ADM1026

http://onsemi.com

7

Parameter

Unit

Max

Typ

Min

Test Conditions/Comments

SERIAL BUS TIMING

4.0

ms

4.7

ms

4.0

ms

1000

ns

300

ns

250

ns

300

ns

1. All voltages are measured with respect to GND, unless otherwise specified.

5. Total analog monitoring cycle time is nominally 273 ms, made up of 18 ms × 11.38 ms measurements on analog input and internal temperature

channels, and 2 ms × 34.13 ms measurements on external temperature channels.

6. The total fan count is based on two pulses per revolution of the fan tachometer output. The total fan monitoring time depends on the number

of fans connected and the fan speed. See the Fan Speed Measurement section for more details.

7. ADD is a three−state input that may be pulled high, low, or left open circuit.

8. Logic inputs accept input high voltages up to 5.0 V even when device is operating at supply voltages below 5.0 V.

9. Endurance is qualified to 100,000 cycles as per JEDEC Std. 22 method A117, and measured at −40°C, +25°C, and +85°C. Typical endurance

at +25°C is 700,000 cycles.

energy of 0.6 V derates with junction temperature as shown in Figure 15.

Figure 2. Serial Bus Timing Diagram

P

S

PS

SCL

SDA