Overview
The AD8648ARZ is a quad, rail-to-rail, input and output, single-supply operational amplifier produced by Analog Devices Inc. This amplifier is part of the AD8646/AD8647/AD8648 family, known for its low offset voltage, wide signal bandwidth, and low noise characteristics. The AD8648 is particularly suited for applications requiring multiple channels with high performance and reliability.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | VCM = 0 V to 5 V | 0.6 | 2.5 | 3.2 | mV |
| Offset Voltage Drift | ΔVOS/ΔT | −40°C < TA < +125°C | 1.8 | 7.5 | μV/°C | |
| Input Bias Current | IB | −40°C < TA < +125°C | 0.3 | 1 | 550 | pA |
| Input Offset Current | IOS | −40°C < TA < +125°C | 0.1 | 0.5 | 250 | pA |
| Input Voltage Range | VCM | 0 | 5 | V | ||
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 5 V | 67 | 84 | dB | |
| Bandwidth | 24 | MHz | ||||
| Slew Rate | 11 | V/μs | ||||
| Short-Circuit Output Current | 120 | mA | ||||
| Supply Voltage Range | VSY | 2.7 | 5.5 | V | ||
| Noise Density | en | f = 1 kHz | 8 | nV/√Hz |
Key Features
- Low Offset Voltage: Maximum offset voltage of 2.5 mV, ensuring high accuracy in signal processing.
- Single-Supply Operation: Operates from a single supply voltage ranging from 2.7 V to 5.5 V.
- Low Noise: Voltage noise density of 8 nV/√Hz at 1 kHz, making it suitable for low-noise applications.
- Wide Bandwidth: Bandwidth of 24 MHz, ideal for AC applications and high-speed signal processing.
- High Slew Rate: Slew rate of 11 V/μs, enabling fast response times.
- High Output Drive Capability: Short-circuit output current of 120 mA, suitable for driving low impedance loads.
- Rail-to-Rail Input and Output: Allows for full use of the supply voltage range at both input and output.
- Low Power Shutdown (AD8647 only): Option for low power shutdown, reducing power consumption when not in use.
- Automotive Qualified: Qualified for automotive applications, ensuring reliability in harsh environments.
Applications
- Filters and Integrators: The wide bandwidth and low noise make it ideal for filter and integrator circuits.
- Photodiode Amplifiers: Suitable for amplifying signals from photodiodes due to its low noise and high bandwidth.
- High Impedance Sensors: Can be used with high impedance sensors due to its low input bias current.
- Audio Line Drivers: High output drive capability makes it excellent for audio line drivers and other low impedance applications.
- Instrumentation and Measurement Systems: Precision and low offset voltage make it suitable for instrumentation and measurement applications.
Q & A
- What is the maximum offset voltage of the AD8648ARZ?
The maximum offset voltage is 2.5 mV.
- What is the supply voltage range for the AD8648ARZ?
The supply voltage range is from 2.7 V to 5.5 V.
- What is the bandwidth of the AD8648ARZ?
The bandwidth is 24 MHz.
- What is the slew rate of the AD8648ARZ?
The slew rate is 11 V/μs.
- What is the short-circuit output current of the AD8648ARZ?
The short-circuit output current is 120 mA.
- Is the AD8648ARZ qualified for automotive applications?
Yes, it is qualified for automotive applications.
- Does the AD8648ARZ have a low power shutdown option?
No, the low power shutdown option is available only on the AD8647 model.
- What is the noise density of the AD8648ARZ at 1 kHz?
The noise density is 8 nV/√Hz at 1 kHz.
- What is the common-mode rejection ratio (CMRR) of the AD8648ARZ?
The CMRR is 67 dB to 84 dB.
- How many channels does the AD8648ARZ have?
The AD8648ARZ has four channels.
