2011年9月29日 星期四

Linear Tech--- Design tools

http://www.linear.com/designtools/software/#LTspice

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more.


LTspice IV

LTspice IV is a high performance SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators.  Our enhancements to SPICE have made simulating switching regulators extremely fast compared to normal SPICE simulators, allowing the user to view waveforms for most switching regulators in just a few minutes. Included in this download are LTspice IV, Macro Models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.
LTpowerCAD
The LTpowerCAD design tool is a Microsoft Excel based power supply design tool program that can significantly ease the tasks of power supply design with Linear Technology µModule and some monolithic products. Unlike conventional simulation tools, this tool guides users throughout the whole supply design process: it searches suitable LTC parts according to user’s supply specifications; then it guides the user to select and optimize circuit component values with suggestions and warnings. The tool shows real-time results of feedback loop bode plot, as well as the power stage performance. The design can be exported to LTspice; simulation circuit for users to further verify their designs. The tool also provides PCB layout example and a design summary. Currently, this design tool support Microsoft Excel 2000, 2002, 2003, 2007 and 2010 on a Windows based computer. Contact LTpowerCAD@linear.com for questions or support.
Download LTpowerCAD LTpowerCAD Users Guide LTpowerCAD Quick Start List of Products Supported by LTpowerCAD

LTpowerPlay
LTpowerPlay is a powerful Windows based development environment that supports Linear Technology digital power ICs with EEPROM, like the LTC2978 Octal PMBus Power Supply Monitor and Controller and the LTC3880 Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management. The software supports a variety of different tasks. You can use LTpowerPlay to evaluate Linear Technology ICs by connecting to a demo board system. LTpowerPlay can also be used in an offline mode (with no hardware present) in order to build a multi-chip configuration file that can be saved and re-loaded at a later time. LTpowerPlay provides unprecedented diagnostic and debug features. It becomes a valuable diagnostic tool during board bring-up to program or tweak the power management scheme in a system or to diagnose power issues when bringing up rails. LTpowerPlay utilizes the DC1427A USB-to-SMBus controller to communicate with one of many potential targets, including the DC1540 demo board set, the DC1508 socketed programming board, or a customer target system. The software also provides an automatic update feature to keep the software current with the latest set of device drivers and documentation.

Step 1: Download and Install LTpowerPlay
Step 2: Request an LTpowerPlay License
  • When LTpowerPlay launches the first time, it will prompt you to request a license
  • Click 'Request a License Key...'
  • Enter the Required Information
  • Click 'Send License Request'
Step 3: Install your LTpowerPlay License File
  • You will receive an email with your license file and instructions for installing it
Spice Models
Download the complete library of LTC op amp SPICE models for general analog circuit simulations. These models are designed for compatibility with LTspice (SwitcherCAD), PSPICE, and PSPICE-compatible simulation programs. They may require a syntax conversion for use with other simulation programs.
Download Spice Models (Updated August 2008) Download LTspice IV (Updated September 23, 2011 )

The Configurator
The "Configurator" is a design tool that generates the complete schematic for an amplifier stage designed with one of Linear Technology's Gain Selectable Amplifiers: the LT1991, LT1995 and LT1996. With hundreds of combinations, theses amplifiers can be configured for inverting, non-inverting, differencing and even buffered attenuation through simple pin strapping.

Download The Configurator (Updated June 2005) LT1991 Precision, 100µA Gain Selectable Amplifier LT1995 30MHz, 1000V/µs Gain Selectable Amplifier LT1996 Precision, 100µA Gain Selectable Amplifier
http://www.linear.com.cn/designtools/software/
http://denethor.wlu.ca/ltspice/
http://circuits.linear.com/all--signal_gain_*_filter-439
http://www.filter-solutions.com/active.html#Element Sensitivity

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