Overview
The LF347BDR, produced by Texas Instruments, is a low-cost, high-speed, JFET-input quad operational amplifier. This device is part of the LF347 and LF347B series, characterized by their low input bias and offset currents, low supply current, and high slew rate. Each amplifier in the LF347BDR features JFET inputs for high input impedance and bipolar output stages integrated on a single monolithic chip. This makes the device suitable for a wide range of applications requiring high-speed and low-noise performance.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Input Bias Current | 50 pA | pA |
| Input Noise Current | 0.01 pA/√Hz | pA/√Hz |
| Supply Current | 8 mA | mA |
| Gain Bandwidth | 3 MHz | MHz |
| Slew Rate | 13 V/μs | V/μs |
| Input Offset Voltage | 5 mV | mV |
| Common-Mode Rejection Ratio (CMRR) | 70 dB | dB |
| Supply-Voltage Rejection Ratio (kSVR) | 70 dB | dB |
| Maximum Peak Output Voltage Swing | ±12 V (RL = 10 kΩ) | V |
| Operating Temperature Range | 0°C to 70°C | °C |
| Package Type | SOIC (14-pin) |
Key Features
- Low Input Bias Current: 50 pA typical, making it suitable for high-impedance circuits.
- Low Input Noise Current: 0.01 pA/√Hz typical, ensuring low noise performance.
- High Slew Rate: 13 V/μs typical, allowing for fast response times.
- Low Supply Current: 8 mA typical, making it energy-efficient.
- High Gain Bandwidth: 3 MHz typical, suitable for high-speed applications.
- High Common-Mode Rejection Ratio (CMRR):
- 70 dB, ensuring good rejection of common-mode signals.
- Output Protection: The output is protected against shorts due to the resistive 200-Ω output impedance.
Applications
- Motor Integrated Systems: UPS, drives, and control solutions.
- Renewables: Solar inverters.
- Pro Audio Mixers: High-quality audio signal processing.
- Oscilloscopes: High-speed measurement and display of electrical signals.
- High-Speed Integrators, Digital-to-Analog Converters, and Sample-and-Hold Circuits: Various analog and mixed-signal applications.
Q & A
- What is the typical input bias current of the LF347BDR?
The typical input bias current is 50 pA.
- What is the slew rate of the LF347BDR?
The slew rate is 13 V/μs typical.
- What is the gain bandwidth of the LF347BDR?
The gain bandwidth is 3 MHz typical.
- What is the operating temperature range of the LF347BDR?
The operating temperature range is 0°C to 70°C.
- What type of package does the LF347BDR come in?
The LF347BDR comes in a 14-pin SOIC package.
- Is the LF347BDR suitable for high-speed applications?
Yes, it is suitable for high-speed applications due to its high slew rate and gain bandwidth.
- What is the common-mode rejection ratio (CMRR) of the LF347BDR?
The CMRR is 70 dB.
- How many independent amplifiers does the LF347BDR have?
The LF347BDR has four independent amplifiers.
- What is the typical supply current of the LF347BDR?
The typical supply current is 8 mA.
- Is the output of the LF347BDR protected against shorts?
Yes, the output is protected against shorts due to the resistive 200-Ω output impedance.
