EVAL-ADRF6820 Datasheet, PDF (1/20 Pages) Analog Devices – On-board USB for SPI control

EVAL-ADRF6820 User Guide
UG-652
One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: [phone] • Fax: [phone] • www.analog.com
Evaluating the ADRF6820—a 695 MHz to 2700 MHz Quadrature Demodulator with
Integrated Fractional-N PLL and VCO
FEATURES
Full featured evaluation board for the ADRF6820
On-board USB for SPI control
Dual supply: 5 V and 3.3 V operation
C# software interface for serial port control
EVALUATION KIT CONTENTS
ADRF6820 evaluation board
USB cable
ADDITIONAL EQUIPMENT NEEDED
Analog signal sources
Power supply (6.0 V, 2.5 A)
PC running Windows 98 (2nd ed.), Windows 2000,
Windows ME, Windows XP, or Windows 7
USB 2.0 port, recommended (USB 1.1 compatible)
SOFTWARE NEEDED
ADRF6820 control software (download from ADRF6820
product page)
GENERAL DESCRIPTION
The ADRF6820 is a highly integrated quadrature demodulator and
synthesizer ideally suited for next generation communication
systems. The feature rich device consists of a high linearity,
broadband quadrature demodulator; an integrated fractional-N
phase-locked loop (PLL); and a low phase noise multicore voltage
controlled oscillator (VCO). In addition, the ADRF6820 integrates
a 2:1 RF switch, an on-chip tunable RF balun, a programmable
RF attenuator, and two low dropout (LDO) regulators. This
highly integrated device fits within a small 40-pin, 6 mm ×
6 mm footprint.
This user guide describes the evaluation board for the ADRF6820,
which provides all of the support circuitry required to operate
the ADRF6820 in its various configurations. The application
software used to interface with the device is also described.
The ADRF6820 data sheet, available at www.analog.com, provides
additional information and should be consulted in conjunction
with this user guide when using the evaluation board.
PHOTOGRAPH AND FUNCTIONAL BLOCK DIAGRAM OF EVALUATION BOARD
RFIN0 29
15 14 13
SERIAL PORT
INTERFACE
RFIN1 22
Figure 1.
LDO
2.5V
LDO
VCO
1 19 30 36 31
VPOS_3P3
2 3 8 9 23 25 26 28 38
DC/PHASE
CORRECTION
4 I+
5 _I–
POLYPHASE
FILTER
QUAD
DIVIDER
35 LOIN+
34 ^LOIN–
PLL 39 REFIN
DC/PHASE
CORRECTION
27 33 40 10
DECL1 TO
DECL4
11 21
VPOS_5V
6 Q–
7 Q+
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 20