MAX122BEWG+

Analog To Digital Converters (ADC) Overview

The MAX122BEWG+ is a BiCMOS, sampling 12-bit analog-to-digital converter (ADC) featuring an on-chip track/hold circuit and a low-drift voltage reference. It operates with a single +5V positive supply and a negative supply ranging from -10.8V to -15.75V. The device accepts bipolar analog input voltages from -5V to +5V, which are overvoltage tolerant to ±15V. It utilizes a standard microprocessor interface with three-state data outputs compatible with TTL/CMOS logic. The MAX122 achieves throughput rates of 333ksps with a conversion time of 2.6µs using clock frequencies between 0.1MHz and 5MHz. Power dissipation is typically 210mW.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a track/hold circuit and a buried-zener voltage reference requiring only decoupling capacitors externally.
• Provides a standard microprocessor interface with three-state outputs that eliminate the need for wait states in most systems.
• Supports five operational modes including full-control, stand-alone, slow-memory, ROM, and continuous-conversion configurations.
• Features a separate track/hold control input and allows direct interfacing with FIFO buffers to reduce processor interrupt overhead.

Analog To Digital Converters (ADC) Applications

• Digital-Signal Processing
• Audio and Telecom Processing
• Speech Recognition and Synthesis
• High-Speed Data Acquisition
• Spectrum Analysis

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix BEWG against official documentation to confirm package type and temperature range. Confirm lead-free status and RoHS compliance through manufacturer certificates. Ensure power supply requirements match system capabilities, specifically the negative rail tolerance. Check for obsolescence notices or discontinuance alerts prior to finalizing procurement plans.

Analog To Digital Converters (ADC) Selection Notes

Select the MAX122BEWG+ when a 333ksps throughput rate is sufficient, as opposed to the faster MAX120 variant. Ensure the design accommodates the required negative supply voltage for the VSS pin. Verify that the 24-pin SSOP package fits the PCB layout constraints. Consider the internal reference drift specifications if high precision is required across wide temperature ranges.

Analog To Digital Converters (ADC) Part Context

The MAX122BEWG+ belongs to the MAX120/MAX122 family of 12-bit ADCs manufactured by Analog Devices / Maxim Integrated. This series combines high-speed sampling with low-power consumption and integrated reference circuitry. The BEWG suffix indicates a specific package configuration and operating temperature range within this product line.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX120C/E variants offer higher throughput at 500ksps but require different clock synchronization. The MAX121 provides a serial interface alternative. Verify pin compatibility and timing parameters before substituting any other component in the MAX12x series.