MICRF600
902-928MHz ISM Band Transceiver
Module
RadioWire is a trademark of Micrel, Inc
Power, Connect and Protect is a registered trademark of Micrel, Inc.
Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (
408
) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com
September 2005
M9999-091905
General Description
The MICRF600 is a self-contained frequency shift keying (FSK)
transceiver module, intended for use in half-duplex, bidirectional
RF links. The multi-channeled FSK transceiver module is intended
for UHF radio equipment in compliance with the North American
Federal Communications Commission (FCC) part 15.247 and
249.
The transmitter consists of a fully programmable 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 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 that 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 350kHz. 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, then 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
Module
Features
"Drop in" RF solution
Small size: 11.5x14.1mm
RF tested
FCC Compliant
Low Power
Surface Mountable
Tape & Reel
Digital Bit Synchronizer
Received Signal Strength Indicator (RSSI)
RX and TX power management
Power down function
Register read back function
Applications
Telemetry
Remote metering
Wireless controller
Remote data repeater
Remote control systems
Wireless modem
Wireless security system
Micrel, Inc.
MICRF600
September 2005
2
M9999-091905
Contents
General Description ................................................................................................................................................................ 1
Features .................................................................................................................................................................................. 1
Applications ............................................................................................................................................................................. 1
Contents .................................................................................................................................................................................. 2
RadioWire
RF Module Selection Guide................................................................................................................................. 3
Ordering Information ............................................................................................................................................................... 3
Block Diagram......................................................................................................................................................................... 3
Pin Configuration..................................................................................................................................................................... 4
Pin Description ........................................................................................................................................................................ 4
Absolute Maximum Ratings
(1)
................................................................................................................................................. 5
Operating Ratings
(2)
................................................................................................................................................................ 5
Electrical Characteristics......................................................................................................................................................... 5
Programming........................................................................................................................................................................... 7
General ............................................................................................................................................................................... 7
Writing to the Control Registers in MICRF600 ................................................................................................................... 8
Writing to a Single Register ................................................................................................................................................ 8
Writing to All Registers ....................................................................................................................................................... 8
Writing to n Registers Having Incremental Addresses ....................................................................................................... 9
Reading from the Control Registers in MICRF600 ............................................................................................................. 9
Reading n Registers from MICRF600................................................................................................................................. 9
Programming Interface Timing.............................................................................................................................................. 10
Programming Summary.................................................................................................................................................... 11
Frequency Synthesizer ......................................................................................................................................................... 11
Crystal Oscillator (XCO) ................................................................................................................................................... 11
VCO .................................................................................................................................................................................. 12
Lock Detect ....................................................................................................................................................................... 12
Modes of Operation............................................................................................................................................................... 12
Transceiver Sync/Non-Synchronous Mode ...................................................................................................................... 13
Data Interface ................................................................................................................................................................... 13
Receiver ................................................................................................................................................................................ 13
Front End .......................................................................................................................................................................... 14
Sallen-Key Filters.............................................................................................................................................................. 14
Switched Capacitor Filter.................................................................................................................................................. 14
RSSI.................................................................................................................................................................................. 14
FEE ................................................................................................................................................................................... 15
Bit Synchronizer................................................................................................................................................................ 15
Transmitter ............................................................................................................................................................................ 16
Power Amplifier................................................................................................................................................................. 16
Frequency Modulation ...................................................................................................................................................... 16
Using the XCO-tune Bits ....................................................................................................................................................... 16
Application Circuit Illustration ................................................................................................................................................ 17
Assembling the MICRF600 ................................................................................................................................................... 17
Recommended Reflow Temperature Profile .................................................................................................................... 17
Shock/Vibration during Reflow.......................................................................................................................................... 17
Handassembling the MICRF600....................................................................................................................................... 17
Layout.................................................................................................................................................................................... 18
Recommended Land Pattern............................................................................................................................................ 18
Layout Considerations ...................................................................................................................................................... 18
Package Dimensions ............................................................................................................................................................ 19
Tape Dimensions .................................................................................................................................................................. 19
Micrel, Inc.
MICRF600
September 2005
5
M9999-091905
Absolute Maximum Ratings
(1)
Supply Voltage (V
DD
)...................................................+3.3V
Voltage on any pin (GND = 0V). ..................... -0.3V to 2.7V
Lead Temperature (soldering, 5 sec.)......................+225C
Storage Temperature (T
s
) ............................-30C to +85C
ESD Rating
(3)
..................................................................2kV
Operating Ratings
(2)
Supply voltage (V
IN
) ..................................+2.0V to +2.5V
RF Frequencies.................................902MHz to 928MHz
Data Rate (NRZ) ................................................ <20 kbps
Ambient Temperature (T
A
) .......................20C to +70C
Electrical Characteristics
f
RF
= 915MHz, Data rate = 20kbps, V
DD
= 2.5V; T
A
= 25C,
bold
values indicate 20C< T
A
< +70C, unless noted.
Symbol Parameter
Condition
Min
Typ
Max Units
Power
Supply
2.0
2.5
V
Power Down Current
0.3
A
Standby
Current
280
A
VCO and PLL Section
Tunable with on-chip cap bank
16
MHz
Crystal Oscillator Frequency
Tuning range
-30
+40
ppm
Crystal Initial Tolerance
-10 +10
ppm
Crystal Temperature Tolerance
-10 +10
ppm
Rx 915MHz Rx 915.5MHz
250
s
Rx 903MHz Rx 926MHz
850
s
Rx Tx, same frequency
200
s
Tx Rx, same frequency, time to
good data
300
s
Standby Rx,
1.0
ms
Switch
Time
Standby Tx
1.0
ms
Crystal Oscillator Start-Up Time
XCO_tune=13
750
s
Transmit Section
R
LOAD
= 50
, Pa2-0-111
9
dBm
Output
Power
R
LOAD
= 50
, Pa2-0-001
-7
dBm
Over temperature range
2
dB
Output Power Tolerance
Over power supply range
3
dB
R
LOAD
= 50
, PA2_0: 111
28 mA
Tx Current Consumption
R
LOAD
= 50
, PA2_0: 001
14 mA
Tx Current Consumption Variation
R
LOAD
= 50
, PA2_0: 111
2.5 mA
Binary FSK Frequency Separation
(5)
Limited by receiver BW
20 400
kHz
Data
Rate
(5)
NRZ
0 20
kbps
Occupied
bandwidth
20kbps,
= 10 (100kHz), 20dBc
(RBW=10kHz)
320 kHz
2
nd
Harmonic
-20
dBc
3
rd
Harmonic
-41.2
dBm
Spurious Emission < 902 MHz
-49.2
dBm
Spurious Emission > 928 MHz
FCC part 15, R
LOAD
= 50
-41.2
dBm
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