ADT7466 Datasheet, PDF (3/48 Pages) Analog Devices – dBCool Remote Thermal Controller and Voltage Monitor

ADT7466
SPECIFICATIONS
TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted.¹
Table 1.
Parameter
Min Typ Max Unit Test Conditions/Comments
POWER SUPPLY
Supply Voltage
3.0 3.3 5.5
V
Supply Current, ICC
1.4 3
mA Interface inactive, ADC active
30
70
µA Standby mode, digital inputs low
TEMPERATURE-TO-DIGITAL
CONVERTER
Local Sensor Accuracy
±1
°C 20°C ≤ TA ≤ 60°C; VCC = 3.3 V
±3
°C −40°C ≤ TA ≤ +125°C; VCC = 3.3 V
Resolution
0.25
°C
Remote Diode Sensor Accuracy
±1
°C 20°C ≤ TA ≤ 60°C; −40°C ≤ TD ≤ +125°C; VCC = 3.3 V
±3
°C −40°C ≤TA ≤ +105°C; −40°C ≤ TD ≤ +125°C; VCC = 3.3 V
±5
°C −40°C ≤ TA ≤ +125°C; −40°C ≤ TD ≤ +125°C
Resolution
0.25
°C
Remote Sensor Source Current
192
µA High level
72
µA Mid level
12
µA Low level
Series Resistance Cancellation
0
2
kΩ Maximum resistance in series with thermal diode that can be
cancelled out
THERMISTOR-TO-DIGITAL CONVERTER
Temperature Range
30
100 °C Range over which specified accuracy is achieved. Wider range
can be used with less accuracy.
Resolution
0.25
°C
Accuracy
±2
°C Using specified thermistor and application circuit over specified
temperature range
ANALOG-TO-DIGITAL CONVERTER
Input Voltage Range
0
VREF
V
VREF = 2.25V
Total Unadjusted Error (TUE)
±1
±2.5 %
Differential Nonlinearity (DNL)
±1
LSB
Power Supply Sensitivity
±1
%/V
Conversion Time (AIN Input)
8.30 8.65 ms Averaging enabled
Conversion Time (Local
Temperature)
8.63 8.99 ms Averaging enabled
Conversion Time (Remote
Temperature)
35.22 36.69 ms Averaging enabled
Conversion Time (VCC)
7.93 8.26 ms Averaging enabled
Total Monitoring Cycle Time
68.38 71.24 ms Averaging enabled, Pin 11 and Pin 12 configured for AIN/TH
monitoring (see Table 15)
Total Monitoring Cycle Time
87
90.63 ms Averaging enabled, Pin 11 and Pin 12 configured for REM2
monitoring (see Table 15)
FAN RPM-TO-DIGITAL CONVERTER
Accuracy
±4
%
Full-Scale Count
65,535
Nominal Input RPM
109
RPM Fan count = 0xBFFF
329
RPM Fan count = 0x3FFF
5000
RPM Fan count = 0x0438
10000
RPM Fan count = 0x021C
Internal Clock Frequency
78.64 81.92 85.12 kHz
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