EVAL-ADM1026EB datasheet(3/56 Pages) AD

3 / 56 page

ADM1026

Rev. A | Page 3 of 56

SPECIFICATIONS1, 2, 3

Table 1. TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted.

Parameter

Min

Typ

Max

Test Conditions/Comments

Unit

POWER SUPPLY

Supply Voltage, 3.3 V STBY, 3.3 V MAIN

3.0

3.3

5.5

Supply Current, ICC

2.5

4.0

Interface inactive, ADC active

TEMPERATURE-TO-DIGITAL CONVERTER

Internal Sensor Accuracy

±3

°C

Resolution

±1

°C

External Diode Sensor Accuracy

±3

0°C < TD < 100°C

°C

Resolution

±1

°C

Remote Sensor Source Current

High level

µA

5.5

Low level

µA

ANALOG-TO-DIGITAL CONVERTER (including MUX and attenuators)

Total Unadjusted Error (TUE)4

±2

Differential Nonlinearity (DNL)

±1

LSB

Power Supply Sensitivity

±0.1

%/V

Conversion Time (Analog Input or Internal Temperature)5

11.38

12.06

Conversion Time (External Temperature)5

34.13

36.18

Input Resistance (+5 VIN, VCCP, AIN0 − AIN5)

100

120

kΩ

Input Resistance of +12 VIN pin

100

115

kΩ

Input Resistance of −12 VIN pin

kΩ

Input Resistance (AIN6 − AIN9)

MΩ

Input Resistance of VBAT pin4

100

120

kΩ

VBAT Current Drain (when measured)

100

CR2032 battery life >10 years

VBAT Current Drain (when not measured)

ANALOG OUTPUT (DAC)

Output Voltage Range

0–2.5

Total Unadjusted Error (TUE)

±5

IL = 2 mA

Zero Error

No load

LSB

Differential Nonlinearity (DNL)

±1

Monotonic by design

LSB

Integral Nonlinearity

±0.5

LSB

Output Source Current

Output Sink Current

REFERENCE OUTPUT

Output Voltage

1.8

1.82

1.84

Bit 2 of Register 07h = 0

Output Voltage

2.47

2.50

2.53

Bit 2 of Register 07h = 1

Load Regulation (ISINK = 2 mA)

0.15

Load Regulation (ISOURCE = 2 mA)

0.15

Short Circuit Current

VCC = 3.3 V

Output Current Source

Output Current Sink

FAN RPM-TO-DIGITAL CONVERTER6

Accuracy

±12

Full-Scale Count

255

FAN0 to FAN7 Nominal Input RPM5

8800

Divisor = 1, fan count = 153

RPM

4400

Divisor = 2, fan count = 153

RPM

2200

Divisor = 4, fan count = 153

RPM

1100

Divisor = 8, fan count = 153

RPM

Internal Clock Frequency

22.5

kHz

OPEN DRAIN O/Ps, PWM, GPIO0 to 16

Output High Voltage, VOH

2.4

IOUT = 3.0 mA, VCC = 3.3 V

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