8038 ic
The ICL8038 waveform generator was an Integrated circuit by Intersil designed to generate accurate sine, square & triangular waveforms based on bipolar monolithic technology involving Schottky barrier diodes. Triangular waves were produced by charging and discharging a capacitor with constant currents. The triangular waves were converted to sine waves involving a non-linear network of transistors and thin-film resistors.
The output frequency was set by resistors or capacitors and covered a range from 0.001 Hz to more than 300 kHz. An external control voltage would accomplish frequency sweeping or frequency modulation. The temperature drift could be optimized to less than 250ppm/°C by combining it with a PLL.
Maxim designed a copy of the ICL8038 and marketed it as the MAX038. Both devices have since been discontinued.
Features
• Low Frequency Drift with Temperature. . . . . . .250ppm/°C
• Low Distortion. . . . . . . . . . . . . . . . 1% (Sine Wave Output)
• High Linearity . . . . . . . . . . . 0.1% (Triangle Wave Output)
• Wide Frequency Range . . . . . . . . . . . 0.001Hz to 300kHz
• Variable Duty Cycle . . . . . . . . . . . . . . . . . . . . . 2% to 98%
• High Level Outputs . . . . . . . . . . . . . . . . . . . . . . TTL to 28V
• Simultaneous Sine, Square, and Triangle Wave Outputs
• Easy to Use - Just a Handful of External Components
References
1) http://www.intersil.com/products/deviceinfo.asp?pn=ICL8038 www.intersil.com/data/fn/fn2864.pd
