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ADF7010
High Performance ISM Band
ASK/FSK/GFSK Transmitter IC
FEATURES
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
Power-Down Mode (<1 H9262A)
24-Lead TSSOP Package
APPLICATIONS
Low Cost Wireless Data Transfer
Wireless Metering
Remote Control/Security Systems
Keyless Entry
FUNCTIONAL BLOCK DIAGRAM
VCO
OOK/ASK
LDO
REGULATOR
MUXOUT
LOCK DETECT
SERIAL
INTERFACE
FREQUENCY
COMPENSATION
CENTER
FREQUENCY
H11548 FRACTIONAL N
SIGMA-DELTA
OOK/ASK
PFD/
CHARGE
PUMP
H11548 R
H11548 CLK
PA
FSK/GFSK
OSC1 OSC2
CLK
OUT
CPV
DD
CP
GND
C
REG
C
VCO
VCO
GND
V
DD
RF
OUT
RF
GND
C
REG
R
SET
MUXOUT
TESTA
GND
CE
CLK
DATA
LE
TxDATA
TxCLK
D
GND
DV
DD
GENERAL DESCRIPTION
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 H110061 ppm resolution in the output frequency.
Indirect temperature compensation of the crystal can be accom-
plished inexpensively using this register.
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.