P21XXCSR-EVB 데이터 시트보기 (PDF) - Unspecified

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P21XXCSR-EVB

Powerharvester® Chipset Reference Design Evaluation Board

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P21XXCSR-EVB

P21XX Powerharvester® Chipset Reference Design

Evaluation Board

TIMING DIAGRAM

DETAILED COMPONENT DESCRIPTIONS AND OPERATING INSTRUCTIONS

Selecting RF Band

JP2 is used to select the desired band(s) of RF signal to be harvested by the system. There are six

different bands, each with a corresponding SMA connector for attaching an antenna (J1-J6).

Component

Band

Band (MHz)

Center Frequency

(MHz)

J1

GSM-850 uplink

824 – 849

836.5

J2

Europe RFID & GSM-850 downlink 865 – 894

879.5

J3

ISM USA & GSM-900 uplink

925 – 960

904

J4

GSM-1800 uplink

1710 – 1785

1747.5

J5

GSM-1900 uplink

1850 – 1910

1880

J6

WiFi 2.4GHz

2400 – 2500

2450

Selecting Storage Capacitor

JP1 is used to select the storage capacitor used in the system. C1 is a 2200uF electrolytic capacitor. C2

is left unpopulated but is a universal footprint so that a user can add a different capacitor to the board.

C3 is a 50mF super capacitor with low ESR.

P21XXCSR-EVB v1.0 – 2014/7

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