High Performance ISM Band
ASK/FSK/GFSK Transmitter IC
ADF7011
FEATURES
GENERAL DESCRIPTION
Single Chip Low Power UHF Transmitter
Frequency Band
433 MHz to 435 MHz
The ADF7011 is a low power OOK/ASK/FSK/GFSK UHF
transmitter designed for use in ISM band systems. It contains
and integrated VCO and Σ-∆ fractional-N PLL. The output
power, channel spacing, and output frequency are program-
mable with four 24-bit registers. The fractional-N PLL enables
the user to select any channel frequency within the European
433 MHz and 868 MHz bands, allowing the use of the ADF7011
in frequency hopping systems. The fractional-N also allows the
transmitter to operate in the less congested sub-bands of the
868 MHz to 870 MHz SRD band.
868 MHz to 870 MHz
On-Chip VCO and Fractional-N PLL
2.3 V to 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
29 mA at +10 dBm at 433.92 MHz
Power-Down Mode (<1 ꢀA)
24-Lead TSSOP Package Hooks to External VCO for
< 1.4 GHz Operation
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.
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
CP
VCO
IN
OUT
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
ADF7011
SERIAL
INTERFACE
R
SET
CENTER
FREQUENCY
CE
TEST
A
GND
REV. 0
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