Accelerometers GENERAL PURPOSE, LP SERIES ▼ High Performance, 1-Axis and 3-Axis Accelerometers ▼ Small, Low-Cost ▼ Reliable Packaging with Screw-Down Mounting ▼ Factory Calibrated New DigCal Option! Applications Automotive Testing ▼ Instrumentation ▼ Equipment Monitoring accelerometers ▼ ▼ Standard Package LP Series The LP Series accelerometers are low cost, general purpose, linear acceleration and/or vibration sensors available in ranges of ± 4 g, ± 10 g, ± 25 g, ± 50 g, and ± 100 g. Common applications are automotive testing, instrumentation, and equipment monitoring. The LP Series sensing element is a silicon micro-machined capacitive beam. The capacitive beam is held in force balance for full scale non-linearity of less than 0.2 %. The LP Series offers wide dynamic range, has excellent frequency response, operates on a single +5 VDC power supply, and is easy to interface to standard data acquisition systems. The scale factor and the 0 g output level are both ratiometric to the power supply so the accelerometer and any following circuitry will track each other if the supply voltage varies. Alternatively, by specifying the -R option, an unregulated 8-30 V power supply can be used. The LP Series is offered with a standard 5-pin female connector. The highly flexible, low-mass cable prevents disruption of the measurement. In addition, Crossbow offers its new DigiCal cable and connector option. The DigiCal connector allows the user to read the sensor ID, serial number, and calibration information using an I2C bus commonly available on microcontrollers. This new option functions as a TEDS or Transducer Electronic Datasheet, allowing customers to automatically readout the sensor parameters upon power up. Crossbow recommends its new ACCEL-WIZARD data acquisition system for use with the LP Series and DigiCal . The ACCEL-WIZARD data logger and real-time data acquisition system is described on page 25. The ACCEL-WIZARD is a capable highspeed data acquisition system that works with personal computers and laptops via RS-232. The new DigiCal Compared to traditional piezoelectric LP sensors plug into the ACCELand piezoresistive accelerometer WIZARD. ACCEL-WIZARD recognizes technologies, the silicon microthe sensors, their measurement range, machined sensors offer equivalent perand calibration data. The ACCELformance at a significantly lower cost. WIZARD and LP Series combination allows for turn-key test and measurement that can be set up and configured in a matter of minutes. ▼ 12 Document Part Number: 6020-0001-01 c r o s s b o w t e c h n o l o g y, i n c ▼ 41 daggett drive ▼ san jose, ca 95134-2109 C Weight CXL10LP1 CXL10LP1Z CXL10LP3 CXL25LP1 CXL25LP1Z CXL25LP3 CXL50LP1 CXL50LP1Z CXL50LP3 CXL100LP1Z ±4 ± 0.2 500 ± 25 ±5 ± 0.2 ±2 10 DC -100 ± 10 ± 0.2 200 ± 10 ±5 ± 0.2 ±2 10 DC -100 ± 25 ± 0.2 80 ± 4 +5 ± 0.2 ±2 10 DC -100 ± 50 ± 0.2 40 ± 2 ±5 ± 0.2 ±2 50 DC -100 ± 100 ± 0.2 20 ± 4 ±5 ± 0.2 ±2 80 DC -100 -40 to +85 2000 -40 to +85 2000 -40 to +85 2000 -40 to +85 2000 -40 to +85 2000 + 5.0 + 8.0 to 30 5/axis + 2.5 ± 0.1 ± 2.0 ± 0.1 > 10 kΩ, < 1 nF + 5.0 + 8.0 to 30 5/axis + 2.5 ± 0.1 ± 2.0 ± 0.1 > 10 kΩ, < 1 nF + 5.0 + 8.0 to 30 5/axis + 2.5 ± 0.1 ± 2.0 ± 0.1 > 10 kΩ, < 1 nF + 5.0 + 8.0 to 30 5/axis + 2.5 ± 0.1 ± 2.0 ± 0.1 > 10 kΩ, < 1 nF + 5.0 + 8.0 to 30 5/axis + 2.5 ± 0.1 + 2.0 + 0.2 > 10 kΩ, < 1 nF Standard package Aluminum package Standard package Aluminum package Remarks ± 5% 0°C to 70°C typical typical typical typical @25°C 0.75” x 1.875” x 1.00 (1.90 cm x 4.76 cm x 2.54 cm) 0.95” x 2.00” x 1.20” (2.41 cm x 5.08 cm x 3.05 cm) 1.62 oz (46 gm) 2.40 oz (68 gm) Notes Sensitivity is ratiometric to supply: Vout = [Vs/2 + (sensitivity x Vs/5 x accel)]. Zero g Output is ratiometric to supply, proportional to Vs/2. Non-linearity is the deviation from a best fit straight line at full scale. Transverse sensitivity is error measured in the primary axis output created by forces induced in the orthogonal axis. Transverse sensitivity error is primarily due to the effects of misalignment (i.e., much of it can be tuned out by adjusting the package orientation or mathematical compensation). Zero g drift is specified as the typical change in 0 g level from its initial value at +25°C to its worst case value at Tmin or Tmax. Specifications subject to change without notice. Pin Color Function 1 2 3 4 5 Red Black White Yellow Green Power In Ground X-axis Out Y-axis Out Z-axis Out accelerometers Specifications Performance Input Range (g) Zero g Drift (g) Sensitivity (mV/g) Transverse Sensitivity (% Span) Non-Linearity (% FS) Alignment Error (deg) Noise (mg rms) Bandwidth (Hz) Environment Operating Temp. Range (°C) Shock (g) Electrical Supply Voltage (Volts) Supply Voltage -R option (VDC) Supply Current (mA) Zero g Output (Volts) Span Output (Volts) Output Loading Physical Size CXL04LP1 CXL04LP1Z CXL04LP3 Pin Diagram (w/o DigiCal) 1 6 DigCal Connector (Right Hand British-Telcom) High Temperature Package Model Axes CXL04LP1 CXL04LP1Z CXL04LP3 CXL10LP1 CXL10LP1Z CXL10LP3 CXL25LP1 CXL25LP1Z CXL25LP3 CXL50LP1 CXL50LP1Z CXL50LP3 CXL100LP1Z OPTIONS -R -AL -D X Z TRI X Z TRI X Z TRI X Z TRI Z Ordering Information Span Sensitivity (g) (mV/g) ±4 ±4 ±4 ± 10 ± 10 ± 10 ± 25 ± 25 ± 25 ± 50 ± 50 ± 50 ±100 500 500 500 200 200 200 80 80 80 40 40 40 20 Noise (mg rms) 10 10 10 10 10 10 10 10 10 50 50 50 80 Bandwidth (Hz) DC-100 DC-100 DC-100 DC-100 DC-100 DC-100 DC-100 DC-100 DC-100 DC-100 DC-100 DC-100 DC-100 Voltage Regulator, 8 – 30 VDC input (not available with DigiCal) High Temperature Package (see package drawing above) Digital Calibration EEPROM (DigiCal) Document Part Number: 6020-0001-01 phone: 408.965.3300 ▼ f a x : 4 0 8 . 3 2 4 .4 8 4 0 ▼ e - m a i l : i n f o @ x b o w. c o m ▼ w e b : w w w. x b o w. c o m ▼ 13