MAX1294BCEI

Analog To Digital Converters (ADC) Overview

The MAX1294BCEI is a low-power, 12-bit analog-to-digital converter (ADC) featuring a successive-approximation architecture. It operates from a single +5V supply and includes an on-chip clock, a +2.5V internal reference, and a high-speed 12-bit parallel interface. The device supports a maximum sampling rate of 420ksps with power consumption of 10mW at full speed. It offers software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation, providing six input channels in single-ended mode. The component is housed in a 28-pin QSOP package and functions within a temperature range of 0°C to +70°C.

Analog To Digital Converters (ADC) Feature Summary

• Software-selectable power-down modes enable rapid wake-up and reduced current consumption between conversions.
• Integrated track/hold stage provides excellent dynamic performance with low distortion.
• Flexible analog input multiplexer allows configuration for various signal types and channel counts.

Analog To Digital Converters (ADC) Applications

• Industrial Control Systems
• Data-Acquisition Systems
• Patient Monitoring

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm the exact temperature grade and package variant. Ensure that any additional characters following the base model number correspond precisely to the intended specifications before finalizing procurement orders.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution and up to 420ksps sampling rate are required within a +5V system. Consider the 28-pin QSOP footprint and the availability of an internal reference when designing compact data-acquisition circuits.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MAX1294/MAX1296 family of precision ADCs. It shares architectural similarities with the MAX1291/MAX1293 series but differs in operating voltage (+5V vs +3V) and channel count. The 'B' designation indicates a specific linearity class within the product lineup.

Analog To Digital Converters (ADC) Replacement Considerations

For pin-compatible +3V versions, consult the MAX1295 or MAX1297 datasheets. Verify electrical characteristics and supply voltage requirements before substituting other devices in existing designs.

Analog To Digital Converters (ADC) FAQ

How does the MAX1294 handle analog input overvoltage?

Internal protection diodes clamp the analog inputs to VDD and GND, allowing signals to swing within (GND - 300mV) to (VDD + 300mV) without damage.

What is the function of the INT pin?

The INT pin goes low to indicate that the conversion is complete and output data is ready. It returns high upon the first read cycle or if a new control byte is written.

Can the MAX1294 operate with an external clock?

Yes, the device supports both internal and external clock modes. External clock frequencies between 100kHz and 7.6MHz are recommended for proper operation.