PNI SENtral - Manual (Page 8)

PNI Sensor Corporation Doc #1018049 R03
SENtral Technical Data Sheet Page 7
Table 2-3: Operating Conditions
Parameter Symbol Min Typical Max Units
Supply Voltage V
DD
1.6 3.3 VDC
Power-On Reset Threshold, V
REG
>V
POR
V
POR
V
REG
– 0.125 VDC
High Level Input Voltage V
IH
0.7*V
DD
V
DD
VDC
Low Level Input Voltage V
IL
0 0.3*V
DD
VDC
High Level Output Current, V
OH
= V
DD
– 0.3V I
OH
-1 mA
Low Level Output Current, V
OL
= 0.3V I
OL
1 mA
Current
Consumption @
1.8 V
DD
Normal Operation
1
100 – 300 µA
Pass-Through State
2
45 µA
Standby State 7 µA
I
2
C Interface
Data Rate
3
Host Bus 3400 kbits/sec
Sensor Bus 1000 kbits/sec
Pass-Through 400 kbits/sec
Decoupling Capacitor (ESR <2

) C
reg
0.33 0.5 1.8 µF
Operating Temperature T
OP
-40 +25 +85 C
Footnotes:
1. SENtral’s current consumption in normal operation is dependent on a number of variables,
including the sensor update rates and the I
2
C sensor bus rate. The range given will be
typical for most customers. There is a trade-off between sensor update rates and current
consumption, as more frequent sensor update rates result in improved motion-tracking
performance, while less frequent sensor update rates result in reduced current
consumption. Faster I
2
C sensor bus rates result in lower current consumption.
2. Pass-Through current consumption assumes SENtral previously was in Standby State,
which is recommended, and a sensor bus rate of 400 kbits/s (Fast mode).
3. SENtral ’s I 2
C Host Interface supports Standard, Fast, Fast Plus, and High Speed Modes.
High Speed Mode (3400 kHz) is supported with a reduced range of V
DD
and bus
capacitance. SENtral ’s I 2
C sensor bus interface supports Standard, Fast, and Fast Plus
Modes. Pass-Through State, which connects the sensor bus and host bus, supports
Standard and Fast Modes.