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MAX1270, MAX1270A, MAX1270B, MAX1271, MAX1271A, MAX1271B

Multirange, +5V, 8-Channel, Serial 12-Bit ADCs

12-Bit, 8-Channel, Serial ADCs Have +/-17V Fault-Protected Inputs

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX1270/MAX1271 are multirange, 12-bit data-acquisition systems (DAS) that require only a single +5V supply for operation, yet accept signals at their analog inputs that may span above the power-supply rail and below ground. These systems provide eight analog input channels that are independently software programmable for a variety of ranges: ±10V, ±5V, 0 to +10V, 0 to +5V for the MAX1270; ±V_REF, ±V_REF/2, 0 to V_REF, 0 to V_REF/2 for the MAX1271. This range switching increases the effective dynamic range to 14 bits and provides the flexibility to interface 4-20mA, ±12V, and ±15V powered sensors directly to a single +5V system. In addition, these converters are fault protected to ±16.5V; a fault condition on any channel will not affect the conversion result of the selected channel. Other features include a 5MHz bandwidth track/hold, software-selectable internal/external clock, 110ksps throughput rate, and internal 4.096V or external reference operation.

The MAX1270/MAX1271 serial interface directly connects to SPI™/QSPI™ and MICROWIRE™ devices without external logic.

A hardware shutdown input (SHDN-bar) and two software-programmable power-down modes, standby (STBYPD) or full power-down (FULLPD), are provided for low-current shutdown between conversions. In standby mode, the reference buffer remains active, eliminating start-up delays.

The MAX1270/MAX1271 are available in 24-pin narrow DIP or space-saving 28-pin SSOP packages.

Data Sheet

Download	Rev 2	(PDF, 824kB)
E-Mail

An evaluation kit is available: MAX1270EVC16, MAX1270EVKIT, MAX1270EVSYS

Key Features

12-Bit Resolution, 1/2LSB Linearity
+5V Single-Supply Operation
SPI/QSPI and MICROWIRE-Compatible 3-Wire Interface
Four Software-Selectable Input Ranges
- MAX1270: 0 to +10V, 0 to +5V, ±10V, ±5V
- MAX1271: 0 to V_REF, 0 to V_REF/2, ±V_REF, ±V_REF/2
Eight Analog Input Channels
110ksps Sampling Rate
±16.5V Overvoltage-Tolerant Input Multiplexer
Internal 4.096V or External Reference
Two Power-Down Modes
Internal or External Clock
24-Pin Narrow DIP or 28-Pin SSOP Packages

Applications/Uses

Automatic Testing
Battery-Powered Instruments
Data Acquisition Systems
Industrial Control Systems
Medical Instruments
Robotics

Key Specifications:

Precision ADCs (< 5Msps)

Part Number

Resolution
(bits)

Input Chan.

Conv. Rate
(ksps)

Data Bus
(bits)

Diff/S.E. Input

Internal V_REF
(V)

External V_REF
(V)

Unipolar V_IN
(V)

Bipolar V_IN
(±V)

SNR
(dB)

SINAD
(dB)

THD
(dB)

SFDR
(dB)

DNL
(±LSB)

INL
(±LSB)

Package/Pins

Budgetary Price

ADC

max

nominal

min

max

See Notes

MAX1270

110

SPI

S.E. Only

4.096

2.4

4.18

-87

PDIP(N)/24

SSOP/28

$12.22 @1k

MAX1271

4.096

2.048

PDIP(N)/24

SSOP/28

$12.22 @1k

See All Precision ADCs (< 5Msps) (423)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

Application Notes

Application Note 270		Analog-Signal Data Acquisition in Industrial Automation Systems
Application Note 1159		Level Translators For SPI™ and I²C Bus Signals

Product Guides

Signal Chain (PDF)

Reliability Reports

Reliability Report:	MAX1270.pdf
Show FIT data for:
Request Reliability Report for:

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Devices: 51-52 / 52

<-- Previous 1 2 Next -->

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1271BENG			Active	PDIP(N);24 pin;265.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: N24-8*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1271BENG+			Active	PDIP(N);24 pin;265.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: N24+8*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Devices: 51-52 / 52

<-- Previous 1 2 Next -->

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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See All Precision ADCs (< 5Msps) (430 Products)

Evaluation Kits

MAX1270EVC16, MAX1270EVKIT, ...

Evaluation Kit/Evaluation System for the MAX1270, MAX1271, MAX127, and MAX128

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