MAX1257BETM+T

更新时间： 2024-11-27 13:10:19

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MAX1257BETM+T 数据手册

19-3295; Rev 7; 2/12

12-Bit, Multichannel ADCs/DACs with FIFO,

Temperature Sensing, and GPIO Ports

07/MAX1258

General Description

Features

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

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)

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

Eight Single-Ended Channels or Four Differential

Channels (Unipolar or Bipolar) (MAX1220)

Excellent Accuracy: 0ꢀ5 ꢁSB ꢂIꢁ, 0ꢀ5 ꢁSB DIꢁ

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.

o 12-Bit, Octal, 2µs Settling DAC

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.

Ultra-ꢁow Glitch Energy (4nV•s)

Power-Up Options from Zero Scale or Full Scale

Excellent Accuracy: 0ꢀ5 ꢁSB ꢂIꢁ

o ꢂnternal Reference or External Single-Ended/

Differential Reference

ꢂnternal Reference Voltage 2ꢀ5V or 4ꢀ096V

o ꢂnternal 1ꢃC Accurate Temperature Sensor

o On-Chip FꢂFO Capable of Storing 16 ADC

Conversion Results and One Temperature Result

o On-Chip Channel-Scan Mode and ꢂnternal

Data-Averaging Features

o Analog Single-Supply Operation

+2ꢀ7V to +3ꢀ6V or +4ꢀ75V to +5ꢀ25V

o Digital Supply: +2ꢀ7V to AVDD

o 25MHz, SPꢂ/QSPꢂ/MꢂCROWꢂRE Serial ꢂnterface

o AutoShutdown Between Conversions

o ꢁow-Power ADC

2ꢀ5mA at 225ksps

22µA at 1ksps

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.

0ꢀ2µA at Shutdown

o ꢁow-Power DAC: 1ꢀ5mA

o Evaluation Kit Available (Order MAX1258EVKꢂT)

Applications

Controls for Optical Components

Base-Station Control Loops

QSPI is a trademark of Motorola, Inc.

MICROWIRE is a registered trademark of National

Semiconductor Corp.

System Supervision and Control

Data-Acquisition Systems

AutoShutdown is a trademark of Maxim Integrated Products, Inc.

Pin Configurations appear at end of data sheetꢀ

Ordering Information/Selector Guide

REF

VOLTAGE

(V)

ANALOG

SUPPLY

VOLTAGE (V)

RESOLUTION

BITS**

ADC

CHANNELS

DAC

CHANNELS

PART

PIN-PACKAGE

GPIOs

MAX1220BETX+

MAX1257BETM+

MAX1258BETM+

36 Thin QFN-EP*

48 Thin QFN-EP*

4.096

2.5

4.75 to 5.25

2.7 to 3.6

4.096

4.75 to 5.25

Iote: 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.

________________________________________________________________ Maxim ꢂntegrated Products

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

or visit Maxim’s website at wwwꢀmaxim-icꢀcomꢀ

12 3 4 5 6 7...43

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MAX1257BETM+T 替代型号

型号	品牌	替代类型	描述	数据表
MAX1257BETM+	MAXIM	类似代替	12-Bit, Multichannel ADCs/DACs with FIFO,Temperature Sensing, and GPIO Ports
MAX1257BETM	MAXIM	类似代替	12-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

与MAX1257BETM+T相关器件

型号	品牌	获取价格	描述	数据表
MAX1258	MAXIM	获取价格	12-Bit, Multichannel ADCs/DACs with FIFO,Temperature Sensing, and GPIO Ports
MAX1258	ADI	获取价格	12位、多通道ADC/DAC，带有FIFO、温度传感器和GPIO端口
MAX1258BETM	MAXIM	获取价格	12-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports
MAX1258BETM+	MAXIM	获取价格	12-Bit, Multichannel ADCs/DACs with FIFO,Temperature Sensing, and GPIO Ports
MAX1258BETM-T	MAXIM	获取价格	Analog Circuit, 1 Func, BICMOS, 7X 7 MM, 0.80 MM HEIGHT, MO-220, TQFN-48
MAX1259	MAXIM	获取价格	MAX1259 Battery Manager
MAX1259	ADI	获取价格	电池管理器
MAX1259C/D	MAXIM	获取价格	MAX1259 Battery Manager
MAX1259C/W	MAXIM	获取价格	Battery Management
MAX1259CPE	MAXIM	获取价格	MAX1259 Battery Manager

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