EVAL-ADXL346Z Analog Devices Inc, EVAL-ADXL346Z Datasheet - Page 17

• Manufacturer Part Number: EVAL-ADXL346Z
• Description: Inertial Sensor Evaluation System
• Manufacturer: Analog Devices Inc

Specifications of EVAL-ADXL346Z

• Silicon Manufacturer: Analog Devices
• Silicon Core Number: ADXL346
• Kit Application Type: Sensing - Motion / Vibration / Shock
• Application Sub Type: Accelerometer
• Silicon Family Name: IMEMS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

I
With CS tied high to V
requiring a simple 2-wire connection as shown in
The ADXL346 conforms to the UM10204 I
and User Manual, Rev. 03—19 June 2007, available from NXP
Semiconductor. It supports standard (100 kHz) and fast (400 kHz)
data transfer modes if the bus parameters given in
Table 12
ported, as shown in
high, the 7-bit I
the R/
read. An alternate I
can be chosen by grounding the ALT ADDRESS pin. This
translates to 0xA6 for a write and 0xA7 for a read.
There are no internal pull-up or pull-down resistors for any
unused pins; therefore, there is no known state or default state
for the CS or ALT ADDRESS pin if left floating or unconnected.
It is required that the CS pin be connected to V
the ALT ADDRESS pin be connected to either V
when using I
Table 11. I
Parameter
Digital Input
Digital Output
Pin Capacitance
1
2
Limits are based on characterization results; not production tested.
C
Low Level Input Voltage (V
High Level Input Voltage (V
Low Level Input Current (I
High Level Input Current (I
Low Level Output Voltage (V
Low Level Output Current (I
W bit. This translates to 0x3A for a write and 0x3B for a
1
NOTES
1. THE SHADED AREAS REPRESENT WHEN THE DEVICE IS LISTENING.
SINGLE-BYTE WRITE
MASTER START
SLAVE
MULTIPLE-BYTE WRITE
MASTER START
SLAVE
SINGLE-BYTE READ
MASTER START
SLAVE
MULTIPLE-BYTE READ
MASTER START
SLAVE
THIS START IS EITHER A RESTART OR A STOP FOLLOWED BY A START.
are met. Single- or multiple-byte reads/writes are sup-
2
C Digital Input/Output
2
C.
2
C address for the device is 0x1D, followed by
SLAVE ADDRESS + WRITE
SLAVE ADDRESS + WRITE
SLAVE ADDRESS + WRITE
SLAVE ADDRESS + WRITE
Figure 40
2
C address of 0x53 (followed by the R/ W bit)
DD I/O
, the ADXL346 is in I
IL
. With the ALT ADDRESS pin (Pin
IH
IL
)
IH
OL
)
)
OL
)
)
)
ACK
ACK
ACK
ACK
REGISTER ADDRESS
REGISTER ADDRESS
REGISTER ADDRESS
REGISTER ADDRESS
2
C-Bus Specification
DD I/O
DD I/O
2
C mode,
Test Conditions
V
V
V
V
V
f
Figure 39
IN
Table 11
IN
IN
DD I/O
DD I/O
OL
and that
= 1 MHz, V
= V
= 0 V
= V
or GND
ACK
ACK
ACK
ACK
< 2 V, I
≥ 2 V, I
Figure 40. I
DD I/O
OL, max
START
START
.
and
Rev. A | Page 17 of 40
1
1
OL
OL
IN
= 3 mA
= 3 mA
= 2.6 V
SLAVE ADDRESS + READ
SLAVE ADDRESS + READ
2
DATA
DATA
C Device Addressing
Due to communication speed limitations, the maximum output
data rate when using 400 kHz I
a change in the I
at 100 kHz would limit the maximum ODR to 200 Hz. Operation
at an output data rate above the recommended maximum may
result in an undesirable effect on the acceleration data, including
missing samples or additional noise.
If other devices are connected to the same I
operating voltage level of these other devices cannot exceed V
by more than 0.3 V. External pull-up resistors, R
proper I
and User Manual, Rev. 03—19 June 2007, when selecting pull-up
resistor values to ensure proper operation.
ACK
ACK
Min
0.7 × V
−0.1
3
STOP
ACK
ACK
2
C operation. Refer to the UM10204 I
DD I/O
Figure 39. I
DATA
ALT ADDRESS
ADXL346
2
C communication speed. For example, using I
DATA
DATA
SDA
SCL
2
C Connection Diagram (Address 0x53)
CS
ACK
Limit
STOP
Max
0.3 × V
0.1
0.2 × V
400
8
R
NACK
V
1
ACK
P
2
DD I/O
C is 800 Hz and scales linearly with
STOP
DD I/O
DD I/O
R
P
DATA
PROCESSOR
D IN/OUT
D OUT
2
C bus, the nominal
2
C-Bus Specification
P
, are necessary for
NACK
ADXL346
Unit
V
V
μA
μA
V
mV
mA
pF
STOP
DD I/O
2
C