Overview
The AD8505ARJZ-R7 is a single-channel, rail-to-rail input/output operational amplifier produced by Analog Devices Inc. This device is part of the AD8505/AD8506/AD8508 series, known for their zero crossover distortion and optimized performance in current consumption, power supply rejection ratio (PSRR), and common-mode rejection ratio (CMRR). The AD8505ARJZ-R7 is designed to address key challenges in low-voltage battery-powered applications, such as battery voltage decrease over time and rail-to-rail input stage distortion.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VSY | - | - | - | 5.5 | V |
| Input Voltage | - | ±VSY ± 0.1 V | - | - | - | V |
| Offset Voltage | VOS | 0 V ≤ VCM ≤ 5 V | 0.5 | 2.5 | 3.5 | mV |
| Input Bias Current | IB | -40°C ≤ TA ≤ +125°C | - | - | 25 | µA |
| Supply Current per Amplifier | ISY | VOUT = VSY/2, -40°C ≤ TA ≤ +125°C | 16.5 | - | 24 | µA |
| Slew Rate | SR | RL = 100 kΩ, CL = 10 pF, G = 1 | - | - | 13 | mV/µs |
| Gain Bandwidth Product | GBP | RL = 1 MΩ, CL = 20 pF, G = 1 | - | - | 95 | kHz |
| Phase Margin | ΦM | RL = 1 MΩ, CL = 20 pF, G = 1 | - | - | 60 | Degrees |
| Voltage Noise (Peak-to-Peak) | en | f = 0.1 Hz to 10 Hz | - | - | 2.8 | µV p-p |
| Voltage Noise Density | en | f = 1 kHz | - | - | 45 | nV/√Hz |
Key Features
- Rail-to-Rail Input and Output: The AD8505ARJZ-R7 features rail-to-rail input and output stages, allowing it to operate effectively in low-voltage applications.
- Zero Crossover Distortion: Designed to eliminate crossover distortion, making it suitable for applications requiring high fidelity and low distortion.
- High PSRR and CMRR: Offers a high power supply rejection ratio (PSRR) of 100 dB minimum and a common-mode rejection ratio (CMRR) of 105 dB typical, ensuring robust performance against noise and common-mode signals.
- Low Supply Current: Consumes a very low supply current of 20 µA per amplifier maximum, making it ideal for battery-powered devices.
- Wide Operating Voltage Range: Can operate on a single supply from 1.8 V to 5 V or dual supplies from ±0.9 V to ±2.5 V.
- Low Noise Performance: Features a low peak-to-peak voltage noise of 2.8 µV from 0.1 Hz to 10 Hz and a voltage noise density of 45 nV/√Hz at 1 kHz.
Applications
- Battery-Powered Devices: Ideal for low-voltage battery-powered applications where battery voltage decreases over time.
- Portable Electronics: Suitable for use in portable electronics such as handheld devices, medical equipment, and consumer electronics.
- Audio and Signal Processing: Used in audio and signal processing applications requiring low distortion and high fidelity.
- Industrial Control Systems: Can be used in industrial control systems where low noise and high accuracy are required.
Q & A
- What is the typical offset voltage of the AD8505ARJZ-R7?
The typical offset voltage is 2.5 mV, with a maximum of 3.5 mV over the temperature range of -40°C to +125°C.
- What is the power supply rejection ratio (PSRR) of the AD8505ARJZ-R7?
The PSRR is 100 dB minimum.
- What is the common-mode rejection ratio (CMRR) of the AD8505ARJZ-R7?
The CMRR is 105 dB typical.
- What is the slew rate of the AD8505ARJZ-R7?
The slew rate is 13 mV/µs with RL = 100 kΩ, CL = 10 pF, and G = 1.
- What is the gain bandwidth product (GBP) of the AD8505ARJZ-R7?
The GBP is 95 kHz with RL = 1 MΩ, CL = 20 pF, and G = 1.
- What is the phase margin of the AD8505ARJZ-R7?
The phase margin is 60 degrees with RL = 1 MΩ, CL = 20 pF, and G = 1.
- What is the voltage noise density of the AD8505ARJZ-R7 at 1 kHz?
The voltage noise density is 45 nV/√Hz at 1 kHz.
- What is the maximum supply current per amplifier for the AD8505ARJZ-R7?
The maximum supply current per amplifier is 24 µA.
- What are the typical operating voltage ranges for the AD8505ARJZ-R7?
The device can operate on a single supply from 1.8 V to 5 V or dual supplies from ±0.9 V to ±2.5 V.
- In what types of applications is the AD8505ARJZ-R7 commonly used?
The AD8505ARJZ-R7 is commonly used in battery-powered devices, portable electronics, audio and signal processing, and industrial control systems.
