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Maxim > Products > [Analog-to-Digital Converters] 
MAX1391, MAX1394
1.5V to 3.6V, 416ksps, 1-Channel True-Differential/2-Channel Single-Ended, 8-Bit, SAR ADCs

Ultra-Low Power and Supply Voltage Make These ADCs Ideal for Battery-Powered Applications


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 320kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX1391/MAX1394 micropower, serial-output, 8-bit, analog-to-digital converters (ADCs) operate with a single power supply from +1.5V to +3.6V. These ADCs feature automatic shutdown, fast wake-up, and a high-speed 3-wire interface. Power consumption is only 0.743mW (VDD = +1.5V) at the maximum conversion rate of 416ksps. AutoShutdown™ between conversions reduces power consumption at slower throughput rates.

The MAX1391/MAX1394 require an external reference VREF that has a wide range from 0.6V to VDD. The MAX1391 provides one true-differential analog input that accepts signals ranging from 0 to VREF (unipolar mode) or ± VREF/2 (bipolar mode). The MAX1394 provides two single-ended inputs that accept signals ranging from 0 to VREF. Analog conversion results are available through a 5MHz 3-wire SPI™-/QSPI™-/MICROWIRE™-/digital signal processor (DSP)-compatible serial interface. Excellent dynamic performance, low voltage, low power, ease of use, and small package sizes make these converters ideal for portable battery-powered data-acquisition applications, as well as other applications that demand low-power consumption and minimal space.

The MAX1391/MAX1394 are available in a space-saving (3mm x 3mm), 10-pin TDFN package. The parts operate over the extended (-40°C to +85°C) and military (-55°C to +125°C) temperature ranges.

An evaluation kit is available:  MAX1396EVKIT  

Key Features   Applications/Uses
  		• 416ksps, 8-Bit Successive-Approximation Register (SAR) ADCs
  		• Single True-Differential Analog Input Channel with Unipolar-/Bipolar-Selected Input (MAX1391)
  		• Dual Single-Ended Input Channel with Channel-Selected Input (MAX1394)
  		• ±0.2 LSB INL, ±0.2 LSB DNL, No Missing Codes
  		• ±0.25 LSB Total Unadjusted Error (TUE)
  		• 49dB SINAD at 100kHz Input Frequency
  		• Single Supply Voltage (+1.5V to +3.6V)
  		• 0.97mW at 416ksps, 1.8V
  		• 0.230mW at 100ksps, 1.8V
  		• 3.1µW at 1ksps, 1.8V
  		• < 1µA Shutdown Current
  		• External Reference (0.6V to VDD)
  		• AutoShutdown Between Conversions
  		• SPI-/QSPI-/MICROWIRE-/DSP-Compatible, 3- or 4-Wire Serial Interface
  		• Small (3mm x 3mm), 10-Pin TDFN

    		  
  		• Battery-Powered Instruments
  		• Data Acquisition
  		• Medical Instruments
  		• Portable Data Logging
  		• Process Control

    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
    MAX1391  8 1 400 2.5 Serial Ext. 0 to Vref or ±Vref/2 Yes
    1.5
    1.8
    2.5
    3
    3.3
    		 0.576 0.864 Yes
    TDFN-EP/10
    		 $1.15 @1k
    MAX1394  2 0 to Vref
    TDFN-EP/10
    		 $1.15 @1k
    See All Precision ADCs (< 5Msps) (377)

    Diagram
    MAX1391, MAX1394: Typical Operating Circuit
    Typical Operating Circuit

    Evaluation Kits
  		• MAX1396EVKIT

    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: 1-9 of 9

    MAX1391 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1391ETB-T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1391ETB+  
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1391ETB+T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1391MTB-T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033-1*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1394 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1394ETB-T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1394ETB+T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1394ETB+  
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1394MTB-T    
    		Active TDFN-EP;10 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0003 (PDF)
    Use pkgcode/variation: T1033-1*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1394MTB+T    
    		Active

    Land Pattern: Not Available

    		-55°C to +125°C See data sheet

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    Document Ref.: 19-3720; Rev 0; 2006-11-08
    This page last modified: 2006-11-10


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