ADM1026
SPECIFICATIONS
Table 1. T
A
= T
MIN
to T
MAX
, V
CC
= V
MIN
to V
MAX
, unless otherwise noted.
Parameter
POWER SUPPLY
Supply Voltage, 3.3 V STBY, 3.3 V MAIN
Supply Current, I
CC
TEMPERATURE-TO-DIGITAL CONVERTER
Internal Sensor Accuracy
Resolution
External Diode Sensor Accuracy
Resolution
Remote Sensor Source Current
ANALOG-TO-DIGITAL CONVERTER (including MUX and attenuators)
Total Unadjusted Error (TUE)
Differential Nonlinearity (DNL)
Power Supply Sensitivity
Conversion Time (Analog Input or Internal Temperature)
Conversion Time (External Temperature)
Input Resistance (+5 V
IN
, V
CCP
, A
IN0
− A
IN5
)
Input Resistance of +12 V
IN
pin
Input Resistance of −12 V
IN
pin
Input Resistance (A
IN6
− A
IN9
)
Input Resistance of V
BAT
pin
V
BAT
Current Drain (when measured)
V
BAT
Current Drain (when not measured)
ANALOG OUTPUT (DAC)
Output Voltage Range
Total Unadjusted Error (TUE)
Zero Error
Differential Nonlinearity (DNL)
Integral Nonlinearity
Output Source Current
Output Sink Current
REFERENCE OUTPUT
Output Voltage
Output Voltage
Load Regulation (I
SINK
= 2 mA)
Load Regulation (I
SOURCE
= 2 mA)
Short Circuit Current
Output Current Source
Output Current Sink
FAN RPM-TO-DIGITAL CONVERTER
Accuracy
Full-Scale Count
FAN0 to FAN7 Nominal Input RPM
Min
3.0
Typ
3.3
2.5
Max
5.5
4.0
±3
±1
±3
±1
90
5.5
±2
±1
±0.1
11.38
34.13
100
100
10
100
80
6
0–2.5
±5
1
±1
±0.5
2
1
1.8
2.47
1.82
2.50
0.15
0.15
25
2
2
1.84
2.53
Bit 2 of Register 07h = 0
Bit 2 of Register 07h = 1
I
L
= 2 mA
No load
Monotonic by design
12.06
36.18
120
115
12
120
100
0°C < T
D
< 100°C
High level
Low level
Test Conditions/Comments
Unit
V
mA
°C
°C
°C
°C
µA
µA
%
LSB
%/V
ms
ms
kΩ
kΩ
kΩ
MΩ
kΩ
nA
nA
V
%
LSB
LSB
LSB
mA
mA
V
V
%
%
mA
mA
mA
%
Divisor = 1, fan count = 153
Divisor = 2, fan count = 153
Divisor = 4, fan count = 153
Divisor = 8, fan count = 153
25
I
OUT
= 3.0 mA, V
CC
= 3.3 V
RPM
RPM
RPM
RPM
kHz
V
Interface inactive, ADC active
80
70
8
5
80
CR2032 battery life >10 years
V
CC
= 3.3 V
±12
255
8800
4400
2200
1100
22.5
Internal Clock Frequency
OPEN DRAIN O/Ps, PWM, GPIO0 to 16
Output High Voltage, V
OH
20
2.4
Rev. A | Page 3 of 56
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