MAX1020_12 Datasheet, PDF(25/44 Page) Maxim Integrated Products – 10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

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MAX1020_12 Datasheet, PDF (25/44 Pages) Maxim Integrated Products – 10-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

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10-Bit, Multichannel ADCs/DACs with FIFO,

Temperature Sensing, and GPIO Ports

Table 5. Setup Register*

BIT NAME

CKSEL1

CKSEL0

REFSEL1

REFSEL0

DIFFSEL1

DIFFSEL0

*See below for bit details.

BIT

7 (MSB)

0 (LSB)

FUNCTION

Set to zero to select setup register.

Set to one to select setup register.

Clock mode and CNVST configuration; resets to one at power-up.

Clock mode and CNVST configuration.

Reference-mode configuration.

Unipolar-/bipolar-mode register configuration for differential mode.

Table 5a. Clock Modes (see the Clock Mode section)

CKSEL1

CKSEL0

CONVERSION CLOCK

Internal

External (3.6MHz max)

ACQUISITION/SAMPLING

Internally timed.

Externally timed by CNVST.

Internally timed.

Externally timed by SCLK.

CNVST CONFIGURATION

CNVST

AIN15/AIN11/AIN7

Table 5b. Clock Modes 00, 01, and 10

REFSEL1 REFSEL0

VOLTAGE

REFERENCE

OVERRIDE

CONDITIONS

AUTOSHUTDOWN

REF2

CONFIGURATION

Internal reference turns off after scan is complete. If

AIN

internal reference is turned off, there is a programmed

Internal (DAC

and ADC)

delay of 218 internal-conversion clock cycles.

Internal reference required. There is a programmed

AIN14/AIN10/AIN6

Temperature delay of 244 internal-conversion clock cycles for the

internal reference to settle after wake-up.

External single-

AIN

Internal reference not used.

ended (REF1

Internal reference required. There is a programmed

for DAC and Temperature delay of 244 internal-conversion clock cycles for the

REF2

REF2 for ADC)

internal reference to settle after wake-up.

Default reference mode. Internal reference turns off

Internal (ADC)

AIN

after scan is complete. If internal reference is turned

off, there is a programmed delay of 218 internal-

and external

conversion clock cycles.

AIN14/AIN10/AIN6

REF1 (DAC)

Internal reference required. There is a programmed

Temperature delay of 244 internal-conversion clock cycles for the

internal reference to settle after wake-up.

External

AIN

Internal reference not used.

differential

Internal reference required. There is a programmed

REF2

(ADC), external Temperature delay of 244 internal-conversion clock cycles for the

REF1 (DAC)

internal reference to settle after wake-up.

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