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Save up to 91% Power and up to 50% Space with Industry's Fastest 20-Bit SAR ADC

Published: Apr 24,2014

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Engineers can achieve the industry's highest resolution and fastest sampling rate at the lowest power with the MAX11905, a 20-bit, 1.6Msps successive approximation register (SAR) analog-to-digital converter (ADC) from Maxim Integrated Products, Inc.

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Typically, when engineers require high-precision data conversion, they turn to a delta-sigma ADC. However, to produce high precision and wide dynamic range, those ADCs must consume at least 100mW of power. In contrast, the MAX11905 SAR ADC consumes only 9mW—a 91% power savings.

With this power savings comes very high (20-bit) precision and the fastest sampling (1.6Msps) rate available. The MAX11905 also integrates internal reference buffers, which reduces cost and time to market, and saves up to 50% space compared to competitive discrete solutions. With this versatility, the MAX11905 is ideal for a wide range of applications, including process control, automatic test equipment, medical instrumentation, and battery-powered devices.

Features:

- 20-Bit Resolution with No Missing Codes

- 1.6Msps Throughput with No Pipeline Delay

- 9mW at 1.6Msps, Ultra-Low Power Consumption

- ±6 LSB INL, ~5ppm Over Temperature

- ±1 LSB DNL Maximum at 20 Bit

- 98.3dB SNR at fIN = 10kHz

- 98.1dB SINAD at fIN = 10kHz

- -123dB THD at fIN = 10kHz

- ±VREF Unipolar Differential Analog Input Range

- VREF = 2.5V to 3.6V

- Integrated Reference Buffers

- 1.8V Analog and Digital Core Supply

- 3.3V REFVDD Reference Buffer Supply

- 1.5V to 3.6V Digital Interface Supply

- Serial Interface SPI-/QSPI™-/MICROWIRE®-/DSP-Compatible

- -40°C to +85°C Operation

- 20-Pin, 4mm × 4mm, TQFN Package

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