Overview
The OPA2107, produced by Texas Instruments, is a precision dual Difet® operational amplifier. It offers the benefits of low noise, low input bias current, and low drift, making it suitable for a wide range of precision and low-noise analog circuitry. The OPA2107 is fabricated on a proprietary dielectrically isolated (Difet) process, which ensures excellent DC performance and superior dynamic characteristics. This amplifier is particularly useful for upgrading designs that currently use BIFET® type amplifiers.
Key Specifications
| Parameter | Condition | Min | Max | Units | |
|---|---|---|---|---|---|
| Input Offset Voltage | VCM = 0V | 0.1 | 1 | 1 | mV |
| Average Drift Over Specified Temperature | 3 | 10 | µV/°C | ||
| Power Supply Rejection | VS = ±10 to ±18V | 80 | 96 | dB | |
| Input Bias Current | VCM = 0V | 4 | 10 | 10 | pA |
| Input Noise Voltage | f = 10kHz, RS = 0 | 8 | nV/√Hz | ||
| Supply Voltage | ±18V | ||||
| Operating Temperature | –25°C | +85°C | |||
| Output Current per Channel | 40mA | ||||
| Quiescent Current per Amplifier | < 2.5mA |
Key Features
- Very Low Noise: 8nV/√Hz at 10kHz
- Low Input Offset Voltage (VOS): 1mV max
- Low Drift: 10µV/°C max
- Low Input Bias Current (IB): 10pA max
- Fast Settling Time: 2µs to 0.01%
- Unity-Gain Stable
Applications
- Data Acquisition
- DAC Output Amplifiers
- Optoelectronics
- High-Impedance Sensor Amplifiers
- High-Performance Audio Circuitry
- Medical Equipment, CT Scanners
Q & A
- What is the input offset voltage of the OPA2107?
The input offset voltage of the OPA2107 is 1mV max at VCM = 0V.
- What is the typical noise level of the OPA2107 at 10kHz?
The OPA2107 has a very low noise level of 8nV/√Hz at 10kHz.
- What is the maximum input bias current of the OPA2107?
The maximum input bias current of the OPA2107 is 10pA.
- What is the settling time of the OPA2107 to 0.01%?
The settling time of the OPA2107 to 0.01% is 2µs.
- Is the OPA2107 unity-gain stable?
Yes, the OPA2107 is unity-gain stable.
- What are the typical operating supply current and output current per channel of the OPA2107?
The OPA2107 has a quiescent current of less than 2.5mA per amplifier and an output current per channel of 40mA.
- What are the package options available for the OPA2107?
The OPA2107 is available in DIP-8 and SO-8 packages.
- What is the maximum supply voltage for the OPA2107?
The maximum supply voltage for the OPA2107 is ±18V.
- What are some common applications of the OPA2107?
The OPA2107 is commonly used in data acquisition, DAC output amplifiers, optoelectronics, high-impedance sensor amplifiers, high-performance audio circuitry, and medical equipment such as CT scanners.
- How should the power-supply connections be handled for the OPA2107?
Power-supply connections should be bypassed with capacitors positioned close to the amplifier pins. Typically, 0.1µF ceramic capacitors are adequate, but applications with larger load currents and fast transient signals may require up to 1µF tantalum bypass capacitors.
