ADT7467 Просмотр технического описания (PDF) - Analog Devices
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ADT7467 Datasheet PDF : 81 Pages
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ADT7467
SPECIFICATIONS
TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted.
All voltages are measured with respect to GND, unless otherwise specified. Typicals are at TA = 25°C and represent most likely parametric
norm. Logic inputs accept input high voltages up to VMAX even when device is operating down to VMIN. Timing specifications are tested at
logic levels of VIL = 0.8 V for a falling edge and VIH = 2.0 V for a rising edge. SMBus timing specifications are guaranteed by design and are
not production tested.
Table 1.
Parameter
POWER SUPPLY
Supply Voltage
Supply Current, ICC
Min
Typ
3.0
3.3
TEMP-TO-DIGITAL CONVERTER
Local Sensor Accuracy
−3.5
−4
Resolution
0.25
Remote Diode Sensor Accuracy
±0.5
−3.5
−4.5
Resolution
0.25
Remote Sensor Source Current
6
36
96
ANALOG-TO-DIGITAL CONVERTER (INCLUDING MUX AND ATTENUATORS)
Total Unadjusted Error (TUE)
Differential Nonlinearity (DNL)
Power Supply Sensitivity
±0.1
Conversion Time (Voltage Input)
11
Conversion Time (Local Temperature)
12
Conversion Time (Remote Temperature)
38
Total Monitoring Cycle Time
145
Total Monitoring Cycle Time
19
Input Resistance
40
80
80
140
FAN RPM-TO-DIGITAL CONVERTER
Accuracy
Full-Scale Count
Nominal Input RPM
109
329
5000
10000
Max
5.5
3
20
±1.5
+2
+2
±1.5
+2
+2
±1.5
±1
100
200
±5
±7
±10
65,535
Unit Test Conditions/Comments
V
mA Interface inactive, ADC active
µA Standby mode
°C
0°C ≤ TA ≤ 70°C
°C
−40°C ≤ TA ≤ +100°C
°C
−40°C ≤ TA ≤ +120°C
°C
°C
0°C ≤ TA ≤ 70°C; 0°C ≤ TD ≤ 120°C
°C
0°C ≤ TA ≤ 105°C; 0°C ≤ TD ≤ 120°C
°C
−40°C ≤ TA ≤ +120°C; 0°C ≤ TD ≤ +120°C
°C
µA First current
µΑ Second current
µΑ Third current
%
LSB 8 bits
%/V
ms Averaging enabled
ms Averaging enabled
ms Averaging enabled
ms Averaging enabled
ms Averaging disabled
kΩ
For VCC channel
kΩ For all other channels
%
0°C ≤ TA ≤ 70°C, 3.3 V
%
−40°C ≤ TA ≤ +120°C, 3.3 V
%
−40°C ≤ TA ≤ +120°C, 5.5 V
RPM Fan count = 0xBFFF
RPM Fan count = 0x3FFF
RPM Fan count = 0x0438
RPM Fan count = 0x021C
Internal Clock Frequency
85.5
90
83.7
90
81
90
94.5
kHz 0°C ≤ TA ≤ 70°C, Vcc = 3.3V
96.3
kHz −40°C ≤ TA ≤ +120°C, VCC = 3.3 V
99
kHz −40°C ≤ TA ≤ +120°C, VCC = 5.5 V
Rev. 0| Page 3 of 80
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