ADT7468 datasheet(3/81 Pages) ONSEMI

Part #	ADT7468

Description	dBCool짰 Remote Thermal Controller and Voltage Monitor

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ADT7468

Rev. 3 | Page 3 of 81 | www.onsemi.com

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

norms. 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

Min

Typ

Max

Unit

Test Conditions/Comments

POWER SUPPLY

Supply Voltage

3.0

3.3

5.5

V

Supply Current, ICC

3

mA

Interface inactive, ADC active

20

µA

Standby mode

TEMP-TO-DIGITAL CONVERTER

Local Sensor Accuracy

±1.5

°C

0°C ≤ TA ≤ 70°C

−3.5

+2

°C

−40°C ≤ TA ≤ +100°C

−4

+2

°C

−40°C ≤ TA ≤ +120°C

Resolution

0.25

°C

Remote Diode Sensor Accuracy

±1.5

°C

0°C ≤ TA ≤ 70°C; 0°C ≤ TD ≤ 120°C

−3.5

+2

°C

−40°C ≤ TA ≤ +100°C; 0°C ≤ TD ≤ +120°C

−4.5

+2

°C

−40°C ≤ TA ≤ +120°C; 0°C ≤ TD ≤ +120°C

Resolution

0.25

°C

Remote Sensor Source Current

6

µA

First current

36

µΑ

Second current

96

µΑ

Third current

ANALOG-TO-DIGITAL CONVERTER

(INCLUDING MUX AND ATTENUATORS)

Total Unadjusted Error (TUE)

±2

%

For 12 V and 5 V channels

±1.5

%

For all other channels

Differential Nonlinearity (DNL)

±1

LSB

8 bits

Power Supply Sensitivity

±0.1

%/V

Conversion Time (Voltage Input)

11

ms

Averaging enabled

Conversion Time (Local Temperature)

12

ms

Averaging enabled

Conversion Time (Remote Temperature)

38

ms

Averaging enabled

Total Monitoring Cycle Time

145

ms

Averaging enabled

Total Monitoring Cycle Time

19

ms

Averaging disabled

Input Resistance

40

70

100

kΩ

For VCC channel

80

140

200

kΩ

For all other channels

FAN RPM-TO-DIGITAL CONVERTER

Accuracy

±5

%

0°C ≤ TA ≤ 70°C , 3.3 V

±7

%

−40°C ≤ TA ≤ +120°C , 3.3 V

±10

%

−40°C ≤ TA ≤ +120°C , 5.5 V

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

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

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