In my current design the operating temperature range is rather large: -55C to 125C. I am planning on using the LM124DT from ST in an analog PWM circuit. My design uses a 0.5 to 4.5v triangle wave at 25kHz (required slew rate 0.2V/us). The LM124DT has a "typical" slew rate of 0.4V/us at 25C. A minimum slew rate is not specified and slew is not specified at other temperatures. Other manufacturers such as TI don't seem to specify this either. I would like to get an intuitive sense of how (or if) slew rate might change over temperature. Additionally I'd like to get some opinions as to whether 0.2V/us could be too fast for the LM124. Thanks, Jason White --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .