Overview
The AD8604DRUZ, produced by Analog Devices Inc., is a quad rail-to-rail input and output, single-supply operational amplifier. This amplifier is part of the AD8601, AD8602, and AD8604 family, which are known for their very low offset voltage and wide signal bandwidth. The AD8604 uses a patented trimming technique to achieve superior performance without the need for laser trimming. It is fully specified to operate on a single supply voltage ranging from 2.7 V to 5.5 V, making it versatile for various applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage (AD8604) | VOS | 0 V ≤ VCM ≤ 1.3 V, -40°C ≤ TA ≤ +85°C | 80 | 600 | 1100 | µV |
| Offset Voltage (AD8604) | VOS | 0 V ≤ VCM ≤ 1.3 V, -40°C ≤ TA ≤ +125°C | 80 | 600 | 1600 | µV |
| Input Bias Current | IB | -40°C ≤ TA ≤ +85°C | 0.2 | 60 | 200 | pA |
| Slew Rate | SR | RL = 2 kΩ | 5.2 | 5.2 | - | V/µs |
| Gain Bandwidth Product | GBP | - | 8.4 | 8.4 | - | MHz |
| Supply Current/Amplifier | ISY | VO = 0 V, -40°C ≤ TA ≤ +125°C | 680 | 1000 | 1300 | µA |
| Output Voltage Low | VOL | IL = 1.0 mA, -40°C ≤ TA ≤ +125°C | 20 | 35 | 50 | mV |
| Output Current | IOUT | - | ±30 | ±30 | - | mA |
Key Features
- Rail-to-Rail Input and Output: The AD8604 operates with rail-to-rail input and output, allowing it to handle signals that range from the negative to the positive supply rail.
- Low Offset Voltage: The amplifier features very low offset voltage, with a maximum of 1100 µV, ensuring high precision in signal amplification.
- Low Input Bias Currents: The input bias currents are very low, typically 60 pA, which is beneficial for high impedance sensors and other sensitive applications.
- High Speed: The AD8604 has a slew rate of 5.2 V/µs and a gain bandwidth product of 8.4 MHz, making it suitable for high-speed applications.
- Low Distortion: The amplifier exhibits low distortion, which is crucial for audio and other AC applications.
- Single-Supply Operation: It operates on a single supply voltage from 2.7 V to 5.5 V, making it versatile for battery-powered and other single-supply systems.
- Unity-Gain Stable: The AD8604 is unity-gain stable, ensuring stability in a variety of configurations.
Applications
- Current Sensing: Ideal for current sensing applications due to its low offset voltage and high precision.
- Barcode Scanners: Used in barcode scanners for signal amplification and processing.
- PA Controls: Suitable for power amplifier controls where precision and high speed are required.
- Battery-Powered Instrumentation: Perfect for battery-powered devices due to its low power consumption.
- Multipole Filters: Used in filter circuits to provide precise signal processing.
- Sensors and ASICs: Employed in sensor and ASIC applications where low input bias currents and high precision are necessary.
- Audio: Utilized in audio applications due to its wide bandwidth and low distortion.
Q & A
- What is the typical offset voltage of the AD8604?
The typical offset voltage of the AD8604 is 600 µV for VCM between 0 V and 1.3 V.
- What is the slew rate of the AD8604?
The slew rate of the AD8604 is 5.2 V/µs.
- What is the gain bandwidth product of the AD8604?
The gain bandwidth product of the AD8604 is 8.4 MHz.
- What is the supply current per amplifier for the AD8604?
The supply current per amplifier for the AD8604 is typically 1000 µA at VO = 0 V.
- What is the output current capability of the AD8604?
The AD8604 can deliver an output current of ±30 mA.
- What are the common applications of the AD8604?
The AD8604 is commonly used in current sensing, barcode scanners, PA controls, battery-powered instrumentation, multipole filters, sensors, ASICs, and audio applications.
- What is the operating supply voltage range for the AD8604?
The AD8604 operates on a single supply voltage ranging from 2.7 V to 5.5 V.
- Is the AD8604 unity-gain stable?
Yes, the AD8604 is unity-gain stable).
- What is the input bias current of the AD8604?
The input bias current of the AD8604 is typically 60 pA).
- What is the common-mode rejection ratio (CMRR) of the AD8604?
The CMRR of the AD8604 is typically 89 dB for VCM between 0 V and 5 V).
