adf7012 Analog Devices, Inc., adf7012 Datasheet

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adf7012

Manufacturer Part Number
adf7012
Description
Multichannel Ism Band Fsk/gfsk/ook/gook/ask Transmitter
Manufacturer
Analog Devices, Inc.
Datasheet

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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:
Data rates: dc to 179.2 kbps
Low current consumption:
Programmable low battery voltage indicator
24-lead TSSOP
APPLICATIONS
Low cost wireless data transfer
Security systems
RF remote controls
Wireless metering
Secure keyless entry
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.
−16 dBm to +14 dBm, 0.4 dB steps
868 MHz, 10 dBm, 21 mA
433 MHz, 10 dBm, 17 mA
315 MHz, 0 dBm, 10 mA
TxDATA
TxCLK
DATA
DV
D
CLK
GND
LE
DD
OSC1
FSK\GFSK
OOK\ASK
INTERFACE
SERIAL
OSC2
CE
÷CLK
÷R
COMPENSATION
FREQUENCY
FREQUENCY
CENTER
FUNCTIONAL BLOCK DIAGRAM
CLK
OUT
CHARGE
PUMP
PFD/
CPV
DD
+FRACTIONAL N
FSK/GFSK/OOK/GOOK/ASK Transmitter
CP
A
GND
Σ - ∆
Figure 1.
GND
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
PLL LOCK
BATTERY
MONITOR
DETECT
VCO
INDUCTOR
PRINTED
L1
Multichannel ISM Band
L2
OOK\ASK
© 2004 Analog Devices, Inc. All rights reserved.
PA
REGULATOR
C
MUXOUT
REG
LDO
C
VCO
RF
RF GND
C
MUXOUT
R
REG
SET
OUT
V
DD
ADF7012
www.analog.com

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