AD8628ARTZ-REEL7 Detailed explanation of pin function specifications and circuit principle instructions

The part number "AD8628ARTZ-REEL7" refers to an operational amplifier from Analog Devices, specifically from their AD8628 series. This series of operational amplifiers is well-known for its precision, low noise, and high-speed performance, commonly used in applications requiring low offset voltage and high accuracy.

1. Brand:

Manufacturer: Analog Devices Series: AD8628 (Precision Operational Amplifier)

2. Package Type and Pin Count:

Package: The "ARTZ" suffix indicates that this part is available in an 8-lead SOIC (Small Outline Integrated Circuit) package. Pin Count: 8 pins

3. Pin Function and Detailed Description:

Pinout Table for AD8628ARTZ (SOIC-8 Package): Pin No. Pin Name Pin Function Description 1 Offset Null This pin is used for offset voltage adjustment. A potentiometer or resistor can be placed here to adjust the offset voltage. 2 Inverting Input (−) This is the inverting input of the operational amplifier. Signals applied here are inverted with respect to the non-inverting input. 3 Non-inverting Input (+) This is the non-inverting input. Signals applied here are passed without inversion. 4 V− (Negative Power Supply) This pin is connected to the negative voltage supply (ground or negative voltage). 5 Output This pin provides the output of the operational amplifier. The amplified signal is available here. 6 NC (No Connection) This pin has no internal connection and can be left unconnected in the circuit design. 7 V+ (Positive Power Supply) This pin is connected to the positive voltage supply. It is usually a positive voltage (e.g., +5V, +12V, or +15V). 8 Offset Null This is another pin for adjusting the offset voltage, similar to pin 1. These pins are used for external offset adjustments.

4. General Functional Description:

The AD8628 is a precision operational amplifier designed for applications requiring extremely low input bias currents and low offset voltages. It is designed to provide high performance in terms of voltage offset and noise, making it ideal for high-precision applications like instrumentation, audio, and industrial control systems.

Important Circuit Considerations:

Offset Adjustment: The AD8628 features two offset adjustment pins (pins 1 and 8) which allow for external trimming of the offset voltage. Power Supply: Ensure that both the positive (V+) and negative (V−) power supplies are correctly connected, as this determines the operational range of the amplifier. Input Impedance: The amplifier has very high input impedance, making it ideal for high-impedance signal sources.

5. Common FAQ (Frequently Asked Questions) about AD8628ARTZ:

1. Q: What is the supply voltage range for the AD8628ARTZ operational amplifier?

A: The AD8628ARTZ can operate with a supply voltage range from ±2.5V to ±18V.

2. Q: How can I adjust the offset voltage of the AD8628ARTZ?

A: The offset voltage can be adjusted by connecting a potentiometer or a resistor between pins 1 and 8 (Offset Null pins).

3. Q: What is the input bias current for the AD8628ARTZ?

A: The input bias current of the AD8628ARTZ is typically less than 1pA, making it suitable for high-impedance applications.

4. Q: Can the AD8628ARTZ be used in single-supply configurations?

A: Yes, the AD8628ARTZ can be used in single-supply configurations as long as the voltage between the V+ and V− pins meets the minimum supply voltage requirements.

5. Q: What is the recommended input voltage range for the AD8628ARTZ?

A: The recommended input voltage range for the AD8628ARTZ is between V− + 0.5V and V+ − 0.5V.

6. Q: What is the output voltage swing for the AD8628ARTZ?

A: The output voltage swing of the AD8628ARTZ is typically from (V− + 0.5V) to (V+ − 0.5V) at a load of 10kΩ to ground.

7. Q: How does the AD8628ARTZ perform in noisy environments?

A: The AD8628ARTZ has very low noise characteristics, making it suitable for precision measurement and low-noise applications.

8. Q: Can the AD8628ARTZ be used for audio applications?

A: Yes, the AD8628ARTZ is often used in audio circuits due to its low noise and high precision.

9. Q: What is the common-mode rejection ratio (CMRR) of the AD8628ARTZ?

A: The AD8628ARTZ has a high common-mode rejection ratio (CMRR) of 120dB typical, ensuring accurate performance even in noisy environments.

10. Q: How sensitive is the AD8628ARTZ to temperature variations?

A: The AD8628ARTZ has a low drift of offset voltage with temperature, with a typical value of 0.3µV/°C.

11. Q: What is the power consumption of the AD8628ARTZ?

A: The typical power consumption of the AD8628ARTZ is very low, with a supply current of about 1.5mA.

12. Q: Can I use the AD8628ARTZ in a low-voltage system?

A: Yes, the AD8628ARTZ can operate with supply voltages as low as ±2.5V, making it suitable for low-voltage systems.

13. Q: What is the typical offset voltage of the AD8628ARTZ?

A: The typical input offset voltage of the AD8628ARTZ is 25µV, which is very low for a precision op-amp.

14. Q: Is the AD8628ARTZ suitable for precision measurement applications?

A: Yes, with its low offset voltage, low noise, and high accuracy, the AD8628ARTZ is ideal for precision measurement applications.

15. Q: How do I calculate the gain of the AD8628ARTZ in my circuit?

A: The gain of the AD8628ARTZ can be calculated using the standard op-amp gain formulas based on the resistor values in the feedback loop.

16. Q: Can I use the AD8628ARTZ in differential amplifier configurations?

A: Yes, the AD8628ARTZ can be configured as a differential amplifier for amplifying the difference between two input signals.

17. Q: What is the input impedance of the AD8628ARTZ?

A: The input impedance of the AD8628ARTZ is typically 10^12Ω, making it suitable for high-impedance sources.

18. Q: What is the output drive capability of the AD8628ARTZ?

A: The AD8628ARTZ can drive loads as low as 10kΩ, ensuring compatibility with most standard circuits.

19. Q: Can the AD8628ARTZ be used in temperature-sensitive applications?

A: Yes, the AD8628ARTZ has low temperature drift characteristics, making it suitable for temperature-sensitive applications.

20. Q: What is the typical slew rate of the AD8628ARTZ?

A: The typical slew rate of the AD8628ARTZ is 0.3V/µs, providing adequate speed for most precision applications.

Conclusion:

The AD8628ARTZ is a high-precision operational amplifier from Analog Devices, suitable for a wide range of applications requiring low offset voltage, high input impedance, and low noise. The detailed pinout, function descriptions, and common FAQs will assist in successfully integrating it into your designs. If you have any further questions about using this device, feel free to ask!