Overview
The AD622ARZ, 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, reliability, and board area efficiency. The AD622 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 provides good common-mode rejection, superior linearity, and temperature stability, making it a versatile solution for various applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Gain Range | - | 2 | - | 1000 | - |
| Gain Error (G = 1) | VOUT = ±10 V | - | 0.15% | - | % |
| Input Offset Voltage | - | - | 125 μV | - | μV |
| Input Offset Drift | - | - | 1.0 μV/°C | - | μV/°C |
| Input Bias Current | - | - | 5 nA | - | nA |
| Common-Mode Rejection Ratio (G = 1) | - | 66 dB | - | - | dB |
| Bandwidth (G = 10) | - | - | 800 kHz | - | kHz |
| Slew Rate | - | - | 1.2 V/μs | - | V/μs |
| Supply Voltage Range | - | ±2.6 V | - | ±15 V | V |
| Supply Current | - | - | 1.5 mA | - | mA |
| Operating Temperature Range | - | -40°C | - | 85°C | °C |
Key Features
- Easy to use with a traditional pin configuration.
- Low-cost solution with higher performance than two or three op-amp designs.
- Unity gain achievable without an external resistor; optional gains set with one external resistor (range: 2 to 1000).
- Wide power supply range: ±2.6 V to ±15 V.
- Available in 8-lead PDIP and 8-lead SOIC_N packages.
- Low power consumption with a maximum supply current of 1.5 mA.
- Superior linearity and common-mode rejection due to precision laser-trimmed resistors.
- Reference terminal for precise offset injection to the output.
Applications
- Transducer interface.
- Low-cost thermocouple amplifier.
- Industrial process controls.
- Difference amplifier.
- Low-cost data acquisition.
Q & A
- What is the gain range of the AD622ARZ?
The AD622ARZ has a gain range of 2 to 1000, set by a single external resistor. For a gain of 1, no external resistor is required.
- What are the typical supply voltage and current requirements?
The AD622ARZ operates with a supply voltage range of ±2.6 V to ±15 V and has a maximum supply current of 1.5 mA.
- What is the common-mode rejection ratio (CMRR) of the AD622ARZ?
The CMRR of the AD622ARZ is a minimum of 66 dB at a gain of 1.
- What are the key packages available for the AD622ARZ?
The AD622ARZ is available in 8-lead PDIP and 8-lead SOIC_N packages.
- What is the input offset voltage and drift of the AD622ARZ?
The input offset voltage is 125 μV, and the input offset drift is 1.0 μV/°C.
- What are some common applications of the AD622ARZ?
Common applications include transducer interfaces, low-cost thermocouple amplifiers, industrial process controls, difference amplifiers, and low-cost data acquisition.
- How does the AD622ARZ improve over discrete op-amp designs?
The AD622ARZ offers better common-mode rejection, superior linearity, and temperature stability compared to discrete op-amp designs, while also reducing board area and cost.
- What is the bandwidth and slew rate of the AD622ARZ?
The bandwidth is 800 kHz at a gain of 10, and the slew rate is 1.2 V/μs.
- Can the AD622ARZ handle high input currents?
The AD622ARZ can safely withstand an input current of ±60 mA for several hours at room temperature.
- What is the operating temperature range of the AD622ARZ?
The operating temperature range is -40°C to 85°C.
