ADM1024ARU datasheet(2/28 Pages) AD

2 / 28 page

–2–

REV. 0

ADM1024–SPECIFICATIONS1, 2(T

A = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted)

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

POWER SUPPLY

Supply Voltage, VCC

2.8

3.30

5.5

Supply Current, ICC

1.4

2.6

Interface Inactive, ADC Active

1.0

ADC Inactive, DAC Active

145

µA

Shutdown Mode

TEMPERATURE-TO-DIGITAL CONVERTER

Internal Sensor Accuracy

±3

°C0°C ≤ TA ≤ 100°C

±2

°CTA = 25°C

Resolution

±1

°C

External Diode Sensor Accuracy

±5

°C0°C ≤ TA ≤ 100°C

±3

°C25°C

Resolution

±1

°C

Remote Sensor Source Current

110

150

µA

High Level

6.5

µA

Low Level

ANALOG-TO-DIGITAL CONVERTER

(INCLUDING MUX AND ATTENUATORS)

Total Unadjusted Error, TUE (12 VIN)

±4

(See Note 3)

TUE (AIN, VCCP, 2.5 VIN, 5 VIN)

±3%

Differential Nonlinearity, DNL

±1

LSB

Power Supply Sensitivity

±1

%/V

Conversion Time (Analog Input or Int. Temp)

754.8

856.8

µs0°C ≤ TA ≤ 100°C4

Conversion Time (External Temperature)

9.6

(See Note 4)

Input Resistance (2.5 V, 5 V, 12 V, VCCP1, VCCP2)

100

140

200

Ω

Input Resistance (AIN1, AIN2)

Ω

ANALOG OUTPUT

Output Voltage Range

2.5

Total Unadjusted Error, TUE

±3%

IL = 2 mA

Full-Scale Error

±1

±5%

Zero-Scale Error

LSB

No Load

Differential Nonlinearity, DNL

±1

LSB

Monotonic by Design

Integral Nonlinearity

±1

LSB

Output Source Current

Output Sink Current

FAN RPM-TO-DIGITAL CONVERTER

Accuracy

±12

°C ≤ T

≤ 100°C

Full-Scale Count

255

FAN1 and FAN2 Nominal Input RPM

8800

rpm

Divisor = 1, Fan Count = 153

4400

rpm

Divisor = 2, Fan Count = 153

2200

rpm

Divisor = 3, Fan Count = 153

1100

rpm

Divisor = 4, Fan Count = 153

Internal Clock Frequency

19.8

22.5

25.2

kHz

°C ≤ T

≤ 100°C

DIGITAL OUTPUTS NTEST_OUT

Output High Voltage, VOH

2.4

IOUT = +3.0 mA, VCC = 2.85 V – 3.60 V

Output Low Voltage, VOL

0.4

IOUT = –3.0 mA, VCC = 2.85 V – 3.60 V

OPEN-DRAIN DIGITAL OUTPUTS

(See Note 6)

(INT,

THERM, RESET)

Output Low Voltage, VOL

0.4

IOUT = –3.0 mA, VCC = 3.60 V

High Level Output Current, IOH

0.1

100

µAVOUT = VCC

RESET and CI Pulsewidth

OPEN-DRAIN SERIAL DATA BUS OUTPUT

(SDA)

Output Low Voltage, VOL

0.4

IOUT = –3.0 mA, VCC = 2.85 V – 3.60 V

High Level Output Current, IOH

0.1

100

µAVOUT = VCC

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