MAX31785 Просмотр технического описания (PDF) - Maxim Integrated
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MAX31785 Datasheet PDF : 48 Pages
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6-Channel Intelligent Fan Controller
DC ELECTRICAL CHARACTERISTICS (continued)
(VDD = 2.7V to 5.5V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at VDD = 3.3V, TA = +25NC, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
ADC Internal Reference
Temperature Drift
-0.5
+0.5
%
ADC Internal Reference Initial
Accuracy (+25NC)
-1
+1
mV
ADC Full-Scale Input Voltage
ADC Measurement Resolution
ADC Bit Resolution
RS+ Input Resistance
ADC Integral Nonlinearity
ADC Differential Nonlinearity
ADC Offset
Internal Temperature
Measurement Error
VFS
VLSB
RIN
INL
DNL
VOFFSET
TA = -40NC to +85NC
1.213 1.225 1.237
V
300
FV
12
Bits
15
MI
Q8
LSB
Q1
LSB
Q2
LSB
-3
+3
NC
TA = 0NC to +60NC,
TDIODE = +60NC to +120NC
-1.5
+1.5
Remote Temperature
Measurement Error
(MAX31785 Error Only)
TA = 0NC to +60NC,
TDIODE = -45NC to +120NC
TA = -40NC to +85NC,
TDIODE = +60NC to +120NC
-1.75
-2.75
+1.75
NC
+2.75
Store Default All Time
Nonvolatile Log Write Time
Nonvolatile Log Delete Time
TA = -40NC to +85NC,
TDIODE = -45NC to +120NC
-3.0
+3.0
45
ms
12
ms
200
ms
Flash Endurance
NFLASH TA = +50NC
20,000
Write
Cycles
Data Retention
Voltage Sample Rate
RPM Sample Rate
Temperature Sample Rate
TA = +50NC
100
10
1000
1000
Years
ms
ms
ms
Device Startup Time
Measured from POR until monitoring
begins
12
ms
Fan PWM Frequency
Fan PWM Resolution
30
25,000 Hz
7
Bits
7
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