MAX192ACAP 데이터 시트보기 (PDF) - Maxim Integrated

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MAX192ACAP

Low-Power, 8-Channel,Serial 10-Bit ADC

Maxim Integrated 

Low-Power, 8-Channel,

Serial 10-Bit ADC

Table 2. Channel Selection in Differential Mode (SGL/DIF = 0)

SEL2 SEL1

SEL0

CH0

CH1

CH2

CH3

CH4

CH5

0

0

0

+

–

0

0

1

+

–

0

1

0

+

–

0

1

1

1

0

0

–

+

1

0

1

–

+

1

1

0

–

+

1

1

1

CH6

CH7

+

–

–

+

Table 3. Control-Byte Format

Bit 7

(MSB)

START

Bit 6

SEL2

Bit 5

SEL1

Bit 4

SEL0

Bit 3

UNI/BIP

Bit 2

SGL/DIF

Bit 1

PD1

Bit

7(MSB)

6

5

4

3

2

1

0(LSB)

Name

START

SEL2

SEL1

SEL0

UNI/BIP

SGL/DIF

PD1

PD0

Description

The first logic “1” bit after CS goes low defines the beginning of the control byte.

These three bits select which of the eight channels are used for the conversion.

See Tables 1 and 2.

1 = unipolar, 0 = bipolar. Selects unipolar or bipolar conversion mode. In unipolar

mode, an analog input signal from 0V to VREF can be converted; in differential bipolar

mode, the differential signal can range from -VREF / 2 to +VREF / 2. Select differential

operation if bipolar mode is used.

1 = single ended, 0 = differential. Selects single-ended or differential conversions. In

single-ended mode, input signal voltages are referred to AGND. In differential mode,

the voltage difference between two channels is measured. Select unipolar operation

if single-ended mode is used. See Tables 1 and 2.

Selects clock and power-down modes.

PD1

PD0

Mode

0

0

Full power-down (IQ = 2µA)

0

1

Fast power-down (IQ = 30µA)

1

0

Internal clock mode

1

1

External clock mode

Bit 0

(LSB)

PD0

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