Overview
The AD8513ARU from Analog Devices Inc. is a quad-precision JFET operational amplifier, renowned for its exceptional performance in low noise, low input bias current, and low input voltage noise. This amplifier is part of the AD8510/AD8512/AD8513 family, which includes single, dual, and quad configurations. The AD8513ARU is particularly suited for applications requiring high precision and low noise, such as instrumentation, multi-pole filters, precision current measurements, and photodiode amplifiers.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | -40°C < TA < +125°C | 0.4 | - | 0.8 | mV |
| Input Bias Current (IB) | - | - | 30 | pA | |
| Supply Current per Amplifier (ISY) | VO = 0V, -40°C < TA < +125°C | 2.0 | - | 3.0 | mA |
| Slew Rate (SR) | RL = 2 kΩ | - | 20 | - | V/μs |
| Gain Bandwidth Product (GBP) | - | - | 8 | MHz | |
| Settling Time (ts) to 0.01% | 0V to 10V step, G = +1 | - | 0.9 | μs | |
| Voltage Noise Density (en) | f = 1 kHz | - | 8 | nV/√Hz | |
| Package Type | - | - | TSSOP-14 | - | |
| Operating Temperature Range | - | -40°C | - | +125°C | °C |
Key Features
- Low Noise and Offset: The AD8513ARU features low input offset voltage (typically 0.4 mV) and low input voltage noise (8 nV/√Hz at 1 kHz), making it ideal for high-precision applications.
- Low Input Bias Current: With an input bias current of 30 pA, this amplifier is suitable for high impedance sensor amplification and precise current measurements.
- Fast Settling Time: The amplifier has a fast settling time of 0.9 μs to 0.01% for a 0V to 10V step, ensuring rapid response in dynamic applications.
- High Stability with Capacitive Loads: Unlike many older JFET amplifiers, the AD8513ARU does not suffer from output phase reversal and maintains stability with substantial capacitive loads.
- Wide Operating Temperature Range: Specified over the extended industrial temperature range of -40°C to +125°C.
- Multiple Package Options: Available in 14-lead TSSOP and narrow SOIC packages, with TSSOP versions available in tape and reel.
Applications
- Instrumentation: Ideal for precision instrumentation due to its low noise and offset characteristics.
- Multi-pole Filters: Suitable for high-performance filter applications due to its stability with capacitive loads.
- Precision Current Measurements: Used in precise current measurements using shunts due to its low input bias current.
- Photodiode Amplifiers: Excellent for photodiode amplifier circuits requiring low noise and low input bias currents.
- Audio Applications: Its low noise and distortion, along with high output current, make it a great choice for audio applications.
- Medical Instruments and Automated Test Equipment: The combination of dc precision, low noise, and fast settling time makes it superior in these fields.
Q & A
- Q: What is the input offset voltage of the AD8513ARU?
A: The input offset voltage of the AD8513ARU is typically 0.4 mV over the temperature range of -40°C to +125°C.
- Q: What is the input bias current of the AD8513ARU?
A: The input bias current of the AD8513ARU is typically 30 pA.
- Q: What is the slew rate of the AD8513ARU?
A: The slew rate of the AD8513ARU is 20 V/μs with a load resistance of 2 kΩ.
- Q: What is the gain bandwidth product of the AD8513ARU?
A: The gain bandwidth product of the AD8513ARU is 8 MHz.
- Q: What is the operating temperature range of the AD8513ARU?
A: The AD8513ARU operates over the extended industrial temperature range of -40°C to +125°C.
- Q: Does the AD8513ARU suffer from output phase reversal?
A: No, the AD8513ARU does not suffer from output phase reversal when input voltages exceed the maximum common-mode voltage range.
- Q: What are the typical applications of the AD8513ARU?
A: The AD8513ARU is typically used in instrumentation, multi-pole filters, precision current measurements, photodiode amplifiers, and audio applications.
- Q: What package options are available for the AD8513ARU?
A: The AD8513ARU is available in 14-lead TSSOP and narrow SOIC packages, with TSSOP versions available in tape and reel.
- Q: What is the voltage noise density of the AD8513ARU?
A: The voltage noise density of the AD8513ARU is 8 nV/√Hz at 1 kHz.
- Q: How does the AD8513ARU perform with capacitive loads?
A: The AD8513ARU maintains its fast settling performance and stability even with substantial capacitive loads.
