Low-Power, 8-Channel, Serial 10-Bit ADC

See MAX1248 and MAX148 for 3V Applications

Please check latest availability status for a specific part variant.


The MAX192 is a low-cost, 10-bit data-acquisition system that combines an 8-channel multiplexer, high-bandwidth track/hold, and serial interface with high conversion speed and ultra-low power consumption. The device operates with a single +5V supply. The analog inputs are software configurable for single-ended and differential (unipolar/bipolar) operation.

The 4-wire serial interface connects directly to SPI™, QSPI™, and MICROWIRE™ devices, without using external logic. A serial strobe output allows direct connection to TMS320 family digital signal processors. The MAX192 uses either the internal clock or an external serial-interface clock to perform successive approximation A/D conversions. The serial interface can operate beyond 4MHz when the internal clock is used. The MAX192 has an internal 4.096V reference with a drift of ±30ppm typical. A reference-buffer amplifier simplifies gain trim and two sub-LSBs reduce quantization errors.

The MAX192 provides a hardwired active-low SHDN pin and two software-selectable power-down modes. Accessing the serial interface automatically powers up the device, and the quick turn-on time allows the MAX192 to be shut down between conversions. By powering down between conversions, supply current can be cut to under 10µA at reduced sampling rates.

The MAX192 is available in 20-pin DIP and SO packages, and in a shrink-small-outline package (SSOP) that occupies 30% less area than an 8-pin DIP. The data format provides hardware and software compatibility with the MAX186/MAX188. For anti-aliasing filters, consult the data sheets for the MAX291-MAX297.
MAX192: Typical Operating Circuit MAX192: Typical Operating Circuit Enlarge+

Key Features

  • 8-Channel Single-Ended or 4-Channel Differential Inputs
  • Single +5V Operation
  • Low Power:
    • 1.5mA (operating)
    • 2µA (power-down)
  • Internal Track/Hold, 133kHz Sampling Rate
  • Internal 4.096V Reference
  • 4-Wire Serial Interface is Compatible with SPI, QSPI, MICROWIRE, and TMS320
  • 20-Pin DIP, SO, SSOP Packages
  • Pin-Compatible 12-Bit Upgrade (MAX186/MAX188)


  • Automotive Electronics
  • Battery Management
  • Battery-Powered Applications
  • Consumer Electronics
  • Medical Instruments
  • Pen-Entry Systems
  • Portable Data Logging
  • Robotics

See parametric specs for Precision ADCs (< 5Msps) (434)

Part NumberResolution
Input ChannelsConv. Rate
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
External VREF
External VREF
Unipolar VIN
Bipolar VIN
ADCmaxnominalminmaxmaxmaxSee Notes
MAX192 108133SARSPIBoth4.0962.554.0962.048-700.5
SOIC (W)/20
$4.54 @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.
Product Reliability Reports: MAX192.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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