SCA720-D01
Murata Electronics Oy 1/12
www.muratamems.fi Doc.nr. 82171500 Rev.A
Data Sheet
SCA720-D01 SINGLE AXIS ACCELEROMETER WITH ANALOG INTERFACE
The SCA720 accelerometer consists of a silicon bulk micro machined sensing element chip and a signal
conditioning ASIC. The chips are mounted on a pre-molded package and wire bonded to appropriate contacts.
The sensing element and ASIC are protected with silicone gel and lid. The sensor has 12 SMD legs (Gull-wing
type).
Features
Single +5 V supply
Current consumption 2.5 mA typical
Ratiometric output in relation to supply
voltage (Vdd = 4.75 V...5.25 V)
Enhanced failure detection features
o Digitally activated, true self-test by
proof mass deflection using
electrostatic force
o Memory parity check during power
up, and self-test cycle.
o Built in connection failure detection
Digitally activated, true self-test by proof
mass deflection using electrostatic force
Wide load drive capability (max. 20 nF)
True DC response
Full traceability information in 2D-matrix on
the lid
Qualified according to AEC-Q100 standard
Applications
SCA720 product family is targeted to automotive
applications with high stability and reliability
requirements. Automotive target applications are:
Electrically Controlled Suspension
Engine Anti-Vibration
Figure 1. Functional block diagram.
ASIC
EEPROM for calibration
constants (32 bit, pari ty check
)
Measurem
en
t
circuitry
Gain &
filtering
for factory use only
GND
Vout
Sensing
element
Digital self
test input
5V supply
SCA720-D01
Murata Electronics Oy 2/13
www.muratamems.fi Doc. nr. 82171500 Rev.A
Table of Contents
SCA720-D01 single axis accelerometer with analog interface ........................................... 1
F
EATURES
.................................................................................................................................... 1
A
PPLICATIONS
.............................................................................................................................. 1
T
ABLE OF
C
ONTENTS
.................................................................................................................... 2
1.
Electrical Specifications ............................................................................................ 3
1.1.
A
BSOLUTE
M
AXIMUM
R
ATINGS
............................................................................................ 3
1.2.
P
ERFORMANCE
C
HARACTERISTICS
..................................................................................... 3
1.3.
O
FFSET AND SENSITIVITY CALIBRATION
................................................................................ 4
1.4.
E
RROR CALCULATIONS
....................................................................................................... 4
1.5.
S
UPPLY VOLTAGE
............................................................................................................... 5
1.6.
E
LECTRICAL
C
ONNECTION
.................................................................................................. 6
1.7.
L
IMITER FUNCTION
.............................................................................................................. 8
2.
Functional Description .............................................................................................. 9
2.1.
M
EASURING DIRECTIONS
.................................................................................................... 9
2.2.
V
OLTAGE TO ACCELERATION CONVERSION
.......................................................................... 9
2.3.
R
ATIOMETRIC
O
UTPUT
....................................................................................................... 9
2.4.
S
ELFTEST AND FAILURE DETECTION MODES
......................................................................... 9
3.
Application information ............................................................................................ 11
3.1.
H
OUSING DIMENSIONS AND RECOMMENDED
PCB
LAYOUT
.................................................. 11
3.2.
R
EFLOW SOLDERING
........................................................................................................ 12
SCA720-D01
Murata Electronics Oy 3/13
www.muratamems.fi Doc. nr. 82171500 Rev.A
1. Electrical Specifications
1.1. Absolute Maximum Ratings
Parameter
Value
Units
Acceleration (powered or non-powered) 20 000
(1
g
Supply voltage −0.3 to +7.0 V
Voltage at input / output pins
−0.3 to V
DD
+ 0.3
V
ESD HBM (Human Body Model)
±2
kV
ESD CDM (Charged Device Model)
±500 middle pins
±750 corner pins
V
Temperature range (storage) −50 to +125 °C
Temperature range (operating) −40 to +125 °C
1
Equals to drop from 1 meter on a concrete surface.
1.2. Performance Characteristics
V
DD
= 5.00 V and ambient temperature unless otherwise specified.
KPC
A
)
Parameter
Condition
Min.
Typ
M
ax.
Units
Measuring range Nominal -1.11 +3.11 g
Supply voltage Vdd 4.75 5.0 5.25 V
<CC> Current consumption Vdd = 5 V; No load 2.5 4.0 mA
Operating temperature −40 +125 °C
Resistive output load Vout to Vdd or Vss 20 k
Capacitive load Vout to Vdd or Vss 20 nF
Min. output voltage; Vdd = 5 V 20k from Vout to Vdd 0 0.25 V
Max. output voltage; Vdd = 5 V 20k from Vout to Vss 4.75 5.00 V
Linear output voltage range Limiter function
enabled
0.5 4.5 V
<CC> Offset (Output at +1 g) @ room temperature Vdd/2 V
<CC> Sensitivity @ room temperature 0.1875 ×
Vdd
( 0.9375)
V/g
<SC> Offset Error (Output at +1 g) −40 °C...125 °C -137 0 +137 mg
<SC> Sensitivity error −40 °C...125 °C −3 0 +3 %
Typical non-linearity Within the measuring
range
−60 +60 mg
Amplitude response −3 dB
B)
68 115 170 Hz
Ratiometric error Vdd = 4.75 V...5.25 V −2 +2 %
<SC> Cross-axis sensitivity @ room temperature 3.9 %
Output noise From DC...4 kHz 5 mV
rms
Start-up delay Reset and parity check 10 ms
Self test pull down resistor
(Internal)
44 62 80 k
A)
CC= Critical Characteristics. Must be 100% monitored during production
SC= Significant Characteristic. The process capability (Cpk) must be better than 1.33, which allows sample based
testing. If process is not capable the part will be 100% tested
B)
Output has true DC response

SCA720-D01-10

Mfr. #:
Manufacturer:
Murata Electronics
Description:
Accelerometers 1-Axis Accelerometer Analog
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet