Overview
The AD8544AR, produced by Analog Devices Inc., is a quad rail-to-rail input and output, single-supply operational amplifier. This device is part of the AD8541/AD8542/AD8544 family, which features very low supply current and a wide bandwidth of 1 MHz. The AD8544AR is designed to operate from a single supply voltage ranging from 2.7 V to 5.5 V, making it suitable for a variety of applications, including battery-powered systems. The amplifier is known for its low input bias currents, unity gain stability, and rail-to-rail input and output capabilities, which are beneficial for applications requiring high source impedance and low power consumption.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | V_S | 2.7 | 5.5 | V | ||
| Supply Current per Amplifier | I_SY | VO = 0 V | 40 | 60 | 75 | µA |
| Bandwidth | 1 | MHz | ||||
| Offset Voltage | V_OS | −40°C ≤ TA ≤ +125°C | 1 | 6 | 7 | mV |
| Input Bias Current | I_B | −40°C ≤ TA ≤ +125°C | 4 | 60 | 1000 | pA |
| Slew Rate | S_R | RL = 100 kΩ | 0.4 | 0.8 | V/µs | |
| Settling Time | t_S | To 0.01% (1 V step) | 5 | µs | ||
| Gain Bandwidth Product | GBP | 980 | kHz | |||
| Phase Margin | Φ_M | 64 | Degrees | |||
| Voltage Noise Density | e_n | f = 1 kHz | 42 | nV/√Hz | ||
| Current Noise Density | i_n | < 0.1 | pA/√Hz |
Key Features
- Single-supply operation: 2.7 V to 5.5 V
- Low supply current: 45 µA per amplifier
- Wide bandwidth: 1 MHz
- No phase reversal
- Low input currents: 4 pA
- Unity gain stable
- Rail-to-rail input and output
- AEC-Q100 qualified for automotive applications
- Extended industrial temperature range: –40°C to +125°C
Applications
- ASIC input or output amplifiers
- Sensor interfaces
- Piezoelectric transducer amplifiers
- Medical instrumentation
- Mobile communications
- Audio outputs
- Portable systems
- Active filters and gain stages
Q & A
- What is the supply voltage range for the AD8544AR?
The AD8544AR 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 AD8544AR?
The typical supply current per amplifier is 45 µA.
- What is the bandwidth of the AD8544AR?
The bandwidth of the AD8544AR is 1 MHz.
- Does the AD8544AR have phase reversal?
No, the AD8544AR does not have phase reversal.
- What are the typical input bias currents for the AD8544AR?
The typical input bias currents are 4 pA.
- Is the AD8544AR unity gain stable?
- What is the temperature range for the AD8544AR?
The AD8544AR is specified over the extended industrial temperature range of –40°C to +125°C.
- What are some common applications for the AD8544AR?
Common applications include ASIC input or output amplifiers, sensor interfaces, piezoelectric transducer amplifiers, medical instrumentation, mobile communications, audio outputs, and portable systems.
- Is the AD8544AR AEC-Q100 qualified?
- What are the available packages for the AD8544AR?
The AD8544AR is available in 14-lead narrow SO-14 and 14-lead TSSOP surface mount packages.
