ADF9010 Datasheet, PDF (1/28 Pages) Analog Devices – 900 MHz ISM Band Analog RF Front End

FEATURES
840 MHz to 960 MHz ISM bands
Rx baseband analog low-pass filtering and PGA
Integrated RF Tx upconverter
Integrated integer-N PLL and VCO
Integrated Tx PA preamplifier
Differential fully balanced architectures
3.3 V supply
Low power mode: <1 mA power-down current
Programmable Rx LPF cutoff
330 kHz, 880 kHz, 1.76 MHz, and bypass
Rx PGA gain settings: 3 dB to 24 dB in 3 dB steps
Low noise BiCMOS technology
48-lead, 7 mm × 7 mm LFCSP
APPLICATIONS
900 MHz RFID readers
Unlicensed band 900 MHz applications
GENERAL DESCRIPTION
The ADF9010 is a fully integrated RF Tx modulator and Rx
analog baseband front end that operates in the frequency
range from 840 MHz to 960 MHz. The receive path consists
of a fully differential I/Q baseband PGA, low-pass filter, and
general signal conditioning before connecting to an Rx ADC
for baseband conversion. The Rx LPF gain ranges from 3 dB
to 24 dB, programmable in 3 dB steps. The Rx LPF features
four programmable modes with cutoff frequencies of 330 kHz,
880 kHz, and 1.76 MHz, or the filter can be bypassed if necessary.
900 MHz ISM Band
Analog RF Front End
ADF9010
Rx_INIP
Rx_ININ
Rx_CM
FUNCTIONAL BLOCK DIAGRAM
R_XV_DD AV_DD
V_P
DV_DD
CE
V_CM
ADF9010
DC OFFSET
V_CM CORRECTION
Rx_BBIP
Rx_BBIN
OVF
Rx_INQP
Rx_INQN
MUXOUT
R_SET
CP
V_TUNE
LO_OUTP
LO_OUTN
Tx_OUTP
Tx_OUTN
DC OFFSET
CORRECTION
CHARGE
PUMP
PHASE
FREQUENCY
DETECTOR
R
COUNTER
B
COUNTER
A
COUNTER
÷4
QUADRATURE
PHASE SPLITTER
24-BIT
INPUT SHIFT
REGISTER
PLL
N COUNTER
N = BP + A
PRESCALER
P/P + 1
DGND
AGND
Figure 1.
Rx_BBQP
Rx_BBQN
S_CLK
S_DATA
S_LE
REF_IN
C_EXT1
C_EXT2
C_EXT3
C_EXT4
C_T
Tx_BBIP
Tx_BBIN
Tx_BBQP
Tx_BBQN
The transmit path consists of a fully integrated differential Tx
direct I/Q upconverter with a high linearity PA driver amplifier.
It converts a baseband I/Q signal to an RF carrier-based signal
between 840 MHz and 960 MHz. The highly linear transmit
signal path ensures low output distortion.
Complete local oscillator (LO) signal generation is integrated
on chip, including the integer-N synthesizer and VCO, which
generate the required I and Q signals for transmit I/Q upconver-
sion. The LO signal is also available at the output to drive an
external RF demodulator. Control of all the on-chip registers
is via a simple 3-wire serial interface. The device operates with a
power supply ranging from 3.15 V to 3.45 V and can be powered
down when not in use.
Rev. 0
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