Overview
The AD625CDZ is a precision instrumentation amplifier produced by Analog Devices Inc. It is specifically designed to fulfill two major areas of application: circuits requiring nonstandard gains and circuits requiring a low-cost, precision software-programmable gain amplifier. The AD625CDZ offers high precision and flexibility, making it suitable for a wide range of applications that demand accurate signal amplification.
Key Specifications
| Parameter | Min | Typ | Max |
|---|---|---|---|
| Gain Range | 1 | - | 10,000 |
| Gain Error | - | - | 0.02% Max |
| Gain Temperature Coefficient (TC) | - | - | 5 ppm/°C Max |
| Nonlinearity | - | - | 0.001% Max |
| Input Offset Voltage | - | - | 25 µV |
| Input Offset Voltage Drift | - | - | 0.25 µV/°C Max |
| Noise (at 1 kHz) | - | - | 4 nV/√Hz |
| Gain Bandwidth Product | - | - | 25 MHz |
| Slew Rate | - | - | 5 V/µs |
| Settling Time to 0.01% (20 V Step) | - | - | 15 µs (G = 1 to 200) |
| Power Supply Range | ±6 V | - | ±18 V |
| Quiescent Current | - | - | 5 mA |
| Operating Temperature Range | -40°C | - | +85°C |
| Storage Temperature Range | -65°C | - | +150°C |
Key Features
The AD625CDZ boasts several key features that make it an ideal choice for precision instrumentation applications:
- User-Programmed Gains: The amplifier can be programmed for any gain between 1 and 10,000 using three external resistors.
- Low Gain Error and TC: It offers a low gain error of 0.02% max and a gain temperature coefficient of 5 ppm/°C max.
- Low Nonlinearity: The amplifier has a maximum nonlinearity of 0.001% at G = 1.
- Low Offset Voltage and Drift: It features an input offset voltage of 25 µV and an input offset voltage drift of less than 0.25 µV/°C.
- Low Noise: The input voltage noise is 4 nV/√Hz at 1 kHz.
- High Gain Bandwidth Product: The amplifier has a gain bandwidth product of 25 MHz.
- Fast Dynamic Response: It includes a slew rate of 5 V/µs and a settling time to 0.01% of 15 µs for gains up to 200.
- Independent Offset Nulling: The AD625CDZ provides totally independent input and output offset nulling terminals for high precision applications.
- MIL-Standard Parts Available: It is available in military-grade packages and meets MIL-STD specifications.
Applications
The AD625CDZ is suitable for a variety of applications, including:
- Medical Instrumentation: ECG, EEG, and other medical monitoring systems.
- Industrial Process Controls: Precision measurement and control in industrial environments.
- Data Acquisition Systems: High-precision data acquisition and signal conditioning.
- Transducer Interfaces: Amplifying signals from various transducers such as strain gauges, thermocouples, and pressure sensors.
- Weight Scales and Load Cells: Precision weighing and load measurement applications.
- Battery-Powered and Portable Equipment: Applications requiring low power consumption and high precision.
Q & A
- What is the gain range of the AD625CDZ?
The AD625CDZ can be programmed for any gain between 1 and 10,000 using three external resistors.
- What is the maximum gain error of the AD625CDZ?
The maximum gain error is 0.02%.
- What is the gain temperature coefficient (TC) of the AD625CDZ?
The gain temperature coefficient is 5 ppm/°C max.
- What is the input offset voltage of the AD625CDZ?
The input offset voltage is 25 µV.
- What is the input voltage noise of the AD625CDZ at 1 kHz?
The input voltage noise is 4 nV/√Hz at 1 kHz.
- What is the gain bandwidth product of the AD625CDZ?
The gain bandwidth product is 25 MHz.
- What is the slew rate of the AD625CDZ?
The slew rate is 5 V/µs.
- What is the settling time to 0.01% for a 20 V step at G = 1 to 200?
The settling time is 15 µs.
- What are the operating and storage temperature ranges for the AD625CDZ?
The operating temperature range is -40°C to +85°C, and the storage temperature range is -65°C to +150°C.
- Is the AD625CDZ available in military-grade packages?
Yes, the AD625CDZ is available in military-grade packages and meets MIL-STD specifications.
