MICRF610Z datasheet(18/20 Pages) MICREL

18 / 20 page

Micrel, Inc.

MICRF610/MICRF610Z

July 2006

M9999-120205

Application Circuit Illustration

Figure 11. Circuit illustration of MICRF610, LDO and MCU

Figure 11 shows a typical set-up with the MICRF610, a

Low-Drop-Out voltage regulator (LDO)

and a mikro-

controller (MCU). When the MICRF610 and the MCU runs

on the same power supply (min 2.0, max. 2.5V), the IO

can be connected directly to the MCU. If the MCU needs a

higher VDD than the max. specified VDD of the MICRF610

(2.5V), voltage dividers need to be added on the IO lines

not to override the max. input voltage.

Figure 12 shows a recommended voltage divider circuit for

a MCU running at 3.0V and the MICRF610 at 2.5V.

3k3

18k

3k3

18k

3k3

18k

15k

MICRF6xx

MCU

SCLK

DATAIXO

DATACLK

RSSI

SCLK

DATAIXO

DATACLK

RSSI

Figure 12. How to connect MICRF610 (2.5V) and MCU (3.0V)

Assembling the MICRF610

Recommended Reflow Temperature Profile

When the MICRF610 module is being automatically

assembled to a PCB, care must be taken not to expose

the module for temperature above the maximum specified.

Figure 13 shows the recommended reflow temperature

profile.

Figure 13. Recommended Reflow Temperature Reflow

Shock/Vibration during Reflow

The module has several components inside which are

assembled in a reflow process. These components may

reflow again when the module is assembled onto a PCB. It

is therefore important that the module is not subjected to

any mechanical shock or vibration during this process.

Handassembling the MICRF610

It is recommended to use solder paste also during hand

assembling of the module. Because of the module ground

pad on the bottom side, the module will be assembled

most efficient if the heat is being subjected to the bottom

side of the PCB. The heat will be transferred trough the

PCB due the ground vias under the module (see Layout

Considerations). In addition, it is recommended to use a

solder tip on the signal and power pads, to make sure the

solder points are properly melted.

MICRF610Z датащи(PDF) 18 Page - Micrel Semiconductor

MICRF610Z датащи(HTML) 18 Page - Micrel Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

датащи скачать

ссылки URL