DS1780 Просмотр технического описания (PDF) - Maxim Integrated

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Компоненты Описание

производитель

DS1780

CPU Peripheral Monitor

Maxim Integrated 

DC ELECTRICAL CHARACTERISTICS:

Fan RPM-to-Digital Converter

PARAMETER SYMBOL CONDITION

0°C£TA

Accuracy

£100°C

-40°C£TA

£+125°C

Full scale count

Divisor=1; Fan

Count=153

Divisor=2; Fan

FAN1 & FAN2

Count=153

Normal Input RPM

Divisor=4; Fan

Count=153

Divisor=8; Fan

Count=153

Internal Oscillator

+25°C£TA

Frequency

£+75°C

DS1780

(-40°C to +125°C, 2.8V £ VDD £ 5.75V)

MIN TYP MAX UNITS NOTES

±6

%

±12

255 decimal

8800

4400

2200

RPM

8

1100

21.15 22.5 23.85

kHz

DC ELECTRICAL CHARACTERISTICS:

Analog Output VOUT

PARAMETER SYMBOL CONDITION

DAC Resolution

Voltage Range

Error

DACERR

Output Current

Load Capacitance

IOUT

CLOAD

(-40°C to +125°C, 2.8V £ VDD £ 5.75V)

MIN TYP MAX UNITS NOTES

8

bits

0

1.25

V

±5

% of

FSR

2.0

mA

100

pF

DC ELECTRICAL CHARACTERISTICS:

Digital Outputs: A0NTOUT

PARAMETER SYMBOL CONDITION

Logical “1”

Output Voltage

Logical “0”

Output Voltage

VOUT(1)

VOUT(0)

IOUT=±5 mA at

VDD=4.25V

IOUT=±3 mA at

VDD=2.85V

IOUT=±5 mA at

VDD=5.75V

IOUT=±3 mA at

VDD=3.45V

(-40°C to +125°C, 2.8V £ VDD £ 5.75V)

MIN TYP MAX UNITS NOTES

2.4

V

0.4

V

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