adm9240 Analog Devices, Inc., adm9240 Datasheet - Page 3

• Manufacturer Part Number: adm9240
• Description: Low Cost Microprocessor System Hardware Monitor
• Manufacturer: Analog Devices, Inc.

Parameter
OPEN-DRAIN SERIAL DATA BUS
SERIAL BUS DIGITAL INPUTS
DIGITAL INPUT LOGIC LEVELS
DIGITAL INPUT CURRENT
SERIAL BUS TIMING
NOTES
1
2
3
4
5
6
7
Specifications subject to change without notice.
REV. 0
All voltages are measured with respect to GND, unless otherwise noted.
Typicals are at T
TUE (Total Unadjusted Error) includes Offset, Gain and Linearity errors of the ADC, multiplexer and on-chip input attenuators, including an external series input
protection resistor value between zero and 1 k .
Total monitoring cycle time is the time taken to measure all six analog inputs plus the temperature sensor.
The total fan count is based on 2 pulses per revolution of the fan tachometer output.
A0 and A1 have internal 75 k pull-down.
Timing specifications are tested at logic levels of V
OUTPUT (SDA)
High Level Output Current, I
(SCL, SDA)
(A0, A1, CI, RESET, VID0 – VID4,
NTEST_IN
Input High Current, I
Input High Current, A0, A1, I
Input Low Current, I
Input Capacitance, C
Clock Frequency, f
Glitch Immunity, t
Bus Free Time, t
Start Setup Time, t
Start Hold Time, t
SCL Low Time, t
SCL High Time, t
SCL, SDA Rise Time, t
SCL, SDA Fall Time, t
Data Setup Time, t
Data Hold Time, t
FAN1, FAN2)
Output Low Voltage, V
Input High Voltage, V
Input Low Voltage, V
Hysteresis
Input High Voltage, V
Input Low Voltage, V
Input High Voltage, V
Input Low Voltage, V
Input High Voltage, V
Input High Voltage, V
A
= +25 C and represent most likely parametric norm. Shutdown current typ is measured with V
BUF
LOW
HIGH
HD;STA
HD;DAT
SW
SCLK
SU;STA
SU;DAT
IL
IN
IH
7
F
IL
IL
IL
R
IH
IH
IH
IH
IH
OL
OH
IH
IL
= 0.3
V
CC
Min
0.7
2.4
2.0
2.4
2.0
–1
–200
1.3
600
600
1.3
0.6
100
for a falling edge and V
V
CC
Typ
0.1
500
75
20
–3–
IH
Max
0.4
0.4
100
0.3
0.8
0.4
1
400
50
300
300
900
= 0.7
V
V
CC
CC
for a rising edge.
mV
Units
V
V
V
V
V
V
V
V
V
V
pF
kHz
ns
ns
ns
ns
ns
ns
A
A
A
A
s
s
s
s
CC
= 3.3 V.
Test Conditions/Comments
I
V
I
V
V
V
V
V
V
V
V
V
V
V
See Figure 1
See Figure 1
See Figure 1
See Figure 1
See Figure 1
See Figure 1
See Figure 1
See Figure 1
See Figure 1
See Figure 1
See Figure 1
OUT
OUT
CC
CC
OUT
CC
CC
CC
CC
CC
CC
IN
IN
IN
= V
= V
= 0
= 4.25 V–5.75 V
= 2.85 V–3.45 V
= 4.25 V–5.75 V
= 4.25 V–5.75 V
= 2.85 V–3.45 V
= 2.85 V–3.45 V
= 4.25 V–5.75 V
= 2.85 V–3.45 V
= –3.0 mA,
= –3.0 mA
= V
CC
CC
CC
(Note 6)
ADM9240