Overview
The AD623BR, produced by Analog Devices Inc., is an integrated instrumentation amplifier designed for a wide range of applications requiring precise and reliable signal amplification. This amplifier delivers rail-to-rail output swing using supply voltages from 2.7 V to 12 V, making it versatile for both single and dual-supply configurations. The AD623BR offers user flexibility through single gain set resistor programming and conforms to the 8-lead industry standard pinout configuration. It is particularly suited for applications where high accuracy, low power consumption, and robust performance are critical.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 2.7 | - | 12 | V |
| Gain Range | 1 | - | 1000 | - |
| Gain Error (G = 1) | 0.03 | 0.10 | 0.10 | % |
| Gain Error (G > 1) | 0.10 | 0.35 | 0.35 | % |
| Bandwidth (G = 1) | - | 800 | - | kHz |
| Settling Time to 0.01% (G = 10) | - | 20 | - | µs |
| Common-Mode Rejection Ratio (CMRR) at 60 Hz | 70 | 80 | 86 | dB |
| Quiescent Current (Single Supply) | 305 | 480 | - | µA |
| Operating Temperature Range | -40 | - | 85 | °C |
Key Features
- Adjustable Gain: The gain can be set using a single external resistor, allowing for gains from 1 to 1000.
- High Common-Mode Rejection Ratio (CMRR): The AD623 maintains a high CMRR, which increases with increasing gain, ensuring effective noise rejection up to 200 Hz.
- Low Power Consumption: Suitable for battery-powered applications with a maximum quiescent current of 550 µA.
- Wide Input Common-Mode Range: Can amplify signals with common-mode voltages as low as 150 mV below ground.
- High Accuracy and Stability: Features low offset voltage and low offset drift, ensuring precision over time and temperature variations.
- Low Input Bias Currents: Ideal for precision applications, especially with high-impedance sources.
- Rail-to-Rail Output Swing: Maximizes dynamic range when operating from low supply voltages.
Applications
- Low Power Medical Instrumentation: Suitable for medical devices requiring high accuracy and low power consumption.
- Transducer Interfaces: Ideal for amplifying signals from transducers in various industrial and medical applications.
- Thermocouple Amplifiers: Used in thermocouple applications where precise signal amplification is necessary.
- Industrial Process Controls: Employed in industrial process control systems for reliable and accurate signal amplification.
- Difference Amplifiers: Used as a difference amplifier in applications requiring the amplification of differential signals.
- Low Power Data Acquisition: Suitable for data acquisition systems that require low power consumption and high accuracy.
Q & A
- What is the supply voltage range for the AD623BR?
The AD623BR operates with supply voltages from 2.7 V to 12 V, and it can also be used with dual supplies ranging from ±2.5 V to ±6 V.
- How is the gain of the AD623BR set?
The gain of the AD623BR is set using a single external resistor connected between the gain pins, allowing for gains from 1 to 1000.
- What is the common-mode rejection ratio (CMRR) of the AD623BR?
The CMRR of the AD623BR is high, typically around 80 dB at 60 Hz, and it increases with increasing gain up to 200 Hz.
- What is the quiescent current of the AD623BR?
The quiescent current of the AD623BR is typically 480 µA for single supply and 550 µA for dual supply configurations.
- What are the key applications of the AD623BR?
The AD623BR is used in low power medical instrumentation, transducer interfaces, thermocouple amplifiers, industrial process controls, difference amplifiers, and low power data acquisition systems.
- How does the AD623BR handle common-mode noise?
The AD623BR effectively rejects common-mode noise due to its high CMRR, which remains constant up to 200 Hz.
- What is the input impedance of the AD623BR?
The input impedance of the AD623BR is high, typically around 2 GΩ || 2 pF for both differential and common-mode inputs.
- Can the AD623BR operate with a single power supply?
Yes, the AD623BR can operate with a single power supply from 3 V to 12 V, in addition to dual supply configurations.
- What is the settling time of the AD623BR?
The settling time of the AD623BR to 0.01% is typically 20 µs for a gain of 10.
- Is the AD623BR suitable for battery-powered devices?
Yes, the AD623BR is suitable for battery-powered devices due to its low power consumption and ability to operate from a single supply.
