MOD VIIA Inertial Single Axis Accelerometer (K120A054)

MOD VIIA Inertial Single Axis Accelerometer (K120A054)
a Kearfott product.
Contact:

Marketing (Kearfott)
Phone:973-785-6000

The MOD VIIA is a cost optimized member of the MOD VII family with medium accuracy navigation and tactical grade performance in thermally modeled strap down applications.
Description:
How Does it Work?
The MOD VIIA accelerometer is a miniature gas damped, force rebalanced, pendulous accelerometer. The acceleration sensor is a dc torque capacitive displacement sensing pickoff. Acceleration inputs applied along the sensitive axis cause a relative displacement of the proof mass to the case. This displacement is sensed by the pickoff electronics resulting in a pickoff error signal which is amplified and demodulated. The error signal is converted to an analog current and applied to the torquer coil to bring the proof mass back to a null pickoff error position. The feedback current is proportional to the sensed acceleration input. The MOD VIIA also contains an integral ASIC capture loop, a temperature sensor, and it needs only ±15V dc power for operation.
Features:
    • Mature design, proven reliability
    • Integral analog capture loop and temperature sensor
    • Built-In Test (BIT) and voltage test capability

Functions:
    • Provides single axis acceleration
    • Common internal clock option for multiple units
    • Units with custom requirements can be provided

Specifications:
Range Continuous: 0 ± 60g
Intermittent: 0 ± 120g
Scale Factor Absolute: 1.33mA/g (+5%/-15%)
Thermal Model: 100 PPM
Stability: 100 PPM (one year)
Bias Absolute: 0 ± 100 mg
Thermal Model: 85µg
Stability: 100µg (one year)
Temperature Sensor 1.0 mA/°/C
Threshold <1 µg
Linearity 0 ± 5 µg/g²
Cross Coupling 0 ± 5 µg/g²
Vibration Rectification 0 ± 10 µg/g²rms
Vibration 10 grms
Shock 250g
Temperature -54°C to +95°C
Power 0.7W
Weight 54 ± 1 g²

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PDF Downloads: K120A054A Datasheet |