Overview
The LF412CDR, produced by Texas Instruments, is a low-cost, high-speed, dual JFET-input operational amplifier. It is characterized by its very low input offset voltage and a specified maximum input offset voltage drift. This device is designed to operate with low supply current while maintaining a large gain bandwidth product and a fast slew rate. The LF412CDR is suitable for a variety of high-speed applications due to its high input impedance, low input bias and offset currents, and wide common-mode input voltage range.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage, VCC+ | 3.5 | 18 | V | ||
| Supply Voltage, VCC- | -18 | -3.5 | V | ||
| Input Offset Voltage (VIO) | VIC = 0, RS = 10 kΩ, 25°C | 1 | 3 | mV | |
| Input Bias Current (IIB) | VIC = 0, 25°C | 50 | 200 | pA | |
| Input Noise Current | f = 1 kHz | 0.01 | pA/√Hz | ||
| Supply Current (ICC) | 4.5 | 6.8 | mA | ||
| Slew Rate (SR) | 8 | 13 | V/µs | ||
| Unity-Gain Bandwidth (B1) | 2.7 | 3 | MHz | ||
| Common-Mode Input Voltage Range (VICR) | -11.5 to 14.5 | V | |||
| Operating Temperature Range | 0 | 70 | °C |
Key Features
- Low input offset voltage and specified maximum input offset voltage drift.
- High input impedance (typically 10^12 Ω).
- Low input bias and offset currents (typically 50 pA and 25 pA, respectively).
- Wide common-mode input voltage range (±11.5 to 14.5 V).
- High slew rate (typically 13 V/µs).
- Large gain bandwidth product (typically 3 MHz).
- Low supply current (typically 4.5 mA).
- High common-mode rejection ratio (typically 70 dB) and supply-voltage rejection ratio (typically 70 dB).
Applications
The LF412CDR is versatile and can be used in various high-speed applications, including:
- High-speed integrators.
- Digital-to-analog converters.
- Sample-and-hold circuits.
- Other high-speed analog circuits.
Q & A
- What is the typical input offset voltage of the LF412CDR?
The typical input offset voltage is 3 mV at 25°C.
- What is the slew rate of the LF412CDR?
The slew rate is typically 13 V/µs.
- What is the unity-gain bandwidth of the LF412CDR?
The unity-gain bandwidth is typically 3 MHz.
- What is the operating temperature range of the LF412CDR?
The operating temperature range is from 0°C to 70°C.
- What are the typical input bias and offset currents of the LF412CDR?
The typical input bias current is 50 pA, and the typical input offset current is 25 pA at 25°C.
- What is the common-mode input voltage range of the LF412CDR?
The common-mode input voltage range is ±11.5 to 14.5 V.
- What are the supply voltage limits for the LF412CDR?
The supply voltage limits are from 3.5 V to 18 V for VCC+ and from -3.5 V to -18 V for VCC-.
- What is the typical supply current of the LF412CDR?
The typical supply current is 4.5 mA.
- What are some common applications of the LF412CDR?
Common applications include high-speed integrators, digital-to-analog converters, sample-and-hold circuits, and other high-speed analog circuits.
- What package options are available for the LF412CDR?
The LF412CDR is available in SOIC-8 and PDIP-8 packages.
