SCA610 Series Accelerometer/Inclinometer FEATURES BENEFITS • Available ranges ±0.5g (±30º), ±1g (±90º), ±1.5g, ±1.7g, • Exceptional reliability, unprecedented accuracy • 8-pin plastic surface mount DIP package mountable with pick and excellent stability over temperature and time and place machines • Outstanding overload and shock durability • Enhanced failure detection • No additional components required • Digitally activated electrostatic self test (not for inclinometers) • Calibration memory parity check APPLICATIONS • Continuous connection failure detection • Acceleration measurement • Bi-directional acceleration measurement • Inclination measurement • Controlled frequency response in the sensing element • Motion measurement • Re-flow solderable, process compatible • Vibration measurement • Single +5V supply; ratiometric voltage output in the range For customised product please contact 4.75 … 5.25V VTI Technologies ELECTRICAL CHARACTERISTICS Parameter Condition Min. Typ. Max. Units Supply voltage Vdd 4.75 5.25 V Current consumption Vdd = 5V; No load 2.0 4.0 mA Operating temperature - 40 + 125 °C Resistive output load Vout to Vdd or Vss 20 kOhm Capacitive load Vout to Vdd or Vss 20 nF (1 Output noise DC...80kHz 0.25 mg PERFORMANCE CHARACTERISTICS Condition/ SCA610- SCA610- SCA610- SCA610- Parameter Units (13 (13 Comment CAHH1G CA1H1G C23H1A C28H1A (2 Measuring range Nominal g ±0.5 (±30º) ±1 (±90º) ±1.5 ±1.7 (3 Mounting plane Measuring Direction Horizontal Horizontal Horizontal Horizontal (4 Zero point (nom.) Mounting position Vdd/2 Vdd/2 Vdd/2 Vdd/2 V (5b (5a (5a (5a Sensitivity @ room temperature 4 2 1.333 1.2 V/g (6 Zero Point error -40..125°C ±60 ±60 ±125 ±125 mg (7 Zero Point tempco -25...85°C mg/ºC 0.15±0.35 0.15±0.35 0.3±0.6 0.3±0.6 (8b (8a (8a (8a Sensitivity error -40..125°C % ±4 ±4 ±4 ±4 (7 (8b (8b (8b (8b Sensitivity error -25...85°C ±2.5 ±2.5 ±3 ±3 % (7 (9b, c (9a, c (9b (9a Typical non-linearity Over measuring range ±10 ±20 ±30 ±40 mg (10 Cross-axis sensitivity 5 5 5 5 % (11 Frequency response -3dB point Hz 18±10 18±10 50±30 50±30 (12 Ratiometric error Vdd = 4.75...5.25V 2 2 2 2 % VDD = 5.00V, UNLESS OTHERWISE SPECIFIED Note 1 The noise density of CAHH1G and CA1H1G is 30 µg/ Hz, the noise density of C23H1A and C28H1A Note 9b Relative to straight line between ±0.5g. Note 9b In inclinometer applications a correction based on the angular error resulting from cross-axis is 20 µg/ Hz. sensitivity around the inclination angle reduces non-linearity. Note 2 The measuring range is limited by sensitivity, offset and supply voltage rails of the device. Note 10 The cross-axis sensitivity determines how much acceleration, perpendicular to the measuring Note 3 Measuring direction parallel to the mounting plane. axis, couples to the output. The total cross-axis sensitivity is the geometric sum of the Note 4 Vertical versions in +1g position, i.e. arrow up: horizontal versions pins down (+0g) sensitivities of the two axes, which are perpendicular to the measuring axis. Note 5a Sensitivity specified as [Vout (+1g) - Vout(-1g)] / 2 [V/g] . Note 11 The output has true DC (0Hz) response. Note 5b Sensitivity specified as [Vout (+0.5g) - Vout(-0.5g)][V/g] . Note 12 Supply voltage noise also couples to the output, due to the ratiometric (output proportional Note 6 Zero point error specified as (Vout (+0g) - Vdd/2) / Vsens [g] (room temp. error included); Vsens to supply voltage) nature of the accelerometer. = Nominal sensitivity. Note 13 Self test not recommended. Note 7 Typical tolerance, not 100 % tested. Note 8a Sensitivity error specified as {{[Vout (+1g) -Vout (-1g)] / 2} -Vsens} / Vsens x 100% [%] (room temp. error included); Vsens = Nominal sensitivity. 5.00V Vout(@Vx) x Note 8b Sensitivity error specified as {{[Vout (+0.5g) -Vout (-0.5g)] / 2} -Vsens} / Vsens x 100% [%] Vx The ratiometric error is specified as: (room temp. error included); Vsens = Nominal sensitivity. RE = 100% x 1- Vout(@5V) Note 9a Relative to straight line between ±1g. Rev. 26 Aug 2004 VTI Technologies reserves the right to modify this specification without prior to notice. SCA610 Series ABSOLUTE MAXIMUM RATINGS Parameter Value Units Acceleration (powered or non-powered) 20000 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 ºC ELECTRICAL CONNECTION RECOMMENDED CIRCUIT Pin# Pin Name Connection 1 Open or capacitively connected to GND for EMC*) 2 Open or capacitively connected to GND for EMC*) 3 Open or capacitively connected to GND for EMC*) 4 GND Negative supply voltage (VSS) 5 Open or capacitively connected to GND for EMC*) 6 ST Self-test control 7 VOUT Sensor analog output 8 VDD Positive supply voltage (VDD) *) recommended capacity min. 20pF – Effectiveness should be tested and if necessary adapted in the respective connection. DIMENSIONS PCB PAD LAYOUTS The accelerometer weighs under 1g. 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 VTI Technologies Oy VTI Technologies, Inc. Myllynkivenkuja 6 Frankfurt Branch One Park Lane Blvd. P.O. Box 27 Rennbahnstr. 72-74 Suite 804 - East Tower FI-01621 Vantaa D-60528 Frankfurt am Main Dearborn, MI 48126 Finland Germany USA Tel. +358 9 879181 Tel. +49 69 6786 880 Tel. +1 313 425 0850 Fax +358 9 87918791 Fax +49 69 6786 8829 Fax +1 313 425 0860 sales@vti.fi sales.de@vti.fi sales@vtitechnologies.com