What Is the TL072? JFET-Input Dual Op-Amp: Pinout and Uses
The TL072 is a JFET-input dual operational amplifier (op-amp). Its very high input impedance, low noise and high speed (~3 MHz, ~13 V/µs) make it a favourite for audio preamps, active filters and effect pedals. Its input does not reach ground, so it is not suited to single-supply ground-sensing work; the LM358 is better there.
The TL072 is a JFET-input dual operational amplifier (op-amp). With very high input impedance, low noise and far higher speed than the LM358, it is a favourite for audio and high-impedance sources. For the concept, see what is an op-amp.
What is the TL072 used for?
Audio preamps, active filters, mixer/tone stages, guitar effect pedals and buffers that need high input impedance are the most common uses. Thanks to its JFET input it draws almost no current from the source.
TL072 pinout (DIP-8 / SOIC-8)
| Pin | Function |
|---|---|
| 1 | Output A |
| 2 | Input A − |
| 3 | Input A + |
| 4 | V− (negative supply) |
| 5 | Input B + |
| 6 | Input B − |
| 7 | Output B |
| 8 | V+ (positive supply) |
The pinout is the standard dual op-amp layout (same as the LM358) → the two are often tried in place of each other.
Key electrical specifications
| Parameter | Typical value |
|---|---|
| Input type | JFET (very high input impedance) |
| Supply (dual) | ±5 V – ±18 V |
| GBW | ~3 MHz |
| Slew rate | ~13 V/µs |
| Number of op-amps | 2 |
TL072 or LM358?
For audio and measurement that need speed, low noise and high input impedance, the TL072 is clearly superior (~3 MHz / ~13 V/µs). But the TL072's input does not reach ground; for single-supply, ground-sensing, low-cost general work the LM358 is a better fit. The choice depends on the application.
Limitations
- Its input does not reach V− (ground) → not suited to direct single-supply ground-sensing work.
- The output is not rail-to-rail.
- The JFET gate is sensitive to static electricity at the input.
TL072 equivalents and alternatives
- TL071: the single version.
- TL074: the quad version.
- NE5532: lower noise, for demanding audio.
- LM358: single supply, senses ground, cheaper.
Find it in our catalog
To compare price and stock for the TL072 and its alternatives, use the TL072 search. For gain, use the Op-Amp Gain Calculator.