Function Generator ICs

A function generator is also known as a waveform generator and is an electronic device which has a very wide frequency range that can be used to produce different waveforms as its output signal. They are very versatile instruments as they can produce a wide variety of waveforms, frequencies, amplitude and duty cycle and each is suitable for different applications. Function generators called arbitrary waveform generators will allow you to generate any waveform and shape you want.


They are typically used to test analogue devices such as amplifiers and communications equipment, production testing and equipment maintenance.


There are various function generator ICs (or waveform generator ICs) available and all can be incorporated into a circuit to produce the different periodic waveforms required, common output wave types include:


  • Sine or sinusoidal - consists of a single frequency, looks like a continuous wave and can be easily generated, considered the most fundamental building block of sound

  • Square – non-sinusoidal waveform (has multiple sine waves of different frequencies), contains odd harmonics. Found in electronics and signal processing. Used as timing references

  • Triangle – non-sinusoidal, triangular in shape. Like the square, contains odd harmonics of the fundamental frequency but the power of harmonics is twice as low as their analogues in the square wave.

  • Sawtooth or saw wave – non-sinusoidal, looks like the teeth of a saw. Contains both even and odd harmonics ideal for musical sounds.

How do function generator circuits work?


A basic function generator circuit produces, for example, a triangular waveform at a frequency that can be controlled. The triangular wave is used as the base for all of the circuit’s other outputs, which are generated by charging and discharging a capacitor (used to store an electric charge) to shape the waveform. As the output voltage reaches an upper or lower limit, the charging or discharging is reversed by a comparator (a device used to compare two electrical signals). Different frequencies can then be achieved by varying the size of the capacitor and charge current, as well as the frequency of the base triangular wave.


Difference between a signal generator and a function generator?


A function generator produces the same waves as a signal generator but also custom shapes (advantage this device has). Some have high speed digital to analogue converters that can emulate all sorts of shapes for the signal. Sometimes there are filters to remove undesired harmonics at the output and their frequency range is usually limited at the upper levels.

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Part Details Brand Maximum Frequency Maximum Duty Cycle Mounting Type Package Type Pin Count Dimensions Height Length Maximum Operating Supply Voltage Maximum Operating Temperature Maximum Output Frequency Minimum Operating Supply Voltage Minimum Operating Temperature Width
Silicon Labs Si52142-A01AGM, Function Generator IC 25MHz 55%, 24-Pin QFN Silicon Labs 25MHz 55% Surface Mount QFN 24 4 x 4 x 0.75mm 0.75mm 4mm 3.465 V +85 °C 100MHz 3.135 V -40 °C 4mm
Silicon Labs Si5351A-B-GT, Function Generator IC 100MHz 55%, 10-Pin MSOP Silicon Labs 100MHz 55% Surface Mount MSOP 10 4 x 4 x 0.85mm 0.85mm 4mm 3.6 V +85 °C 160MHz 3 V -40 °C 4mm
Analog Devices AD2S99APZ, Voltage Controlled Oscillator, 20-Pin P-20A Analog Devices - - Surface Mount P-20A 20 9.04 x 8.38 x 3.94mm 3.94mm 9.04mm ±5.25 V +85 °C - ±4.75 V -40 °C 8.38mm
Silicon Labs Si52112-A2-GT, Function Generator IC 25MHz 55%, 8-Pin TSSOP Silicon Labs 25MHz 55% Surface Mount TSSOP 8 3.1 x 4.5 x 1.05mm 1.05mm 3.1mm 3.46 V +85 °C 100MHz 3.13 V -40 °C 4.5mm
Silicon Labs Si52144-A01AGM, Function Generator IC 25MHz 55%, 24-Pin QFN Silicon Labs 25MHz 55% Surface Mount QFN 24 4 x 4 x 0.75mm 0.75mm 4mm 3.465 V +85 °C 100MHz 3.135 V -40 °C 4mm
Analog Devices AD2S99BPZ, Voltage Controlled Oscillator, 20-Pin PLCC Analog Devices - - Surface Mount PLCC 20 9.04 x 8.38 x 3.94mm 3.94mm 9.04mm ±5.25 V +85 °C - ±4.75 V -40 °C 8.38mm
Silicon Labs Si5351C-B-GM, Function Generator IC 27MHz 55%, 20-Pin QFN Silicon Labs 27MHz 55% Surface Mount QFN 20 4 x 4 x 0.85mm 0.85mm 4mm 2.75 V +85 °C - 2.25 V -40 °C 4mm
Silicon Labs SL28SRC01BZI, Function Generator IC 14.3182MHz 55%, 16-Pin TSSOP Silicon Labs 14.3182MHz 55% Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 3.465 V +85 °C - 3.135 V -40 °C 4.5mm
Maxim MAX2623EUA+, Function Generator IC 950MHz, 8-Pin μMAX Maxim 950MHz - Surface Mount μMAX 8 3.05 x 3.05 x 0.95mm 0.95mm 3.05mm 5.5 V +85 °C - 2.7 V -40 °C 3.05mm
Analog Devices AD5930YRUZ, Function Generator IC, 20-Pin TSSOP Analog Devices - - Surface Mount TSSOP 20 6.5 x 7.6 x 1.05mm 1.05mm 6.5mm - +125 °C - - -40 °C 4.4mm
Analog Devices AD5932YRUZ, Function Generator IC, 16-Pin TSSOP Analog Devices - - Surface Mount TSSOP 16 5 x 4.4 x 1.05mm 1.05mm 5mm - +105 °C - - -40 °C 4.4mm
Analog Devices AD9548BCPZ, Function Generator IC 1GHz 60%, 88-Pin LFCSP VQ Analog Devices 1GHz 60% Surface Mount LFCSP VQ 88 12.1 x 12.1 x 0.85mm 0.85mm 12.1mm 3.465 V +85 °C 1000MHz 3.135 V -40 °C 12.1mm
Silicon Labs Si5338C-B-GM, Function Generator IC 710MHz 55%, 24-Pin QFN Silicon Labs 710MHz 55% Surface Mount QFN 24 4 x 4 x 0.85mm 0.85mm 4mm 3.63 V +85 °C 200MHz 1.71 V -40 °C 4mm
Silicon Labs Si5338A-B-GM, Function Generator IC 710MHz 55%, 24-Pin QFN Silicon Labs 710MHz 55% Surface Mount QFN 24 4 x 4 x 0.85mm 0.85mm 4mm 3.63 V +85 °C 710MHz 1.71 V -40 °C 4mm
Analog Devices AD2S99APZ, Function Generator IC, 20-Pin P-20A Analog Devices - - Surface Mount P-20A 20 9.04 x 8.38 x 3.94mm 3.94mm 9.04mm ±5.25 V +85 °C - ±4.75 V -40 °C 8.38mm
Analog Devices AD2S99BPZ, Voltage Controlled Oscillator, 20-Pin PLCC Analog Devices - - Surface Mount PLCC 20 9.04 x 8.38 x 3.94mm 3.94mm 9.04mm ±5.25 V +85 °C - ±4.75 V -40 °C 8.38mm
Analog Devices AD5930YRUZ, Function Generator IC, 20-Pin TSSOP Analog Devices - - Surface Mount TSSOP 20 6.5 x 7.6 x 1.05mm 1.05mm 6.5mm - +125 °C - - -40 °C 4.4mm
Analog Devices AD5932YRUZ, Function Generator IC, 16-Pin TSSOP Analog Devices - - Surface Mount TSSOP 16 5 x 4.4 x 1.05mm 1.05mm 5mm - +105 °C - - -40 °C 4.4mm
Analog Devices AD9520-4BCPZ, Function Generator IC 250MHz 50%, 64-Pin LFCSP VQ Analog Devices 250MHz 50% Surface Mount LFCSP VQ 64 9.1 x 9.1 x 0.95mm 0.95mm 9.1mm 3.465 V +85 °C 1800MHz 3.135 V -40 °C 9.1mm
Analog Devices AD9548BCPZ, Function Generator IC 1GHz 60%, 88-Pin LFCSP VQ
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Analog Devices 1GHz 60% Surface Mount LFCSP VQ 88 12.1 x 12.1 x 0.85mm 0.85mm 12.1mm 3.465 V +85 °C 1000MHz 3.135 V -40 °C 12.1mm
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