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Maxim > Products > [Analog-to-Digital Converters] 
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


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 824kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

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; ±VREF, ±VREF/2, 0 to VREF, 0 to VREF/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.

An evaluation kit is available:  MAX1270EVC16, MAX1270EVKIT, MAX1270EVSYS  

Key Features   Applications/Uses
  • 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 VREF, 0 to VREF/2, ±VREF, ±VREF/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

 
  		• 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)    		 Conv. Time
    (µs)    		 Data Bus
    (bits)    		 Ref.
    (V)    		 VIN
    (V)    		 Diff. Inputs VSUPPLY
    (V)    		 ICC
    (mA)    		 Power
    (mW)    		 Standby Mode Package/Pins Price
    ADC max typ typ See Notes
    MAX1270  12 8 110 3 Serial
    Ext.
    Int.+4.096
    ±5
    ±10
    5
    10
    		 No 5 6 30 Yes
    PDIP(N)/24
    SSOP/28
    		 $8.95 @1k
    MAX1271  -
    PDIP(N)/24
    SSOP/28
    		 $8.95 @1k
    See All Precision ADCs (< 5Msps) (377)

    Diagram
    MAX1270, MAX1270A, MAX1270B, MAX1271, MAX1271A, MAX1271B: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 270: Analog-Signal Data Acquisition in Industrial Automation Systems - MAX1270, MAX1271
  		• Application Note 1159: Level Translators For SPI™ and I²C Bus Signals - MAX1270

    Evaluation Kits
  		• MAX1270EVC16, MAX1270EVKIT, MAX1270EVSYS

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * 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.


    Devices: 1-48 of 48

    MAX1270A Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1270ACNG    
    		Active PDIP(N);24 pin;265 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24-8*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1270ACNG+  
    		Active PDIP(N);24 pin;265 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24+8*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1270AENG    
    		Active PDIP(N);24 pin;265 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
    MAX1270AENG+  
    		Active PDIP(N);24 pin;265 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
    MAX1270ACAI    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1270ACAI-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX1270ACAI+  
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1270ACAI+T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX1270AEAI    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1270AEAI-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX1270AEAI+  
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1270AEAI+T    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1270B Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1270BCNG    
    		Active PDIP(N);24 pin;265 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24-8*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1270BCNG+  
    		Active PDIP(N);24 pin;265 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24+8*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1270BENG    
    		Active PDIP(N);24 pin;265 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
    MAX1270BENG+  
    		Active PDIP(N);24 pin;265 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
    MAX1270BCAI    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1270BCAI-T    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1270BCAI+  
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1270BCAI+T    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1270BEAI    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1270BEAI-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX1270BEAI+  
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1270BEAI+T    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1271A Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1271ACNG    
    		Active PDIP(N);24 pin;265 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24-8*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1271ACNG+  
    		Active PDIP(N);24 pin;265 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24+8*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1271AENG    
    		Active PDIP(N);24 pin;265 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
    MAX1271AENG+  
    		Active PDIP(N);24 pin;265 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
    MAX1271ACAI    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1271ACAI-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX1271ACAI+  
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1271ACAI+T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX1271AEAI    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1271AEAI-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX1271AEAI+  
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1271AEAI+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX1271B Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1271BCNG    
    		Active PDIP(N);24 pin;265 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24-8*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1271BCNG+  
    		Active PDIP(N);24 pin;265 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: N24+8*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1271BENG    
    		Active PDIP(N);24 pin;265 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 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
    MAX1271BCAI    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1271BCAI-T    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1271BCAI+  
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1271BCAI+T    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1271BEAI    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1271BEAI-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX1271BEAI+  
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1271BEAI+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet

    Related Products
    MAX199 8-Channel, Multi-Range, 5V, 12-Bit DAS with 8+4 Bus Interface and Fault Protection
    MAX197 Multi-Range (±10V, ±5V, +10V, +5V), Single +5V, 12-Bit DAS with 8+4 Bus Interface
    MAX196, MAX198 6-Channel, Multirange, 5V, 12-Bit DAS with 12-Bit Bus Interface and Fault Protection
    MAX127, MAX127A, MAX127B, MAX128, MAX128A, MAX128B Multirange, +5V, 12-Bit DAS with 2-Wire Serial Interface

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    Document Ref.: 19-4782; Rev 2; 2005-03-02
    This page last modified: 2007-07-20


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