ADT7468ARQ-REEL7 查看數據表（PDF） - Analog Devices

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ADT7468ARQ-REEL7

dBCool™ Remote Thermal Controller and Voltage Monitor

Analog Devices 

ADT7468

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

−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

Conversion Time (Voltage Input)

Conversion Time (Local Temperature)

Conversion Time (Remote Temperature)

Total Monitoring Cycle Time

Total Monitoring Cycle Time

Input Resistance

FAN RPM-TO-DIGITAL CONVERTER

Accuracy

±0.1

11

12

38

145

19

40

70

80

140

Full-Scale Count

Nominal Input RPM

109

329

5000

10000

Max

5.5

3

20

±1.5

+2

+2

±1.5

+2

+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

−40°C ≤ TA ≤ +100°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

%

For 12 V and 5 V channels

%

For all other channels

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

94.5

kHz 0°C ≤ TA ≤ 70°C, VCC = 3.3 V

83.7

90

96.3

kHz −40°C ≤ TA ≤ +120°C, VCC = 3.3 V

81

90

99

kHz −40°C ≤ TA ≤ +120°C, VCC = 5.5 V

Rev. 0 | Page 3 of 80

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