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EVAL-ADF7012EB4

Description
Multichannel ISM Band FSK/GFSK/OOK/GOOK/ASK Transmitter
File Size576KB,28 Pages
ManufacturerADI
Websitehttps://www.analog.com
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EVAL-ADF7012EB4 Overview

Multichannel ISM Band FSK/GFSK/OOK/GOOK/ASK Transmitter

Multichannel ISM Band
FSK/GFSK/OOK/GOOK/ASK Transmitter
ADF7012
FEATURES
Single-chip, low power UHF transmitter
75 MHz to 1 GHz frequency operation
Multichannel operation using fractional-N PLL
2.3 V to 3.6 V operation
On-board regulator
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
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.
APPLICATIONS
Low cost wireless data transfer
Security systems
RF remote controls
Wireless metering
Secure keyless entry
FUNCTIONAL BLOCK DIAGRAM
PRINTED
INDUCTOR
OSC1
OSC2
CLK
OUT
L1
L2
C
VCO
OOK\ASK
÷CLK
VCO
PA
DV
DD
÷R
PFD/
CHARGE
PUMP
V
DD
RF
OUT
RF
GND
DGND
LDO
REGULATOR
C
REG
OOK\ASK
TxCLK
+FRACTIONAL N
TxDATA
LE
DATA
CLK
FSK\GFSK
Σ-Δ
PLL LOCK
DETECT
BATTERY
MONITOR
MUXOUT
R
SET
04617-0-001
SERIAL
INTERFACE
FREQUENCY
COMPENSATION
CENTER
FREQUENCY
MUXOUT
CE
AGND
Figure 1.
Rev. A
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: 781.461.3113 ©2007–2009 Analog Devices, Inc. All rights reserved.

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