Overview
The AD8544WARZ-R7 is a quad rail-to-rail input and output, single-supply operational amplifier produced by Analog Devices Inc. This component is part of the AD8541/AD8542/AD8544 family, which is designed for general-purpose applications requiring low power consumption and high performance. The AD8544 operates from a single supply voltage ranging from 2.7 V to 5.5 V, making it suitable for a variety of applications, including automotive, medical instrumentation, and mobile communications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VS | 2.7 | 5.5 | V | ||
| Offset Voltage | VOS | −40°C ≤ TA ≤ +125°C | 1 | 6 | 7 | mV |
| Input Bias Current | IB | −40°C ≤ TA ≤ +85°C | 4 | 60 | 100 | pA |
| Input Offset Current | IOS | −40°C ≤ TA ≤ +85°C | 0.1 | 30 | 50 | pA |
| Input Voltage Range | 0 | VS | V | |||
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to VS | 40 | 45 | dB | |
| Gain Bandwidth Product | GBP | 980 kHz | ||||
| Phase Margin | ΦM | 63 | ° | |||
| Supply Current/Amplifier | ISY | VO = 0 V | 40 | 60 | 75 | µA |
| Slew Rate | SR | RL = 100 kΩ | 0.4 | 0.8 | V/µs | |
| Settling Time | tS | To 0.01% (1 V step) | 5 | µs | ||
| Voltage Noise Density | en | f = 1 kHz | 40 | nV/√Hz | ||
| Current Noise Density | in | <0.1 | pA/√Hz |
Key Features
- Single-supply operation: The AD8544 operates from a single supply voltage ranging from 2.7 V to 5.5 V.
- Low supply current: Each amplifier consumes only 45 µA of supply current.
- Wide bandwidth: The amplifier features a gain bandwidth product of approximately 1 MHz.
- No phase reversal: Ensures stable operation without phase reversal.
- Low input currents: Very low input bias currents of 4 pA, making it suitable for applications requiring high input impedance.
- Unity gain stable: The amplifier is stable at unity gain.
- Rail-to-rail input and output: Allows the input and output signals to swing from the negative to the positive supply rail.
- AEC-Q100 qualified for automotive applications: Meets the stringent requirements for automotive use.
Applications
- ASIC input or output amplifiers: Suitable for use in Application-Specific Integrated Circuits (ASICs).
- Sensor interfaces: Ideal for interfacing with various sensors due to its low input bias currents.
- Piezoelectric transducer amplifiers: Used in applications involving piezoelectric transducers.
- Medical instrumentation: Applicable in medical devices requiring low power and high accuracy.
- Mobile communications: Suitable for use in mobile communication devices.
- Audio outputs: Can be used in audio output stages due to its rail-to-rail output capability.
- Portable systems: Ideal for battery-powered portable systems due to its low power consumption.
Q & A
- What is the supply voltage range for the AD8544WARZ-R7?
The AD8544WARZ-R7 operates from a single supply voltage ranging from 2.7 V to 5.5 V.
- What is the typical supply current per amplifier for the AD8544WARZ-R7?
The typical supply current per amplifier is 45 µA.
- What is the gain bandwidth product of the AD8544WARZ-R7?
The gain bandwidth product is approximately 1 MHz.
- Is the AD8544WARZ-R7 unity gain stable?
Yes, the AD8544WARZ-R7 is unity gain stable.
- What is the input bias current of the AD8544WARZ-R7?
The input bias current is typically 4 pA.
- Is the AD8544WARZ-R7 AEC-Q100 qualified?
Yes, the AD8544WARZ-R7 is AEC-Q100 qualified for automotive applications.
- What are some common applications for the AD8544WARZ-R7?
Common applications include ASIC input or output amplifiers, sensor interfaces, piezoelectric transducer amplifiers, medical instrumentation, mobile communications, audio outputs, and portable systems.
- What is the phase margin of the AD8544WARZ-R7?
The phase margin is typically over 60 degrees.
- What is the slew rate of the AD8544WARZ-R7?
The slew rate is typically 0.4 to 0.8 V/µs with a load resistance of 100 kΩ.
- What is the settling time of the AD8544WARZ-R7 to 0.01% for a 1 V step input?
The settling time is typically 5 µs.
