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MMA5124LCWR2 Datasheet(PDF) 21 Page - NXP Semiconductors

Part # MMA5124LCWR2
Description  MMA51xxL, PSI5 Inertial Sensor
PDF  59 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

MMA5124LCWR2 Datasheet(HTML) 21 Page - NXP Semiconductors

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Sensors
NXP Semiconductors
21
MMA51xxL
3.3
Voltage Regulators
The device derives its internal supply voltage from the VCC and VSS pins. Separate internal voltage regulators are used for the
analog (VREGA) and digital circuitry (VREG). The analog and digital regulators are supplied by a buffer regulator (VBUF) to provide
immunity from EMC and supply dropouts on VCC. External filter capacitors are required, as shown in Figure 1.
The voltage regulator module includes voltage monitoring circuitry which holds the device in reset following power-on until the
internal voltages have increased above the under-voltage detection thresholds. The voltage monitor asserts internal reset when
the external supply or internally regulated voltages fall below the under-voltage detection thresholds. A reference generator
provides a reference voltage for the
ΣΔ converter.
Figure 9. Voltage Regulation and Monitoring
VREGA
VREG
VCC
VOLTAGE
REGULATOR
REFERENCE
GENERATOR
VREGA = 2.50 V
DIGITAL
LOGIC
DSP
OTP
ARRAY
OSCILLATOR
ΣΔ
CONVERTER
BIAS
GENERATOR
TRIM
TRIM
VREF
VREF_MOD = 1.250 V
VREG = 2.50 V
VOLTAGE
REGULATOR
VBUF
BANDGAP
REFERENCE
VBUF
VBUF
VREF
VREGA
VREF
POR
VCC
COMPARATOR
VREF
COMPARATOR
COMPARATOR
VBUF
COMPARATOR
VREGA
VREG
VOLTAGE
REGULATOR
Micro-cut
TRIM
TRIM



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