Overview
The ADA4691-4ACPZ-R7 is a low-power, low-noise, rail-to-rail output operational amplifier produced by Analog Devices Inc. This device is part of the ADA4691 family and is known for its high performance and versatility in various analog signal processing applications. It features four operational amplifiers in a single 16-lead LFCSP package, making it suitable for space-constrained designs. The ADA4691-4 is designed to operate over a wide supply voltage range from 2.7V to 5.5V, with a low quiescent current of 165µA to 200µA per amplifier, depending on the operating conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 2.7 | - | 5.5 | V |
| Quiescent Current per Amplifier | 165 | - | 200 | µA |
| Input Offset Voltage (VOS) | - | 2.5 | - | mV |
| Common Mode Rejection Ratio (CMRR) | 75 | 98 | - | dB |
| Power Supply Rejection Ratio (PSRR) | 80 | 90 | - | dB |
| Slew Rate | - | 1.1 | - | V/µs |
| Output Voltage High (VOH) @ RL = 2kΩ | 2.65 | 2.67 | - | V |
| Output Voltage Low (VOL) @ RL = 2kΩ | 24 | 33 | - | mV |
| Short-Circuit Current (ISC) | - | ±15 | - | mA |
| Operating Temperature Range | -40 | - | 125 | °C |
Key Features
- Low Power Consumption: The ADA4691-4 operates with a low quiescent current of 165µA to 200µA per amplifier, making it suitable for battery-powered devices and power-sensitive applications.
- Low Noise: The device features low input voltage noise density of 16nV/√Hz, which is crucial for high-precision analog signal processing.
- Rail-to-Rail Output: The operational amplifier provides rail-to-rail output, allowing the output voltage to swing close to the supply rails, which is beneficial for maximizing dynamic range in applications.
- High CMRR and PSRR: With a common-mode rejection ratio (CMRR) of up to 98 dB and a power supply rejection ratio (PSRR) of up to 90 dB, the ADA4691-4 ensures high immunity to common-mode and power supply noise.
- Compact Package: The device is available in a 16-lead LFCSP package, which is ideal for space-constrained designs.
Applications
- Audio and Video Equipment: The ADA4691-4 is suitable for audio and video signal processing due to its low noise and high CMRR and PSRR.
- Medical Devices: Its low power consumption and high precision make it a good fit for medical devices such as ECG and EEG systems.
- Industrial Automation: The device can be used in various industrial automation applications requiring high accuracy and reliability.
- Portable Electronics: The rail-to-rail output and low power consumption make it ideal for battery-powered portable electronics.
Q & A
- What is the supply voltage range for the ADA4691-4?
The ADA4691-4 operates over a supply voltage range from 2.7V to 5.5V.
- What is the quiescent current per amplifier for the ADA4691-4?
The quiescent current per amplifier is between 165µA and 200µA.
- What is the input offset voltage (VOS) for the ADA4691-4?
The typical input offset voltage (VOS) is 2.5mV.
- What is the common-mode rejection ratio (CMRR) of the ADA4691-4?
The CMRR is up to 98 dB.
- What is the power supply rejection ratio (PSRR) of the ADA4691-4?
The PSRR is up to 90 dB.
- What is the slew rate of the ADA4691-4?
The slew rate is approximately 1.1 V/µs.[
- What is the operating temperature range for the ADA4691-4?
The operating temperature range is from -40°C to +125°C.
- What package type is the ADA4691-4 available in?
The ADA4691-4 is available in a 16-lead LFCSP package.
- Is the ADA4691-4 RoHS compliant?
Yes, the ADA4691-4 is RoHS3 compliant.[
- What are some typical applications for the ADA4691-4?
Typical applications include audio and video equipment, medical devices, industrial automation, and portable electronics.[
