MAX1258 Maxim Integrated Products, MAX1258 Datasheet

MAX1258

Manufacturer Part Number

MAX1258

Description

Multichannel ADCs/DACs

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX1258.pdf (47 pages)

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The MAX1220–MAX1223/MAX1257/MAX1258 integrate a

12-bit, multichannel, analog-to-digital converter (ADC),

and a 12-bit, octal, digital-to-analog converter (DAC) in a

single IC. These devices also include a temperature sen-

sor and configurable general-purpose I/O ports (GPIOs)

with a 25MHz SPI™-/QSPI™-/MICROWIRE™-compatible

serial interface. The ADC is available in 8/12/16 input-

channel versions. The octal DAC outputs settle within

2.0µs and the ADC has a 300ksps conversion rate.

All devices include an internal reference (2.5V or

4.096V) for both the ADC and DAC. Programmable ref-

erence modes allow the use of an internal reference, an

external 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 power consumption and proces-

sor requirements. The low glitch energy (4nV

digital feedthrough (0.5nV

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 +3.6V (MAX1221/MAX1223/MAX1257)

and from +4.75V to +5.25V (MAX1220/MAX1222/

MAX1258). These devices consume 2.5mA at 300ksps

throughput, only 22µA at 1ksp throughput, and under

0.2µA in the shutdown mode. The MAX1257/MAX1258

feature 12 GPIOs, while the MAX1220/MAX1221 offer 4

GPIOs that can be configured as inputs or outputs.

The MAX1220–MAX1223 are available in 36-pin thin

QFN packages. The MAX1257/MAX1258 are available

in 48-pin thin QFN packages. All devices are specified

over the -40°C to +85°C temperature range.

19-3295; Rev 2; 8/04

*Future product—contact factory for availability.

**EP = Exposed pad.

***Number of resolution bits refers to both DAC and ADC.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX1220BETX

MAX1221BETX* -40°C to +85°C 36 Thin QFN-EP**

MAX1222BETX* -40°C to +85°C 36 Thin QFN-EP**

MAX1223BETX* -40°C to +85°C 36 Thin QFN-EP**

MAX1257BETM -40°C to +85°C 48 Thin QFN-EP**

MAX1258BETM -40°C to +85°C 48 Thin QFN-EP**

PART

Controls for Optical Components

Base-Station Control Loops

System Supervision and Control

Data-Acquisition Systems

12-Bit, Multichannel ADCs/DACs with FIFO,

-40°C to +85°C 36 Thin QFN-EP**

TEMP RANGE

________________________________________________________________ Maxim Integrated Products

General Description

Temperature Sensing, and GPIO Ports

•

s) of the integrated octal

PIN-PACKAGE

Applications

•

s) and low

VOLTAGE

4.096

REF

(V)

2.5

Ordering Information/Selector Guide

VOLTAGE (V)

4.75 to 5.25

♦ 12-Bit, 300ksps ADC

♦ 12-Bit, Octal, 2µs Settling DAC

♦ Internal Reference or External Single-Ended/

♦ Internal ±1°C Accurate Temperature Sensor

♦ On-Chip FIFO Capable of Storing 16 ADC

♦ On-Chip Channel-Scan Mode and Internal

♦ Analog Single-Supply Operation

♦ 25MHz, SPI/QSPI/MICROWIRE Serial Interface

♦ AutoShutdown Between Conversions

♦ Low-Power ADC

♦ Low-Power DAC: 1.5µA

♦ Evaluation Kit Available (Order MAX1258EVKIT)

ANALOG

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.

2.7 to 3.6

Pin Configurations appear at end of data sheet.

SUPPLY

Differential Reference

Conversion Results and One Temperature Result

Data-Averaging Features

Analog Multiplexer with True-Differential

16 Single-Ended Channels or 8 Differential

12 Single-Ended Channels or 6 Differential

8 Single-Ended Channels or 4 Differential

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

Ultra-Low Glitch Energy (4nV•s)

Power-Up Options from Zero Scale or Full Scale

Excellent Accuracy: ±0.5 LSB INL

Internal Reference Voltage 2.5V or 4.096V

+2.7V to +3.6V or +4.75V to +5.25V

2.5mA at 300ksps

22µA at 1ksps

0.2µA at Shutdown

Track/Hold (T/H)

Channels (Unipolar or Bipolar)

RESOLUTION

BITS***

CHANNELS

ADC

CHANNELS

DAC

Features

GPIOs

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