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MMA685X Datasheet(PDF) 21 Page - Freescale Semiconductor, Inc

Part # MMA685X
Description  Single-Axis SPI Inertial Sensor
PDF  52 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MMA685X Datasheet(HTML) 21 Page - Freescale Semiconductor, Inc

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Sensors
Freescale Semiconductor, Inc.
21
MMA685x
3.3
Voltage Regulators
Separate internal voltage regulators supply the analog and digital circuitry. External filter capacitors are required, as shown in
Figure 1. The voltage regulator module includes voltage monitoring circuitry which indicates a device reset until the external sup-
ply and all internal regulated voltages are within predetermined limits. A reference generator provides a stable voltage which is
used by the
ΣΔ converters.
Figure 7. Power Supply
Figure 8. Voltage Monitoring
CREGA
CREG
VCC
TRACKING
REGULATOR
VOLTAGE
REGULATOR
REFERENCE
GENERATOR
VREGA = 2.50 V
DIGITAL
LOGIC
DSP
OTP
ARRAY
PRIMARY
OSCILLATOR
ΣΔ
CONVERTER
BIAS
GENERATOR
TRIM
TRIM
VREF = 1.250 V
VREG = 2.50 V
BANDGAP
REFERENCE
Tracks VREGA
SET DEVRES Flag
VCC
VREGA
VREG
VREF
MONITOR
BANDGAP
VCCUV
VREGOV
VREGUV
VREGAUV
VREGAOV
VREFOV
VREFUV
GROUND LOSS
MONITOR
VREG
POR
VBGMON
VPORREF
Note: No external access to reference voltage
Limits verified by characterization only



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