Overview
The LF347D is a JFET-input quad operational amplifier produced by Texas Instruments. It is known for its low-cost, high-speed performance, and low supply current. This device features four independent operational amplifiers, each with JFET inputs and bipolar output stages integrated on a single monolithic chip. The LF347D is characterized by its low input bias and offset currents, high slew rate, and large gain-bandwidth product, making it suitable for a variety of high-speed applications.
Key Specifications
| Parameter | Typical | Minimum | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage | - | -18 | 18 | V |
| Input Bias Current | 50 pA | 25 pA | 200 pA | pA |
| Input Offset Voltage | 5 mV | - | 10 mV | mV |
| Gain Bandwidth | 3 MHz | - | - | MHz |
| Slew Rate | 13 V/μs | 8 V/μs | - | V/μs |
| Supply Current | 8 mA | - | 11 mA | mA |
| Common-Mode Rejection Ratio (CMRR) | 70 dB | - | 100 dB | dB |
| Operating Temperature Range | - | 0°C | 70°C | °C |
Key Features
- Low input bias current: 50 pA typical
- Low input noise current: 0.01 pA/√Hz typical
- Low total harmonic distortion
- Low supply current: 8 mA typical
- High slew rate: 13 V/μs typical
- Large gain-bandwidth product: 3 MHz typical
- High input impedance due to JFET inputs
- Output protected against shorts with 200-Ω output impedance
Applications
- Motor integrated systems: UPS, drives, and control solutions
- Renewables: Solar inverters
- Pro audio mixers
- Oscilloscopes
- High-speed integrators, digital-to-analog converters, and sample-and-hold circuits
Q & A
- What is the typical input bias current of the LF347D?
The typical input bias current of the LF347D is 50 pA.
- What is the gain-bandwidth product of the LF347D?
The gain-bandwidth product of the LF347D is 3 MHz typical.
- What is the slew rate of the LF347D?
The slew rate of the LF347D is 13 V/μs typical.
- What is the operating temperature range of the LF347D?
The operating temperature range of the LF347D is from 0°C to 70°C.
- What are the common applications of the LF347D?
The LF347D is commonly used in motor integrated systems, renewables, pro audio mixers, oscilloscopes, and other high-speed applications.
- What is the typical supply current of the LF347D?
The typical supply current of the LF347D is 8 mA.
- Does the LF347D have output protection against shorts?
- What type of inputs does the LF347D have?
The LF347D has JFET inputs, which provide high input impedance.
- Can the LF347D be used in single-supply or dual-supply configurations?
- What is the common-mode rejection ratio (CMRR) of the LF347D?
The CMRR of the LF347D is typically 70 dB.
