MAX17823BGCV datasheet(20/121 Pages) MAXIM

tên linh kiện	MAX17823BGCV

Giải thích chi tiết về linh kiện	12-Channel High-Voltage Data Acquisition System

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MAX17823B

12-Channel High-Voltage Data Acquisition System

www.maximintegrated.com

Maxim Integrated | 20

Auxiliary Inputs

The AUXIN1 and AUXIN2 inputs can be used to measure external temperatures by enabling MEASUREEN[13:12].

These inputs have a common-mode input range of 0V to VAA. For these measurements, the ADC reference voltage

is VTHRM which is switched from VAA as shown in Figure 5. The auxiliary inputs are not oversampled even if

oversampling is enabled; they are measured only once and stored as 12-bit values in the AIN1 and AIN2 registers.

Figure 5. Auxiliary Measurement

To measure external temperature the auxiliary input is connected to a voltage divider consisting of a 10KΩ pull-up

to THRM and a 10KΩ NTC thermistor to ground as shown in Figure 6.

AUXIN2

AUXIN1

AGND

THRM

R61

10kΩ

R60

10kΩ

RTH1

10kΩ

RTH2

10kΩ

C61

100pF

C60

100pF

C62

100pF

Thermistor

wire harness

Figure 6. Auxiliary Application Circuit

MUX

ADC

VREF

THRM

Conversions

in Progress

VAA

AUXIN1

AUXIN2

AGND

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