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MAX148, MAX149
+2.7V to +5.25V Low-Power 8-Channel Serial 10-Bit ADCs


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 1.9MB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail


Description
The MAX148/MAX149 10-bit data-acquisition systems combine an 8-channel multiplexer, high-bandwidth track/hold, and serial interface with high conversion speed and low power consumption. They operate from a single +2.7V to +5.25V supply, and sample to 133ksps. Both devices' analog inputs are software configurable for unipolar/bipolar and single-ended/differential operation.

The 4-wire serial interface connects directly to SPI™/QSPI™ and MICROWIRE™ devices without external logic. A serial-strobe output allows direct connection to TMS320-family digital signal processors. The MAX148/MAX149 use either the internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions.

The MAX149 has an internal 2.5V reference, while the MAX148 requires an external reference. Both parts have a reference-buffer amplifier with a ±1.5% voltage-adjustment range.

These devices provide a hard-wired active-low SHDN pin and a software-selectable power-down, and can be programmed to automatically shut down at the end of a conversion. Accessing the serial interface automatically powers up the MAX148/MAX149, and the quick turn-on time allows them to be shut down between all conversions. This technique can cut supply current to under 60µA at reduced sampling rates.

The MAX148/MAX149 are available in a 20-pin DIP and a 20-pin SSOP.

For 4-channel versions of these devices, see the MAX1248/MAX1249 data sheet.

Key Features   Applications/Uses
  • 8-Channel Single-Ended or 4-Channel Differential Inputs
  • Single-Supply Operation: +2.7V to +5.25V
  • Internal 2.5V Reference (MAX149)
  • Low Power:
    • 1.2mA (133ksps, 3V Supply)
    • 54µA (1ksps, 3V Supply)
    • 1µA (Power-Down Mode)
  • SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire Serial Interface
  • Software-Configurable Unipolar or Bipolar Inputs
  • 20-Pin DIP/SSOP Packages

 
  • Battery-Powered Instruments
  • Data Acquisition
  • Medical Instruments
  • Pen Digitizers
  • 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
    MAX148  10 8 133 7.5 Serial Ext. - Yes
    3
    3.3
    5
    0.8 2.4 Yes
    CDIP(N)/20
    PDIP(N)/20
    SSOP/20
    $3.10 @1k
    MAX149  Int.+2.5
    ±5
    2.5
    3
    3.3
    1.2 3.6
    CDIP(N)/20
    PDIP(N)/20
    SSOP/20
    $3.20 @1k
    See All Precision ADCs (< 5Msps) (377)

    Diagram
    MAX148, MAX149: Typical Operating Circuit
    Typical Operating Circuit

    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: 1-54 of 54

    MAX148 Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX148AMJP    
    Active CDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J20-2*
    -55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX148BMJP    
    Active CDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J20-2*
    -55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX148BC/D    
    Active

    Land Pattern: Not Available

    See data sheet
    MAX148ACPP    
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20-4*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX148BCPP    
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20-4*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX148ACPP+  
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20+4*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX148BCPP+  
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20+4*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX148AEPP    
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX148BEPP    
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX148AEPP+  
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX148BEPP+  
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX148ACAP    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX148ACAP-T    
    Active

    Land Pattern: Not Available

    0°C to +70°C See data sheet
    MAX148BCAP    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX148BCAP-T    
    Active

    Land Pattern: Not Available

    0°C to +70°C See data sheet
    MAX148ACAP+  
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX148ACAP+T    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX148BCAP+  
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX148BCAP+T    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX148AEAP    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX148AEAP-T    
    Active

    Land Pattern: Not Available

    -40°C to +85°C See data sheet
    MAX148BEAP    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX148BEAP-T    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX148AEAP+  
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX148AEAP+T    
    Active

    Land Pattern: Not Available

    -40°C to +85°C See data sheet
    MAX148BEAP+  
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX148BEAP+T    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX149 Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX149AMJP    
    Active CDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J20-2*
    -55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX149BMJP    
    Active CDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J20-2*
    -55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX149ACPP    
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20-4*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX149BCPP    
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20-4*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX149ACPP+  
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20+4*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX149BCPP+  
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20+4*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX149AEPP    
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX149BEPP    
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX149AEPP+  
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX149BEPP+    
    Active PDIP(N);20 pin;219 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P20+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX149BEAP-G071    
    Active

    Land Pattern: Not Available

    -40°C to +85°C See data sheet
    MAX149ACAP    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX149ACAP-T    
    Active

    Land Pattern: Not Available

    0°C to +70°C See data sheet
    MAX149BCAP    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX149BCAP-T    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX149ACAP+T    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX149ACAP+  
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX149BCAP+T    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX149BCAP+  
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX149AEAP    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX149AEAP-T    
    Active

    Land Pattern: Not Available

    -40°C to +85°C See data sheet
    MAX149BEAP    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX149BEAP-T    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX149AEAP+  
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX149BEAP+  
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX149BEAP+T    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX149AEAP+T    
    Active SSOP;20 pin;58 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0094 (PDF)
    Use pkgcode/variation: A20+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Related Products
    MAX146, MAX147 +2.7V, Low-Power, 8-Channel, Serial 12-Bit ADCs
    MAX1248, MAX1249 +2.7V to +5.25V, Low-Power, 4-Channel, Serial, 10-Bit ADCs in QSOP-16

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    Document Ref.: 19-0464; Rev 3; 2009-06-08
    This page last modified: 2009-06-08


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