MAX188CEPP+

ADCs/DACs - Special Purpose Overview

The MAX188CEPP+ 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 circuitry, and a successive-approximation register (SAR) architecture. The device operates on a single +5V supply or dual ±5V supplies, requiring an external reference voltage of 4.096V applied to the VREF pin. It features a 4-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols. Key electrical specifications include a sampling rate of 133 kS/s, a differential nonlinearity (DNL) of ±1 LSB, and an integral nonlinearity (INL) of ±0.75 LSB for the C-grade device.

ADCs/DACs - Special Purpose Feature Summary

• 8-Channel Multiplexer: Supports 8 single-ended or 4 differential inputs with software-configurable unipolar/bipolar operation.
• High-Speed Conversion: Achieves 133 kS/s sampling rate using internal clock or external serial clock up to 2 MHz.
• Low Power Consumption: Draws 1.5 mA in operating mode; reduces to under 10 µA in power-down modes between conversions.
• Serial Interface: Directly connects to SPI, QSPI, and MICROWIRE devices without external logic; includes SSTRB output for DSP synchronization.

ADCs/DACs - Special Purpose Applications

• Portable Data Logging Systems
• Data-Acquisition Systems
• High-Accuracy Process Control
• Automatic Testing Equipment
• Battery-Powered Instruments

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific grade suffix 'C' corresponds to the required linearity specifications (±1 LSB DNL, ±0.75 LSB INL). Confirm the package type 'PP' indicates a 20-pin PDIP housing. Ensure the external reference voltage is set to 4.096V at the VREF pin, as the MAX188 lacks an internal reference unlike the MAX186. Check availability status as older Maxim products may have limited stock or obsolescence risks.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX188CEPP+ when an external precision reference is preferred over the internal one found in the MAX186 variant. The 'E' temperature range (-40°C to +85°C) ensures operation in industrial environments. Choose this part if the application requires a parallel-free serial interface and can accommodate the 20-pin PDIP footprint. Verify that the source impedance of analog inputs remains below 5kΩ to maintain acquisition time requirements without additional buffering.

ADCs/DACs - Special Purpose Part Context

The MAX188CEPP+ belongs to the MAX186/MAX188 family of low-power, 8-channel, serial 12-bit ADCs. It shares the same core architecture and pinout as the MAX186 but differs in reference configuration; the MAX188 requires an external reference while the MAX186 includes an internal 4.096V reference. The 'CEPP+' designation specifies the C-grade accuracy, -40°C to +85°C operating temperature, 20-pin PDIP package, and lead-free/RoHS compliance.

ADCs/DACs - Special Purpose Replacement Considerations

The MAX186CEPP+ is a functional substitute if an internal reference is acceptable, though it contains an integrated 4.096V reference. Other MAX188 variants with different grades (A, B, D) offer varying linearity specifications. For higher performance or newer technology, consult the MAX128/MAX129 series or similar SAR ADCs from Analog Devices, noting potential pinout or software interface differences.