18-Bit, 500ksps, ±5V SAR ADC with Internal Reference in TDFN

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 internal reference and buffer, saving additional cost and space.

This ADC achieves 94.6dB SNR and -101.4dB THD (typ). The MAX11156 guarantees 18-bit no-missing codes and ±2.8 LSB INL (typ).

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.

Applications

* Automatic Test Equipment * Data Acquisition Systems * Industrial Control Systems/Process Control * Medical Instrumentation

* High DC/AC Accuracy Improves Measurement Quality

* 18-Bit Resolution with No Missing Codes

* 500ksps Throughput Rates without Pipeline Delay/Latency

* 94.6dB SNR and -101.4dB THD at 10kHz

* 1.6 LSBRMS Transition Noise

* ±0.5 LSB DNL (typ) and ±2.8 LSB INL (typ)

* Highly Integrated ADC Saves Cost and Space

* 6ppm/°C Internal Reference

* Internal Reference Buffer

* ±5V Bipolar Analog Input Range

* Wide Supply Range and Low Power Simplify Power-Supply Design

* 5V Analog Supply

* 2.3V to 5V Digital Supply

* 25.8mW Power Consumption at 500ksps

* 10µA in Shutdown Mode

* Multi-Industry Standard Serial Interface and Small Package Reduce Size

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

* 3mm x 3mm Tiny 12-Pin TDFN Package