Overview
The OP495GSZ is a quad rail-to-rail operational amplifier produced by Analog Devices Inc. It is part of the OP495 series, which also includes the dual version, OP295. These amplifiers are known for their high dc accuracy and rail-to-rail output swing, making them suitable for a wide range of applications. The OP495GSZ uses a bipolar front end, which provides lower noise and higher accuracy compared to CMOS designs. This amplifier is designed for single-supply operation from 3 V to 36 V, making it versatile for various power supply configurations.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | VS = 5 V | - | - | 300 μV | μV |
| Offset Voltage Drift (TCVOS) | VS = 5 V, -40°C ≤ TA ≤ +85°C | - | - | 1 μV/°C | μV/°C |
| Gain Bandwidth Product | - | - | - | 75 kHz | kHz |
| Open-Loop Gain | - | - | - | 1000 V/mV | V/mV |
| Supply Current per Amplifier (ISY) | VOUT = 1.5 V, RL = ∞, -40°C ≤ TA ≤ +125°C | - | - | 150 μA | μA |
| Output Voltage Swing High (VOH) | RL = 10 kΩ to GND | - | - | 2.9 V | V |
| Output Voltage Swing Low (VOL) | RL = 10 kΩ to GND | - | - | 2 mV | mV |
| Power Supply Rejection Ratio (PSRR) | ±1.5 V ≤ VS ≤ ±15 V | 85 | 90 | 110 | dB |
| Package | - | - | - | 16-SOIC | - |
Key Features
- Rail-to-Rail Output Swing: The OP495GSZ can swing its output from the negative supply to within about 800 mV of the positive supply, allowing for zero-in/zero-out capability.
- Single-Supply Operation: Operates from a single supply of 3 V to 36 V, making it suitable for various power supply configurations.
- Low Offset Voltage: Maximum offset voltage is specified at 300 μV for 5 V operation, ensuring high accuracy.
- High Open-Loop Gain: Minimum open-loop gain of 1000 V/mV, which is beneficial for implementing high accuracy systems.
- Low Supply Current: Each amplifier draws a maximum of 150 μA, making it power-efficient.
- Stability with Capacitive Loads: Stable with loads in excess of 300 pF, useful for driving coax cable or large FET transistors.
Applications
- Battery-Operated Instrumentation: Suitable for battery-powered systems due to its low supply current and single-supply operation.
- Servo Amplifiers and Actuator Drives: Ideal for driving power transistors and H bridges, enhancing efficiency and power transfer.
- Sensor Conditioners: Used in sensor conditioning due to its high accuracy and rail-to-rail output swing.
- Power Supply Control: Can be used in power supply control circuits to maintain high accuracy and stability.
- Transformer and Inductive Load Driving: Efficient in driving inductive loads, such as transformers, and improving overall system efficiency.
Q & A
- What is the input offset voltage of the OP495GSZ?
The maximum input offset voltage is specified at 300 μV for 5 V operation.
- What is the gain bandwidth product of the OP495GSZ?
The gain bandwidth product is 75 kHz.
- What is the open-loop gain of the OP495GSZ?
The minimum open-loop gain is 1000 V/mV.
- What is the supply current per amplifier for the OP495GSZ?
Each amplifier draws a maximum of 150 μA.
- What is the output voltage swing range of the OP495GSZ?
The output voltage swing extends from the negative supply to within about 800 mV of the positive supply.
- Is the OP495GSZ stable with capacitive loads?
Yes, it is stable with loads in excess of 300 pF.
- What are the typical applications of the OP495GSZ?
Typical applications include battery-operated instrumentation, servo amplifiers, actuator drives, sensor conditioners, and power supply control.
- What is the package type of the OP495GSZ?
The OP495GSZ comes in a 16-SOIC package.
- What is the operating temperature range of the OP495GSZ?
The operating temperature range is -40°C to +125°C.
- Can the OP495GSZ be used in single-supply configurations?
Yes, it can operate from a single supply of 3 V to 36 V.
