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Maxim > Products > [Analog-to-Digital Converters] 
MAX1108, MAX1109
Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs

Lowest-Power 8-Bit Serial 2-Channel ADCs Have Internal Reference


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 336kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX1108/MAX1109 low-power, 8-bit, dual-channel, analog-to-digital converters (ADCs) feature an internal track/hold (T/H) voltage reference, clock, and serial interface. The MAX1108 is specified from +2.7V to +3.6V and consumes only 105µA. The MAX1109 is specified from +4.5V to +5.5V and consumes only 130µA. The analog inputs are software configurable, allowing unipolar/bipolar and single-ended/differential operation; battery monitoring capability is also included.

The full-scale analog input range is determined by the internal reference of +2.048V (MAX1108) or +4.096V (MAX1109), or by an externally applied reference ranging from 1V to VDD. The MAX1108/MAX1109 also feature a software power-down mode that reduces power consumption to 0.5µA when the device is not in use. The 4-wire serial interface directly connects to SPI™, QSPI™, and MICROWIRE™ devices without external logic. Conversions up to 50ksps are performed using either the internal clock or an external serial-interface clock.

The MAX1108 and MAX1109 are available in a 10-pin µMAX package with a footprint that is just 20% of an 8-pin plastic DIP.

Key Features   Applications/Uses
  • Single Supply:
    • +2.7V to +3.6V (MAX1108)
    • +4.5V to +5.5V (MAX1109)
  • Low Power:
    • 105µA at +3V and 50ksps
    • 0.5µA in Power-Down Mode
  • Software-Configurable Unipolar or Bipolar Inputs
  • Input Voltage Range: 0 to VDD
  • Internal Track/Hold
  • Internal Reference:
    • +2.048V (MAX1108)
    • +4.096V (MAX1109)
  • Reference Input Range: 1V to VDD
  • SPI/QSPI/MICROWIRE-Compatible Serial Interface
  • VDD Monitoring Mode
  • Small 10-Pin µMAX Package

 
  		• 4mA- to 20mA-Powered Remote Systems
  		• Handheld Measurement Devices
  		• Medical Instruments
  		• Portable Data Logging
  		• Receive Signal Strength Indicators
  		• Solar-Powered Remote Systems
  		• System Diagnostics

Key Specifications:  Precision ADCs (< 5Msps)
Part Number Resolution
(bits)		 Input Chan. Conv. Rate
(ksps)		 Conv. Time
(µs)		 Data Bus
(bits)		 Ref.
(V)		 Diff. Inputs VSUPPLY
(V)		 ICC
(mA)		 Power
(mW)		 Standby Mode Package/Pins Price
ADC max typ typ See Notes
MAX1108  8 2 50 20 Serial
Ext.
Int.+2.048
 No
3
3.3
 0.07 0.21 Yes
µMAX/10
 $1.55 @1k
MAX1109 
Ext.
Int.+4.096
 5 0.095 0.475
µMAX/10
 $1.55 @1k
See All Precision ADCs (< 5Msps) (377)

Diagram
MAX1108, MAX1109: Typical Operating Circuit
Typical Operating Circuit

Reliability Reports
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    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: 1-16 of 16

    MAX1108 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1108CUB    
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1108CUB-T    
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1108CUB+  
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1108CUB+T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX1108EUB    
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1108EUB-T    
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1108EUB+  
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1108EUB+T    
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1109 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1109CUB    
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1109CUB-T    
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1109CUB+  
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1109CUB+T    
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1109EUB    
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1109EUB-T    
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1109EUB+  
    		Active µMAX;10 pin;15.4 mm²
    Outline Drawing: 21-0061 (PDF)
    Land Pattern: 90-0330 (PDF)
    Use pkgcode/variation: U10+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1109EUB+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet

    Related Products
    MAX1110, MAX1111 +2.7V, Low-Power, Multichannel, Serial, 8-Bit ADCs
    MAX1112, MAX1113 +5V, Low-Power, Multichannel, Serial 8-Bit ADCs
    MAX1106, MAX1107 Single-Supply, Low-Power, Serial 8-Bit ADCs

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    Document Ref.: 19-1399; Rev 1; 2003-06-12
    This page last modified: 2009-11-05


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