MAX1227_12 Datasheet, PDF(9/22 Page) Maxim Integrated Products – 12-Bit 300ksps ADCs with FIFO,Temp Sensor, Internal Reference

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MAX1227_12 Datasheet, PDF (9/22 Pages) Maxim Integrated Products – 12-Bit 300ksps ADCs with FIFO,Temp Sensor, Internal Reference

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12-Bit 300ksps ADCs with FIFO,

Temp Sensor, Internal Reference

SCLK

DIN

DOUT

tCSS0

tCH

tDH

tDS

tDOE

tCP

tDOT

tCSH1

tCSH0

tCSS1

tDOD

Figure 1. Detailed Serial-Interface Timing Diagram

DIN

SCLK

SERIAL

INTERFACE

DOUT

OSCILLATOR

CONTROL

EOC

CNVST

AIN1

AIN2

AIN15

REF-

REF+

T/H

TEMP

SENSE

MAX1227

MAX1229

MAX1231

12-BIT

SAR

ADC

FIFO AND

ACCUMULATOR

INTERNAL

REFERENCE

Figure 2. Functional Diagram

Detailed Description

The MAX1227/MAX1229/MAX1231 are low-power, seri-

al-output, multichannel ADCs with temperature-sensing

capability for temperature-control, process-control, and

monitoring applications. These 12-bit ADCs have inter-

nal track and hold (T/H) circuitry that supports single-

ended and fully differential inputs. Data is converted

from an internal temperature sensor or analog voltage

sources in a variety of channel and data-acquisition

configurations. Microprocessor (ÂµP) control is made

easy through a 3-wire SPI-/QSPI/ MICROWIRE-compati-

ble serial interface.

Figure 2 shows a simplified functional diagram of the

MAX1227/MAX1229/MAX1231 internal architecture.

The MAX1227 has eight single-ended analog input

channels or four differential channels. The MAX1229

has 12 single-ended analog input channels or six differ-

ential channels. The MAX1231 has 16 single-ended

analog input channels or eight differential channels.

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