Overview
The AD8646ARZ from Analog Devices Inc. is a dual-channel, rail-to-rail, single-supply operational amplifier. It is designed to offer high performance with low offset voltage, wide signal bandwidth, and low noise. This amplifier is suitable for a variety of applications due to its combination of low input bias current, high output drive capability, and wide bandwidth.
The AD8646ARZ operates over a single supply voltage range of 2.7V to 5.5V and is available in an 8-pin SOIC package. It is qualified for automotive applications and features a shutdown option in some variants, making it versatile for different use cases.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VS | 2.7 | 5.5 | V | ||
| Input Offset Voltage | VOS | VCM = 0 V to 5 V | 0.6 | 2.5 | 3.2 | mV |
| Input Bias Current | IB | 0.3 | 1 | 550 | pA | |
| Common Mode Rejection Ratio | CMRR | VCM = 0 V to 5 V | 67 | 84 | dB | |
| Power Supply Rejection Ratio | PSRR | VS = 2.7 V to 5.5 V | 63 | 80 | dB | |
| Supply Current per Amplifier | ISY | 1.6 | 2.0 | 2.5 | mA | |
| Slew Rate | SR | RL = 2 kΩ | 11 | V/μs | ||
| Gain Bandwidth Product | GBP | 24 | MHz | |||
| Output Current per Channel | 120 | mA | ||||
| Operating Temperature | -40 | 125 | °C |
Key Features
- Rail-to-Rail Input and Output: The AD8646ARZ offers rail-to-rail input and output capabilities, ensuring full signal range utilization.
- Low Offset Voltage: With a maximum offset voltage of 2.5 mV, this amplifier provides high accuracy in signal amplification.
- Low Noise: The amplifier features an input voltage noise density of 8 nV/√Hz, making it suitable for noise-sensitive applications.
- Wide Bandwidth: A gain bandwidth product of 24 MHz and a slew rate of 11 V/μs enable the amplifier to handle high-frequency signals effectively.
- High Output Drive Capability: The AD8646ARZ can drive up to 120 mA per channel, making it suitable for low impedance applications such as audio line drivers.
- Single-Supply Operation: The amplifier operates on a single supply voltage from 2.7V to 5.5V, simplifying power supply design.
- Automotive Qualification: The AD8646ARZ is qualified for automotive applications, ensuring reliability in harsh environments.
Applications
- Semiconductor Detectors: Used in detecting and amplifying signals from semiconductor devices.
- Active Probes: Employed in active probe circuits for precise signal measurement.
- Instrumentation: Suitable for various instrumentation applications requiring high accuracy and low noise.
- Communication Devices: Used in communication equipment for signal amplification and processing.
- Voltage Regulation Circuits: Applied in voltage regulation circuits to maintain stable output voltages.
- ECG Equipment: Used in electrocardiogram equipment for amplifying bio-signals.
- Strain Gauges: Employed in strain gauge circuits for measuring mechanical stress.
- Television Broadcasting Equipment: Used in TV broadcasting equipment for signal processing and amplification.
Q & A
- What is the supply voltage range of the AD8646ARZ?
The AD8646ARZ operates on a single supply voltage from 2.7V to 5.5V.
- What is the maximum input offset voltage of the AD8646ARZ?
The maximum input offset voltage is 2.5 mV.
- What is the common mode rejection ratio (CMRR) of the AD8646ARZ?
The CMRR is 84 dB.
- What is the gain bandwidth product (GBP) of the AD8646ARZ?
The GBP is 24 MHz.
- What is the slew rate of the AD8646ARZ?
The slew rate is 11 V/μs.
- What is the maximum output current per channel of the AD8646ARZ?
The maximum output current per channel is 120 mA.
- Is the AD8646ARZ qualified for automotive applications?
Yes, the AD8646ARZ is qualified for automotive applications.
- What is the input bias current of the AD8646ARZ?
The input bias current is 0.3 pA to 1 pA.
- What is the power supply rejection ratio (PSRR) of the AD8646ARZ?
The PSRR is 80 dB.
- In what package is the AD8646ARZ available?
The AD8646ARZ is available in an 8-pin SOIC package.
