Overview
The AD623BR-REEL, produced by Analog Devices Inc., is an integrated single-supply instrumentation amplifier known for its high accuracy, flexibility, and robust performance. This amplifier delivers rail-to-rail output swing on a single supply ranging from 3 V to 12 V, making it suitable for a variety of applications including low power medical instrumentation, transducer interfaces, thermocouple amplifiers, industrial process controls, and low power data acquisition. The AD623 offers superior user flexibility with single gain set resistor programming and conforms to the 8-lead industry standard pinout configuration.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | -6 | 6 | V | |
| Internal Power Dissipation | 650 | mW | ||
| Differential Input Voltage | -6 | 6 | V | |
| Gain Range | 1 | 1000 | ||
| Gain Error (G = 1) | 0.03 | 0.10 | 0.05 | % |
| Gain Error (G = 10) | 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 (G = 1) | 70 | 80 | 70 | dB |
| Common-Mode Rejection Ratio (CMRR) at 60 Hz (G = 10) | 90 | 100 | 90 | dB |
| Input Offset Voltage (AD623B) | 100 | µV | ||
| Input Bias Current | 25 | nA | ||
| Operating Temperature Range | -40 | 85 | °C |
Key Features
- Single Supply Operation: The AD623 can operate on a single supply ranging from 3 V to 12 V, making it suitable for battery-powered and portable devices.
- Adjustable Gain: The gain can be set using a single external resistor, allowing for gains from 1 to 1000.
- High Accuracy DC Performance: Features 0.10% gain error at unity gain and 0.35% gain error at higher gains.
- Low Input Bias Current: Input bias current is in the nanoampere range, making it ideal for precision applications with high-impedance sources.
- Excellent Common-Mode Rejection Ratio (CMRR): CMRR increases with increasing gain, providing superior rejection of line noise and harmonics.
- Low Power Consumption: Maximum quiescent current of 550 µA, suitable for low power applications.
- Wide Input Common-Mode Range: Can amplify signals with common-mode voltages as low as 150 mV below ground.
Applications
- Low Power Medical Instrumentation: Ideal for medical devices requiring precise signal amplification and low power consumption.
- Transducer Interfaces: Used for amplifying signals from transducers in various industrial and medical applications.
- Thermocouple Amplifiers: Suitable for thermocouple applications due to its high accuracy and stability.
- Industrial Process Controls: Used in industrial process control systems for precise signal amplification and noise rejection.
- Difference Amplifiers: Can be used as a difference amplifier in various applications requiring differential signal amplification.
- Low Power Data Acquisition: Ideal for data acquisition systems that require low power consumption and high accuracy.
Q & A
- What is the supply voltage range for the AD623?
The AD623 can operate on a single supply ranging from 3 V to 12 V or dual supplies from ±2.5 V to ±6 V.
- How is the gain of the AD623 set?
The gain of the AD623 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 AD623?
The CMRR of the AD623 is 70 dB at unity gain and 90 dB at higher gains, increasing with increasing gain.
- What is the input bias current of the AD623?
The input bias current of the AD623 is in the nanoampere range, typically 25 nA.
- What are the typical applications of the AD623?
The AD623 is used in low power medical instrumentation, transducer interfaces, thermocouple amplifiers, industrial process controls, and low power data acquisition.
- What is the operating temperature range of the AD623?
The operating temperature range of the AD623 is from -40°C to +85°C.
- How does the AD623 reject common-mode noise?
The AD623 rejects common-mode noise through its high CMRR, which increases with increasing gain, and its internal design that minimizes electromagnetic interference (EMI).
- What is the bandwidth of the AD623 at unity gain?
The bandwidth of the AD623 at unity gain is 800 kHz.
- What is the settling time of the AD623 to 0.01% at a gain of 10?
The settling time of the AD623 to 0.01% at a gain of 10 is 20 µs.
- Is the AD623 suitable for battery-powered devices?
Yes, the AD623 is suitable for battery-powered devices due to its single-supply operation and low power consumption.
