1221

Case Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125
Acceleration Over-range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2000g for 0.1 ms
Voltage on VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  -0.5V to 6.5V
Voltage on Any Pin (except DV) to GND ⁴ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   -0.5V to V_DD+0.5V
Voltage on DV to GND ⁵ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±15V
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   50 mW
Note 4: Voltages on pins other than DV, GND or V_DD may exceed 0.5 volt above or below the supply voltages provided the current is limited to 1 mA..

Note 5: The application of DV voltages higher than required to bring the output to positive full scale may cause device damage.

* NOTICE: Stresses greater than those listed above may cause permanent damage to the device. These are stress ratings only.Functional operation of the device at or above these conditions is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The Model 1221 is a low-cost, integrated accelerometer for use in zero to medium frequency instrumentation pplications that require extremely low noise. The 2g version is ideally suited for seismic applications. Each miniature, hermetically sealed package combines a micro-machined capacitive sense element and a custom integrated circuit that includes a sense amplifier and differential output stage. 1221 is relatively insensitive to temperature changes and thermal gradients. Each device is marked with a serial number on its bottom surface for traceability.An optional calibration test sheet (1221-TST) is also available which lists the measured bias, scale factor, linearity, perating current and frequency response.