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NSE-5310

Data Sheet - D e t a i l e d D e s c r i p t i o n

7.1 Using 3.3V or 5V Operation

For 3.3V operation: Bypass the voltage regulator (LDO) by connecting VDD3V3 with VDD5V.

For 5V operation: Connect the 5V supply to pin VDD5V. VDD3V3 (LDO output) must be buffered by a 2.2µF to 10µF capacitor placed close to

the supply pin.

In either case, a buffer capacitor of 100nF close to pin VDD5V is recommended.

Note: 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 volt-

age which may lead to larger than normal jitter of the measured position.

The 3V3 output is intended for internal use only. It must not be loaded with an external load.

The output voltage of the digital interface I/Os corresponds to the voltage at pin VDD5V, as the I/O buffers are supplied from this pin.

Figure 6. Connections for 3.3V or 5V Supply Voltage

Internal

VDD

LDO

I

N

T

E

R

F

A

C

E

VSS

VDD5V

VDD3V3

3.0 - 3.6V

+

DO

PWM

CLK

CSn

Prog

100n

3.3V Operation

Internal

VDD

LDO

I

N

T

E

R

F

A

C

E

VSS

VDD5V

VDD3V3

100n

4.5 - 5.5V

+

1... 10µF

DO

PWM

CLK

CSn

Prog

5V Operation