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

The MAX11158 is an 18-bit, 500ksps, SAR ADC offering excellent AC and DC performance with true bipolar input range, internal reference, and small size. The MAX11158 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 MAX11158 integrates a low drift reference with internal buffer, saving the cost and space of an external reference.

This ADC achieves 93.7dB SNR and -100.0dB THD. The MAX11158 guarantees 18-bit no-missing codes and ±2.7 LSB INL (typ).

The MAX11158 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 for multichannel applications and provides a busy indicator option for simplified system synchronization and timing.

The MAX11158 is offered in a 10-pin, 3mm x 5mm, μMAX® package and is specified over the -40°C to +85°C temperature range.

Applications

* Automatic Test Equipment * Data Acquisition Systems * Industrial 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

* 93.7dB SNR and -100.0dB THD at 10kHz

* 2.0 LSBRMS Transition Noise

* ±0.5 LSB DNL (typ) and ±2.7 LSB INL (typ)

* Highly Integrated ADC Saves Cost and Space

* ±7ppm/°C Internal Reference

* Internal Reference Buffer

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

* 5V Analog Supply

* 2.3V to 5V Digital Supply

* 38mW Power Consumption at 500ksps

* 10µA in Shutdown Mode

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

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

* 3mm x 5mm Tiny 10-Pin µMAX Package