MAX122ACNG+

Analog To Digital Converters (ADC) Overview

The MAX122ACNG+ is a 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 -5V internal voltage reference. The device features a 2.6µs conversion time, enabling throughput rates of 333ksps. It accepts bipolar analog input voltages ranging from -5V to +5V, which are overvoltage tolerant to ±15V. Power requirements include a positive supply (VDD) of +4.75V to +5.25V and a negative supply (VSS) of -10.8V to -15.75V. The component operates within a temperature range of 0°C to +70°C and is housed in a 24-pin Narrow DIP package.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a track/hold circuit with a 350ns acquisition time and a low-drift buried-zener voltage reference.
• Features a standard microprocessor interface with three-state data outputs compatible with TTL/CMOS logic levels.
• Supports five operational modes including full-control, stand-alone, slow-memory, ROM, and continuous-conversion configurations.
• Provides separate control inputs for the track/hold function and supports direct interfacing with FIFO buffers.

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 'C' indicates the commercial temperature range (0°C to +70°C) and 'NG' denotes the 24-pin Narrow DIP package. Confirm RoHS compliance status as indicated by the '+' suffix. Ensure power supply rails match the specified VDD (+5V) and VSS (-12V or -15V) requirements for optimal performance.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution and 333ksps throughput are required for single-ended bipolar signals. Consider the MAX120 if a faster 500ksps rate is needed, or the MAX121 if a serial interface is preferred over parallel. Ensure the system can provide the necessary negative supply voltage for the bipolar input range.

Analog To Digital Converters (ADC) Part Context

The MAX122ACNG+ belongs to the MAX120/MAX122 family of high-speed, low-power ADCs. This series combines BiCMOS technology with successive approximation architecture to deliver precise analog-to-digital conversion. The MAX122 variant specifically offers a slower conversion speed compared to the MAX120 but maintains high accuracy and low power dissipation.

Analog To Digital Converters (ADC) Replacement Considerations

MAX120ACNG+ offers identical pinout and functionality with a faster 500ksps throughput rate. MAX122AEAG+ provides the same specifications but in an SSOP package with an extended industrial temperature range (-40°C to +85°C). Verify package compatibility and thermal requirements before substitution.