What Is the TL071? JFET-Input Single Op-Amp: Pinout and Uses
The TL071 is a JFET-input single operational amplifier. Its high input impedance, low noise and high speed (~3 MHz, ~13 V/µs) make it the modern, pin-compatible replacement for the 741. It is used in audio preamps and high-impedance sensor buffers; its input does not reach ground.
The TL071 is a JFET-input single operational amplifier (op-amp). It shares the character of its dual version, the TL072: high input impedance, low noise and much higher speed than the classic LM741. It is in fact the modern, pin-compatible replacement for the 741. For the concept, see what is an op-amp.
What is the TL071 used for?
Audio preamps, active filters, high-impedance sensor buffers and general-purpose amplification. Because its JFET input draws almost no current from the source, it is ideal for piezo, microphone and high-impedance signal sources.
TL071 pinout (DIP-8)
| Pin | Function |
|---|---|
| 1 | Offset null |
| 2 | Input − (inverting) |
| 3 | Input + (non-inverting) |
| 4 | V− (negative supply) |
| 5 | Offset null |
| 6 | Output (OUT) |
| 7 | V+ (positive supply) |
| 8 | NC (no connection) |
The pinout is the same as the classic single op-amp (741) → it drops into 741 circuits directly.
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 | 1 |
Limitations
- Its input does not reach ground (V−) → not directly suited to single-supply ground-sensing work.
- The output is not rail-to-rail.
- The JFET gate is sensitive to static electricity.
TL071 equivalents and alternatives
- TL072: the dual version.
- TL074: the quad version.
- LM741: the classic bipolar single (slower).
- NE5534: for low-noise audio.
Find it in our catalog
To compare price and stock for the TL071 and its alternatives, use the TL071 search. For gain, use the Op-Amp Gain Calculator.