SCA610 Series Accelerometer/Inclinometer FEATURES * Available ranges 0.5 g (30 ), 1 g (90 ), 1.5 g, 1.7 g, 3.0 g * 8-pin plastic surface mount DIP package mountable with pick and place machines * Enhanced failure detection * Digitally activated electrostatic self test (not for inclinometers) * Calibration memory parity check * Continuous connection failure detection * Bi-directional acceleration measurement * Controlled frequency response in the sensing element * Single +5 V supply; ratiometric voltage output in the range 4.75 ... 5.25 V * Lead-free reflow solderable lead-free component BENEFITS * Exceptional reliability, unprecedented accuracy and excellent stability over temperature and time * Outstanding overload and shock durability * No additional components required APPLICATIONS * Acceleration measurement * Inclination measurement * Motion measurement * Vibration measurement For customised product please contact VTI Technologies ELECTRICAL CHARACTERISTICS Parameter Condition Supply voltage Vdd Current consumption Typ. Max. 4.75 Vdd = 5 V; No load Operating temperature Resistive output load Min. 2.0 - 40 Vout to Vdd or Vss Units 5.25 V 4.0 mA + 125 20 C kOhm Capacitive load Vout to Vdd or Vss 20 nF Output noise (1 DC...4 kHz 5 mVrms SCA610C21H1A SCA610C23H1A SCA610C28H1A SCA610C13H1A SCA610CC5H1A 1.5 Horizontal 1.7 Horizontal 1 .5 Horizontal 3 Horizontal PERFORMANCE CHARACTERISTICS Parameter Condition/ Comment Measuring range (2 Nominal Mounting plane (3 Measuring Direction SCA610- SCA610CAHH1G (13 CA1H1G (13 0.5 (30 ) 1 (90 ) Horizontal Horizontal 1 Horizontal Units g Zero point (nom.) (4 Mounting position Vdd/2 Vdd/2 Vdd/2 Vdd/2 Vdd/2 Vdd/2 Vdd/2 V Sensitivity @ room temperature 4 (5b 2 (5a 2 (5a 1.333 (5a 1.2 (5a 1.33 (5a 0.75 (5a V/g 50 4 (8b 2.5 (8b 10 (9b, c 50 4 (8a 2.5 (8a 10(9a, c 125 5 (8a 3 (8a 20(9a 125 5 (8a 3 (8a 20 (9a 125 5 (8a 3 (8a 20(9a 125 5 (8a 3 (8a 20(9a 195 5 (8a 3 (8a 60(9a mg Zero Point error (6 -40..125 C Sensitivity error -40..125 C Sensitivity error (7 -25...85 C Typical non-linearity (7 Over measuring range Cross-axis sensitivity (10 Frequency response -3dB point (11 Ratiometric error (12 Vdd = 4.75...5.25 V % % mg 5 5 4 4 4 4 4 % 1810 1810 5030 5030 5030 400150 11555 Hz 2 2 2 2 2 2 2 % VDD = 5.00 V, UNLESS OTHERWISE SPECIFIED Note 1 Note 2 Note 3 Note 4 Note 5a Note 5b Note 6 Note 7 Note 8a Note 8b Note 9a The noise density of CAHH1G and CA1H1G is 30 g/ Hz, the noise density of C23H1A and C28H1A is 20 g/ Hz. The measuring range is limited by sensitivity, offset and supply voltage rails of the device. Measuring direction parallel to the mounting plane. Vertical versions in +1 g position, i.e. arrow up: horizontal versions pins down (+0 g) Sensitivity specified as [Vout (+1 g) - Vout(-1 g)] / 2 [V/g] . Sensitivity specified as [Vout (+0.5 g) - Vout(-0.5 g)][V/g] . Zero point error specified as (Vout (+0 g) - Vdd/2) / Vsens [g] (room temp. error included); Vsens = Nominal sensitivity. Typical tolerance, not 100 % tested. Sensitivity error specified as {{[Vout (+1 g) -Vout (-1 g)] / 2} -Vsens} / Vsens x 100 % [%] (room temp. error included); Vsens = Nominal sensitivity. Sensitivity error specified as {{[Vout (+0.5 g) -Vout (-0.5 g)] / 2} -Vsens} / Vsens x 100 % [%] (room temp. error included); Vsens = Nominal sensitivity. Relative to straight line between 1 g. Rev. 3 /30 Dec 2005 VTI Technologies reserves the right to modify this specification without prior to notice. Note 9b Note 9c Note 10 Note 11 Note 12 Note 13 Relative to straight line between 0.5 g. In inclinometer applications a correction based on the angular error resulting from cross-axis sensitivity around the inclination angle reduces non-linearity. The cross-axis sensitivity determines how much acceleration, perpendicular to the measuring axis, couples to the output. The total cross-axis sensitivity is the geometric sum of the sensitivities of the two axes, which are perpendicular to the measuring axis. The output has true DC (0 Hz) response. Supply voltage noise also couples to the output, due to the ratiometric (output proportional to supply voltage) nature of the accelerometer. Self test not recommended. The ratiometric error is specified as: RE = 100% x 1- Vout(@Vx) x 5.00V Vx Vout(@5V) SCA610 Series ABSOLUTE MAXIMUM RATINGS Parameter Value Acceleration (powered or non-powered) 20000 Units g Supply voltage -0.3 to +7.0 V Voltage at input / output pins -0.3 to Vdd + 0.3 V Temperature range -55 to +125 C ELECTRICAL CONNECTION Pin# Pin Name Connection 1 Open or capacitively connected to GND for EMC*) 2 Open or capacitively connected to GND for EMC*) 3 4 RECOMMENDED CIRCUIT Open or capacitively connected to GND for EMC*) GND Negative supply voltage (VSS) 6 ST Self-test control 7 VOUT Sensor analog output 8 VDD Positive supply voltage (VDD) 5 Open or capacitively connected to GND for EMC*) *) recommended capacity min. 20 pF - Effectiveness should be tested and if necessary adapted in the respective connection. DIMENSIONS PCB PAD LAYOUTS The accelerometer weighs under 1 g. The size of the part is approximately (w x h x l) 9 x 5 x 11 mm. Pin pitch is standard 100 mils. Acceleration in the direction of the arrow will increase the output voltage. VTI Technologies Oy Myllynkivenkuja 6 P.O. Box 27 FI-01621 Vantaa Finland Tel. +358 9 879 181 Fax +358 9 879 18791 sales@vti.fi VTI Technologies Oy Frankfurt Branch Rennbahnstr. 72-74 D-60528 Frankfurt am Main Germany Tel. +49 69 6786 880 Fax +49 69 6786 8829 sales.de@vti.fi VTI Technologies, Inc. One Park Lane Blvd. Suite 804 - East Tower Dearborn, MI 48126 USA Tel. +1 313 425 0850 Fax +1 313 425 0860 sales@vtitechnologies.com