ADM1026
Table 4. ELECTRICAL CHARACTERISTICS (TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted. (Note 1, 2, and 3))
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
FAN RPM-TO-DIGITAL CONVERTER (Note 6)
Accuracy
−
−
12
%
Full-scale Count
−
−
255
FAN0 to FAN7 Nominal Input RPM (Note 5)
Divisor = 1, fan count = 153
Divisor = 2, fan count = 153
Divisor = 4, fan count = 153
Divisor = 8, fan count = 153
−
8800
−
RPM
−
4400
−
−
2200
−
−
1100
−
Internal Clock Frequency
20
22.5
25
kHz
OPEN DRAIN O/Ps, PWM, GPIO0 to 16
Output High Voltage, VOH
High Level Output Leakage Current, IOH
Output Low Voltage, VOL
PWM Output Frequency
IOUT = 3.0 mA, VCC = 3.3 V
VOUT = VCC
IOUT = −3.0 mA, VCC = 3.3 V
2.4
−
−
V
−
0.1
1.0
mA
−
−
0.4
V
−
75
−
Hz
DIGITAL OUTPUTS (INT, RESETMAIN, RESETSTBY)
Output Low Voltage, VOL
RESET Pulse Width
IOUT = −3.0 mA, VCC = 3.3 V
−
−
0.4
V
140
180
240
ms
OPEN DRAIN SERIAL DATABUS OUTPUT (SDA)
Output Low Voltage, VOL
High Level Output Leakage Current, IOH
SERIAL BUS DIGITAL INPUTS (SCL, SDA)
IOUT = –3.0 mA, VCC = 3.3 V
VOUT = VCC
−
−
0.4
V
−
0.1
1.0
mA
Input High Voltage, VIH
Input Low Voltage, VIL
Hysteresis
2.2
−
−
V
−
−
0.8
V
−
500
−
mV
DIGITAL INPUT LOGIC LEVELS (ADD, CI, FAN 0 to 7, GPIO 0 to 16) (Note 7 and 8)
Input High Voltage, VIH
Input Low Voltage, VIL
Hysteresis (Fan 0 to 7)
RESETMAIN, RESETSTBY
VCC = 3.3 V
VCC = 3.3 V
VCC = 3.3 V
2.4
−
−
V
0.8
−
−
V
−
250
−
mV
RESETMAIN Threshold
Falling Voltage
2.89
2.94
2.97
V
RESETSTBY Threshold
Falling Voltage
3.01
3.05
3.10
V
RESETMAIN Hysteresis
−
60
−
mV
RESETSTBY Hysteresis
−
70
−
mV
DIGITAL INPUT CURRENT
Input High Current, IIH
Input Low Current, IIL
Input Capacitance, CIN
EEPROM RELIABILITY
VIN = VCC
VIN = 0
–1.0
−
−
mA
−
−
1.0
mA
−
20
−
pF
Endurance (Note 9)
100
700
−
kcycles
Data Retention (Note 10)
10
−
−
Years
SERIAL BUS TIMING
Clock Frequency, fSCLK
Glitch Immunity, tSW
Bus Free Time, tBUF
Start Setup Time, tSU; STA
See Figure 2 for All Parameters.
−
−
400
kHz
−
−
50
ns
4.7
−
−
ms
4.7
−
−
ms
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