Overview
The LF347DR, produced by Texas Instruments, is a low-cost, high-speed, JFET-input operational amplifier. This quad operational amplifier is characterized by its low input bias and offset currents, as well as its fast slew rate. The device is part of the LF347 series, which is known for its high input impedance and bipolar output stages integrated on a single monolithic chip. The LF347DR is suitable for a wide range of applications requiring high-speed and low-power consumption.
Key Specifications
| Parameter | Conditions | Typical Value | Units |
|---|---|---|---|
| Input Bias Current | - | 50 pA | pA |
| Input Noise Current | - | 0.01 pA/√Hz | pA/√Hz |
| Supply Current | - | 8 mA | mA |
| Gain Bandwidth Product | - | 3 MHz | MHz |
| Slew Rate | VS = ±15V, TA = 25°C | 13 V/μs | V/μs |
| Supply Voltage Range | - | ±3.5V to ±18V | V |
| Operating Temperature Range | - | 0°C to 70°C | °C |
| Package Type | - | SOIC-14 | - |
| Number of Amplifiers | - | 4 | - |
| Input Offset Voltage | RS = 10 kΩ, TA = 25°C | 5 mV | mV |
Key Features
- Low Input Bias Current: Typical value of 50 pA, ensuring minimal current draw from the input signal.
- Low Input Noise Current: Typical value of 0.01 pA/√Hz, contributing to low noise performance.
- High Slew Rate: 13 V/μs, allowing for fast response times in high-speed applications.
- Low Supply Current: Typical value of 8 mA, making it suitable for low-power applications.
- High Gain Bandwidth Product: 3 MHz, enabling high-frequency operation.
- High Input Impedance: JFET inputs provide high input impedance, reducing the load on the input signal.
- Output Protection: Outputs are protected against shorts due to the resistive 200-Ω output impedance.
Applications
- Motor Integrated Systems: Suitable for UPS drives and control solutions.
- AC Inverters and VF Drives: Used in various motor control and drive systems.
- Solar Inverters: Applicable in renewable energy systems.
- Pro Audio Mixers: Used in professional audio equipment due to its low noise and high slew rate.
- Oscilloscopes: Utilized in measurement and testing equipment.
- High-Speed Integrators, Digital-to-Analog Converters, and Sample-and-Hold Circuits: Suitable for a variety of high-speed analog circuits.
Q & A
- What is the typical input bias current of the LF347DR?
The typical input bias current is 50 pA.
- What is the slew rate of the LF347DR?
The slew rate is 13 V/μs.
- What is the gain bandwidth product of the LF347DR?
The gain bandwidth product is 3 MHz.
- What is the supply voltage range for the LF347DR?
The supply voltage range is ±3.5V to ±18V.
- What is the operating temperature range for the LF347DR?
The operating temperature range is 0°C to 70°C.
- How many amplifiers are in the LF347DR package?
The LF347DR contains 4 amplifiers.
- What is the typical input offset voltage of the LF347DR?
The typical input offset voltage is 5 mV.
- Is the LF347DR RoHS compliant?
Yes, the LF347DR is RoHS compliant.
- What type of package does the LF347DR come in?
The LF347DR comes in a SOIC-14 package.
- Can the outputs of the LF347DR be shorted to ground?
Yes, but only one output should be shorted to ground at a time to avoid exceeding the maximum junction temperature.
