Overview
The OP285GS-REEL, produced by Analog Devices Inc., is a precision high-speed operational amplifier featuring the Butler Amplifier front-end. This design combines the accuracy and low noise performance of bipolar transistors with the speed of JFETs, resulting in an amplifier with high slew rates, low offset voltage, and good noise performance at low supply currents. The OP285 is particularly useful in dc-coupled or summing applications due to its laser-trimmed input offset voltage of less than 250 μV. It is specified over the extended industrial temperature range of −40°C to +85°C and is available in an 8-lead SOIC_N surface mount package.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Offset Voltage | VOS | TA = 25°C | 35 | - | 250 | μV |
| Input Bias Current | IB | VCM = 0 V, TA = 25°C | 100 | - | 350 | nA |
| Input Offset Current | IOS | VCM = 0 V, TA = 25°C | ±2 | - | ±50 | nA |
| Common-Mode Rejection Ratio | CMRR | VCM = ±10.5 V, −40°C ≤ TA ≤ +85°C | 80 | - | 106 | dB |
| Gain Bandwidth Product | GBP | - | - | - | 9 | MHz |
| Slew Rate | SR | - | - | - | 22 | V/μs |
| Supply Voltage | VS | - | ±4.5 | - | ±22 | V |
| Supply Current | IS | VO = 0 V, −40°C ≤ TA ≤ +85°C | - | - | 4 | mA |
| Operating Temperature Range | - | - | -40 | - | 85 | °C |
| Package | - | - | - | - | 8-SOIC | - |
Key Features
- High Slew Rate and Bandwidth: The OP285 features a slew rate of 22 V/μs and a gain bandwidth product of 9 MHz, making it suitable for high-speed applications.
- Low Noise and Offset Voltage: The amplifier has a low input offset voltage of less than 250 μV and low noise performance, which is beneficial for precision applications.
- Low Power Consumption: The OP285 operates with a supply current of 4 mA, making it efficient for power-restricted applications.
- Wide Operating Temperature Range: Specified over the extended industrial temperature range of −40°C to +85°C, ensuring reliability in various environmental conditions.
- Lead-Free and RoHS Compliant: The OP285GS-REEL is lead-free and RoHS compliant, meeting modern environmental standards.
Applications
- Instrumentation Amplifiers: The OP285 is suitable for building high-speed instrumentation systems due to its precision, low noise, and high slew rate.
- Ramp Generators and Bi-Quad Filters: Its high speed and accuracy make it ideal for circuits such as ramp generators and bi-quad filters.
- Dc-Coupled Audio Systems: The low offset voltage and noise performance make it useful in dc-coupled audio systems.
- Active Filters and Fast Amplifiers: The OP285 can be used in active filters and fast amplifier circuits due to its high slew rate and bandwidth.
Q & A
- What is the input offset voltage of the OP285?
The input offset voltage of the OP285 is less than 250 μV.
- What is the slew rate of the OP285?
The slew rate of the OP285 is 22 V/μs.
- What is the gain bandwidth product of the OP285?
The gain bandwidth product of the OP285 is 9 MHz.
- What is the operating temperature range of the OP285?
The OP285 operates over the extended industrial temperature range of −40°C to +85°C.
- What type of package is the OP285GS-REEL available in?
The OP285GS-REEL is available in an 8-lead SOIC_N surface mount package.
- Is the OP285GS-REEL lead-free and RoHS compliant?
Yes, the OP285GS-REEL is lead-free and RoHS compliant.
- What is the supply current of the OP285?
The supply current of the OP285 is 4 mA.
- What are some common applications of the OP285?
The OP285 is commonly used in instrumentation amplifiers, ramp generators, bi-quad filters, and dc-coupled audio systems.
- What is the common-mode rejection ratio (CMRR) of the OP285?
The CMRR of the OP285 is 80 to 106 dB over the temperature range of −40°C to +85°C.
- What is the input bias current of the OP285?
The input bias current of the OP285 is typically 100 nA to 350 nA at VCM = 0 V.
