Overview
The OP495GPZ is a quad operational amplifier from Analog Devices Inc., designed for high accuracy and versatility in various applications. It features a rail-to-rail output swing and single-supply operation, making it suitable for systems requiring high dc accuracy and low noise. The amplifier uses a bipolar front end to achieve lower noise and higher accuracy compared to CMOS designs. This makes it ideal for applications where precision and reliability are crucial.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | -40°C ≤ TA ≤ +125°C | 300 | 500 | 800 | μV |
| Input Bias Current | IB | VCM = 0 V | 7 | 20 | 30 | nA |
| Input Offset Current | IOS | VCM = 0 V | ±1 | ±3 | ±5 | nA |
| Input Voltage Range | VCM | -40°C ≤ TA ≤ +125°C | -15 | - | +13.5 | V |
| Common-Mode Rejection Ratio | CMRR | -15.0 V ≤ VCM ≤ +13.5 V | 90 | 110 | - | dB |
| Large Signal Voltage Gain | AVO | RL = 10 kΩ | 1000 | - | 4000 | V/mV |
| Output Voltage Swing High | VOH | RL = 10 kΩ to GND | 2.9 | - | - | V |
| Output Voltage Swing Low | VOL | RL = 10 kΩ to GND | 0.7 | - | 2 | mV |
| Supply Current per Amplifier | ISY | VOUT = 1.5 V, RL = ∞ | - | - | 150 | μA |
| Gain Bandwidth Product | GBP | - | - | - | 75 | kHz |
| Slew Rate | SR | RL = 10 kΩ | - | - | 0.03 | V/μs |
Key Features
- Rail-to-rail output swing, allowing the output to swing from the negative supply to within about 800 mV of the positive supply.
- Single-supply operation from 3 V to 36 V, making it suitable for battery-operated and low-voltage systems.
- Low offset voltage of 300 μV, ensuring high dc accuracy.
- High open-loop gain of 1000 V/mV and a gain bandwidth product of 75 kHz.
- Low supply current per amplifier of 150 μA maximum, contributing to low power consumption.
- Stability with capacitive loads, useful for driving coax cable or large FET transistors.
- High common-mode rejection ratio (CMRR) of 90 dB to 110 dB.
Applications
- Battery-operated instrumentation: Ideal for systems powered by lithium batteries or other low-voltage sources.
- Servo amplifiers: Provides the necessary precision and stability for servo control systems.
- Actuator drives: Suitable for driving power transistors and H bridges, enhancing efficiency and power transfer.
- Sensor conditioners: Offers high accuracy and low noise, making it suitable for conditioning sensor signals.
- Power supply control: Can be used to gain up low voltage references for high resolution ADCs.
Q & A
- What is the operating voltage range of the OP495GPZ?
The OP495GPZ operates from a single supply of 3 V to 36 V. - What is the typical offset voltage of the OP495GPZ?
The typical offset voltage is 500 μV. - What is the gain bandwidth product of the OP495GPZ?
The gain bandwidth product is 75 kHz. - Is the OP495GPZ stable with capacitive loads?
Yes, it is stable with loads in excess of 300 pF. - What is the maximum supply current per amplifier?
The maximum supply current per amplifier is 150 μA. - What are some common applications of the OP495GPZ?
Common applications include battery-operated instrumentation, servo amplifiers, actuator drives, sensor conditioners, and power supply control. - Does the OP495GPZ support rail-to-rail output swing?
Yes, it supports rail-to-rail output swing. - What is the slew rate of the OP495GPZ?
The slew rate is 0.03 V/μs. - How does the OP495GPZ handle high input common-mode range?
The amplifier must have some minimal amount of gain (at least 1.2) when rail-to-rail output swing is desired to avoid nonlinearity above the common-mode input range. - Can the OP495GPZ be used to drive inductive loads?
Yes, it can be used to drive inductive loads, such as transformers, with increased efficiency.
