电压检测MAX110ACPE[1](14)

时间：2026-01-22

Low-Cost, 2-Channel, ±14-Bit Serial ADCsMAX110/MAX111

Table 2. Allowable Input Multiplexer Configurations

CALNULCHS00001

00111

0101X

NO-OP11111

ADC IN+ADC IN-IN1+IN2+IN1-IN2-REF-IN1-IN2-IN1-IN2-REF-DESCRIPTION

Channel 1 connected to ADC inputs. Conversion begins when CSreturns high.Channel 2 connected to ADC inputs. Conversion begins when CSreturns high.IN1- connected to the ADC inputs; offset-null mode selected. Autonull conversionbegins when CSreturns high, and the results are stored in the null register.IN2- connected to the ADC inputs; offset-null mode selected. Autonull conversionbegins when CSreturns high, and the results are stored in the null register.REF- connected to the ADC inputs; offset-null mode selected. Autonull conversionbegins when CSreturns high, and the results are stored in the null register.REF+ and REF- connected to the ADC inputs; gain-calibration mode

selected. Autocal conversion begins when CSreturns high, and the results arestored in the 16-bit I/O register.

Input control word is not transferred to the control register. ADC

configuration remains unchanged and no new conversion starts when CSreturns high.

10X1REF+REF-

XXX0

NoChangeNoChange

X = Don't Care

Table 3. Procedure to Calibrate the ADC

CONTROL WORD

STEP

DESCRIPTION

Sets the new conversion speed (if required)and performs an offset correction conversionwith the internal ADC inputs shorted to REF-.The result is stored in the null register.

(This step also selects the speed/resolution for the ADC.)

Performs a gain-calibration conversion withthe null register contents as the starting value.The result is stored in the calibration register.Performs an offset-null conversion with theinternal ADC inputs shorted to the selectedinput channel's negative input (IN1- or IN2-).The next operation performs the first signalconversion with the new setup.

NO-OP

NotCONV1-DV2 &Not

CHS

UsedCONV4DV4Used

CAL

NUL

PDX

1100

NewData

XX00X1100

2100

NoChange