SAR 18-bit ADC with ref comes in 12-pin package


The MAX11156 18-bit, 500ksps, SAR ADC offers excellent AC and DC performance with true bipolar input range, small size, and internal reference. The MAX11156 measures a ±5V (10VP-P) input range while operating from a single 5V supply. A patented charge-pump architecture allows direct sampling of high-impedance sources. The MAX11156 integrates an optional 6ppm/°C reference with internal buffer, saving the cost and space of an external reference.

The MAX11156 produces 94.6dB SNR and -105dB THD (typ). The MAX11156 guarantees 18-bit no-missing codes.

The MAX11156 communicates using an SPI-compatible serial interface at 2.5V, 3V, 3.3V, or 5V logic. The serial interface can be used to daisy-chain multiple ADCs in parallel for multichannel applications and provides a busy indicator option for simplified system synchronization and timing.

The MAX11156 is offered in a 12-pin, 3mm x 3mm, TDFN package and is specified over the -40°C to +85°C temperature range.

ey Features

  • High DC and AC Accuracy
  • 18-Bit Resolution with No Missing Codes
  • SNR: 94.6dB
  • THD: -105dB at 10kHz
  • ±2.5 LSB INL (typ)
  • ±0.4 LSB DNL (typ)
  • Internal Reference and Reference Buffer Save Cost and Board Space
  • 6ppm/°C (typ)
  • Tiny 12-Pin 3mm x 3mm TDFN Package
  • Bipolar ±5V Analog Input Range Saves External Signal Conditioning
  • Single-Supply ADC with Low Power
  • 5V Analog Supply
  • 2.3V to 5V Digital Supply
  • 26.5mW at 500ksps
  • Shutdown Mode
  • 500ksps Throughput Rate
  • No Pipeline Delay/Latency
  • Flexible Industry-Standard Serial Interface Saves I/O Pins

SAR 18-bit ADC with voltage ref comes in 12-pin package

Maxim Integrated Products has introduced its smallest 12-pin, 18-bit successive approximation register (SAR) analogue-to-digital converter (ADC).

Available in a 3x3mm TDFN package, the MAX11156 has an internal reference and reference buffer.


It supports a ±5V input from a single positive 5V input rail, which can eliminate the need for negative power supplies and simplifies designs.

The device has an 18-bit resolution and a 500ksample/s sampling rate.

DC accuracy is 0.5 LSB DNL and 2.5 LSB INL (typ)). AC performance is 94.6dB SNR and -105dB THD (typ)). The device has an SPI-compatible serial interface, which can be used to daisy-chain multiple ADCs in parallel for multichannel applications.


For more read: SAR 18-bit ADC with ref comes in 12-pin package

Leave a Comment

= 4 + 2

Read previous post:
Basics of the I2C Communication Protocol
Basics of the I2C Communication Protocol

So far, we’ve talked about the basics of SPI communication and UART communication, so now let’s go into the final protocol of this...

Scroll to top