MAX1243BCPA

Analog To Digital Converters (ADC) Overview

The MAX1243BCPA+ is a low-power, 10-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +2.7V to +5.25V supply and features a successive-approximation architecture with an internal track/hold circuit. The device utilizes a high-speed, 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE standards. It requires an external reference voltage at the REF pin, accepting inputs from 0V to VREF. Key electrical parameters include a maximum throughput rate of 73ksps, a conversion time of 7.5µs, and a shutdown mode current below 10µA. The component is housed in an 8-pin PDIP package and supports an operating temperature range of 0°C to +70°C.

Analog To Digital Converters (ADC) Feature Summary

• Low-power operation with a dedicated shutdown mode for extended battery life
• Integrated track/hold circuitry for accurate signal sampling
• Flexible serial interface compatible with standard microcontroller protocols
• External reference input capability for customized full-scale ranges

Analog To Digital Converters (ADC) Applications

• Portable data logging systems
• Process control monitoring
• Temperature measurement circuits
• Isolated data acquisition modules

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'BCPA+' corresponds to the required lead-free/RoHS-compliant packaging and the commercial temperature grade (0°C to +70°C). Confirm that the design accommodates the requirement for an external voltage reference, as this variant lacks the internal reference found in the MAX1242 series. Ensure the PCB layout separates analog and digital grounds to maintain specified accuracy levels.

Analog To Digital Converters (ADC) Selection Notes

Select the MAX1243BCPA+ when an external reference voltage is preferred or already available in the system, offering flexibility in setting the full-scale input range up to the positive supply rail. Choose this part over the MAX1242 if the application does not require the integrated 2.5V reference or needs to utilize a different reference precision. Consider the 10-bit resolution and 73ksps speed for general-purpose data acquisition tasks where power consumption is a constraint.

Analog To Digital Converters (ADC) Part Context

This component belongs to the MAX1242/MAX1243 family of low-power serial ADCs. It shares the same physical footprint and pinout as the MAX1242 but differs in its reference configuration. The 'B' designation indicates a ±1 LSB integral nonlinearity specification, while 'C' denotes the commercial temperature range. It serves as a cost-effective solution for space-constrained embedded applications requiring moderate resolution and low energy usage.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1242BCPA+ is a pin-compatible alternative within the same family, differing only by the inclusion of an internal 2.5V reference. For higher resolution requirements, the MAX1240AEPA+ and MAX1241AEPA+ are 12-bit upgrades that maintain pin compatibility. Verify that any substitute maintains the required serial interface timing and voltage levels.