Overview
The AD625SD, produced by Analog Devices Inc., is a precision instrumentation amplifier designed to meet the needs of circuits requiring nonstandard gains and low-cost, precision software programmable gain amplification. This amplifier is highly versatile, allowing users to program gains from 1 to 10,000 using just three external resistors. It is available in various accuracy grades to cater to different temperature ranges, including industrial, commercial, and extended temperature ranges.
Key Specifications
| Parameter | Min | Typ | Max |
|---|---|---|---|
| Gain Range | 1 | - | 10,000 |
| Gain Error | - | - | 0.02% Max |
| Gain Temperature Coefficient | - | - | 5 ppm/°C Max |
| Nonlinearity | - | - | 0.001% Max |
| Input Offset Voltage | - | - | 25 µV |
| 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) |
| Operating Temperature Range | -55°C | - | 125°C |
| Power Supply Range | ±6 V | - | ±18 V |
| Quiescent Current | - | - | 3.5 mA |
| Package | - | - | 16-Lead Ceramic or Plastic DIP, 20-Terminal LCC |
Key Features
- User-Programmable Gains: The AD625 allows for gains to be programmed from 1 to 10,000 using three external resistors, providing high flexibility in circuit design.
- Low Gain Error and Temperature Coefficient: The amplifier features a low gain error of 0.02% max and a gain temperature coefficient of 5 ppm/°C max, ensuring high precision over a range of temperatures.
- Low Nonlinearity and Offset Voltage: It offers a maximum nonlinearity of 0.001% and an input offset voltage of 25 µV, which are crucial for high-precision applications.
- Low Noise: The AD625 has a low noise level of 4 nV/√Hz at 1 kHz, making it suitable for applications requiring low noise performance.
- High Gain Bandwidth Product: With a gain bandwidth product of 25 MHz, the AD625 provides excellent ac performance.
- Independent Input and Output Offset Nulling: The amplifier includes totally independent input and output offset nulling terminals, which help minimize the effects of offset voltage in gain-ranging applications.
- MIL-Standard Parts Available: The AD625 is available in MIL-standard parts, making it suitable for military and high-reliability applications.
Applications
- Industrial Automation: The AD625 is ideal for industrial automation systems that require precise signal amplification and conditioning.
- Medical Devices: Its high precision and low noise make it suitable for medical devices such as ECG and EEG machines.
- Test and Measurement Equipment: The amplifier is used in various test and measurement instruments where accurate signal amplification is critical.
- Aerospace and Defense: The availability of MIL-standard parts makes the AD625 a reliable choice for aerospace and defense applications.
- Automotive Systems: It can be used in automotive systems for sensor signal conditioning and amplification.
Q & A
- What is the gain range of the AD625SD?
The AD625SD allows for gains to be programmed from 1 to 10,000 using three external resistors.
- What is the maximum gain error of the AD625SD?
The maximum gain error of the AD625SD is 0.02%.
- What is the gain temperature coefficient of the AD625SD?
The gain temperature coefficient of the AD625SD is 5 ppm/°C max.
- What is the input offset voltage of the AD625SD?
The input offset voltage of the AD625SD is 25 µV.
- What is the noise level of the AD625SD at 1 kHz?
The noise level of the AD625SD at 1 kHz is 4 nV/√Hz.
- What is the gain bandwidth product of the AD625SD?
The gain bandwidth product of the AD625SD is 25 MHz.
- What are the available package types for the AD625SD?
The AD625SD is available in 16-Lead Ceramic or Plastic DIP and 20-Terminal LCC packages.
- What is the operating temperature range of the AD625SD?
The operating temperature range of the AD625SD is -55°C to +125°C.
- What is the power supply range for the AD625SD?
The power supply range for the AD625SD is ±6 V to ±18 V.
- What are some typical applications of the AD625SD?
The AD625SD is typically used in industrial automation, medical devices, test and measurement equipment, aerospace and defense, and automotive systems.
