MAX1221 datasheet(1/44 Pages) MAXIM

Part #	MAX1221

Description	12-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

PDF	44 Pages

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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General Description

The MAX1221/MAX1223/MAX1343 integrate a multichan-

nel, 12-bit, analog-to-digital converter (ADC) and a 12-bit,

digital-to-analog converter (DAC) in a single IC. The

devices also include a temperature sensor and config-

urable general-purpose I/O ports (GPIOs) with a 25MHz

SPI™-/QSPI™-/MICROWIRE™-compatible serial inter-

face. The ADC is available in a 12 or an eight input-chan-

nel version. The DAC outputs settle within 2.0µs, and the

ADC has a 225ksps conversion rate.

All devices include an internal reference (2.5V) providing

a well-regulated, low-noise reference for both the ADC

and DAC. Programmable reference modes for the ADC

and DAC allow the use of an internal reference, an exter-

nal reference, or a combination of both. Features such as

an internal ±1°C accurate temperature sensor, FIFO,

scan modes, programmable internal or external clock

modes, data averaging, and AutoShutdown™ allow users

to minimize both power consumption and processor

requirements. The low glitch energy (4nV•s) and low digi-

tal feedthrough (0.5nV•s) of the integrated DACs make

these devices ideal for digital control of fast-response

closed-loop systems.

The devices are guaranteed to operate with a supply volt-

age from +2.7V to +5.25V. The devices consume 2.5mA

at 225ksps throughput, only 22µA at 1ksps throughput,

and under 0.2µA in the shutdown mode. The MAX1221/

MAX1343 offer four GPIOs that can be configured as

inputs or outputs.

The MAX1221/MAX1223/MAX1343 are available in 36-pin

thin QFN packages. All devices are specified over the

-40°C to +85°C temperature range.

Applications

Closed-Loop Controls for Optical Components

and Base Stations

System Supervision and Control

Data-Acquisition Systems

Features

♦ 12-Bit, 225ksps ADC

Analog Multiplexer with True-Differential

Track/Hold (T/H)

12 Single-Ended Channels or Six Differential

Channels (Unipolar or Bipolar) (MAX1223)

Eight Single-Ended Channels or Four Differential

Channels (Unipolar or Bipolar)

(MAX1221/MAX1343)

Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL

♦ 12-Bit, Octal, 2µs Settling DAC

(MAX1221/MAX1223)

Ultra-Low Glitch Energy (4nV•s)

Power-Up Options from Zero Scale or Full Scale

Excellent Accuracy: ±0.5 LSB INL

♦ Internal Reference or External Single-Ended/

Differential Reference

Internal Reference Voltage 2.5V

♦ Internal ±1°C Accurate Temperature Sensor

♦ On-Chip FIFO Capable of Storing 16 ADC

Conversion Results and One Temperature Result

♦ On-Chip Channel-Scan Mode and Internal

Data-Averaging Features

♦ Analog Single-Supply Operation

+2.7V to +5.25V

♦ 2.7V to AVDD Digital Supply

♦ 25MHz, SPI/QSPI/MICROWIRE Serial Interface

♦ AutoShutdown Between Conversions

♦ Low-Power ADC

2.5mA at 225ksps

22µA at 1ksps

0.2µA at Shutdown

♦ Low-Power DAC: 1.5mA

♦ Evaluation Kit Available (Order MAX1258EVKIT)

12-Bit, Multichannel ADCs/DACs with FIFO,

Temperature Sensing, and GPIO Ports

________________________________________________________________

Maxim Integrated Products

1

Ordering Information/Selector Guide

19-4010; Rev 1; 12/07

For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

EVALUATION

KIT

AVAILABLE

Pin Configurations appear at end of data sheet.

PART

PIN-PACKAGE

REF

VOLTAGE

(V)

ANALOG

SUPPLY

VOLTAGE (V)

RESOLUTION

BITS**

ADC

CHANNELS

DAC

CHANNELS

GPIOs

PKG

CODE

MAX1221BETX

36 Thin QFN-EP*

2.5

2.7 to 5.25

12

8

4

T3666-3

MAX1223BETX

36 Thin QFN-EP*

2.5

2.7 to 5.25

12

8

0

T3666-3

MAX1343BETX

36 Thin QFN-EP*

2.5

2.7 to 5.25

12

8

4

T3666-3

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

AutoShutdown is a trademark of Maxim Integrated Products, Inc.

Note: All devices are specified over the -40°C to +85°C operating temperature range.

*

EP = Exposed pad.

**

Number of resolution bits refers to both DAC and ADC.

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