Overview
The AD622AR, produced by Analog Devices Inc., is a low-cost, moderately accurate instrumentation amplifier. It is designed to replace discrete, two or three op-amp instrumentation amplifier designs, offering superior performance in terms of common-mode rejection, linearity, temperature stability, and reliability. The AD622AR requires only one external resistor to set any gain between 2 and 1000, and for a gain of 1, no external resistor is needed. This amplifier is a complete difference or subtractor amplifier system, incorporating precision laser-trimmed resistors for enhanced performance.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Mfr | Analog Devices Inc. | Series | - |
| Product Status | Production | Amplifier Type | Instrumentation |
| Number of Circuits | 1 | Output Type | - |
| Slew Rate | 1.2 V/µs | -3db Bandwidth | 1 MHz (G=1), 12 kHz (G=1000) |
| Current - Input Bias | 2 nA | Voltage - Input Offset | 60 µV |
| Current - Supply | 900 µA | Current - Output / Channel | 18 mA |
| Voltage - Supply Span (Min) | 5.2 V | Voltage - Supply Span (Max) | 36 V |
| Operating Temperature | -40°C ~ 85°C | Mounting Type | Surface Mount |
Key Features
- Low cost and moderately accurate instrumentation amplifier.
- Requires only one external resistor to set gain between 2 and 1000.
- Superior linearity and common-mode rejection due to precision laser-trimmed resistors.
- Good temperature stability and reliability.
- Reference terminal for precise offset injection.
- Input protection against high input currents.
Applications
- Transducer interface.
- Low-cost thermocouple amplifier.
- Industrial process controls.
- Difference amplifier.
- Low-cost data acquisition systems.
- Precision measurement systems.
- Industrial control systems.
Q & A
- What is the AD622AR used for?
The AD622AR is used as a low-cost, moderately accurate instrumentation amplifier, suitable for various applications such as transducer interfaces, thermocouple amplifiers, industrial process controls, and data acquisition systems.
- How is the gain set on the AD622AR?
The gain on the AD622AR is set using only one external resistor, allowing gains between 2 and 1000. For a gain of 1, no external resistor is required.
- What are the key performance features of the AD622AR?
The AD622AR offers superior linearity, common-mode rejection, temperature stability, and reliability. It also incorporates precision laser-trimmed resistors for enhanced performance.
- What is the operating temperature range of the AD622AR?
The operating temperature range of the AD622AR is -40°C to +85°C.
- What is the maximum supply voltage for the AD622AR?
The maximum supply voltage for the AD622AR is ±18 V.
- Does the AD622AR have input protection?
Yes, the AD622AR safely withstands an input current of ±60 mA for several hours at room temperature.
- What is the slew rate of the AD622AR?
The slew rate of the AD622AR is 1.2 V/µs.
- What are the package options for the AD622AR?
The AD622AR is available in 8-Lead PDIP and 8-Lead SOIC packages.
- Can the AD622AR be used in precision measurement systems?
Yes, the AD622AR is suitable for use in precision measurement systems due to its high precision and noise rejection capabilities.
- How does the reference terminal on the AD622AR function?
The reference terminal on the AD622AR allows for precise offset injection to the output, useful when the load does not share a precise ground with the rest of the system.
