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SCA830-D07
Data Sheet
SCA830-D07 1-AXIS INCLINOMETER WITH DIGITAL SPI INTERFACE
Features
* * * * * * * * * * * * 3.3V supply voltage 1 g measurement range Single axis measurement in Y direction 30mg offset accuracy over temp range SPI digital interface Extensive self diagnostics features Size 7.6 x 3.3 x 8.6 mm (w x h x l) Qualified according to AEC-Q100 standard Package, pin-out and SPI protocol compatible with VTI digital accelerometer product family RoHS compliant Dual Flat Lead (DFL) plastic package suitable for lead free soldering process and SMD mounting Proven capacitive 3D-MEMS technology High resolution 16-bit A/D converter
Applications
The SCA830-D07 is targeted to applications with high stability requirements. Typical applications include * Hill Start Aid (HSA) * Electronic Parking Brake (EPB) * Roll Over detection * Suspension control * Inclinometers * Motion and position measurements
General Description
The SCA830-D07 is a single axis inclinometer component based on VTI's capacitive 3D-MEMS technology. The component integrates high accuracy micromechanical acceleration sensing together with a flexible SPI digital interface. Dual Flat Lead (DFL) housing guarantees reliable operation over product lifetime. The SCA830-D07 is designed, manufactured and tested for high stability, reliability and quality requirements of automotive applications. The inclinometer has an extremely stable output over wide ranges of temperature, humidity and mechanical noise. The component is qualified to the AEC-Q100 standard and has several advanced self diagnostics features. The DFL housing is suitable for SMD mounting and the component is compatible with the RoHS and ELV directives. The SCA830-D07 is a part of VTI's digital accelerometer family and fully compatible with its single axis accelerometers (SCA800 Series) and other multi axis accelerometers (SCA2100 Series and SCA3100 Series).
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Performance Characteristics
Vdd=3.3 V and ambient temperature unless otherwise specified. Parameter Condition Min 3.0 Active mode Power down mode Measurement axis (Y) Typ A) 5 -1 -90 -40 -70 -25 -1.5 20 1.1 32 000 0.00179 -4 1.4 0.9 -20 2 0 6.25 0.15 125 50 8 2 1 20 000 Customer readable ID register (27hex) 0A 20 3.5 4 Max 3.6 6.3 0.1 1 +90 125 +70 25 1.5 30 E) Units V mA mA g C mg mg mg mg Count/g /Count % FS % FS % FS mg % Counts Hz mg RMS s Hz pF MHz kV kV g
Analog and digital Vdd Current consumption Measurement range Operating temperature Total offset error B) Offset stability C) Offset calibration error D) Offset temperature drift Sensitivity Total sensitivity error Sensitivity calibration error Sensitivity temperature drift Linearity error Cross-Axis sensitivity Zero acceleration output Amplitude response Noise Power on setup time Output data rate Output load SPI clock rate ESD protection Moisture sensitivity level Mechanical shock ID register value
A) B)
Temperature range -40 ... +125 C Temperature range -40 ... +125 C @25C Temperature range -40 ... +125 C 16 bit output between 3 Temperature range -40 ... +125 C @25 C 5C Temperature range -40 ... +125 C +1g ... -1g range 2-complement -3dB frequency
0.3
Human Body Model Charge Device Model IPC/JEDEC J-STD-020C, Level 3
C)
D) E)
Typical values are 3 sigma variation limits from validation test population. Includes offset deviation from 0g value including calibration error and drift over lifetime, temperature and supply voltage. After mounting of the ECU to the application and after offset zero-setting at room temperature. Relevant offset failure due to temperature dependency of offset as well as aging over lifetime Includes offset deviation from 0g value including calibration error and drift over lifetime. Offset drift due to temperature. Value is a relative value and has been centered to zero. Error defined as maximum change of offset in temperature range. Offset (max)-Offset Min). 100% tested in production.
MOSI MISO SPI C/V A/D SCK Signal conditioning and filtering CSB Temp sensor PWM Self diagnostics PWM
Figure 1. SCA830-D07 Block diagram
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Typical Performance characteristics
Offset calibration error
40 35 30
Percent of parts[%]
25 20 15 10 5 0
-25 -20 -15 -10 -5 0 5 Offset [mg] 10 15 20 25 30 35
Temperature dependency of offset
30 25 20
Percent of parts[%]
Offset drift at temperature range -40 C...+125 C
30 25
+3 Sigma Mean -3 Sigma
o o
15 Offset[mg] 10 5 0 -5 -45 -10 -15 -20 Temp [o C] -20 5 30 55 80 105 130
20 15 10 5 0
-25 -20 -15 -10 -5 0 5 10 Offset drift [m g] 15 20 25 30 35
Sensitivity at 25 C
50 45 40
Percent of parts[%]
Percent of parts[%]
o
Sensitivity drift at temperature range -40 C...+125 C
50 45 40 35 30 25 20 15 10 5
o o
35 30 25 20 15 10 5 0
31300 31450 31600 31750 31900 32050 32200 32350 32500 32650 32800 Sensitivity [LSB/g]
0
-0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 Sensitivity error [% FS] -0.2 -0.1 0 0.1
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Measument directions
Figure 1. Accelerometer measuring directions
Earth gravitation
Figure 2. Zero acceleration output position
Housing dimensions
Figure 3. Housing dimensions
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SCA830-D07
Application Note for Acceleration Output Reading (16 bit output sensitivity)
This is addition to SCA8X0_21X0_3100 Product Family Specification chapter 3.1.
DOUT_LSB
Address: 4h Bits Mode 7:0 R
Initial Value 00h
Name DATA
Description Acceleration data LSB frame Read always DOUT_MSB prior to DOUT_LSB.
DOUT_MSB
Address: 5h Bits Mode 7:0 R
Initial Value 00h
Name DATA
Description Acceleration data MSB frame Reading of this register latches DOUT_LSB.
The bit level description of acceleration data from DOUT_LSB ... DOUT_MSB registers is presented below. The acceleration data is presented in 2's complement format. At 0 g acceleration the output is ideally 0000h.
+/-1g product Bit number SCA8xx +1g position -1g position +Full-scale -Full-scale
DOUT MSB bits(7:0) 15 14 13 s 512,0 256,0 0 1 1 1 0 0 0 1 1 1 0 0
12 128,0 1 0 1 0
11 64,0 1 0 1 0
10 32,0 1 0 1 0
9 16,0 0 1 1 0
8 8,0 1 1 1 0
DOUT LSB bits(7:0) 7 6 5 4,00 2,00 1,00 0 0 0 0 0 0 1 1 1 0 0 0
4 0,50 0 0 1 0
3 0,25 0 0 1 0
2 0,13 0 0 1 0
1 0,06 0 0 1 0
16b 0 [-] Bits (15:0) [Dec] 0,03 [mg] 0 1000 32000 0 -1000 -32000 1 1023 32767 0 -1024 -32768
s = sign bit Acceleration bits can be converted to mg acceleration (Acc) using following equation 15 14 13 12 11 10 9 8 7 6 5 4 4 1 - s 2 + b14 2 + b13 2 + b12 2 + b11 2 + b10 2 + b9 2 + b8 2 + b7 2 + b6 2 + b5 2 + b 4 2 + b3 2 Acc[mg ] = 32 + b 2 2 3 + b1 21 + b0
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Contact Information
Finland (head office) VTI Technologies Oy P.O. Box 27 Myllynkivenkuja 6 FI-01621 Vantaa Finland Tel. +358 9 879 181 Fax +358 9 8791 8791 E-mail: sales@vti.fi Japan Akebono Brake Industry Co.,Ltd. 5-4-71 Higashi, Hanyu-city Saitama Pref., 348-8501 Japan Tel. +81 48 560 1470 Fax +81 48 560 1469 www.akebono-brake.co.jp E-mail: forename.surname@vti.fi Germany VTI Technologies Oy Branch Office Frankfurt Rennbahnstrasse 72-74 D-60528 Frankfurt am Main, Germany Tel. +49 69 6786 880 Fax +49 69 6786 8829 E-mail: sales.de@vti.fi USA VTI Technologies, Inc. One Parklane Blvd. Suite 804 - East Tower Dearborn, MI 48126 USA Tel. +1 313 425 0850 Fax +1 313 425 0860 E-mail sales@vtitechnologies.com
China VTI Technologies Shanghai Office 6th floor, Room 618 780 Cailun Lu Pudong New Area 201203 Shanghai P.R. China Tel. +86 21 5132 0418 or +86 21 5132 0400 *112 Fax +86 21 513 20 416 E-mail: forename.surname@vti.fi
To find out your local sales representative visit www.vti.fi
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