Overview
The LM158QT is a low-power dual operational amplifier produced by STMicroelectronics. It consists of two independent, high-gain, internally frequency-compensated op amps designed to operate from a single power supply over a wide range of voltages. This design allows for operation in single power supply systems, making it suitable for various applications such as transducer amplifiers, DC gain blocks, and conventional op amp circuits. The LM158QT can be directly supplied with standard logic system voltages, such as 5 V, without the need for additional power supplies.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3 | - | 30 | V |
| Operating Temperature Range | -55 | - | 125 | °C |
| DC Voltage Gain | - | - | 100 dB | - |
| Bandwidth (Unity Gain) | - | - | 1.1 MHz | - |
| Input Bias Current | - | 20 | 50 | nA |
| Input Offset Voltage | - | 2 | 7 | mV |
| Input Offset Current | - | 2 | 30 | nA |
| Supply Current per Channel | - | 0.7 | 1.2 | mA |
| Output Voltage Swing | 0 | - | VCC+ - 1.5 V | V |
| Common Mode Rejection Ratio | 60 | - | 85 | dB |
Key Features
- Frequency compensation implemented internally
- Large DC voltage gain: 100 dB
- Wide bandwidth (unity gain): 1.1 MHz (temperature compensated)
- Very low supply current per channel essentially independent of supply voltage
- Low input bias current: 20 nA (temperature compensated)
- Low input offset voltage: 2 mV
- Low input offset current: 2 nA
- Input common-mode voltage range includes negative rails
- Differential input voltage range equal to the power supply voltage
- Large output voltage swing: 0 V to (VCC+ - 1.5 V)
Applications
The LM158QT is versatile and can be used in various applications, including:
- Transducer amplifiers
- DC gain blocks
- Conventional op amp circuits in single power supply systems
- Interface electronics in logic systems
- AC-coupled inverting and non-inverting amplifiers
- DC summing amplifiers
- High input impedance DC differential amplifiers
- Active band-pass filters
Q & A
- What is the operating temperature range of the LM158QT?
The operating temperature range of the LM158QT is from -55°C to 125°C.
- What is the typical supply current per channel for the LM158QT?
The typical supply current per channel is 0.7 mA.
- What is the input bias current of the LM158QT?
The input bias current is typically 20 nA.
- Can the LM158QT operate from a single power supply?
- What is the common mode rejection ratio of the LM158QT?
The common mode rejection ratio is between 60 dB and 85 dB.
- What are some typical applications of the LM158QT?
Typical applications include transducer amplifiers, DC gain blocks, and conventional op amp circuits in single power supply systems.
- What is the output voltage swing of the LM158QT?
The output voltage swing is from 0 V to (VCC+ - 1.5 V).
- Is the LM158QT suitable for use in logic systems?
- What is the bandwidth (unity gain) of the LM158QT?
The bandwidth (unity gain) is 1.1 MHz.
- Does the LM158QT have internal frequency compensation?
