Overview
The LF247DT is a high-speed J–FET input quad operational amplifier manufactured by STMicroelectronics. This device is part of the LF147, LF247, and LF347 family, which are known for their wide bandwidth and low power consumption. The LF247DT incorporates well-matched, high-voltage J–FET and bipolar transistors in a monolithic integrated circuit, making it suitable for a variety of applications requiring high performance and reliability.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | -18 | - | 18 | V |
| Input Voltage (Vi) | -15 | - | 15 | V |
| Differential Input Voltage (Vid) | -30 | - | 30 | V |
| Power Dissipation (Ptot) | - | - | 680 | mW |
| Operating Temperature Range (Toper) | -40 | - | 105 | °C |
| Input Offset Voltage (Vio) | 3 | 10 | 13 | mV |
| Input Offset Current (Iio) | 5 | 100 | 200 | pA |
| Input Bias Current (Iib) | 20 | 200 | 200 | pA |
| Large Signal Voltage Gain (Avd) | 50 | 200 | - | V/mV |
| Supply Voltage Rejection Ratio (SVR) | 80 | 86 | - | dB |
| Common Mode Rejection Ratio (CMR) | 70 | 86 | - | dB |
| Output Short-Circuit Current (IOS) | 10 | 40 | - | mA |
| Output Voltage Swing | 10 | 13.5 | - | V |
| Slew Rate (SR) | 12 | 16 | - | V/µs |
| Rise Time (tr) | - | 0.1 | - | µs |
| Gain Bandwidth Product (GBP) | 2.5 | 4 | - | MHz |
| Input Resistance (Ri) | - | 10^12 | - | Ω |
| Total Harmonic Distortion (THD) | - | 0.01 | - | % |
Key Features
- High Speed J–FET Input: The LF247DT features high-speed J–FET input stages, providing high input impedance and low input bias and offset currents.
- Low Power Consumption: The device is designed for low power consumption, making it suitable for battery-powered and energy-efficient applications.
- Wide Common-Mode and Differential Voltage Range: It supports a wide range of common-mode and differential input voltages, up to the supply voltage limits.
- Output Short-Circuit Protection: The amplifier includes output short-circuit protection to ensure reliability in adverse conditions.
- High Slew Rate: With a typical slew rate of 16 V/µs, the LF247DT is capable of handling high-frequency signals efficiently.
- Internal Frequency Compensation: The device is internally frequency compensated, simplifying circuit design and ensuring stable operation.
- Latch-Up Free Operation: The LF247DT is designed to be latch-up free, enhancing its reliability in complex circuits.
Applications
- Audio Amplifiers: Suitable for audio distribution amplifiers and other audio applications due to its low distortion and high fidelity.
- Filter Circuits: Can be used in various filter configurations such as bandpass filters, low-pass filters, and high-pass filters.
- Instrumentation Amplifiers: Ideal for instrumentation applications requiring high input impedance and low noise.
- General Purpose Amplification: Applicable in a wide range of general-purpose amplification tasks where high speed and low power consumption are required.
- Industrial Control Systems: Used in industrial control systems for signal conditioning and amplification.
Q & A
- What is the operating supply voltage range of the LF247DT?
The LF247DT operates within a supply voltage range of 2.7V to 36V.
- What is the typical slew rate of the LF247DT?
The typical slew rate of the LF247DT is 16 V/µs.
- Does the LF247DT have output short-circuit protection?
- What is the input offset voltage of the LF247DT?
The input offset voltage of the LF247DT is typically 10 mV.
- What are the common package types available for the LF247DT?
The LF247DT is available in Dual In Line Package (DIP) and Small Outline Package (SO), also available in Tape & Reel (DT).
- What is the gain bandwidth product of the LF247DT?
The gain bandwidth product of the LF247DT is typically 4 MHz.
- Is the LF247DT suitable for audio applications?
- What is the common mode rejection ratio of the LF247DT?
The common mode rejection ratio of the LF247DT is typically 86 dB).
- Does the LF247DT have internal frequency compensation?
- What is the operating temperature range of the LF247DT?
