High Performance ISM Band
ASK/FSK/GFSK Transmitter IC
a
ADF7010
FEATURES
GENERAL DESCRIPTION
Single Chip Low Power UHF Transmitter
902 MHz–928 MHz Frequency Band
On-Chip VCO and Fractional-N PLL
2.3 V–3.6 V Supply Voltage
Programmable Output Power
–16 dBm to +12 dBm, 0.3 dB Steps
Data Rates up to 76.8 kbps
Low Current Consumption
28 mA at 8 dBm Output
The ADF7010 is a low power OOK/ASK/FSK/GFSK UHF
transmitter designed for use in ISM band systems. It contains
an integrated VCO and sigma-delta fractional-N PLL. The
output power, channel spacing, and output frequency are pro-
grammable with four 24-bit registers. The fractional-N PLL
enables the user to select any channel frequency within the U.S.
902 MHz–928 MHz band, allowing the use of the ADF7010 in
frequency hopping systems.
It is possible to choose from the four different modulation
schemes: Binary or Gaussian Frequency Shift Keying (FSK/
GFSK), Amplitude Shift Keying (ASK), or On/Off Keying
(OOK). The device also features a crystal compensation register
that can provide ꢀ1 ppm resolution in the output frequency.
Indirect temperature compensation of the crystal can be accom-
plished inexpensively using this register.
Power-Down Mode (<1 ꢀA)
24-Lead TSSOP Package
APPLICATIONS
Low Cost Wireless Data Transfer
Wireless Metering
Remote Control/Security Systems
Keyless Entry
Control of the four on-chip registers is via a simple 3-wire inter-
face. The devices operate with a power supply ranging from
2.3 V to 3.6 V and can be powered down when not in use.
FUNCTIONAL BLOCK DIAGRAM
C
REG
VCO
CLK
CPV
CP
GND
GND
OUT
DD
C
VCO
OSC1
OSC2
V
DD
OOK/ASK
PA
ꢁ CLK
RF
OUT
VCO
RF
GND
DV
DD
ꢁ R
PFD/
CHARGE
PUMP
D
GND
C
REG
LDO
REGULATOR
OOK/ASK
FSK/GFSK
TxCLK
ꢁ FRACTIONAL N
SIGMA-DELTA
TxDATA
LOCK DETECT
MUXOUT
LE
DATA
CLK
MUXOUT
FREQUENCY
COMPENSATION
SERIAL
INTERFACE
R
SET
CENTER
FREQUENCY
CE
TEST
A
GND
REV. 0
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reliable. However, no responsibility is assumed by Analog Devices for its
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
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© Analog Devices, Inc., 2002