MAX1258 datasheet(1/43 Pages) MAXIM

Part #	MAX1258

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

PDF	43 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 MAX1220/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 sensor and

configurable general-purpose I/O ports (GPIOs) with a

25MHz SPI-/QSPI™-/MICROWIRE®-compatible serial

interface. The ADC is available in 8 and 16 input-channel

versions. The octal DAC outputs settle within 2.0µs and

the ADC has a 225ksps 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•s) and low

digital feedthrough (0.5nV•s) of the integrated octal

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 (MAX1257) and from +4.75V to

+5.25V (MAX1220/MAX1258). These devices consume

2.5mA at 225ksps throughput, only 22µA at 1ksps

throughput, and under 0.2µA in the shutdown mode. The

MAX1257/MAX1258 feature 12 GPIOs, while the

MAX1220 offers four GPIOs that can be configured as

inputs or outputs.

The MAX1220 is available in a 36-pin TQFN package.

The MAX1257/MAX1258 are available in 48-pin TQFN

package. All devices are specified over the

-40°C to +85°C temperature range.

Applications

Controls for Optical Components

Base-Station Control Loops

System Supervision and Control

Data-Acquisition Systems

Features

o 12-Bit, 225ksps ADC

Analog Multiplexer with True-Differential

Track/Hold (T/H)

16 Single-Ended Channels or 8 Differential

Channels (Unipolar or Bipolar)

(MAX1257/MAX1258)

Eight Single-Ended Channels or Four Differential

Channels (Unipolar or Bipolar) (MAX1220)

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

o 12-Bit, Octal, 2µs Settling DAC

Ultra-Low Glitch Energy (4nV•s)

Power-Up Options from Zero Scale or Full Scale

Excellent Accuracy: ±0.5 LSB INL

o Internal Reference or External Single-Ended/

Differential Reference

Internal Reference Voltage 2.5V or 4.096V

o Internal ±1°C Accurate Temperature Sensor

o On-Chip FIFO Capable of Storing 16 ADC

Conversion Results and One Temperature Result

o On-Chip Channel-Scan Mode and Internal

Data-Averaging Features

o Analog Single-Supply Operation

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

o Digital Supply: +2.7V to AVDD

o 25MHz, SPI/QSPI/MICROWIRE Serial Interface

o AutoShutdown Between Conversions

o Low-Power ADC

2.5mA at 225ksps

22µA at 1ksps

0.2µA at Shutdown

o Low-Power DAC: 1.5mA

o Evaluation Kit Available (Order MAX1258EVKIT)

12-Bit, Multichannel ADCs/DACs with FIFO,

Temperature Sensing, and GPIO Ports

________________________________________________________________

Maxim Integrated Products

1

19-3295; Rev 7; 2/12

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.

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

+

Denotes a lead(Pb)-free/RoHS-compliant package.

*

EP = Exposed pad.

**

Number of resolution bits refers to both DAC and ADC.

EVALUATION

KIT

AVAILABLE

Pin Configurations appear at end of data sheet.

QSPI is a trademark of Motorola, Inc.

MICROWIRE is a registered trademark of National

Semiconductor Corp.

AutoShutdown is a trademark of Maxim Integrated Products, Inc.

Ordering Information/Selector Guide

PART

PIN-PACKAGE

REF

VOLTAGE

(V)

ANALOG

SUPPLY

VOLTAGE (V)

RESOLUTION

BITS**

ADC

CHANNELS

DAC

CHANNELS

GPIOs

MAX1220BETX+

36 Thin QFN-EP*

4.096

4.75 to 5.25

12

8

4

MAX1257BETM+

48 Thin QFN-EP*

2.5

2.7 to 3.6

12

16

8

12

MAX1258BETM+

48 Thin QFN-EP*

4.096

4.75 to 5.25

12

16

8

12

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