MAX31865 Просмотр технического описания (PDF) - Maxim Integrated
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MAX31865 Datasheet PDF : 25 Pages
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MAX31865
RTD-to-Digital Converter
(VDD = VDVDD = 3.3V, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
(ADC AUTO CONVERSION MODE)
4
3
ANALOG IDD
(BIAS PIN UNLOADED)
2
1
DIGITAL IDD
0
-50
0
50
100
150
TEMPERATURE (°C)
LEAKAGE CURRENT PER PIN vs. TEMPERATURE
(1 VOLT APPLIED TO FORCE+, FORCE2, RTDIN+, RTDIN- PINS)
140
120
100
80
60
40
20
0
50
75
100
125
150
TEMPERATURE (°C)
ADC CONVERSION ERROR vs. RTD RESISTANCE
0.488
(4kΩ RREF, 4-WIRE CONNECTION)
MAX31865 toc05
0.244
0
-0.244
-40°C
+25°C
+100°C
˜ ±0.1°C
ERROR
-0.488
0
500 1000 1500 2000 2500 3000 3500
RRTD (Ω)
Maxim Integrated
Typical Operating Characteristics
SUPPLY CURRENT vs. TEMPERATURE
(ADC NORMALLY OFF MODE)
4
3
ANALOG IDD
2
(BIAS PIN UNLOADED)
1
DIGITAL IDD
0
-50
0
50
100
150
TEMPERATURE (°C)
SINC FILTER OPERATION
INPUT FREQUENCY vs. NOISE RESPONSE
20
0
-20
50Hz 60Hz
-40
-60
-80
-100
10
50
90
130
170
INPUT NOISE FREQUENCY (Hz)
ADC CONVERSION ERROR vs. RTD RESISTANCE
0.488
(400Ω RREF, 4-WIRE CONNECTION)
MAX31865 toc06
0.244
0
-0.244
+25°C
-40°C
+100°C
˜ ±0.1°C
ERROR
-0.488
0
50 100 150 200 250 300 350
RRTD (Ω)
6
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