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MICRF505LYML: 产品描述850MHz and 950MHz ISM Band Transceiver; 文件大小478KB，共43页; 制造商Microchip(微芯科技); 官网地址https://www.microchip.com

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MICRF505LYML概述

850MHz and 950MHz ISM Band Transceiver

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MICRF505L

850MHz and 950MHz ISM Band

Transceiver

General Description

The MICRF505 is a true single-chip, frequency shift

keying (FSK) transceiver intended for use in half-

duplex, bidirectional RF links. The multi-channeled

FSK transceiver is intended for UHF radio

equipment in compliance with the with the North

American Federal Communications Commission

(FCC)

part

15.247

and

the

European

Telecommunication Standard Institute (ETSI)

specification, EN300 220.

The transmitter consists of a PLL frequency

synthesizer and power amplifier. The frequency

synthesizer consists of a voltage-controlled oscillator

(VCO), a crystal oscillator, dual modulus prescaler,

programmable frequency dividers, and a phase-

detector. The loop-filter is external for flexibility and

can be a simple passive circuit. The output power of

the power amplifier can be programmed to seven

levels. A lock-detect circuit detects when the PLL is

in lock. In receive mode, the PLL synthesizer

generates the local oscillator (LO) signal. The N, M,

and A values that give the LO frequency are stored

in the N0, M0, and A0 registers.

The receiver is a zero intermediate frequency (IF)

type which makes channel filtering possible with low-

power, integrated low-pass filters. The receiver

consists of a low noise amplifier (LNA) that drives a

quadrature mix pair. The mixer outputs feed two

identical signal channels in phase quadrature. Each

channel includes a pre-amplifier, a third order

Sallen-Key RC low-pass filter that protects the

following switched-capacitor filter from strong

adjacent channel signals, and a limiter. The main

channel filter is a switched-capacitor implementation

of a six-pole elliptic low pass filter. The cut-off

frequency of the Sallen-Key RC filter can be

programmed to four different frequencies: 100kHz,

150kHz, 230kHz, and 340kHz. The I and Q channel

outputs are demodulated and produce a digital data

output. The demodulator detects the relative phase

of the I and the Q channel signal. If the I channel

signal lags behind the Q channel, the FSK tone

frequency is above the LO frequency (data '1'). If the

I channel leads the Q channel, the FSK tone is

below the LO frequency (data '0'). The output of the

receiver is available on the DataIXO pin. A receive

signal strength indicator (RSSI) circuit indicates the

received signal level. All support documentation can

be found on Micrel’s web site at www.micrel.com.

RadioWire®

Features

•

True single chip transceiver

Digital bit synchronizer

Received signal strength indicator (RSSI)

RX and TX power management

Power down function

Reference crystal tuning capabilities

Frequency error estimator

Baseband shaping

Three-wire programmable serial interface

Applications

•

Telemetry

Remote metering

Wireless controller

Remote data repeater

Remote control systems

Wireless modem

Wireless security system

MLF and MicroLead Frame is a registered trademark of Amkor Technologies

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

408

) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

August 2006

M9999-092904

+1 408-944-0800

Micrel

MICRF505LYML

General Description ............................................................................................................................................... 1

Features ................................................................................................................................................................. 1

Applications ............................................................................................................................................................ 1

RadioWire® RF Selection Guide ........................................................................................................................... 4

Ordering Information .............................................................................................................................................. 4

Block Diagram ........................................................................................................................................................ 4

Pin Configuration.................................................................................................................................................... 5

Pin Description ....................................................................................................................................................... 5

(1)

Absolute Maximum Ratings ................................................................................................................................ 6

(2)

Operating Ratings ............................................................................................................................................... 6

(4)

Electrical Characteristics ..................................................................................................................................... 6

Programming.......................................................................................................................................................... 9

Writing to the control registers in MICRF505 ....................................................................................................... 10

Writing to a Single Register ................................................................................................................................. 10

Writing to All Registers......................................................................................................................................... 11

Writing to n Registers having Incremental Addresses ......................................................................................... 11

Writing to n Registers having Non-Incremental Addresses ................................................................................. 12

Reading from the control registers in MICRF505 ................................................................................................ 12

Programming interface timing .............................................................................................................................. 12

Power on Reset.................................................................................................................................................... 13

Programming summary........................................................................................................................................ 14

Frequency Synthesizer ........................................................................................................................................ 15

Crystal Oscillator (XCO)

.................................................................................................................................... 16

VCO......................................................................................................................................................................

Charge Pump......................................................................................................................................................

PLL Filter.............................................................................................................................................................

Lock Detect

......................................................................................................................................................... 18

Modes of Operation

........................................................................................................................................... 18

Low Dropout Regulator ........................................................................................................................................ 19

Transceiver Sync/Non-Synchronous Mode ......................................................................................................... 20

Data Interface....................................................................................................................................................... 20

Receiver ............................................................................................................................................................... 21

Front End

............................................................................................................................................................ 21

Sallen-Key Filters

............................................................................................................................................... 21

Switched Capacitor Filter

.................................................................................................................................. 22

RSSI

..................................................................................................................................................................... 22

FEE

...................................................................................................................................................................... 23

Bit Synchronizer.................................................................................................................................................

Transmitter ........................................................................................................................................................... 25

Power Amplifier..................................................................................................................................................

Modulator............................................................................................................................................................

Using the XCO-tune Bits ...................................................................................................................................... 29

Typical Application ............................................................................................................................................... 31

MICRF505LBML/YML Land pattern..................................................................................................................... 32

Layout Considerations ......................................................................................................................................... 33

August 2006

M9999-092904

+1 408-944-0800

Micrel

MICRF505LYML

Package Information MICRF505LBML ................................................................................................................ 34

Package Information MICRF505YML .................................................................................................................. 35

Overview of programming bit ............................................................................................................................... 36

Table 1: Detailed description of programming bit ................................................................................................ 36

Table 2: Main Mode bit......................................................................................................................................... 41

Table 3: Synchronizer mode bit ........................................................................................................................... 41

Table 4: Modulation bit......................................................................................................................................... 41

Table 5: Prefilter bit .............................................................................................................................................. 41

Table 6: Power amplifier bit ................................................................................................................................. 42

Table 7:Generation of

Bitrate_clk, BitSync_clk

and

Mod_clk.

............................................................................. 42

Table 8: Test signals ............................................................................................................................................ 42

Table 10: Frequency Error Estimation control bit ................................................................................................ 43

Table 11: Frequency Error Estimation control bit, cont........................................................................................ 43

August 2006

M9999-092904

+1 408-944-0800

MICRF505LYML

MICRF505LYML概述

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