Overview
The AD621ARZ-R7, produced by Analog Devices Inc., is a low drift, low power instrumentation amplifier designed for high accuracy and ease of use. It is particularly suited for a wide range of applications, including precision data acquisition systems, weigh scales, transducer interface circuits, and industrial process controls. The AD621 stands out for its unique combination of high performance, small size, and low power consumption, making it an excellent choice for portable and remote applications where power dissipation, size, and weight are critical.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Gain Error (VOUT = ±10 V) | 0.15% | 0.05% | 0.15% | % |
| Nonlinearity (VOUT = –10 V to +10 V, RL = 2 kΩ) | 2 ppm | 10 ppm | 2 ppm | ppm of FS |
| Gain vs. Temperature | -1.5 ppm/°C | ±5 ppm/°C | -1.5 ppm/°C | ppm/°C |
| Total Voltage Offset (RTI, VS = ±15 V) | 35 µV | 125 µV | 250 µV | µV |
| Offset Voltage Drift (VS = ±5 V to ±15 V) | 0.3 µV/°C | 1.0 µV/°C | 2.5 µV/°C | µV/°C |
| Input Voltage Noise (1 kHz) | 9 nV/√Hz | 13 nV/√Hz | 17 nV/√Hz | nV/√Hz |
| Bandwidth (G = 10) | 800 kHz | kHz | ||
| Settling Time to 0.01% | 12 µs | µs | ||
| Supply Current | 1.3 mA | mA |
Key Features
- Low drift and low power consumption, making it suitable for battery-powered and portable equipment.
- High accuracy with low gain errors and low nonlinearity.
- Fixed gains of 10 and 100 can be easily set via external pin strapping.
- Compact packaging in 8-lead SOIC, 8-lead plastic DIP, or 8-lead cerdip.
- Excellent AC specifications with a bandwidth of 800 kHz at a gain of 10.
- Low input voltage noise of 9 nV/√Hz at 1 kHz.
Applications
- Precision data acquisition systems.
- Weigh scales and transducer interface circuits.
- Industrial process controls.
- Battery-powered and portable equipment.
- Remote applications where power dissipation, size, and weight are critical.
Q & A
- What is the AD621ARZ-R7 used for? The AD621ARZ-R7 is used in precision data acquisition systems, weigh scales, transducer interface circuits, industrial process controls, and other applications requiring high accuracy and low power consumption.
- What are the fixed gain options for the AD621ARZ-R7? The AD621ARZ-R7 can be set to fixed gains of 10 and 100 via external pin strapping.
- What is the maximum supply current of the AD621ARZ-R7? The maximum supply current is 1.3 mA.
- What is the bandwidth of the AD621ARZ-R7 at a gain of 10? The bandwidth at a gain of 10 is 800 kHz.
- What is the settling time of the AD621ARZ-R7 to 0.01%? The settling time to 0.01% is 12 µs.
- What are the packaging options for the AD621ARZ-R7? The AD621ARZ-R7 is available in 8-lead SOIC, 8-lead plastic DIP, or 8-lead cerdip packaging.
- What is the input voltage noise of the AD621ARZ-R7 at 1 kHz? The input voltage noise at 1 kHz is 9 nV/√Hz.
- How does the AD621ARZ-R7 perform in terms of gain drift? The AD621ARZ-R7 has a gain drift of ±5 ppm/°C.
- What is the offset voltage drift of the AD621ARZ-R7? The offset voltage drift is 0.3 µV/°C to 2.5 µV/°C.
- Is the AD621ARZ-R7 suitable for remote and portable applications? Yes, it is suitable due to its low power consumption and compact size.
