Overview
The AD8551ARMZ-R2, produced by Analog Devices Inc., is a precision operational amplifier that belongs to the AD855x family. This single-channel op-amp is renowned for its ultralow offset voltage, drift, and bias current, making it ideal for high-accuracy applications. The AD8551ARMZ-R2 operates on a single supply voltage ranging from 2.7 V to 5 V and features rail-to-rail input and output swings. This amplifier combines the benefits of auto-zeroing or chopper-stabilized amplifiers at a lower cost, with no requirement for external capacitors.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | - | 1 | 5 | 10 | μV |
| Input Bias Current | IB | -40°C ≤ TA ≤ +125°C | 10 | 50 | 1.5 nA | pA/nA |
| Input Offset Current | IOS | -40°C ≤ TA ≤ +125°C | 20 | 70 | 400 pA | pA |
| Input Voltage Range | - | - | 0 | - | 5 V | V |
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to +5 V | 115 | - | 130 dB | dB |
| Large Signal Voltage Gain | AVO | RL = 10 kΩ, VO = 0.3 V to 4.7 V | 110 | - | 140 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 |
| Overload Recovery Time | - | - | - | - | 50 | μs |
Key Features
- Low Offset Voltage: 1 μV, ensuring high accuracy in measurements.
- Low Offset Drift: 0.005 μV/°C, maintaining stability over a wide temperature range.
- Rail-to-Rail Input and Output Swings: Allows the input common-mode voltage range to reach both supply rails and provides a wide output voltage swing.
- Single-Supply Operation: Operates from 2.7 V to 5 V, making it versatile for various applications.
- High Gain, CMRR, PSRR: Offers high common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR) of up to 130 dB.
- Ultralow Input Bias Current: As low as 20 pA, reducing errors in precision measurements.
- Low Supply Current: 700 μA per op-amp, which is energy-efficient.
- No External Capacitors Required: Simplifies the 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: Suitable for thermocouple-based temperature measurement systems.
Q & A
- What is the typical offset voltage of the AD8551ARMZ-R2?
The typical offset voltage is 1 μV.
- What is the operating supply voltage range for the AD8551ARMZ-R2?
The AD8551ARMZ-R2 operates from 2.7 V to 5 V with a single supply.
- Does the AD8551ARMZ-R2 require external capacitors?
No, the AD8551ARMZ-R2 does not require external capacitors.
- What is the common-mode rejection ratio (CMRR) of the AD8551ARMZ-R2?
The CMRR is up to 130 dB.
- What is the typical supply current per op-amp for the AD8551ARMZ-R2?
The typical supply current is 700 μA per op-amp.
- What is the overload recovery time of the AD8551ARMZ-R2?
The overload recovery time is 50 μs.
- What are some common applications of the AD8551ARMZ-R2?
Common applications include temperature sensors, pressure sensors, precision current sensing, strain gage amplifiers, medical instrumentation, and thermocouple amplifiers.
- What is the input bias current of the AD8551ARMZ-R2?
The input bias current is as low as 20 pA.
- What is the offset voltage drift of the AD8551ARMZ-R2?
The offset voltage drift is 0.005 μV/°C.
- What package type is the AD8551ARMZ-R2 available in?
The AD8551ARMZ-R2 is available in an 8-lead MSOP package.
