MAX1243BESA+T

Analog To Digital Converters (ADC) Overview

The MAX1243BESA+T is a low-power, 10-bit successive-approximation analog-to-digital converter (ADC) housed in an 8-pin SO package. It operates on a single +2.7V to +5.25V supply and achieves a maximum throughput rate of 73ksps with a conversion time of 7.5µs. The device requires an external reference voltage applied to the REF pin, accepting inputs from 0V to VREF. Power consumption is 3mW at full speed, reducible to 66µW at 1ksps or 5µW in shutdown mode. It features a 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE standards.

Analog To Digital Converters (ADC) Feature Summary

• Requires external reference voltage for operation
• Features internal track/hold circuitry
• Supports standard microcontroller serial interfaces

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific temperature grade suffix against project requirements. The 'E' suffix indicates extended range (-40°C to +85°C), while 'C' denotes commercial range (0°C to +70°C). Confirm that the external reference circuit meets the minimum impedance and current sourcing specifications required for accurate conversion.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an external reference voltage is preferred over an internal one. Ensure the external reference can source up to 250µA during conversion cycles. Verify that the application allows for the necessary wake-up time if utilizing the shutdown feature, as performance depends on the external reference power-up characteristics.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MAX1242/MAX1243 family of low-power serial ADCs. Unlike the MAX1242, which includes an internal 2.5V reference, the MAX1243 relies entirely on an external reference signal. Both devices share identical pinouts and timing characteristics, allowing for flexible design choices regarding reference voltage sources.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1242BESA+T serves as a pin-compatible alternative featuring an internal 2.5V reference instead of requiring an external one. Designers must account for the different reference configuration when substituting parts.