ADM1034ARQZ-REEL 查看數據表（PDF） - ON Semiconductor

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ADM1034ARQZ-REEL

Thermal Monitor and Fan Speed (RPM) Controller

ON Semiconductor 

ADM1034

ELECTRICAL CHARACTERISTICS (TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted. (Note 1)

Parameter

Test Conditions / Comments

Min

Typ

Max

Unit

AGTL + INPUT (THERM)

Input High Level

0.75 x

V

REF

Input Low Level

0.4

V

Tachometer Accuracy

Fan Speed Measurement Accuracy

±4.0

%

SERIAL BUS TIMING (Note 4)

Clock Frequency, fSCLK

See Figure 2

400

kHz

Glitch Immunity, tSW

See Figure 2

50

ns

Bus Free Time, tBUF

See Figure 2

1.3

ms

Start Setup Time, tSU:STA

See Figure 2

0.6

ms

Start Hold Time, tHD:STA

See Figure 2

0.6

ms

Stop Condition Setup Time tSU:STO

See Figure 2

0.6

ms

SCL Low Time, tLOW

See Figure 2

1.3

ms

SCL High Time, tHIGH

See Figure 2

0.6

ms

SCL, SDA Rise Time, tr

See Figure 2

1000

ns

SCL, SDA Fall Time, tf

See Figure 2

300

ns

Data Setup Time, tSU:DAT

See Figure 2

100

ns

Detect Clock Low Timeout, tTIMEOUT

See Note 5

25

35

ms

1. Typicals are at TA = 25°C and represent most likely parametric norm. Standby current typ. is measured with VCC = 3.3 V. Timing specifications

are tested at logic levels of VIL = 0.8 V for a falling edge and VIH = 2.1 V for a rising edge.

2. Operation at 5.5 V is guaranteed by design, not production tested.

3. Recommend use of 100 kW pullup resistors for all open−drain outputs from the ADM1034.

4. Guaranteed by design, not production tested.

5. SMBus timeout disabled by default. See the SMBus section for more information.

SCL

tLOW tR

tHD:STA

tHD:DAT

SDA

tBUF

P

S

tF

tHIGH

tSU:DAT

tHD:STA

tSU:STA

S

Figure 2. Serial Bus Timing Diagram

tSU:STO

P

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