Overview
The AD22284-A, part of the ADXL278 series, is a low-power, complete dual-axis accelerometer produced by Analog Devices Inc. This device is integrated on a single monolithic IC and is designed for high-performance and cost-effectiveness. It is particularly suited for front and side impact airbag applications but also serves a wide variety of other uses. The ADXL278 series is the fourth generation of surface micromachined iMEMS® accelerometers from Analog Devices, offering enhanced performance and lower cost.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Full-Scale Range | IOUT ≤ ±100 µA | 37 | 55 | 70 | g |
| Nonlinearity | 0.2 | 2 | 2 | % | |
| Package Alignment Error | 1 | 1 | 1 | Degree | |
| Sensor-to-Sensor Alignment Error | 0.1 | 0.1 | 0.1 | Degree | |
| Cross-Axis Sensitivity | -5 | +5 | % | ||
| Resonant Frequency | 24 | 24 | 24 | kHz | |
| Sensitivity, Ratiometric (Over Temperature) | VDD = 5 V, 100 Hz | 52.25 | 55 | 57.75 | mV/g |
| Zero-g Output Voltage | VDD = 5 V | -150 | +150 | mV | |
| Supply Voltage | 3.5 | 6 | V | ||
| Quiescent Supply Current | IOUT = ±400 µA | 2.2 | µA | ||
| Operating Temperature Range | -40 | +105 | °C |
Key Features
- Complete dual-axis acceleration measurement system on a single monolithic IC.
- Available in ±35 g/±35 g, ±50 g/±50 g, or ±70 g/±35 g output full-scale ranges.
- Full differential sensor and circuitry for high resistance to EMI/RFI.
- Environmentally robust packaging in a 5 mm × 5 mm × 2 mm, 8-terminal ceramic LCC package.
- Self-test feature that fully exercises all the mechanical and electrical elements of the sensor with a digital signal applied to a single pin.
- Output ratiometric to supply voltage.
- Sensitive axes in the plane of the chip.
- High linearity of full scale.
- Frequency response down to dc.
- Low noise and low power consumption.
- Tight sensitivity tolerance and 0 g offset capability.
- Largest available prefilter clipping headroom.
- 400 Hz, 2-pole Bessel filter.
- Single-supply operation.
- Compatible with Sn/Pb and Pb-free solder processes.
- Qualified for automotive applications.
Applications
- Front and side impact airbag applications.
- Dynamic acceleration vibration and static acceleration gravity measurement.
- A wide variety of other applications requiring precise acceleration measurement.
- Automotive safety systems.
- Industrial and consumer electronics requiring high-g acceleration sensing.
Q & A
- What is the AD22284-A used for?
The AD22284-A is a dual-axis accelerometer used for measuring acceleration in various applications, including front and side impact airbag systems and other industrial and consumer electronics.
- What are the output full-scale ranges available for the AD22284-A?
The AD22284-A is available in ±35 g/±35 g, ±50 g/±50 g, or ±70 g/±35 g output full-scale ranges.
- What is the operating temperature range of the AD22284-A?
The operating temperature range is from -40°C to +105°C.
- What type of packaging does the AD22284-A come in?
The AD22284-A is packaged in a 5 mm × 5 mm × 2 mm, 8-terminal ceramic LCC package.
- Does the AD22284-A have a self-test feature?
Yes, the AD22284-A has a self-test feature that fully exercises all the mechanical and electrical elements of the sensor with a digital signal applied to a single pin.
- What is the sensitivity of the AD22284-A?
The sensitivity is ratiometric to the supply voltage, with typical values ranging from 52.25 mV/g to 57.75 mV/g for the X-axis and 36.1 mV/g to 39.9 mV/g for the Y-axis.
- Is the AD22284-A resistant to EMI/RFI?
Yes, the AD22284-A features full differential sensor and circuitry for high resistance to EMI/RFI.
- What is the frequency response of the AD22284-A?
The frequency response extends down to dc, with a 400 Hz, 2-pole Bessel filter.
- Is the AD22284-A suitable for automotive applications?
Yes, the AD22284-A is qualified for automotive applications and meets the necessary reliability and quality standards.
- What is the power supply range for the AD22284-A?
The power supply range is from 3.5 V to 6 V.
