The operational amplifier is an important device widely used in electronic circuits to amplify voltage signals. There are many popular operational amplifier models on the spot market, and the prices vary. This article will introduce some popular operational amplifier models and their prices.

1. LM741 LM741 is a classic operational amplifier, widely used in various electronic circuits. It has the characteristics of high gain, high input impedance and low input bias current. In the spot market, the price of LM741 is about 1 US dollar.

2. TL071 TL071 is a low-noise, high-gain operational amplifier suitable for applications requiring high fidelity, such as audio amplification. In the spot market, the price of TL071 is about US$1.5.

3. OP07 OP07 is a high-precision, low-noise operational amplifier suitable for applications requiring high-precision amplification. In the spot market, the price of OP07 is about US$2.

4. AD827 AD827 is a high-speed, high-precision operational amplifier suitable for applications requiring high-speed signal processing. In the spot market, the price of AD827 is about $3.

5. OPA2134 OPA2134 is a high-performance, low-distortion operational amplifier suitable for applications requiring high fidelity, such as audio amplification. In the spot market, the price of OPA2134 is about $4.

In general, the price of popular op amp models on the spot market ranges from $1 to $4, depending on the performance and brand of the model. Choosing an op amp model that suits your application requirements can save costs while ensuring performance. I hope this article will be helpful to you.