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ADF7012BRU-REEL bảng dữ liệu(PDF) 1 Page - Analog Devices

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Multichannel ISM Band
FSK/GFSK/OOK/GOOK/ASK Transmitter
ADF7012
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
© 2004 Analog Devices, Inc. All rights reserved.
FEATURES
Single-chip, low power UHF transmitter
75 MHz to 1 GHz frequency operation
Multichannel operation using Frac-N PLL
2.3 V to 3.6 V operation
On-board regulator—stable performance
Programmable output power:
−16 dBm to +14 dBm, 0.4 dB steps
Data rates: dc to 179.2 kbps
Low current consumption:
868 MHz, 10 dBm, 21 mA
433 MHz, 10 dBm, 17 mA
315 MHz, 0 dBm, 10 mA
Programmable low battery voltage indicator
24-lead TSSOP
APPLICATIONS
Low cost wireless data transfer
Security systems
RF remote controls
Wireless metering
Secure keyless entry
GENERAL DESCRIPTION
The ADF7012 is a low power FSK/GFSK/OOK/GOOK/ASK
UHF transmitter designed for short range devices (SRDs). The
output power, output channels, deviation frequency, and mod-
ulation type are programmable by using four, 32-bit registers.
The fractional-N PLL and VCO with external inductor enable
the user to select any frequency in the 75 MHz to 1 GHz band.
The fast lock times of the fractional-N PLL make the ADF7012
suitable in fast frequency hopping systems. The fine frequency
deviations available and PLL phase noise performance facilitates
narrow-band operation.
There are five selectable modulation schemes: binary frequency
shift keying (FSK), Gaussian frequency shift keying (GFSK),
binary on-off keying (OOK), Gaussian on-off keying (GOOK),
and amplitude shift keying (ASK). In the compensation register,
the output can be moved in <1 ppm steps so that indirect com-
pensation for frequency error in the crystal reference can be
made.
A simple 3-wire interface controls the registers. In power-down,
the part has a typical quiescent current of <0.1 μA.
FUNCTIONAL BLOCK DIAGRAM
SERIAL
INTERFACE
FREQUENCY
COMPENSATION
CENTER
FREQUENCY
OSC1
OSC2
L1
L2
CVCO
CLKOUT CPVDD CPGND
CREG
PRINTED
INDUCTOR
AGND
CE
LE
DATA
CLK
TxDATA
TxCLK
MUXOUT
RF GND
RSET
RFOUT
CREG
VDD
DGND
DVDD
FSK\GFSK
OOK\ASK
OOK\ASK
÷CLK
÷R
PFD/
CHARGE
PUMP
Σ-∆
+FRACTIONAL N
VCO
PLL LOCK
DETECT
MUXOUT
LDO
REGULATOR
BATTERY
MONITOR
PA
Figure 1.


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