Overview
The OPA124UAG4 is a precision monolithic FET operational amplifier produced by Texas Instruments, formerly Burr-Brown Corporation. This device utilizes a Difet (dielectrical isolation) manufacturing process, which ensures outstanding DC and AC performance characteristics. The OPA124UAG4 is particularly suited for critical instrumentation applications due to its superior bias current, noise, voltage offset, drift, open-loop gain, and common-mode rejection compared to BIFET and CMOS amplifiers.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Noise Voltage | fO = 10kHz | 6 | 6 | 6 | nV/√Hz |
| Input Bias Current | VCM = 0VDC | ±1 | ±5 | ±0.5 | pA |
| Input Offset Voltage | 250 | µV | |||
| Input Offset Drift | 2 | µV/°C | |||
| Open-Loop Gain, DC | RL ≥ 2kΩ | 120 | 125 | dB | |
| Common-Mode Rejection | VIN = ±10VDC | 100 | 110 | dB | |
| Unity Gain Bandwidth | 1.5 | MHz | |||
| Slew Rate | VO = ±10V, RL = 2kΩ | V/µs | |||
| Quiescent Current | IO = 0mA | 2.5 | 3.5 | mA | |
| Operating Temperature Range | –25 | +85 | °C |
Key Features
- Low noise: 6nV/√Hz at 10kHz
- Low input bias current: 1pA max
- Low offset voltage: 250µV max
- Low drift: 2µV/°C max
- High open-loop gain: 120dB min
- High common-mode rejection: 100dB min
- Available in 8-pin plastic DIP and 8-pin SOIC packages
- Laser-trimmed thin-film resistors for low offset and drift
- Unique cascode circuitry for high precision input specifications and reduced susceptibility to flicker noise
Applications
- Precision photodiode preamplifiers
- Medical equipment
- Optoelectronics
- Data acquisition systems
- Test equipment
Q & A
- What is the typical input noise voltage of the OPA124UAG4 at 10kHz?
The typical input noise voltage is 6nV/√Hz at 10kHz.
- What is the maximum input bias current of the OPA124UAG4?
The maximum input bias current is 1pA.
- What is the maximum input offset voltage of the OPA124UAG4?
The maximum input offset voltage is 250µV.
- What is the typical open-loop gain of the OPA124UAG4?
The typical open-loop gain is 125dB.
- What is the common-mode rejection ratio (CMRR) of the OPA124UAG4?
The CMRR is 100dB min.
- In what packages is the OPA124UAG4 available?
The OPA124UAG4 is available in 8-pin plastic DIP and 8-pin SOIC packages.
- What are some typical applications of the OPA124UAG4?
Typical applications include precision photodiode preamplifiers, medical equipment, optoelectronics, data acquisition systems, and test equipment.
- How does the OPA124UAG4 achieve low offset and drift?
The OPA124UAG4 achieves low offset and drift through laser-trimmed thin-film resistors.
- What is the operating temperature range of the OPA124UAG4?
The operating temperature range is –25°C to +85°C.
- What is the quiescent current of the OPA124UAG4?
The quiescent current is 2.5mA to 3.5mA.
