Overview
The AD8551AR, produced by Analog Devices Inc., is a zero-drift, single-supply, rail-to-rail operational amplifier. This device is part of the AD855x family, which includes single, dual, and quad amplifier configurations. The AD8551AR is specifically designed to offer high accuracy and low cost, making it an ideal choice for applications where precision is crucial. It operates from a single supply voltage ranging from 2.7 V to 5 V and features an ultralow offset voltage of 1 μV and an offset drift of 0.005 μV/°C. This amplifier is well-suited for various sensitive measurement applications due to its high gain, common-mode rejection ratio (CMRR), and power supply rejection ratio (PSRR).
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | — | 1 | — | 5 | μV |
| Offset Voltage Drift | ΔVOS/ΔT | —40°C ≤ TA ≤ +125°C | 0.005 | — | 0.04 | μV/°C |
| Input Bias Current | IB | —40°C ≤ TA ≤ +125°C | 10 | — | 50 | pA |
| Input Offset Current | IOS | —40°C ≤ TA ≤ +125°C | 20 | — | 70 | pA |
| Input Voltage Range | — | — | 0 | — | 5 | V |
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 2.7 V | 115 | — | 130 | dB |
| Supply Current per Amplifier | ISY | VO = 0 V | 700 | — | 900 | μA |
| Overload Recovery Time | — | — | — | — | 50 | μs |
Key Features
- Low Offset Voltage: 1 μV, making it suitable for high-precision applications.
- Low Offset Drift: 0.005 μV/°C, ensuring stability over a wide temperature range.
- Rail-to-Rail Input and Output Swing: Allows for both high-side and low-side sensing.
- Single-Supply Operation: Operates from 2.7 V to 5 V.
- High Gain, CMRR, PSRR: Up to 130 dB, providing excellent noise rejection.
- Ultralow Input Bias Current: 20 pA, minimizing input current errors.
- Low Supply Current: 700 μA per amplifier, efficient for power-sensitive applications.
- No External Capacitors Required: Simplifies circuit design and reduces component count.
- Fast Overload Recovery Time: 50 μs, ensuring quick recovery from overload conditions.
Applications
- Temperature Sensors: Ideal for precise temperature measurements.
- Pressure Sensors: Suitable for high-accuracy pressure sensing applications.
- Precision Current Sensing: Used in applications requiring accurate current measurements.
- Strain Gage Amplifiers: Enhances the accuracy of strain gage measurements.
- Medical Instrumentation: Used in medical devices where high precision is critical.
- Thermocouple Amplifiers: Provides accurate amplification of thermocouple signals.
Q & A
- What is the typical offset voltage of the AD8551AR?
The typical offset voltage of the AD8551AR is 1 μV.
- What is the operating voltage range for the AD8551AR?
The AD8551AR operates from a single supply voltage ranging from 2.7 V to 5 V.
- What is the input bias current of the AD8551AR?
The input bias current of the AD8551AR is typically 20 pA.
- Does the AD8551AR require external capacitors?
No, the AD8551AR does not require external capacitors.
- What is the common-mode rejection ratio (CMRR) of the AD8551AR?
The CMRR of the AD8551AR is up to 130 dB.
- What is the supply current per amplifier for the AD8551AR?
The supply current per amplifier for the AD8551AR is typically 700 μA.
- What is the overload recovery time of the AD8551AR?
The overload recovery time of the AD8551AR is 50 μs.
- In what temperature range does the AD8551AR operate?
The AD8551AR operates in the extended industrial/automotive temperature range of –40°C to +125°C.
- What are some common applications of the AD8551AR?
The AD8551AR is commonly used in temperature sensors, pressure sensors, precision current sensing, strain gage amplifiers, medical instrumentation, and thermocouple amplifiers.
- What package options are available for the AD8551AR?
The AD8551AR is available in 8-lead MSOP and narrow 8-lead SOIC packages.
