MAX134EPL+

ADCs/DACs - Special Purpose Overview

The MAX134EPL+ is a monolithic integrated circuit designed for 3¾ digit digital multimeter (DMM) applications. It integrates a high-precision analog front end, a successive-approximation register (SAR) analog-to-digital converter (ADC), and a microcontroller interface into a single package. The device operates from a single +5V supply and features an internal reference voltage source. It supports multiple input ranges including ±400mV, ±4V, ±40V, and ±400V DC, as well as AC voltage measurements. The component provides a parallel data output compatible with standard microcontrollers.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 3¾ digit DMM solution combining ADC, analog front end, and control logic
• Internal precision reference voltage source eliminates external components
• Supports DC voltage measurement ranges of ±400mV, ±4V, ±40V, and ±400V
• Includes AC voltage measurement capability with selectable integration times
• Features a parallel interface with ALE, Chip Select, Read, and Write signals

ADCs/DACs - Special Purpose Applications

• Handheld digital multimeters
• Benchtop digital multimeters
• Panel-mounted digital voltmeters
• Industrial process control instrumentation

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'EPL+' to confirm the extended temperature range (-40°C to +85°C) and lead-free RoHS compliance status. Confirm that the 40-lead plastic DIP package matches the target PCB footprint requirements. Check current production status directly with Analog Devices or authorized distributors as availability may vary.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX134EPL+ over the MAX133 series when AC voltage measurement functionality is required, as the MAX133 lacks this feature. Ensure the design utilizes a single +5V power supply. Verify that the system can accommodate the 40-lead DIP package dimensions and pinout. Consider the MAX134CPL+ if operation is restricted to commercial temperatures (0°C to +70°C).

ADCs/DACs - Special Purpose Part Context

The MAX134EPL+ belongs to the MAX133/MAX134 family of specialized mixed-signal ICs. These devices are engineered specifically to simplify the design of 3¾ digit DMMs by consolidating functions that would otherwise require multiple discrete components. The 'E' designation indicates the industrial temperature grade, while 'PL+' denotes the 40-lead plastic DIP package with RoHS-compliant termination.

ADCs/DACs - Special Purpose Replacement Considerations

The MAX133EPL+ serves as a functional substitute if AC measurement capabilities are not needed in the application. Both parts share identical pinouts and core ADC architecture. Verify that the replacement part meets the specific thermal and electrical requirements of the existing design.