Overview
The AD8512BR, produced by Analog Devices Inc., is a dual precision JFET operational amplifier known for its exceptional signal integrity and frequency response. This amplifier is part of the AD8510/AD8512/AD8513 family, which features low offset voltage, low input bias current, and low noise, making it highly suitable for various precision applications. The AD8512BR is particularly useful in high impedance sensor amplification, precise current measurements using shunts, and in medical instruments, electronic measurement, and automated test equipment due to its dc precision, low noise, and fast settling time.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Number of Channels | - | - | - | 2 | - | - |
| Input Offset Voltage | VOS | -40°C < TA < +125°C | 0.08 mV | 0.4 mV | 0.8 mV | mV |
| Input Bias Current | IB | -40°C < TA < +85°C | 21 pA | 75 pA | 0.7 nA | pA/nA |
| Input Offset Current | IOS | -40°C < TA < +85°C | 5 pA | 50 pA | 0.3 nA | pA/nA |
| Gain Bandwidth Product | GBP | - | - | 8 MHz | - | MHz |
| Slew Rate | SR | RL = 2 kΩ | - | 20 V/μs | - | V/μs |
| Supply Voltage Range | - | - | ±4.5 V | - | ±18 V | V |
| Supply Current per Amplifier | ISY | VO = 0 V | 2.0 mA | 2.3 mA | 2.6 mA | mA |
| Operating Temperature Range | - | - | -40°C | - | +125°C | °C |
| Package Type | - | - | - | SOIC-8 | - | - |
Key Features
- Low Offset Voltage and Input Bias Current: The AD8512BR features low offset voltage (typically 0.4 mV) and very low input bias currents (typically 75 pA), making it ideal for precision applications.
- Low Noise: It has low input voltage noise density (34 nV/√Hz), which is crucial for high sensitivity and accuracy in various measurement systems.
- High Gain Bandwidth Product and Slew Rate: With a gain bandwidth product of 8 MHz and a slew rate of 20 V/μs, this amplifier is suitable for high-frequency applications and fast signal processing.
- High Common-Mode Rejection Ratio (CMRR): The AD8512BR has a high CMRR of 86 dB to 108 dB, ensuring good rejection of common-mode signals.
- Wide Operating Temperature Range: It operates over an extended industrial temperature range of -40°C to +125°C, making it reliable in diverse environmental conditions.
- Stability with Capacitive Loads: The amplifier maintains its performance even with substantial capacitive loads, which is beneficial for applications requiring high stability.
Applications
- High Impedance Sensor Amplification: The low input bias current and low noise make the AD8512BR suitable for amplifying signals from high impedance sensors.
- Precise Current Measurements: It is used in precise current measurements using shunts due to its low offset voltage and low noise characteristics.
- Medical Instruments and Electronic Measurement: The combination of dc precision, low noise, and fast settling time makes it superior in medical instruments and electronic measurement applications.
- Automated Test Equipment: Its fast settling performance and stability with capacitive loads are beneficial in automated test equipment.
- Audio Applications: The low noise and distortion, along with high output current and excellent speed, make it a great choice for audio applications.
- High Performance Filters: The fast slew rate and stability with capacitive loads make it a perfect fit for high performance filters.
Q & A
- What is the typical input offset voltage of the AD8512BR?
The typical input offset voltage of the AD8512BR is 0.4 mV.
- What is the input bias current of the AD8512BR?
The input bias current is typically 75 pA.
- What is the gain bandwidth product of the AD8512BR?
The gain bandwidth product is 8 MHz.
- What is the slew rate of the AD8512BR?
The slew rate is 20 V/μs.
- What is the operating temperature range of the AD8512BR?
The operating temperature range is -40°C to +125°C.
- What package type is the AD8512BR available in?
The AD8512BR is available in an SOIC-8 package.
- What are some typical applications of the AD8512BR?
Typical applications include high impedance sensor amplification, precise current measurements, medical instruments, electronic measurement, automated test equipment, audio applications, and high performance filters.
- Does the AD8512BR have a shutdown feature?
No, the AD8512BR does not have a shutdown feature.[
- What is the power supply rejection ratio (PSRR) of the AD8512BR?
The PSRR is typically 86 dB to 130 dB.[
- What is the maximum output current of the AD8512BR?
The maximum output current is ±70 mA.[
