Overview
The AD621ARZ from Analog Devices Inc. is a low-cost, low-power, high-accuracy instrumentation amplifier. It is designed to be easy to use and is ideally suited for a wide range of applications, including precision data acquisition systems, weigh scales, transducer interface circuits, and industrial process controls. The AD621ARZ features fixed gains of 10 and 100, which can be easily set via external pin strapping. Its unique combination of high performance, small size, and low power outperforms discrete in-amp implementations, making it a versatile choice for various industrial and medical applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Gain | 10, 100 | - |
| Gain Error | 0.15% (Max) | % |
| Nonlinearity | 10 ppm (Max) | ppm of FS |
| Gain Drift | ±5 ppm/°C | ppm/°C |
| Total Offset Voltage | 125 µV (Max) | µV |
| Offset Voltage Drift | 1.0 µV/°C (Max) | µV/°C |
| Voltage Noise | 9 nV/√Hz @ 1 kHz | nV/√Hz |
| Bandwidth | 800 kHz (G = 10), 200 kHz (G = 100) | kHz |
| Settling Time | 12 µs to 0.01% | µs |
| Supply Current | 1.3 mA (Max) | mA |
| Operating Supply Voltage | 2.3 V to 18 V | V |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package | 8-Lead SOIC | - |
Key Features
- Easy to use with pin-strappable gains of 10 and 100.
- Low power consumption with a maximum supply current of 1.3 mA.
- High accuracy with low gain errors and low gain drift.
- Excellent DC performance, including low offset voltage and drift.
- Low noise specifications, including 9 nV/√Hz voltage noise at 1 kHz.
- Compact packaging in 8-lead SOIC, 8-lead plastic DIP, or 8-lead cerdip.
- Wide power supply range from 2.3 V to 18 V.
- High bandwidth of 800 kHz (G = 10) and 200 kHz (G = 100).
- Fast settling time of 12 µs to 0.01%.
Applications
- Precision data acquisition systems.
- Weigh scales and transducer interface circuits.
- Industrial process controls.
- Battery-powered and portable equipment.
- Medical devices such as ECG and blood pressure monitors.
Q & A
- What are the fixed gain options for the AD621ARZ?
The AD621ARZ has fixed gain options of 10 and 100, which can be set via external pin strapping.
- What is the maximum supply current of the AD621ARZ?
The maximum supply current is 1.3 mA.
- What is the operating temperature range of the AD621ARZ?
The operating temperature range is -40°C to +85°C.
- What is the bandwidth of the AD621ARZ at different gain settings?
The bandwidth is 800 kHz at a gain of 10 and 200 kHz at a gain of 100.
- What is the settling time of the AD621ARZ?
The settling time is 12 µs to 0.01%.
- What are the typical applications of the AD621ARZ?
Typical applications include precision data acquisition systems, weigh scales, transducer interface circuits, industrial process controls, and medical devices.
- What is the noise performance of the AD621ARZ?
The AD621ARZ has a voltage noise of 9 nV/√Hz at 1 kHz and 0.28 µV p-p noise from 0.1 Hz to 10 Hz.
- What is the package type of the AD621ARZ?
The AD621ARZ is available in an 8-lead SOIC package.
- What is the maximum offset voltage of the AD621ARZ?
The maximum total offset voltage is 125 µV.
- How does the AD621ARZ compare to discrete in-amp designs?
The AD621ARZ outperforms discrete in-amp designs with its high functionality, low gain errors, and low gain drift errors, all at a lower cost.
