Overview
The AD8512ARZ is a dual-channel precision JFET operational amplifier produced by Analog Devices Inc. This amplifier is renowned for its low offset voltage, low input bias current, and low input voltage noise, making it highly suitable for a variety of precision applications. The AD8512ARZ is part of the AD8510/AD8512/AD8513 family, which includes single-, dual-, and quad-channel configurations. The combination of DC precision, low noise, and fast settling time makes this amplifier ideal for use in medical instruments, electronic measurement, automated test equipment, and high-performance filters.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Offset Voltage | Vs = ±15 V | - | 0.9 | 1.0 | mV |
| Offset Voltage Drift | - | - | 1.7 | - | μV/°C |
| Input Bias Current | Vs = ±15 V | - | 25 | - | pA |
| Input Voltage Noise | f = 1 kHz | - | 8.0 | - | nV/√Hz |
| Slew Rate | RL = 2 kΩ | - | 20 | - | V/μs |
| Gain Bandwidth Product | - | - | 8 | - | MHz |
| Settling Time | 0 V to 4 V step, G = +1 | - | 0.4 | - | μs (to 0.1%) |
| Supply Current/Amplifier | Vs = ±15 V | - | 2.0 | 2.3 | mA |
| Operating Temperature Range | - | -40 | - | 125 | °C |
| Package Style | - | - | - | 8-lead SOIC-N | - |
Key Features
- Low Offset Voltage and Drift: Maximum offset voltage of 1.0 mV and a typical drift of 1.7 μV/°C, ensuring high precision over temperature variations.
- Low Input Bias Current: Typical input bias current of 25 pA at ±15 V supply, making it suitable for high impedance sensor amplification and precise current measurements.
- Low Noise: Input voltage noise of 8.0 nV/√Hz at 1 kHz, contributing to a wide dynamic range in photodiode amplifier circuits.
- Fast Settling Time: Settling time of 0.4 μs to 0.1% for a 0 V to 4 V step, G = +1, which is crucial for fast and accurate measurements.
- No Phase Reversal: Does not suffer from output phase reversal when input voltages exceed the maximum common-mode voltage range, enhancing stability.
- Dual-Supply Operation: Operates over a supply range of ±5 V to ±15 V, providing flexibility in various applications.
- High Output Current and Low Distortion: High output current and low distortion (0.0005% at 1 kHz), making it suitable for audio applications and other high-performance needs.
Applications
- Instrumentation: Ideal for precision measurement instruments due to its low noise and high accuracy.
- Multipole Filters: Suitable for high-performance filters due to its stability with capacitive loads and fast settling time.
- Precision Current Measurement: Used in precise current measurements using shunts due to its low input bias current and high precision.
- Photodiode Amplifiers: Wide dynamic range makes it suitable for photodiode amplifier circuits.
- Medical Instruments and Automated Test Equipment: Superior accuracy in medical instruments and automated test equipment due to its DC precision, low noise, and fast settling time.
- Audio Applications: High output current and low distortion make it a great choice for audio applications.
- Military and Aerospace: The AD8512-EP version supports defense and aerospace applications with a military temperature range and controlled manufacturing baseline.
Q & A
- What is the typical offset voltage of the AD8512ARZ?
The typical offset voltage of the AD8512ARZ is 0.9 mV at ±15 V supply.
- What is the input bias current of the AD8512ARZ?
The typical input bias current is 25 pA at ±15 V supply.
- What is the slew rate of the AD8512ARZ?
The slew rate is 20 V/μs at RL = 2 kΩ.
- What is the gain bandwidth product of the AD8512ARZ?
The gain bandwidth product is 8 MHz.
- What is the settling time of the AD8512ARZ 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, G = +1.
- Does the AD8512ARZ suffer from output phase reversal?
No, the AD8512ARZ does not suffer from output phase reversal when input voltages exceed the maximum common-mode voltage range.
- What is the operating temperature range of the AD8512ARZ?
The operating temperature range is −40°C to +125°C.
- What are the typical applications of the AD8512ARZ?
Typical applications include instrumentation, multipole filters, precision current measurement, photodiode amplifiers, and audio applications.
- Is the AD8512ARZ suitable for military and aerospace applications?
Yes, the AD8512-EP version is specifically designed to support defense and aerospace applications with a military temperature range and controlled manufacturing baseline.
- What is the package style of the AD8512ARZ?
The AD8512ARZ is available in an 8-lead narrow SOIC-N package.
