AD6623S/PCB Analog Devices Inc, AD6623S/PCB Datasheet - Page 41

• Manufacturer Part Number: AD6623S/PCB
• Description: BOARD EVAL SGNL PROCESSOR AD6623
• Manufacturer: Analog Devices Inc

Specifications of AD6623S/PCB

• Rohs Status: RoHS non-compliant
• Module/board Type: Evaluation Board
• For Use With/related Products: AD6623
• Lead Free Status / Rohs Status: Not Compliant

Read Pseudocode
Void Read_Micro(ext_address);
Main()
{
/* This code shows the reading of the NCO
frequency register using the Read_Micro
function defined above. The variable
address is the External Address A[2:0]
Internal Address = 0x102, channel 1
*/
/*Holding registers for NCO byte wide
access data*/
int d3, d2, d1, d0;
/*NCO frequency word (32 bits wide)*/
/*write Chan */
Write_Micro(7, 0x01);
/*write Addr*/
Write_Micro(6,0x02);
/*read Byte 0, all data is moved from the
Internal Registers to the interface
registers on this access, thus Byte 0 must
be accessed first for the other Bytes to be
valid*/
d0=Read_Micro(0) & 0xFF;
/*read Byte 1*/
d1=Read_Micro(1) & 0xFF;
/*read Byte 2*/
d2=Read_Micro(2) & 0xFF;
/*read Byte 0 */
d3=Read_Micro(3) & 0xFF;
}
AD6623 EVALUATION PCB AND SOFTWARE
Analog Devices offers a fully populated printed circuit board and
necessary software to evaluate the AD6623 performance. The
software loads the AD6623 program registers, loads RCF (RAM
Coefficient Filter) coefficients and programs the onboard FPGA
and microcontroller. Designers should contact their local Analog
Devices product distributor for ordering information.
REV. A
EXTERNAL CLK IN
INPUT/OUTPUT
XTAL OSC.
HEADERS
CLK
USER PARALLEL
DATA IN TO PLD
INPUT DATA
HEADERS
TRANSCEIVER
CLK BUFFERS
74VCX16500
DUT
DAC
OT
IOT
FOUR CHANNELS
SERIAL DATA IN
Figure 39. AD6623AS Evaluation Board
MICROCONVERTER
AD6623AS
MICROPORT
FLEX PLD
ADuC812
ALTERA
TSP
–41–
FRAME IN/OUT
SERIAL CLK IN/OUT
MICROPORT I/O
The PCB and software have been designed for maximum
flexibility to accommodate many different applications with
minimum need of external devices. Please refer to the AD6623
Evaluation Board Manual for detailed information.
FIR filter design is an extremely important consideration in UMTS
(Universal Mobile Telecommunications System), wideband
CDMA and other sophisticated data transmission schemes. Trans-
mitted signals must comply with channel specifications to assure
non-interference with neighboring signal channels as well as
minimizing inter-symbol interference. The AD6623 FIR filter
software was designed to fulfill these goals. The latest AD6623
evaluation board and FIR filter software are both available from
the Analog Devices web site at http://www.analog.com/
techSupport/DesignTools/evaluationBoards/Ad6623.html
Additional features of the AD6623 PCB kit:
• Onboard 14-bit, 175 MSPS Interpolating TxDAC
• On board voltage regulation requires only a single 9 V, 1 Amp
• Digital outputs can be cascaded to a second AD6623 PCB for
• Onboard “can type” crystal clock or BNC for external single-
• AD6623 software utilizes the serial port of a Personal Computer for
• High quality, multi-layer PCB
• Comprehensive instruction manual complete with schematics,
HEADER
(AD9772A) for analog reconstruction of digital outputs.
(Appropriate external anti-alias filter may be required.)
external power supply to power all devices with 2.5 V, 3.3 V
and 5 V.
up to 8 output channels from a single DAC.
ended clock oscillator. CLK buffers are provided for every
driven device
board programming—supports Windows
parts layout diagrams, illustrations.
RS-232 LINE DRIVER
TRANSCEIVER
OUTPUT DATA
74VCX16500
ADM3222
18 BITS
LM317
2.5V
HEADERS
OUTPUT
SERIAL PORT
POWER SUPPLY
EXTERNAL 9V
OF PC
LM317
3.3V
™
95, 98, NT and 2000.
14 BITS
TO DAC
AD9772
A DAC
AD6623
LM317
5V