Overview
The AD8648ARUZ, produced by Analog Devices Inc., is a quad, rail-to-rail, input and output, single-supply operational amplifier. This device is part of the AD8646/AD8647/AD8648 family, which is known for its low offset voltage, wide signal bandwidth, and low noise characteristics. The AD8648 is particularly useful in applications requiring multiple amplifiers due to its quad configuration, making it suitable for a variety of analog signal processing tasks.
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 | - | 0.3 | 1 | 550 | pA |
| Input Offset Current | IOS | - | 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 |
| Large Signal Voltage Gain | AVO | RL = 2 kΩ, VO = 0.5 V to 4.5 V | 104 | 116 | - | dB |
| Voltage Noise Density | en | f = 1 kHz | - | 8 | - | nV/√Hz |
| Bandwidth | - | - | - | 24 | - | MHz |
| Slew Rate | - | - | - | 11 | - | V/μs |
| Short-Circuit Output Current | - | - | - | 120 | - | mA |
Key Features
- Low offset voltage: Maximum of 2.5 mV, ensuring high precision in signal amplification.
- Single-supply operation: Compatible with supply voltages from 2.7 V to 5.5 V.
- Low noise: Voltage noise density of 8 nV/√Hz at 1 kHz.
- Wide bandwidth: 24 MHz, suitable for high-frequency applications.
- High slew rate: 11 V/μs, enabling fast signal transitions.
- High output drive capability: Short-circuit output current of 120 mA, ideal for low impedance applications.
- No phase reversal: Ensures stable operation without phase inversion.
- Qualified for automotive applications: Meets the stringent requirements of automotive environments.
- Low power shutdown function (AD8647): Allows for power conservation in idle states.
Applications
- Filters and integrators: Benefiting from the low offset and wide bandwidth.
- Photodiode amplifiers: Suitable due to low noise and high input impedance.
- High impedance sensors: Leveraging the low input bias current and high CMRR.
- Audio line drivers: High output drive capability makes it excellent for low impedance applications.
- Automotive systems: Qualified for use in automotive environments.
Q & A
- What is the maximum offset voltage of the AD8648?
The maximum offset voltage of the AD8648 is 2.5 mV. - What is the operating voltage range for the AD8648?
The AD8648 operates on a single supply from 2.7 V to 5.5 V. - What is the bandwidth of the AD8648?
The bandwidth of the AD8648 is 24 MHz. - What is the slew rate of the AD8648?
The slew rate of the AD8648 is 11 V/μs. - Does the AD8648 have a shutdown function?
No, the AD8648 does not have a shutdown function, but the AD8647 does. - What is the short-circuit output current of the AD8648?
The short-circuit output current of the AD8648 is 120 mA. - Is the AD8648 suitable for automotive applications?
Yes, the AD8648 is qualified for automotive applications. - What is the common-mode rejection ratio (CMRR) of the AD8648?
The CMRR of the AD8648 is typically 84 dB. - What is the voltage noise density of the AD8648?
The voltage noise density of the AD8648 is 8 nV/√Hz at 1 kHz. - How many amplifiers are in the AD8648 package?
The AD8648 is a quad operational amplifier.
