MAX188BEWP+

ADCs/DACs - Special Purpose Overview

The MAX188BEWP+ is a low-power, 8-channel serial 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated. It integrates an 8-channel multiplexer, high-bandwidth track/hold circuit, and successive-approximation conversion logic. The device operates on a single +5V or dual ±5V supply with a sampling rate of 133ksps. Key electrical parameters include a resolution of 12 bits, differential nonlinearity (DNL) of ±1 LSB, integral nonlinearity (INL) of ±0.5 LSB, and a signal-to-noise ratio of 70 dB. It features a 4-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols.

ADCs/DACs - Special Purpose Feature Summary

• 8-channel input multiplexer supporting single-ended or differential configurations
• Serial interface compatible with SPI, QSPI, MICROWIRE, and TMS320 DSPs
• Ultra-low power consumption: 1.5mA operating current, down to 2µA in full power-down mode
• Software-selectable unipolar/bipolar input ranges and internal clock operation

ADCs/DACs - Special Purpose Applications

• Portable data logging systems
• High-accuracy process control instrumentation
• Automatic testing equipment
• Battery-powered instruments
• Medical instruments

ADCs/DACs - Special Purpose Procurement Notes

Verify the component grade 'B' and package type 'WP+' (SOIC-20) against the specific datasheet revision. Confirm that the external reference voltage requirement is met, as the MAX188 lacks an internal reference unlike the MAX186. Ensure the ordering suffix matches the required temperature range of -40°C to +85°C.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX188BEWP+ when an external precision reference is preferred over the internal one found in the MAX186 variant. The 'B' grade offers tighter accuracy specifications compared to C or D grades. Ensure the application supports the 20-pin SO package dimensions and requires the specified -40°C to +85°C industrial temperature range.

ADCs/DACs - Special Purpose Part Context

This part belongs to the MAX186/MAX188 family of low-power serial ADCs. The MAX188 differs from the MAX186 primarily by requiring an external reference voltage at the VREF pin, whereas the MAX186 includes an internal 4.096V reference. Both share identical architecture, pinouts, and performance characteristics regarding speed and channel count.

ADCs/DACs - Special Purpose Replacement Considerations

The MAX186BEWP+ is a functional substitute if an internal reference is acceptable. Other MAX188 variants like MAX188CEWP+ offer different accuracy grades (C grade) but maintain the same interface and pinout compatibility.