MAX5165LCCM+

Overview

The MAX5165LCCM+ is a 32-channel sample/hold amplifier with a single multiplexed input, manufactured by Analog Devices Inc./Maxim Integrated. It integrates four 1-to-8 multiplexers and 32 buffered sample/hold circuits in a 48-pin TQFP package. The device operates with +10V and -5V analog supplies and a separate +5V digital logic supply. Key electrical parameters include a typical acquisition time of 2.5µs for an 8V step to 0.01% accuracy, a hold mode droop rate of 1mV/sec, and a hold step of 0.25mV. Output impedance options are 50Ω, 500Ω, or 1kΩ. The operating temperature range is 0°C to +70°C.

Feature Summary

• Integrates four independent 1-to-8 analog multiplexers feeding 32 buffered sample/hold channels from a single analog input.
• Features output clamping diodes allowing voltage restriction between two external reference levels.
• Provides high-accuracy signal acquisition with low droop rate and minimal hold step error during transitions.
• Includes internal series output resistors for flexible output filtering and design adaptation.

Applications

• Automatic Test Equipment (ATE)
• Industrial Process Controls
• Arbitrary Function Generators
• Avionics Equipment

Procurement Notes

Verify the specific suffix LCCM+ corresponds to the 0°C to +70°C commercial temperature grade and 50Ω output impedance variant. Confirm the component status as obsolete or limited availability through official manufacturer channels before finalizing procurement plans. Ensure power supply requirements (+10V, -5V, +5V) match system capabilities.

Selection Notes

Select this component when a single-input source must be distributed across multiple parallel sampling paths. The integrated multiplexer structure reduces control line complexity compared to discrete solutions. Consider the 50Ω output impedance option if downstream filtering requirements necessitate a specific source resistance value for the application circuit.

Part Context

This part belongs to the MAX5165 family of 32-channel sample/hold amplifiers. Variants within the family differ primarily by output impedance values (50Ω, 500Ω, 1kΩ) and operating temperature ranges (commercial vs. industrial). The LCCM+ designation specifically identifies the commercial grade version with 50Ω output resistance packaged in a 48-pin TQFP.

Replacement Considerations

Direct substitutes include MAX5165MECM+ and MAX5165NECM+, which share the same functional architecture but offer different output impedances (500Ω and 1kΩ respectively) and extended temperature ranges (-40°C to +85°C). Verify pin compatibility and thermal performance when substituting.

FAQ

How does the MAX5165 handle simultaneous sampling?

The device allows simultaneous sampling on up to four channels by asserting multiple mode-select inputs (M0–M3) low simultaneously. This samples the addressed channel across different multiplexers concurrently, though it increases the required acquisition time proportionally.

What is the function of the CH and CL pins?

The CH (Clamp High) and CL (Clamp Low) pins allow the user to restrict the output voltage range using external reference voltages. Internal diodes clamp the output to approximately VCH + 0.7V and VCL - 0.7V.