SMP04EP

Special Purpose Amplifiers Overview

The SMP04EP is a monolithic quad sample-and-hold amplifier manufactured in Analog Devices' advanced oxide isolated CMOS technology. It integrates four independent precision buffer amplifiers and internal hold capacitors within a 16-lead Plastic DIP package. The device supports single or dual power supplies ranging from 7 to 15 volts, featuring TTL/CMOS compatible logic inputs. Key electrical characteristics include a typical acquisition time of 3.5 microseconds for an 8-bit signal, a maximum droop rate of 25 mV/s, and a supply current of 47 mA at +12 V. It operates reliably across a temperature range of -40°C to +85°C.

Special Purpose Amplifiers Feature Summary

• Integrates four independent track-and-hold channels with on-chip hold capacitors to minimize board space and design complexity.
• Features high accuracy with low offset voltage and very low droop rate suitable for precision data acquisition systems.
• Includes output buffers stable for capacitive loads up to 500 pF, eliminating potential stability issues associated with external buffering.
• Operates with TTL/CMOS compatible logic inputs and maintains compatibility over the full supply voltage range.

Special Purpose Amplifiers Applications

• Multichannel Data Acquisition Systems
• Signal Processing Systems
• Automatic Test Equipment
• DAC Deglitching

Special Purpose Amplifiers Procurement Notes

Verify the specific ordering suffix EP corresponds to the 16-lead Plastic DIP (N-16) package configuration. Confirm that the required operating temperature range meets the -40°C to +85°C specification. Ensure power supply bypassing guidelines are followed, particularly connecting the VSS pin to a clean ground in single-supply applications to prevent noise coupling to the internal hold capacitor.

Special Purpose Amplifiers Selection Notes

Select this component when a compact solution for multiple simultaneous sampling channels is required without external hold capacitors. Consider the 3.5 microsecond acquisition time and 25 mV/s maximum droop rate against system settling requirements. Evaluate the need for single versus dual supply operation, noting that output voltage range and performance metrics vary based on the chosen supply configuration.

Special Purpose Amplifiers Part Context

The SMP04EP belongs to the SMP04 family of monolithic quad sample-and-hold amplifiers. This series utilizes advanced oxide isolated CMOS technology to achieve high accuracy and fast acquisition times. The EP variant specifically denotes the plastic DIP packaging option, distinguishing it from the cerdip (EQ) and small outline (ES) packages available within the same functional family.

Special Purpose Amplifiers Replacement Considerations

SMP04ES: SO-16 package equivalent.

Special Purpose Amplifiers FAQ

How does the SMP04 handle ground connections in single-supply mode?

In single-supply applications, the VSS pin must be connected to a clean analog ground because the internal hold capacitor is tied to VSS. Noise on this pin directly couples to the output, degrading signal-to-noise performance.

What is the maximum capacitive load the SMP04 can drive stably?

The on-chip output buffers are designed to remain stable with capacitive loads up to 500 pF without overshoot exceeding 30%.