Datasheet
Table Of Contents
- Package Types
- Typical Application
- 1.0 Electrical Characteristics
- 2.0 Typical Performance Curves
- Figure 2-1: Input Offset Voltage
- Figure 2-2: Input Offset Voltage Drift
- Figure 2-3: Input Offset Voltage vs. Common Mode Input Voltage
- Figure 2-4: Input Offset Voltage vs. Common Mode Input Voltage
- Figure 2-5: Input Offset Voltage vs. Output Voltage
- Figure 2-6: Input Offset Voltage vs. Power Supply Voltage
- FIGURE 2-7: Input Noise Voltage Density vs. Frequency.
- FIGURE 2-8: Input Noise Voltage Density vs. Common Mode Input Voltage.
- FIGURE 2-9: CMRR, PSRR vs. Frequency.
- FIGURE 2-10: CMRR, PSRR vs. Ambient Temperature.
- FIGURE 2-11: Input Bias, Offset Currents vs. Ambient Temperature.
- FIGURE 2-12: Input Bias Current vs. Common Mode Input Voltage.
- FIGURE 2-13: Quiescent Current vs. Ambient Temperature.
- FIGURE 2-14: Quiescent Current vs. Common Mode Input Voltage.
- FIGURE 2-15: Quiescent Current vs. Common Mode Input Voltage.
- FIGURE 2-16: Quiescent Current vs. Power Supply Voltage.
- FIGURE 2-17: Open-Loop Gain, Phase vs. Frequency.
- FIGURE 2-18: DC Open-Loop Gain vs. Ambient Temperature.
- FIGURE 2-19: Gain Bandwidth Product, Phase Margin vs. Ambient Temperature.
- FIGURE 2-20: Gain Bandwidth Product, Phase Margin vs. Ambient Temperature.
- FIGURE 2-21: Output Short Circuit Current vs. Power Supply Voltage.
- FIGURE 2-22: Output Voltage Swing vs. Frequency.
- FIGURE 2-23: Output Voltage Headroom vs. Output Current.
- FIGURE 2-24: Output Voltage Headroom vs. Output Current.
- FIGURE 2-25: Output Voltage Headroom vs. Ambient Temperature.
- FIGURE 2-26: Output Voltage Headroom vs. Ambient Temperature.
- FIGURE 2-27: Slew Rate vs. Ambient Temperature.
- FIGURE 2-28: Small Signal Non-Inverting Pulse Response.
- FIGURE 2-29: Small Signal Inverting Pulse Response.
- FIGURE 2-30: Large Signal Non-Inverting Pulse Response.
- FIGURE 2-31: Large Signal Inverting Pulse Response.
- FIGURE 2-32: The MCP6491/2/4 Shows No Phase Reversal.
- FIGURE 2-33: Closed Loop Output Impedance vs. Frequency.
- FIGURE 2-34: Measured Input Current vs. Input Voltage (below VSS).
- FIGURE 2-35: Channel-to-Channel Separation vs. Frequency (MCP6492/4 only).
- 3.0 Pin Descriptions
- 4.0 Application Information
- 5.0 Design Aids
- 6.0 Packaging Information
- Appendix A: Revision History
- Product Identification System
- Trademarks
- Worldwide Sales and Service
2012-2013 Microchip Technology Inc. DS20002321C-page 21
MCP6491/2/4
5.0 DESIGN AIDS
Microchip Technology Inc. provides the basic design
tools needed for the MCP6491/2/4 family of op amps.
5.1 SPICE Macro Model
The latest SPICE macro model for the MCP6491/2/4
op amps is available on the Microchip web site at
www.microchip.com. The model was written and tested
in PSpice, owned by Orcad (Cadence
®
). For other
simulators, translation may be required.
The model covers a wide aspect of the op amp’s
electrical specifications. Not only does the model cover
voltage, current and resistance of the op amp, but it
also covers the temperature and noise effects on the
behavior of the op amp. The model has not been
verified outside the specification range listed in the op
amp data sheet. The model behaviors under these
conditions cannot be guaranteed to match the actual
op amp performance.
Moreover, the model is intended to be an initial design
tool. Bench testing is a very important part of any
design and cannot be replaced with simulations. Also,
simulation results using this macro model need to be
validated by comparing them to the data sheet
specifications and characteristic curves.
5.2 FilterLab Software
Microchip’s FilterLab software is an innovative software
tool that simplifies analog active filter (using op amps)
design. Available at no cost from the Microchip web site
at www.microchip.com/filterlab, the FilterLab design
tool provides full schematic diagrams of the filter circuit
with component values. It also outputs the filter circuit
in SPICE format, which can be used with the macro
model to simulate actual filter performance.
5.3 MAPS (Microchip Advanced Part
Selector)
MAPS is a software tool that helps semiconductor
professionals efficiently identify Microchip devices that
fit a particular design requirement. Available at no cost,
MAPS is an overall selection tool for Microchip’s
product portfolio that includes analog, memory, MCUs
and DSCs. Using this tool, you can define a filter to sort
features for a parametric search of devices and export
side-by-side technical comparison reports. Helpful links
are also provided for data sheets, purchases and
sampling of Microchip parts. The web site is available
at www.microchip.com/maps.
5.4 Analog Demonstration and
Evaluation Boards
Microchip offers a broad spectrum of Analog
Demonstration and Evaluation Boards that are
designed to help you achieve faster time to market. For
a complete listing of these boards and their
corresponding user’s guides and technical information,
visit the Microchip web site:
www.microchip.com/analogtools.
Some boards that are especially useful include:
• MCP6XXX Amplifier Evaluation Board 1
• MCP6XXX Amplifier Evaluation Board 2
• MCP6XXX Amplifier Evaluation Board 3
• MCP6XXX Amplifier Evaluation Board 4
• Active Filter Demo Board Kit
• 5/6-Pin SOT-23 Evaluation Board, part number
VSUPEV2
• 8-Pin SOIC/MSOP/TSSOP/DIP Evaluation Board,
part number SOIC8EV
5.5 Application Notes
The following Microchip analog design note and
application notes are available on the Microchip web
site at www.microchip.com/appnotes, and are
recommended as supplemental reference resources.
• ADN003: “Select the Right Operational Amplifier
for your Filtering Circuits”, DS21821
• AN722: “Operational Amplifier Topologies and DC
Specifications”, DS00722
• AN723: “Operational Amplifier AC Specifications
and Applications”, DS00723
• AN884: “Driving Capacitive Loads With Op
Amps”, DS00884
• AN990: “Analog Sensor Conditioning Circuits –
An Overview”, DS00990
• AN1177: “Op Amp Precision Design: DC Errors”,
DS01177
• AN1228: “Op Amp Precision Design: Random
Noise”, DS01228
• AN1297: “Microchip’s Op Amp SPICE Macro
Models”’ DS01297
• AN1332: “Current Sensing Circuit Concepts and
Fundamentals”’ DS01332
• AN1494: “Using MCP6491 Op Amps for Photode-
tection Applications” DS01494
These application notes and others are listed in:
• “Signal Chain Design Guide”, DS21825