500ksps, Low-Power, Serial 12-/10-/8-Bit ADCs

Small, Low-Power, SPI, 1-/2-Channel, 500ksps ADCs

Please check latest availability status for a specific part variant.


The MAX11661−MAX11666 are 12-/10-/8-bit, compact, low-power, successive approximation analog-to-digital converters (ADCs). These high-performance ADCs include a high-dynamic range sample-and-hold and a high-speed serial interface. These ADCs accept a full-scale input from 0V to the power supply or to the reference voltage.

The MAX11662/MAX11664/MAX11666 feature dual, single-ended analog inputs connected to the ADC core using a 2:1 MUX. The devices also include a separate supply input for data interface and a dedicated input for reference voltage. In contrast, the single-channel devices generate the reference voltage internally from the power supply.

These ADCs operate from a 2.2V to 3.6V supply and consume only 3.3mW. The devices include full powerdown mode and fast wake-up for optimal power management and a high-speed 3-wire serial interface. The 3-wire serial interface directly connects to SPI, QSPI™, and MICROWIRE® devices without external logic.

Excellent dynamic performance, low voltage, low power, ease of use, and small package size make these converters ideal for portable battery-powered data-acquisition applications, and for other applications that demand low-power consumption and minimal space.

These ADCs are available in a 10-pin µMAX® package, and a 6-pin SOT23 package. These devices operate over the -40°C to +125°C temperature range.
MAX11661, MAX11662, MAX11663, MAX11664, MAX11665, MAX11666: Typical Application Circuit MAX11661, MAX11662, MAX11663, MAX11664, MAX11665, MAX11666: Typical Application Circuit Enlarge+

Key Features

  • 500ksps Conversion Rate, No Pipeline Delay
  • 12-/10-/8-Bit Resolution
  • 1-/2-Channel, Single-Ended Analog Inputs
  • Low-Noise 73dB SNR
  • Variable I/O: 1.5V to 3.6V (Dual-Channel Only)
    • Allows the Serial Interface to Connect Directly to 1.5V, 1.8V, 2.5V, or 3V Digital Systems
  • 2.2V to 3.6V Supply Voltage
  • Low Power
    • 3.3mW
    • Very Low Power Consumption at 8µA/ksps
  • External Reference Input (Dual-Channel Devices Only)
  • 1.3µA Power-Down Current
  • SPI-/QSPI-/MICROWIRE-Compatible Serial Interface
  • 10-Pin, 3mm x 5mm µMAX Package
  • 6-Pin, 2.8mm x 2.9mm SOT23 Package
  • Wide -40°C to +125°C Operation


  • Automotive Systems
  • Battery-Operated Systems
  • Communication Systems
  • Data Acquisition
  • Medical Instrumentation
  • Portable Data Logging

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

Part NumberResolution
# Input ChannelsConv. Rate
ADC ArchitectureData BusDiff/S.E. InputExternal VREF
External VREF
Unipolar VIN
(ADC)(max)(min)(max)(max)(See Notes)
MAX11661 81500SARSPIS.E. Only--3.649.5-700.25
$0.73 @1k
MAX11662 8213.6549.5-700.25
$1.03 @1k
MAX11663 101--61.5-850.5
$1.12 @1k
MAX11664 10213.6561.5-850.5
$1.10 @1k
MAX11665 121--73-851
$1.24 @1k
MAX11666 12213.6573-851
$1.46 @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.

MAX11665EVKIT: Evaluation Kit for the MAX11665
MAX11666EVKIT: Evaluation Kit for the MAX11666
Request Reliability Report for: MAX11663 
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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