AD9857 Analog Devices, AD9857 Datasheet
AD9857
Manufacturer Part Number
AD9857
Description
CMOS 200 MSPS 14-Bit Quadrature Digital Upconverter
Manufacturer
Analog Devices
Datasheet
1.AD9857.pdf
(31 pages)
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a
PARALLEL
DATA IN
(14-BIT)
PDCLK/
FUD
M
D
E
U
X
14
14
Q
I
TxENABLE
CIC FILTER
INVERSE
INV
CIC
RESET
M
U
X
OVERFLOW
POLATOR
INTER-
FIXED
CIC
(4 )
CONTROL REGISTERS
FUNCTIONAL BLOCK DIAGRAM
PROGRAMMABLE
SERIAL
INTERPOLATOR
PORT
(2
CIC
– 63 )
POWER-
POWER-
DIGITAL
DOWN
DOWN
LOGIC
M
U
X
TUNING
WORD
QUADRATURE
MODULATOR
PROFILE
PS1
GENERAL DESCRIPTION
The AD9857 integrates a high-speed direct-digital synthesizer
(DDS), a high-performance, high-speed 14-bit digital-to-analog
converter (DAC), clock multiplier circuitry, digital filters, and other
DSP functions onto a single chip, to form a complete quadrature
digital upconverter device. The AD9857 is intended to function as
a universal I/Q modulator and agile upconverter, single-tone DDS,
or interpolating DAC for communications applications, where
cost, size, power dissipation, and dynamic performance are critical
attributes.
The AD9857 offers enhanced performance over the industry-
standard AD9856, as well as providing additional features.
The AD9857 is available in a space-saving surface-mount
package and is specified to operate over the extended industrial
temperature range of –40 C to +85 C.
TIMING & CONTROL
SELECT
Quadrature Digital Upconverter
LOGIC
CORE
DDS
PS0
32
M
U
X
SINC FILTER
INVERSE
M
U
X
CMOS 200 MSPS 14-Bit
SINC
INV
MULTIPLIER
(4
CLOCK
LOCK
PLL
– 20 )
M
U
X
14
AD9857
OUTPUT
SCALE
VALUE
8
CONTROL
CLOCK
MODE
INPUT
MODE
14-BIT
DAC
AD9857
DAC_RSET
IOUT
IOUT
REFCLK
REFCLK
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