1. Products
  2. A/D Converters (ADC)
  3. Precision A/D Converters
  4. Single Channel A/D Converters
  5. MAX1243


Features and Benefits

  • +2.7V to +5.25V Single-Supply Operation
  • 10-Bit Resolution
  • Internal 2.5V Reference (MAX1242)
  • Small Footprint: 8-Pin PDIP and SO Packages
  • Low Power:
    • 3.7mW (73ksps, MAX1242)
    • 3mW (73ksps, MAX1243)
    • 66µW (1ksps, MAX1243)
    • 5µW (Power-Down Mode)
  • Internal Track/Hold
  • SPI/QSPI/MICROWIRE 3-Wire Serial Interface
  • Pin-Compatible 12-Bit Upgrades: MAX1240/MAX1241

Product Details

The MAX1242/MAX1243 are low-power, 10-bit analog-to-digital converters (ADCs) available in 8-pin packages. They operate with a single +2.7V to +5.25V supply and feature a 7.5µs successive-approximation ADC, a fast track/hold (1.5µs), an on-chip clock, and a high-speed, 3-wire serial interface.
Power consumption is only 3mW (VDD = 3V) at the 73ksps maximum sampling speed. A 2µA shutdown mode reduces power at slower throughput rates.
The MAX1242 has an internal 2.5V reference, while the MAX1243 requires an external reference. The MAX1243 accepts signals from 0V to VREF, and the reference input range includes the positive supply rail. An external clock accesses data from the 3-wire interface, which connects directly to standard microcontroller I/O ports. The interface is compatible with SPI, QSPI, and MICROWIRE®.
Excellent AC characteristics and very low power combined with ease of use and small package size make these converters ideal for remote-sensor and data-acquisition applications, or for other circuits with demanding power consumption and space requirements. The MAX1242/MAX1243 are available in 8-pin PDIP and SO packages.


  • Isolated Data Acquisition
  • Portable Data Logging
  • Process Control Monitoring
  • Temperature Measurement
  • Test Equipment

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Product Recommendations

MAX1243 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX1243ACPA+ Material Declaration Reliability Data Plastic Dual-In-Line, Narrow (0.3in)
MAX1243ACSA+ Material Declaration Reliability Data Small-Outline IC, Narrow (0.15in)
MAX1243ACSA+T Material Declaration Reliability Data Small-Outline IC, Narrow (0.15in)
MAX1243BCPA+ Material Declaration Reliability Data Plastic Dual-In-Line, Narrow (0.3in)
MAX1243BCSA+ Material Declaration Reliability Data Small-Outline IC, Narrow (0.15in)
MAX1243BCSA+T Material Declaration Reliability Data Small-Outline IC, Narrow (0.15in)
MAX1243BESA+ Material Declaration Reliability Data Small-Outline IC, Narrow (0.15in)
MAX1243BESA+T Material Declaration Reliability Data Small-Outline IC, Narrow (0.15in)
Wafer Fabrication Data

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