Overview
The AD622AR-REEL is a low-cost, moderately accurate instrumentation amplifier produced by Analog Devices Inc. It is designed to replace discrete, two or three op-amp instrumentation amplifier designs, offering superior linearity, temperature stability, and common-mode rejection. The AD622 requires only one external resistor to set any gain between 2 and 1000, making it a versatile and cost-effective solution. This amplifier is part of a complete difference or subtractor amplifier system, incorporating precision laser-trimmed resistors for enhanced performance.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Gain Range | 1 | - | 1000 | - |
| Gain Error (G = 1) | 0.05 | 0.15 | - | % |
| Nonlinearity (VOUT = ±10 V, G = 1-1000) | 10 | - | - | ppm |
| Small Signal -3 dB Bandwidth (G = 1) | 1000 | - | - | kHz |
| Slew Rate | 1.2 | - | - | V/µs |
| Input Offset Voltage (VOSI) | 60 | 125 | - | µV |
| Supply Voltage | ±2.6 | - | ±18 | V |
| Operating Temperature Range | -40 | - | 85 | °C |
| Package Type | - | - | - | 8-Lead SOIC |
Key Features
- Single external resistor for gain setting between 2 and 1000.
- Superior linearity and common-mode rejection due to precision laser-trimmed resistors.
- Low cost, replacing discrete instrumentation amplifier designs.
- Good temperature stability and reliability.
- Compact 8-Lead SOIC package.
- Reference terminal for precise offset injection.
- Input protection against high currents.
Applications
- Transducer interface.
- Low-cost thermocouple amplifier.
- Industrial process controls.
- Difference amplifier.
- Low-cost data acquisition systems.
Q & A
- What is the gain range of the AD622AR-REEL?
The AD622AR-REEL has a gain range of 1 to 1000, set by a single external resistor.
- What is the typical input offset voltage of the AD622AR-REEL?
The typical input offset voltage is 125 µV.
- What is the operating temperature range of the AD622AR-REEL?
The operating temperature range is -40°C to +85°C.
- What package type is the AD622AR-REEL available in?
The AD622AR-REEL is available in an 8-Lead SOIC package.
- How does the AD622AR-REEL provide common-mode rejection?
The AD622AR-REEL provides superior common-mode rejection through the use of precision laser-trimmed resistors.
- What is the slew rate of the AD622AR-REEL?
The slew rate is 1.2 V/µs.
- Can the AD622AR-REEL be used in high-current input scenarios?
Yes, the AD622AR-REEL has input protection and can safely withstand input currents of ±60 mA for several hours at room temperature.
- What is the supply voltage range for the AD622AR-REEL?
The supply voltage range is ±2.6 V to ±18 V.
- How does the reference terminal function in the AD622AR-REEL?
The reference terminal defines the zero output voltage and allows for precise offset injection, useful when the load does not share a precise ground with the rest of the system.
- What are some common applications of the AD622AR-REEL?
Common applications include transducer interfaces, low-cost thermocouple amplifiers, industrial process controls, difference amplifiers, and low-cost data acquisition systems.
