MAX1243BESA+

Analog To Digital Converters (ADC) Overview

The MAX1243BESA+ is a low-power, 10-bit successive-approximation 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 fast track/hold circuit with an acquisition time of 1.5µs. The device utilizes a high-speed, 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE standards. Power consumption is specified at 3mW at the maximum sampling speed of 73ksps when VDD is 3V. A shutdown mode reduces current to 5µW. The component requires an external reference voltage applied to the REF pin.

Analog To Digital Converters (ADC) Feature Summary

• Requires external reference voltage input for analog-to-digital conversion
• Features a 3-wire serial interface compatible with standard microcontroller ports
• Includes internal track/hold circuitry for signal acquisition

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature range of -40°C to +85°C. Confirm the 'S' package code corresponds to the SO-8 footprint. Ensure the '+' suffix denotes lead-free/RoHS compliance status as per manufacturer specifications. Cross-reference the ordering information table to validate the exact part number against the required accuracy class.

Analog To Digital Converters (ADC) Selection Notes

Select this model over the MAX1242 variant when an external reference voltage source is available or preferred for system design flexibility. The MAX1243 lacks the internal 2.5V reference found in the MAX1242, requiring an external bypass capacitor of at least 0.1µF at the REF pin. Consider the 10-bit resolution and 73ksps throughput rate against application bandwidth requirements.

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 package, pinout, and core SAR architecture as the MAX1242. The primary distinction lies in the reference configuration; the MAX1243 mandates an external reference while the MAX1242 includes an internal one. Both devices offer pin-compatible upgrades to 12-bit resolutions within the broader product line.

Analog To Digital Converters (ADC) Replacement Considerations

MAX1242BESA+ is a pin-compatible alternative that includes an internal 2.5V reference instead of requiring an external one.