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Maxim > Products > [Analog-to-Digital Converters] 
MAX1248, MAX1249
+2.7V to +5.25V, Low-Power, 4-Channel, Serial, 10-Bit ADCs in QSOP-16


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Data Sheet
FULL DATA SHEET (PDF, 256kB)
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Description
The MAX1248/MAX1249 10-bit data-acquisition systems combine a 4-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 their 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 MAX1248/MAX1249 use either the internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions.

The MAX1248 has an internal 2.5V reference, while the MAX1249 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 MAX1248/MAX1249, 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 MAX1248/MAX1249 are available in a 16-pin DIP and a very small QSOP that occupies the same board area as an 8-pin SO.

For 8-channel versions of these devices, see the MAX148/MAX149 datasheet.

Key Features   Applications/Uses
  • 4-Channel Single-Ended or 2-Channel Differential Inputs
  • Single +2.7V to +5.25V Operation
  • Internal 2.5V Reference (MAX1248)
  • 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
  • 16-Pin QSOP Package (same area as 8-pin SO)

 
  		• Battery-Powered Applications
  		• Data Acquisition
  		• Medical Instruments
  		• Pen Digitizers
  		• Portable Data Logging
  		• System Supervision

    Key Specifications:   Precision ADCs (< 5Msps)
    Part Number ADC Resolution (Bits) Input Channels Conv. Rate (ksps) Max. Conv. Time (µs) Data Bus (Bits) Ref. (V) Diff. In Supply Voltage (V) Typ. Supply Current (mA) Typ. Power (mW) Standby Mode Package Price**
    MAX1248  10 4 133 6 Serial Ext.
    Int.+2.5     		Yes 3
    3.3     		1.2 3.6 Yes CDIP(N)/16
    PDIP(N)/16
    QSOP/16     		$3.40 @ 1k
    MAX1249  Ext. 3
    3.3
    5     		0.8 $3.95 @ 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
    MAX1248, MAX1249: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 1988: Circuit Enables PC-Based Voltage Measurements - MAX1248

    Evaluation Kits
    none

    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: 1-52 of 52

    MAX1248 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1248AMJE    
    		CDIP(N);16 pin;173 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1248BMJE    
    		CDIP(N);16 pin;173 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1248ACPE    
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1248ACPE+  
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1248BCPE+  
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1248BCPE    
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1248BEPE    
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1248BEPE+    
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1248AEPE    
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1248AEPE+  
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1248BCEE+T    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1248ACEE-T    


    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX1248ACEE    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1248ACEE+T    


    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX1248ACEE+  
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1248BCEE-T    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-5*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1248BCEE    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1248BCEE+  
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1248AEEE+  
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1248AEEE+T    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1248BEEE+  
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1248BEEE+T    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1248AEEE    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1248AEEE-T    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1248BEEE-T    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1248BEEE    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1249BMJE    
    		CDIP(N);16 pin;173 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249AMJE    
    		CDIP(N);16 pin;173 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249ACPE+  
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1249BCPE+  
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1249ACPE    
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249BCPE    
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249BEPE    
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249AEPE    
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249AEPE+  
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1249BEPE+  
    		PDIP(N);16 pin;158 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1249BCEE-T    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-5*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249BCEE+T    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1249BCEE+  
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1249ACEE    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249ACEE+T    


    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX1249ACEE-T    


    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX1249BCEE    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249ACEE+  
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1249BEEE+T    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1249BEEE+  
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1249AEEE+T    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1249AEEE    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249AEEE-T    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249BEEE    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249BEEE-T    
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1249AEEE+  
    		QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Related Products
    MAX148, MAX149 +2.7V to +5.25V Low-Power 8-Channel Serial 10-Bit ADCs
    MAX157, MAX159 +2.7V, Low-Power, 2-Channel, 108ksps, Serial 10-Bit ADCs in 8-Pin µMAX
    MAX1246, MAX1247 +2.7V, Low-Power, 4-Channel, Serial 12-Bit ADCs in QSOP-16

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     Description 
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    Document Ref.: 19-1072; Rev 2; 1998-05-01
    This page last modified: 2007-07-18


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