Overview
The AD8512BRZ-REEL, produced by Analog Devices Inc., is a precision JFET operational amplifier known for its high accuracy and low noise characteristics. This single-channel amplifier is particularly suited for applications requiring low offset voltage, low input bias current, and fast settling times. It is widely used in various fields such as medical instruments, electronic measurement, automated test equipment, and audio applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Offset Voltage | VOS | - | 0.1 | 0.9 | 1.8 | mV |
| Input Bias Current | IB | - | 21 | 75 | 7.5 | pA |
| Input Offset Current | IOS | - | 5 | 50 | 0.5 | pA |
| Input Capacitance (Differential) | - | - | - | 12.5 | - | pF |
| Input Voltage Range | - | - | -2.0 | - | +2.5 | V |
| Common-Mode Rejection Ratio | CMRR | VCM = -2.0 V to +2.5 V | 86 | - | 100 | dB |
| Output Voltage High | VOH | RL = 600 Ω | 3.7 | - | 4.1 | V |
| Output Voltage Low | VOL | RL = 600 Ω | -4.8 | - | -4.2 | V |
| Output Current | IOUT | - | ±40 | - | ±54 | mA |
| Power Supply Rejection Ratio | PSRR | VS = ±4.5 V to ±18 V | 86 | - | 130 | dB |
| Supply Current/Amplifier | ISY | VO = 0 V | 2.0 | - | 2.3 | mA |
| Slew Rate | SR | RL = 2 kΩ | - | 20 | - | V/μs |
| Gain Bandwidth Product | GBP | - | - | 8 | - | MHz |
| Settling Time (to 0.1%) | tS | 0 V to 4 V step, G = +1 | - | 0.4 | - | μs |
| Total Harmonic Distortion + Noise | THD + N | 1 kHz, G = +1, RL = 2 kΩ | - | 0.0005 | - | % |
| Phase Margin | φM | - | - | 44.5 | - | Degrees |
| Voltage Noise Density | en | f = 1 kHz | - | 8.0 | - | nV/√Hz |
Key Features
- Low Offset Voltage: Maximum offset voltage of 0.9 mV, making it suitable for precise applications.
- Low Input Bias Current: Typical input bias current of 25 pA, ideal for high impedance sensor amplification.
- Fast Settling Time: Settling time of 0.4 μs to 0.1% for a 0 V to 4 V step, ensuring rapid response times.
- Low Noise: Voltage noise density of 8 nV/√Hz at 1 kHz, contributing to a wide dynamic range in photodiode amplifier circuits.
- High Output Current: Output current of ±40 mA to ±54 mA, supporting high current requirements.
- High Slew Rate: Slew rate of 20 V/μs, ensuring excellent speed and stability with capacitive loads.
- No Phase Reversal: Maintains stability without output phase reversal when input voltages exceed the maximum common-mode voltage range.
- Dual-Supply Operation: Operates with supply voltages from ±5 V to ±15 V.
- Wide Operating Temperature Range: Specified over the -40°C to +125°C extended industrial temperature range.
Applications
- Medical Instruments: Superior accuracy in medical devices due to its dc precision, low noise, and fast settling time.
- Electronic Measurement: Ideal for precise current measurements using shunts and high impedance sensor amplification.
- Automated Test Equipment: Used in automated test equipment for its high accuracy and reliability.
- Audio Applications: Low noise and distortion, high output current, and excellent speed make it suitable for audio applications.
- Photodiode Amplifiers: Wide dynamic range and low noise make it a great choice for photodiode amplifier circuits.
- Sensors and Multipole Filters: Used in various sensor applications and high-performance filters.
Q & A
- What is the typical input bias current of the AD8512BRZ?
The typical input bias current is 25 pA.
- What is the settling time of the AD8512BRZ for a 0 V to 4 V step?
The settling time to 0.1% is 0.4 μs for a 0 V to 4 V step.
- What is the slew rate of the AD8512BRZ?
The slew rate is 20 V/μs.
- What is the operating temperature range of the AD8512BRZ?
The operating temperature range is -40°C to +125°C.
- Does the AD8512BRZ suffer from output phase reversal?
No, it does not suffer from output phase reversal when input voltages exceed the maximum common-mode voltage range.
- What is the typical voltage noise density of the AD8512BRZ at 1 kHz?
The typical voltage noise density is 8 nV/√Hz at 1 kHz.
- What are the typical supply voltages for the AD8512BRZ?
The AD8512BRZ operates with supply voltages from ±5 V to ±15 V.
- What is the maximum output current of the AD8512BRZ?
The maximum output current is ±54 mA.
- What is the gain bandwidth product of the AD8512BRZ?
The gain bandwidth product is 8 MHz.
- What are some common applications of the AD8512BRZ?
Common applications include medical instruments, electronic measurement, automated test equipment, audio applications, photodiode amplifiers, and sensors.
