ADM1033ARQZ-REEL datasheet(5/40 Pages) AD

Il numero della parte	ADM1033ARQZ-REEL

Spiegazioni elettronici	Thermal Monitor and Fan Speed (RPM) Controller

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Produttore elettronici	AD [Analog Devices]

Homepage	http://www.analog.com

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5 / 40 page

ADM1033

Rev. 0 | Page 5 of 40

Parameter

Min

Typ

Max

Units

Test Conditions/Comments

TACHOMETER ACCURACY

Fan Speed Measurement Accuracy

±4

%

AGTL + INPUT (THERM)

Input High Level

0.75 × REF

V

Input Low Level

0.4

V

SERIAL BUS TIMING3

See Figure 2

Clock Frequency, fSCLK

400

kHz

Glitch Immunity, tSW

50

ns

Bus Free Time, tBUF

1.3

µs

Start Setup Time, tSU:STA

0.6

µs

Start Hold Time, tHD:STA

0.6

µs

Stop Condition Setup Time, tSU:STO

0.6

µs

SCL Low Time, tLOW

1.3

µs

SCL High Time, tHIGH

0.6

µs

SCL, SDA Rise Time, tr

1000

ns

SCL, SDA Fall Time, tf

300

ns

Data Setup Time, tSU:DAT

100

ns

Detect Clock Low Timeout, tTIMEOUT

25

35

ms

See Note 4

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 Guaranteed by design, not production tested.

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

P

S

tLOW

tR

tF

tHD:STA

tHD:DAT

tSU:DAT

tSU:STA

tHD:STA

tSU:STO

tHIGH

SCL

PS

SDA

tBUF

Figure 2. Serial Bus Timing Diagram

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