MAX1302AEUG+

Analog To Digital Converters (ADC) Overview

The MAX1302AEUG+ is a multirange, low-power, 16-bit successive-approximation analog-to-digital converter (ADC) operating from a single +5V supply with throughput rates up to 115ksps. It features eight single-ended or four true differential analog input channels, each independently software-programmable for seven single-ended ranges and three differential ranges. The device includes an on-chip +4.096V reference or accepts external references between 3.800V and 4.136V. Digital interfacing utilizes an SPI-/QSPI™-/MICROWIRE®-compatible serial interface with a separate digital supply supporting 2.7V to 5.25V systems. Partial power-down mode reduces current to 1.3mA (typ), while full power-down reduces it to 1µA (typ).

Analog To Digital Converters (ADC) Feature Summary

• Software-programmable input range selection for each channel supports various unipolar and bipolar configurations.
• Eight single-ended or four differential analog inputs provide flexible signal acquisition capabilities.
• Inputs are fault tolerant to ±6V overvoltage conditions without affecting other channel conversions.
• Integrated internal reference or provision for external reference voltage simplifies system design.

Analog To Digital Converters (ADC) Applications

• Industrial Control Systems
• Data-Acquisition Systems
• Avionics
• Robotics

Analog To Digital Converters (ADC) Procurement Notes

Verify the component authenticity by checking the marking on the package against official datasheet specifications. Confirm the ordering suffix matches the required lead-free/RoHS-compliant status. Ensure the specific grade (MAX1302A vs MAX1302B) aligns with integral nonlinearity requirements. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm availability and origin.

Analog To Digital Converters (ADC) Selection Notes

Select this ADC when high resolution and multirange input flexibility are required for single-supply applications. Consider the MAX1302BEUG+ if tighter integral nonlinearity specifications are necessary compared to the MAX1302AEUG+. Evaluate the need for separate digital and analog supplies to minimize noise coupling in sensitive environments. Verify that the serial interface compatibility matches the host microcontroller's communication protocols.

Analog To Digital Converters (ADC) Part Context

The MAX1302 belongs to a family of multirange, low-power, 16-bit SAR ADCs designed for precision data acquisition. Variants such as the MAX1300 and MAX1301 offer different channel counts and pin configurations. The MAX1302 specifically provides eight single-ended inputs in a 24-pin TSSOP package, distinguishing it from lower-channel counterparts while maintaining similar power management and serial interface features.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers include MAX1302BEUG+.

Analog To Digital Converters (ADC) FAQ

How does the MAX1302 handle overvoltage conditions on its analog inputs?

All analog input channels are fault tolerant to ±6V. A fault condition on an idle channel does not affect the conversion result of other channels.

What are the supported input ranges for the MAX1302 channels?

Each channel is programmable for seven single-ended ranges (0V to +VREF/2, -VREF/2 to 0V, 0V to +VREF, -VREF to 0V, ±VREF/4, ±VREF/2, and ±VREF) and three differential ranges (±VREF/2, ±VREF, and ±2 x VREF).

Can the MAX1302 operate with a digital supply voltage different from its analog supply?

Yes, the device has a separate digital supply (DVDDO) that allows interfacing with 2.7V to 5.25V systems, while the analog supplies (AVDD1, AVDD2, DVDD) operate at +5V nominal.