Overview
The AD8554ARUZ, produced by Analog Devices Inc., is a quad zero-drift operational amplifier that combines high accuracy with low cost. This amplifier is part of the AD8551, AD8552, and AD8554 family, which features single, dual, and quad configurations, respectively. The AD8554 is designed for applications requiring ultralow offset, drift, and bias current, making it ideal for sensitive measurement tasks.
The AD8554 operates on a single supply voltage ranging from 2.7 V to 5 V and does not require external capacitors. It boasts an offset voltage of only 1 μV and a drift of 0.005 μV/°C, ensuring high precision over a wide temperature range. The amplifier features rail-to-rail input and output swings and has a low supply current of 700 μA per op-amp.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| 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 | 20 | 70 | 200 pA | pA |
| Input Voltage Range | 0 | 5 V | V | |||
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to +5 V | 115 | 140 dB | dB | |
| Supply Current per Op-Amp | ISY | VO = 0 V | 700 | μA | ||
| Operating Temperature Range | −40°C | +125°C | °C |
Key Features
- Low Offset Voltage: 1 μV, ensuring high accuracy in measurements.
- Low Drift: 0.005 μV/°C, maintaining precision over a wide temperature range.
- Rail-to-Rail Input and Output: Allows the input common-mode voltage range to reach both supply rails and provides full output voltage swing.
- Single-Supply Operation: Operates from 2.7 V to 5 V.
- Low Supply Current: 700 μA per op-amp, making it power-efficient.
- 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 140 dB.
- Ultralow Input Bias Current: As low as 20 pA, suitable for high-impedance sources.
- Fast Overload Recovery Time: 50 μs, ensuring quick recovery from overloads.
Applications
- Temperature Sensors: Ideal for precise temperature measurements.
- Pressure Sensors: Suitable for pressure sensing applications requiring high accuracy.
- Precision Current Sensing: Used in applications where precise current measurement is critical.
- Strain Gage Amplifiers: For strain gage bridge circuits in various measurement applications.
- Medical Instrumentation: Used in medical devices requiring high precision and low noise.
- Thermocouple Amplifiers: For thermocouple-based temperature measurement systems.
Q & A
- What is the typical offset voltage of the AD8554?
The typical offset voltage of the AD8554 is 1 μV.
- What is the operating temperature range of the AD8554?
The AD8554 operates over a temperature range of −40°C to +125°C.
- What is the supply current per op-amp for the AD8554?
The supply current per op-amp is 700 μA.
- Does the AD8554 require external capacitors?
No, the AD8554 does not require external capacitors.
- What is the common-mode rejection ratio (CMRR) of the AD8554?
The CMRR of the AD8554 is up to 140 dB.
- What are some typical applications of the AD8554?
The AD8554 is typically used in temperature sensors, pressure sensors, precision current sensing, strain gage amplifiers, medical instrumentation, and thermocouple amplifiers.
- What is the input bias current of the AD8554?
The input bias current of the AD8554 is as low as 20 pA.
- What is the overload recovery time of the AD8554?
The overload recovery time of the AD8554 is 50 μs.
- Does the AD8554 support rail-to-rail input and output swings?
- What is the drift of the AD8554?
The drift of the AD8554 is 0.005 μV/°C.
