MAX122BCNG+

Analog To Digital Converters (ADC) Overview

The MAX122BCNG+ is a complete, BiCMOS, sampling 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated. It integrates an on-chip track/hold circuit and a low-drift voltage reference. The device accepts bipolar analog input voltages ranging from -5V to +5V and operates with a positive supply of +4.75V to +5.25V and a negative supply of -10.8V to -15.75V. It features a 2.6µs conversion time resulting in a throughput rate of 333ksps. The component utilizes a standard microprocessor interface with three-state data outputs compatible with TTL/CMOS logic.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a track/hold circuit and a low-drift internal voltage reference
• Accepts ±5V bipolar analog input signals with overvoltage tolerance up to ±15V
• Provides a standard microprocessor interface with three-state data outputs
• Supports multiple operational modes including continuous-conversion and FIFO buffering

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 BCNG against the manufacturer's current ordering guide to confirm package type and temperature range. Ensure the negative supply voltage requirements are met within the specified limits for reliable operation. Confirm RoHS compliance status if required by local regulations.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution and 333ksps throughput are required. It is suitable for systems needing a single-supply +5V and a negative rail between -10.8V and -15.75V. Consider the PDIP-24 package for through-hole mounting applications requiring robust mechanical stability.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MAX120/MAX122 family of high-speed ADCs. While the MAX120 offers faster 500ksps throughput, the MAX122 provides a lower clock frequency requirement of up to 5MHz compared to the MAX120's 8MHz limit. Both share similar architectural features and pinouts.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX120BCNG+ is a functional alternative within the same family, offering higher throughput but requiring a faster clock source. Verify compatibility regarding clock frequency limits and power supply configurations before substitution.

Analog To Digital Converters (ADC) FAQ

What is the maximum clock frequency for the MAX122BCNG+?

The MAX122BCNG+ accepts clock frequencies in the range of 0.1MHz to 5MHz.

How is the INT/BUSY output configured?

The MODE pin determines the function: connecting it to VDD configures it as an interrupt output, while leaving it open or tying it to DGND configures it as a busy output.

What external components are required for the reference voltage?

A 22µF electrolytic capacitor (with ESR ≤ 100mΩ) and a 0.1µF ceramic capacitor must be connected from the VREF pin to AGND.