4-Channel, ±VREF Multirange Inputs, Serial 16-Bit ADC

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The MAX1303 multirange, low-power, 16-bit, successive-approximation, analog-to-digital converter (ADC) operates from a single +5V supply and achieves throughput rates up to 115ksps. A separate digital supply allows digital interfacing with 2.7V to 5.25V systems using the SPI-/QSPI™-/MICROWIRE®-compatible serial interface. Partial power-down mode reduces the supply current to 1.3mA (typ). Full power-down mode reduces the power-supply current to 1µA (typ).

The MAX1303 provides four (single-ended) or two (true differential) analog input channels. Each analog input channel is independently software programmable for seven single-ended input ranges (0V to +VREF/2, -VREF/2 to 0V, 0V to +VREF, -VREF to 0V, ±VREF/4, ±VREF/2, and ±VREF), and three differential input ranges (±VREF/2, ±VREF, ±2 x VREF).

An on-chip +4.096V reference offers a small convenient ADC solution. The MAX1303 also accepts an external reference voltage between 3.800V and 4.136V.

The MAX1303 is available in a 20-pin TSSOP package, and is specified for operation from -40°C to +85°C.

MAX1302, MAX1303: Pin Configuration MAX1302, MAX1303: Pin Configuration Enlarge+

Key Features

  • Software-Programmable Input Range for Each Channel
  • Single-Ended Input Ranges
    • 0V to +VREF/2, -VREF/2 to 0V, 0V to +VREF, -VREF to 0V, ±VREF/4, ±VREF/2, and ±VREF
  • Differential Input Ranges
    • ±VREF/2, ±VREF, and ±2 x VREF
  • Four Single-Ended or Two Differential Analog Inputs
  • ±6V Overvoltage Tolerant Inputs
  • Internal or External Reference
  • 115ksps Maximum Sample Rate
  • Single +5V Power Supply
  • 20-Pin TSSOP Package


  • Avionics
  • Data Acquisition Systems
  • Industrial Control Systems
  • Robotics

See parametric specs for Precision ADCs (< 5Msps) (432)

Part NumberResolution
Input ChannelsConv. Rate
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
External VREF
External VREF
Unipolar VIN
Bipolar VIN
ADCmaxnominalminmaxmaxmaxSee Notes
MAX1303 164115SARSPIBoth4.0963.84.1368.1928.19290-981
$10.10 @1k

Pricing 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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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