Rainbow-electronics MAX6696 Uživatelský manuál stáhnout pdf (Strana 7)

and 100µA, the change in the measured voltage due to

series resistance is:

Since 1°C corresponds to 198.6µV, series resistance

contributes a temperature offset of:

Assume that the sensing diode being measured has a

series resistance of 3Ω. The series resistance con-

tributes a temperature offset of:

The effects of the ideality factor and series resistance

are additive. If the diode has an ideality factor of 1.002

and series resistance of 3Ω, the total offset can be cal-

culated by adding error due to series resistance with

error due to ideality factor:

1.36°C - 2.13°C = -0.77°C

for a diode temperature of +85°C.

3 0 453 1 36Ω

Ω

=+ °. .

198 6

0 453

Ω

∆VAARAR

MSS

=−×=×()100 10 90µµ µ

MAX6695/MAX6696

Dual Remote/Local Temperature Sensors with

SMBus Serial Interface

_______________________________________________________________________________________ 7

OT2

OT1

ALERT

DXP2

DXN

DXP1

RESET/

UVLO

CIRCUITRY

(RESET)

MUX

REMOTE1

REMOTE2

LOCAL

OT2 THRESHOLDS

ALERT RESPONSE ADDRESS

ALERT THRESHOLD

LOCAL TEMPERATURES

REMOTE TEMPERATURES

COMMAND BYTE

ADC

CONTROL

LOGIC

SMBus

READ

WRITE

(STBY)

SMBDATA

SMBCLK

(ADD0)

(ADD1)

ADDRESS

DECODER

DIODE FAULT

() ARE FOR MAX6696 ONLY.

OT1 THRESHOLDS

Figure 1. MAX6695/MAX6696 Functional Diagram

1 2 3 4 5 6 7 8 9 10 11 12 ... 19 20

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