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Pin Connections
16 15 14 13
V CC 1
V SS 2
I DATA 3
V SS 4
17
12 V SSA
11 V REGA
10 CS
9 V REG
5
6
7
8
Figure 4. Top View, 16-Pin QFN Package
Table 1. Pin Description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Pin
Name
V CC
V SS
I DATA
V SS
PCM
SCLK
D OUT
D IN
V REG
CS
V REGA
VSSA
V BUF
TEST
BUS_SW
VSSA
PAD
Corner
Pads
Formal Name
Supply
Digital GND
Response
Current
Digital GND
PCM
Output
SPI Clock
SPI Data Out
SPI Data In
Digital
Supply
Chip Select
Analog
Supply
Analog GND
Power
Supply
Test Pin
Bus Switch
Gate Drive
Analog GND
Die Attach Pad
Corner Pads
Definition
This pin is connected to the PSI5 power and data line through a resistor and supplies power to the device. An external capac-
itor must be connected between this pin and V SS . Reference Figure 1 .
This pin is the power supply return node for the digital circuitry.
This pin is connected to the PSI5 power and data line through a resistor and modulates the response current for PSI5 com-
munication. Reference Figure 1 .
This pin is the power supply return node for the digital circuitry.
This pin provides a 4 MHz PCM signal proportional to the acceleration data for test purposes. The output can be enabled via
OTP. Reference Section 3.5.3.7 . If unused, this pin must be left unconnected.
This input pin provides the serial clock to the SPI port for test purposes. An internal pulldown device is connected to this pin.
This pin must be grounded or left unconnected in the application.
This pin functions as the serial data output from the SPI port for test purposes. This pin must be left unconnected in the appli-
cation.
This pin functions as the serial data input to the SPI port for test purposes. An internal pulldown device is connected to this
pin. This pin must be grounded or left unconnected in the application.
This pin is connected to the power supply for the internal digital circuitry. An external capacitor must be connected between
this pin and V SS . Reference Figure 1 .
This input pin provides the chip select to the SPI port for test purposes. An internal pullup device is connected to this pin.This
pin must be left unconnected in the application.
This pin is connected to the power supply for the internal analog circuitry. An external capacitor must be connected between
this pin and V SSA . Reference Figure 1 .
This pin is the power supply return node for the analog circuitry.
This pin is connected to a buffer regulator for the internal circuitry. The buffer regulator supplies both the analog (V REGA ) and
digital (V REG ) supplies to provide immunity from EMC and supply dropouts on V CC . An external capacitor must be connected
between this pin and V SS . Reference Figure 1 .
This pin is must be grounded or left unconnected in the application.
This pin is the drive for a low-side daisy chain switch. When daisy chain mode is enabled, this pin is connected to the gate of
an n-channel FET which connects V SS to V SS_OUT. Reference Figure 1 . If unused, this pin must be left unconnected.
This pin is the power supply return node for the analog circuitry.
This pin is the die attach flag, and is internally connected to VSS. Reference Section 7 for die attach pad connection details.
The corner pads are internally connected to V SS .
MMA52xxKW
Sensors
4
Freescale Semiconductor, Inc.
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