I've used the ML2035 and ML2036 from Micro Linear before. Programmable frequency 0-50kHz Frequency resolution 1.5Hz Harmonic Distortion -45dB max Uses a serial interface like SPI Roger Roger H. Anderson Bioengineering The University of Iowa 54 Medical Research Facility Iowa City, IA 52242-1183 (319) 335-8644 -----Original Message----- From: Gerhard Fiedler [mailto:lists@HOME.COM] Sent: Friday, February 26, 1999 11:24 AM To: PICLIST@MITVMA.MIT.EDU Subject: Re: PIC A/D, pre-amplify small singnal more than large signals ? At 22:50 02/25/99 -0800, Bill Arkin wrote: >I was hoping that there might be some IC's now with I2C or 3 wire interface >for direct generation of sine or square wave as well as signal amplitude >control. Anyone know of such devices? i was just looking for a digitally controlled sine oscillator, but i couldn't find any. if you come up with something, i'd appreciate a note. ge