参数资料
型号: AS5245 DB
厂商: ams
文件页数: 22/32页
文件大小: 0K
描述: BOARD DEMO AS5245
标准包装: 1
传感器类型: 磁性,旋转位置
传感范围: 360°
接口: USB
电源电压: 5V USB 或 9V
嵌入式: 是,MCU,8 位
已供物品: 板,线缆
已用 IC / 零件: AS5245
AS5245
Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
9.3 3.3V / 5V Operation
The AS5245 operates either at 3.3V ±10% or at 5V ±10%. This is made possible by an internal 3.3V Low-Dropout (LDO) Voltage regulator. The
internal supply voltage is always taken from the output of the LDO, meaning that the internal blocks are always operating at 3.3V.
For 3.3V operation, the LDO must be bypassed by connecting VDD3V3 with VDD5V (see Figure 15) .
For 5V operation, the 5V supply is connected to pin VDD5V, while VDD3V3 (LDO output) must be buffered by a 1...10μF capacitor, which is
supposed to be placed close to the supply pin (see Figure 15) .
Note: The VDD3V3 output is intended for internal use only. It must not be loaded with an external load.
The output voltage of the digital interface I/O’s corresponds to the voltage at pin VDD5V, as the I/O buffers are supplied from this pin.
Figure 15. Connections for 5V / 3.3V Supply Voltages
5V Operation
1... 10μF
3.3V Operation
100n
VDD5V
VDD3V3
LDO
Internal
VDD
VDD5V
VDD3V3
LDO
Internal
VDD
100n
DO
DO
+
4.5 - 5.5V
I
N
T
E
R
F
A
C
E
PWM
CLK
CSn
+
3.0 - 3.6V
I
N
T
E
R
F
A
C
E
PWM
CLK
CSn
VSS
PDIO
VSS
PDIO
A buffer capacitor of 100nF is recommended in both cases close to pin VDD5V. Note that pin VDD3V3 must always be buffered by a capacitor. It
must not be left floating, as this may cause an instable internal 3.3V supply voltage, which may lead to larger than normal jitter of the measured
angle.
www.austriamicrosystems.com/AS5245
Revision 1.5
21 - 31
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