Overview
The OP295GS-REEL, produced by Analog Devices Inc., is a dual CBCMOS operational amplifier known for its high accuracy and versatility. This device combines rail-to-rail output swing with DC accuracy, making it suitable for a wide range of applications. The OP295 uses a bipolar front end to achieve lower noise and higher accuracy compared to traditional CMOS designs. It is particularly useful in systems requiring high precision, even in single-supply configurations, and is compatible with 3 V operation, making it ideal for battery-operated devices such as those using lithium batteries.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | VS = 5 V | - | - | 300 μV | μV |
| Gain Bandwidth Product | - | - | - | - | 75 kHz | kHz |
| Open-Loop Gain | AVO | RL = 10 kΩ | 1000 | - | 4000 | V/mV |
| Supply Current per Amplifier | ISY | VOUT = 1.5 V, RL = ∞, −40°C ≤ TA ≤ +125°C | - | - | 150 μA | μA |
| Input Offset Current | IOS | VCM = 0 V, −40°C ≤ TA ≤ +125°C | - | - | ±5 nA | nA |
| Common-Mode Rejection Ratio | CMRR | −15.0 V ≤ VCM ≤ +13.5 V, −40°C ≤ TA ≤ +125°C | 90 | - | 110 dB | dB |
| Output Voltage Swing High | VOH | RL = 10 kΩ to GND | - | - | 2.9 V | V |
| Output Voltage Swing Low | VOL | RL = 10 kΩ to GND | - | - | 0.7 mV | mV |
Key Features
- Rail-to-Rail Output Swing: The OP295 can swing its output from the negative supply to within about 800 mV of the positive supply, ensuring high accuracy in single-supply designs.
- Low Offset Voltage: With a maximum offset voltage of 300 μV, this amplifier is suitable for high-precision applications.
- High Open-Loop Gain: The amplifier has a minimum open-loop gain of 1000 V/mV, ensuring high accuracy in various configurations.
- Low Supply Current: Each amplifier consumes a maximum of 150 μA, making it energy-efficient for battery-operated devices.
- Stability with Capacitive Loads: The OP295 is stable with loads in excess of 300 pF, which is beneficial for driving coax cable or large FET transistors.
Applications
- Battery-Operated Instrumentation: Ideal for devices powered by lithium batteries or other low-voltage sources.
- Servo Amplifiers and Actuator Drives: The high accuracy and rail-to-rail output make it suitable for servo and actuator applications.
- Sensor Conditioners: Used to condition signals from sensors in various measurement systems.
- Power Supply Control: Can be used to control and regulate power supplies efficiently.
- Transformer and Inductive Load Driving: Efficient for driving inductive loads such as transformers, enhancing overall system efficiency.
Q & A
- What is the maximum offset voltage of the OP295?
The maximum offset voltage of the OP295 is 300 μV for 5 V operation.
- What is the gain bandwidth product of the OP295?
The gain bandwidth product of the OP295 is 75 kHz.
- How much current does each amplifier in the OP295 consume?
Each amplifier in the OP295 consumes a maximum of 150 μA.
- Is the OP295 stable with capacitive loads?
Yes, the OP295 is stable with loads in excess of 300 pF.
- What are some common applications of the OP295?
The OP295 is commonly used in battery-operated instrumentation, servo amplifiers, actuator drives, sensor conditioners, and power supply control.
- Can the OP295 be used in single-supply designs?
Yes, the OP295 is suitable for single-supply designs and can operate from 3 V to 15 V supplies.
- How does the OP295 handle high input common-mode voltages?
The OP295 can handle high input common-mode voltages but requires a minimal amount of gain to maintain linearity above the common-mode input range.
- Can the OP295 be used to drive inductive loads?
Yes, the OP295 is efficient for driving inductive loads such as transformers, enhancing overall system efficiency.
- What is the output voltage swing of the OP295?
The output voltage swing of the OP295 extends from the negative supply to within about 800 mV of the positive supply.
- Is the OP295 suitable for low-voltage systems?
Yes, the OP295 is specified for 3 V operation, making it suitable for low-voltage systems such as those using lithium batteries.
