EVAL-ADF9010EBZ AD [Analog Devices], EVAL-ADF9010EBZ Datasheet - Page 23

• Manufacturer Part Number: EVAL-ADF9010EBZ
• Description: 900 MHz ISM Band Analog RF Front End
• Manufacturer: AD [Analog Devices]

APPLICATIONS INFORMATION
The diagram in Figure 27 shows the ADF9010 in an RFID appli-
cation. The demodulator is driven by the LO
ADF9010. This demodulator produces quadrature baseband
signals that are gained up in the ADF9010 Rx filters. These
filtered analog baseband signals are then digitized by the ADC
on a mixed signal front-end (MxFE) part. The digital signals
are then processed by DSP.
On the transmit side, the MxFE generates quadrature analog
baseband signals, which are upconverted to RF using the inte-
grated PLL and VCO. The modulated RF signals are combined
using a balun and gained up to 30 dBm by a power amplifier.
DEMODULATOR CONNECTION
To receive the back-scattered signals from an RFID tag,
the ADF9010 needs to be used with a high dynamic range
demodulator, such as the
applications. Some extra filtration is provided by the optional
PA MODULE
ADL5382
BALUN
BALUN
that is suitable for RFID
MUXOUT
LO
LO
Rx
Rx
Tx
Tx
Rx
Rx
V
OUT
IN
IN
R
OUT
OUT
OUT
TUNE
IN
QN
SET
CP
IN
QP
IN
N
IP
P
P
N
OUT
CHARGE
PUMP
x pins of the
V
V
R
CM
CM
X
V
FREQUENCY
DETECTOR
DD
PHASE
DGND
Figure 27. Applications Diagram
CORRECTION
CORRECTION
DC OFFSET
DC OFFSET
AV
DD
Rev. 0 | Page 23 of 28
COUNTER
COUNTER
COUNTER
V
P
R
B
A
DV
AGND
DD
shunt capacitors and series inductors. Due to the large self-
blocker, a 100 nF capacitor removes the dc generated by the
self-blocker inherent to RFID systems. This system is used
on the EVAL-ADF9010EBZ1 evaluation board.
N COUNTER
N = BP + A
PRESCALER
ADF9010
P/P + 1
CE
ADL5382
INPUT SHIFT
DEMOD
REGISTER
PLL
24-BIT
ILO
IHI
Figure 28. ADL5382 to ADF9010 Rx Interface
Rx
Rx
Tx
Tx
Tx
Tx
REF
Rx
Rx
OVF
S
S
S
C
C
C
C
C
CLK
DATA
LE
EXT
EXT
EXT
EXT
T
BB
BB
BB
BB
BB
BB
BB
BB
IN
IP
IN
QP
QN
QP
QN
1
2
3
4
IP
IN
1.2nF
MxFE
SHA
SHA
0Ω
0Ω
DAC
DAC
Tx BASEBAND
Rx BASEBAND
AGC
ADC
47pF
DAC
AUX
INPUT SHIFT
AUX
DAC
REGISTER
CONTROL
24-BIT
100nF
DIGITAL
100nF
AUX
DAC
ADF9010
R
ADF9010
R
x
x
IN
IN
C L K
DATA
E N
L E
IP
IN