-Digital Converter

ELECTRICAL CHARACTERISTICS (continued)

(3.0V P VDD P 3.6V, TA = -40NC to +125NC, unless otherwise noted. Typical values are TA= +25NC, VDD = VDVDD = 3.3V.) (Notes 2

and 3)

PARAMETER

SYMBOL

CONDITIONS

MIN

ADC Common-Mode Input

Range

Input Leakage Current

Bias Voltage

Bias Voltage Output Current

Bias Voltage Load Regulation

Bias Voltage Startup Time

0

RTDIN+, RTDIN-, 0NC to +70NC, on-state

RTDIN+, RTDIN-, -40NC to +85NC, on-state

RTDIN+, RTDIN-, -40NC to 100NC, on-state

VBIAS

1.95

IOUT

0.2

IOUT P 5.75mA

(Note 4)

ADC Full-Scale Error

ADC Integral Nonlinearity

ADC Offset Error

Differential Input, endpoint fit, 0.3 x VBIAS

P VREF P VBIAS

-3

Noise (over Nyquist Bandwidth)

Input referred

Common-Mode Rejection

50/60Hz Noise Rejection

Fundamental and harmonics

Continuous conversion (60Hz notch)

Temperature Conversion Time

(Note 5)

tCONV

Single conversion (60Hz notch)

Single conversion (50Hz notch)

Continuous conversion (50Hz notch)

Automatic Fault Detection Cycle

Time

From CS high to cycle complete

Power-Supply Rejection

Power-Supply Current (Note 6)

IDD

Shutdown

Bias off, ADC off

IDD

Bias on, active conversion

Power-On Reset Voltage

Threshold

2

Power-On Reset Voltage

Hysteresis

Input Capacitance

Input Leakage Current

Output High Voltage

CIN

IL

VOH

Logic inputs

Logic inputs

IOUT = -1.6mA

-1

VDVDD

- 0.4

Output Low Voltage

VOL

IOUT = 1.6mA

TYP MAX UNITS

2

5

14

2.00

30

±1

VBIAS

V

nA

2.06

V

5.75

mA

mV/mA

10

ms

LSB

±1

LSB

+3

LSB

150

FV RMS

90

dB

82

dB

16.7 17.6

52

55

ms

62.5

66

20

21

550 600

Fs

1

LSB/V

1.5

3

mA

2

3.5

mA

2.27

V

120

mV

6

pF

+1

FA

V

0.4

V

Maxim Integrated

  3

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