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Maxim > Products > [Analog-to-Digital Converters] 
MAX125, MAX126
2x4-Channel, Simultaneous-Sampling, 14-Bit DAS

First 14-Bit, 8-Channel, Simultaneous-Sampling ADC for Industrial Applications


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Data Sheet
FULL DATA SHEET (PDF, 380kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX125/MAX126 are high-speed, multichannel, 14-bit data-acquisition systems (DAS) with simultaneous track/holds (T/Hs). These devices contain a 14-bit, 3µs, successive-approximation analog-to-digital converter (ADC), a +2.5V reference, a buffered reference input, and a bank of four simultaneous-sampling T/H amplifiers that preserve the relative phase information of the sampled inputs. The MAX125/MAX126 have two multiplexed inputs for each T/H, allowing a total of eight inputs. In addition, the converter is overvoltage tolerant to ±17V; a fault condition on any channel will not harm the IC. Available input ranges are ±5V (MAX125) and ±2.5V (MAX126).

An on-board sequencer converts one to four channels per active-low CONVST pulse. In the default mode, one T/H output (CH1A) is converted. An interrupt signal (active-low INT) is provided after the last conversion is complete. Convert two, three, or four channels by reprogramming the MAX125/MAX126 through the bidirectional parallel interface. Once programmed, the MAX125/MAX126 continue to convert the specified number of channels per active-low CONVST pulse until they are reprogrammed. The channels are converted sequentially, beginning with CH1. The INT signal always follows the end of the last conversion in a conversion sequence. The ADC converts each assigned channel in 3µs and stores the result in an internal 14x4 RAM. Upon completion of the conversions, data can be accessed by applying successive pulses to the active-low RD pin. Four successive reads access four data words sequentially.

The parallel interface's data-access and bus-release timing specifications are compatible with most popular digital signal processors and 16-bit/32-bit microprocessors, so the MAX125/MAX126 conversion results can be accessed without resorting to wait states.

Key Features   Applications/Uses
  • Four Simultaneous-Sampling T/H Amplifiers with Two Multiplexed Inputs (eight single-ended inputs total)
  • 3µs Conversion Time per Channel
  • Throughput:
    • 250ksps (1 channel)
    • 142ksps (2 channels)
    • 100ksps (3 channels)
    • 76ksps (4 channels)
  • Input Range:
    • ±5V (MAX125)
    • ±2.5V (MAX126)
  • Fault-Protected Input Multiplexer (±17V)
  • ±5V Supplies
  • Internal +2.5V or External Reference Operation
  • Programmable On-Board Sequencer
  • High-Speed Parallel DSP Interface

 
  		• Digital Signal Processing (DSP)
  		• Multiphase Motor Control
  		• Power-Factor Monitoring
  		• Power-Grid Synchronization
  		• Vibration and Waveform Analysis

    Key Specifications:   Precision ADCs (< 5Msps)
    Part Number ADC Resolution (Bits) Input Channels Conv. Rate (ksps) Max. Conv. Time (µs) Data Bus (Bits) Ref. (V) Input Range (V) Diff. In Supply Voltage (V) Typ. Supply Current (mA) Typ. Power (mW) Standby Mode Package Price**
    MAX125  14 8 250 3 µP/14 Ext.
    Int.+2.5     		±5 No ±5 17 165 Yes SSOP/36 $13.42 @ 1k
    MAX126  ±2.5 $13.42 @ 1k
    See All Precision ADCs (< 5Msps) (375)
    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
    MAX125, MAX126: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 290: ADCs for Simultaneous Sampling - MAX125, MAX126
  		• Application Note 1138: Practical Data Acquisition using a Windows¹-based Power Meter - MAX125

    Evaluation Kits
  		• MAX125EVKIT, MAX126EVKIT

    Design Guides
  		• A/D Converters (PDF)

    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: 1-40 of 40

    MAX125 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX125CC/D+    


    Land Pattern: Not Available

    		See data sheet
    MAX125EVB16    


    Land Pattern: Not Available

    		See data sheet
    MAX125CC/D    


    Land Pattern: Not Available

    		See data sheet
    MAX125CCAX+D  
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX125CCAX+TD    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX125CEAX+D  
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX125CEAX+TD    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX125CCAX-T    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX125CCAX    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX125CEAX-T    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX125CEAX    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX126 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX126CC/D+    


    Land Pattern: Not Available

    		See data sheet
    MAX126BC/D+    


    Land Pattern: Not Available

    		See data sheet
    MAX126EVB16    


    Land Pattern: Not Available

    		See data sheet
    MAX126CC/D    


    Land Pattern: Not Available

    		See data sheet
    MAX126BC/D    


    Land Pattern: Not Available

    		See data sheet
    MAX126CCAX+TD    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX126CCAX+D  
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX126CEAX+TD    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX126CEAX+D  
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX126BCAX+    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX126BCAX+T    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX126ACAX-T    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX126ACAX    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX126BCAX    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX126CCAX    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX126ACAX+T    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX126ACAX+    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX126CCAX-T    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX126BCAX-T    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX126AEAX+T    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX126CEAX    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX126CEAX-T    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX126BEAX    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX126AEAX    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX126AEAX-T    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX126BEAX+T    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX126BEAX+    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX126AEAX+    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX126BEAX-T    
    		SSOP;36 pin;163 mm²
    Outline Drawing: 21-0040 (PDF)
    Land Pattern: 90-0098 (PDF)
    Use pkgcode/variation: A36-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

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    Document Ref.: 19-1319; Rev 3; 2008-08-01
    This page last modified: 2008-08-01


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