Overview
The AD8552ARU, produced by Analog Devices Inc., is part of a family of zero-drift, single-supply, rail-to-rail input/output operational amplifiers. This dual amplifier features ultralow offset, drift, and bias current, making it ideal for high-precision applications. The AD8552ARU operates from a single supply of 2.7 V to 5 V and is designed to provide the benefits of expensive auto-zeroing or chopper-stabilized amplifiers at a lower cost.
The amplifier uses Analog Devices' proprietary topology, combining a main amplifier and a secondary amplifier to correct the offset voltage of the main amplifier. This architecture ensures low offset voltage over a wide temperature range and throughout the operating lifetime of the device.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | –40°C ≤ TA ≤ +125°C | 1 | 5 | 10 | μV |
| Input Bias Current | IB | –40°C ≤ TA ≤ +125°C | 10 | 50 | 1.5 nA | pA |
| Input Offset Current | IOS | –40°C ≤ TA ≤ +125°C | 10 | 50 | 200 pA | pA |
| Input Voltage Range | 0 | 5 V | V | |||
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to +5 V | 115 | 130 | 130 dB | dB |
| Large Signal Voltage Gain | AVO | RL = 10 kΩ, VO = 0.3 V to 4.7 V | 120 | 135 | 135 dB | dB |
| Offset Voltage Drift | ΔVOS/ΔT | –40°C ≤ TA ≤ +125°C | 0.005 | 0.04 μV/°C | μV/°C | |
| Supply Current | 700 μA/op amp | μA | ||||
| Overload Recovery Time | 50 μs | μs |
Key Features
- Ultralow Offset Voltage: 1 μV, ensuring high accuracy in precision applications.
- Low Offset Drift: 0.005 μV/°C, maintaining stability over a wide temperature range.
- Rail-to-Rail Input and Output Swing: Allows the input common-mode voltage range to reach both supply rails and provides a wide output voltage swing.
- Low Supply Current: 700 μA per op amp, making it suitable for low-power applications.
- No External Capacitors Required: Simplifies circuit design and reduces component count.
- High Gain, CMRR, PSRR: High common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR) of up to 130 dB.
- Fast Overload Recovery Time: 50 μs, ensuring quick recovery from overload conditions.
Applications
- Temperature Sensors: Ideal for precise temperature measurements.
- Pressure Sensors: Used in applications requiring accurate pressure sensing.
- Precision Current Sensing: Suitable for high-precision current measurement applications.
- Strain Gage Amplifiers: Used in strain gage applications where high accuracy is crucial.
- Medical Instrumentation: Applied in medical devices requiring high precision and reliability.
- Thermocouple Amplifiers: Ideal for thermocouple applications due to its low offset and drift characteristics.
Q & A
- What is the typical offset voltage of the AD8552ARU?
The typical offset voltage of the AD8552ARU is 1 μV.
- What is the operating temperature range of the AD8552ARU?
The operating temperature range of the AD8552ARU is from -40°C to +125°C.
- What is the supply current per op amp for the AD8552ARU?
The supply current per op amp for the AD8552ARU is 700 μA.
- Does the AD8552ARU require external capacitors?
No, the AD8552ARU does not require external capacitors.
- What is the common-mode rejection ratio (CMRR) of the AD8552ARU?
The CMRR of the AD8552ARU is up to 130 dB.
- What is the overload recovery time of the AD8552ARU?
The overload recovery time of the AD8552ARU is 50 μs.
- What are some typical applications of the AD8552ARU?
The AD8552ARU is typically used in temperature sensors, pressure sensors, precision current sensing, strain gage amplifiers, medical instrumentation, and thermocouple amplifiers.
- What is the input voltage range of the AD8552ARU?
The input voltage range of the AD8552ARU is from 0 V to 5 V.
- How does the AD8552ARU maintain its low offset voltage?
The AD8552ARU uses a proprietary topology with a main amplifier and a secondary amplifier to correct the offset voltage of the main amplifier, ensuring low offset voltage over a wide temperature range and throughout its operating lifetime.
- What is the large signal voltage gain of the AD8552ARU?
The large signal voltage gain of the AD8552ARU is up to 135 dB.
