Overview
The AD708BQ is a high-precision, dual monolithic operational amplifier produced by Analog Devices Inc. This device is renowned for its excellent DC precision, making it ideal for applications requiring high accuracy and stability. The AD708BQ features ultralow offset voltage and offset voltage drift, ensuring minimal errors in signal amplification. It is available in an 8-lead ceramic dual in-line package (CERDIP) and is rated over the industrial temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Offset Voltage | 30 | 100 | 150 | μV |
| Input Offset Voltage Drift | 0.1 | 0.3 | 0.4 | μV/°C |
| Input Bias Current | 0.5 | 2.5 | 4.0 | nA |
| Common Mode Rejection Ratio (CMRR) | 120 | - | - | dB |
| Power Supply Rejection Ratio (PSRR) | 130 | - | - | dB |
| Open-Loop Gain | 5,000,000 | - | - | V/V |
| Quiescent Current | 4.5 | 5.5 | - | mA |
| Operating Voltage Range | ±3 | - | ±18 | V |
Key Features
- Ultralow Offset Voltage and Drift: The AD708BQ boasts a maximum offset voltage of 30 μV and an offset voltage drift of 0.3 μV/°C, ensuring high precision in signal amplification.
- High Open-Loop Gain: With a minimum open-loop gain of 5 million V/V, this amplifier is suitable for high-gain applications.
- Excellent Matching Characteristics: The device offers superior matching specifications, including offset voltage match and offset voltage drift match, making it ideal for precision instrumentation amplifiers.
- Low Noise: The AD708BQ has a guaranteed maximum input voltage noise of 350 nV p-p (0.1 Hz to 10 Hz), allowing for the amplification of very small signals without compromising system performance.
- Wide Operating Temperature Range: Rated over the industrial temperature range of -40°C to +85°C, this amplifier is versatile for various environmental conditions.
Applications
- Precision Instrumentation Amplifiers: The AD708BQ is ideal for constructing high-gain, precision instrumentation amplifiers due to its excellent matching and individual specifications.
- Signal Conditioning Circuits: Its low offset voltage and drift make it suitable for signal conditioning circuits where high accuracy is required.
- Medical and Industrial Equipment: The device's stability over a wide temperature range and low noise characteristics make it a good choice for medical and industrial equipment.
- Precision Absolute Value Circuits: The AD708BQ is well-suited for precision absolute value circuits, as demonstrated in its datasheet, due to its tight offset voltage drift match and high DC open-loop gain.
Q & A
- What is the maximum offset voltage of the AD708BQ?
The maximum offset voltage of the AD708BQ is 30 μV.
- What is the operating temperature range of the AD708BQ?
The AD708BQ operates over the industrial temperature range of -40°C to +85°C.
- What is the minimum open-loop gain of the AD708BQ?
The minimum open-loop gain of the AD708BQ is 5 million V/V.
- What is the typical input bias current of the AD708BQ?
The typical input bias current of the AD708BQ is 2.5 nA.
- What is the common mode rejection ratio (CMRR) of the AD708BQ?
The CMRR of the AD708BQ is a minimum of 120 dB.
- What is the power supply rejection ratio (PSRR) of the AD708BQ?
The PSRR of the AD708BQ is a minimum of 130 dB.
- What is the quiescent current of the AD708BQ?
The quiescent current of the AD708BQ is typically 5.5 mA.
- In what package is the AD708BQ available?
The AD708BQ is available in an 8-lead ceramic dual in-line package (CERDIP).
- What are some typical applications of the AD708BQ?
The AD708BQ is typically used in precision instrumentation amplifiers, signal conditioning circuits, medical and industrial equipment, and precision absolute value circuits.
- What are the key features that make the AD708BQ suitable for high-gain applications?
The AD708BQ's ultralow offset voltage, high open-loop gain, excellent matching characteristics, and low noise make it suitable for high-gain applications.
