AD9852ASVZ Analog Devices Inc, AD9852ASVZ Datasheet - Page 4

• Manufacturer Part Number: AD9852ASVZ
• Description: IC DDS SYNTHESIZER CMOS 80-TQFP
• Manufacturer: Analog Devices Inc

Specifications of AD9852ASVZ

• Resolution (bits): 12 b
• Master Fclk: 300MHz
• Tuning Word Width (bits): 48 b
• Voltage - Supply: 3.14 V ~ 3.47 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 80-TQFP Exposed Pad, 80-eTQFP, 80-HTQFP, 80-VQFP
• Transmitting Current: 815mA
• Rf Ic Case Style: TQFP
• No. Of Pins: 80
• Supply Voltage Range: 3.135V To 3.465V
• Operating Temperature Range: -40°C To +85°C
• Msl: MSL 3 - 168 Hours
• Frequency Max: 300MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AD9852/PCBZ - BOARD EVAL FOR AD9852
• Lead Free Status / Rohs Status: Compliant

AD9852
GENERAL DESCRIPTION
The AD9852 digital synthesizer is a highly integrated device
that uses advanced DDS technology, coupled with an internal
high speed, high performance D/A converter to form a digitally
programmable, agile synthesizer function. When referenced to
an accurate clock source, the AD9852 generates a highly stable
frequency-, phase-, and amplitude-programmable cosine output
that can be used as an agile LO in communications, radar, and
many other applications. The innovative high speed DDS core
of the AD9852 provides 48-bit frequency resolution (1 μHz
tuning resolution with 300 MHz SYSCLK). Maintaining 17 bits
ensures excellent SFDR.
The circuit architecture of the AD9852 allows the generation of
output signals at frequencies up to 150 MHz, which can be
digitally tuned at a rate of up to 100 million new frequencies
per second. The (externally filtered) cosine wave output can be
converted to a square wave by the internal comparator for agile
clock generator applications. The device provides two 14-bit
phase registers and a single pin for BPSK operation.
For higher-order PSK operation, the I/O interface can be used
for phase changes. The 12-bit cosine DAC, coupled with the
innovative DDS architecture, provides excellent wideband and
narrow-band output SFDR. When configured with the
comparator, the 12-bit control DAC facilitates static duty cycle
control in the high speed clock generator applications.
The 12-bit digital multiplier permits programmable amplitude
modulation, on/off output shaped keying, and precise amplitude
control of the cosine DAC output. Chirp functionality is also
included for wide bandwidth frequency sweeping applications.
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The AD9852 programmable 4× to 20× REFCLK multiplier cir-
cuit internally generates the 300 MHz system clock from a lower
frequency external reference clock. This saves the user the expense
and difficulty of implementing a 300 MHz system clock source.
Direct 300 MHz clocking is also accommodated with either single-
ended or differential inputs. Single-pin, conventional FSK and the
enhanced spectral qualities of ramped FSK are supported. The
AD9852 uses advanced 0.35 μ CMOS technology to provide this
high level of functionality on a single 3.3 V supply.
The AD9852 is pin-for-pin compatible with the
tone synthesizer. The AD9852 is specified to operate over the
extended industrial temperature range of −40°C to +85°C.
OVERVIEW
The AD9852 digital synthesizer is a highly flexible device that
addresses a wide range of applications. The device consists of
an NCO with a 48-bit phase accumulator, a programmable
reference clock multiplier, an inverse sinc filter, a digital
multiplier, two 12-bit/300 MHz DACs, a high speed analog
comparator, and an interface logic. This highly integrated
device can be configured to serve as a synthesized LO agile
clock generator and FSK/BPSK modulator. The theory of
operation for the functional blocks of the device and a technical
description of the signal flow through a DDS device is provided
by Analog Devices, Inc., in the tutorial
Digital Signal
applications information for a variety of digital synthesis
implementations.
Synthesis. The tutorial also provides basic
A Technical Tutorial on
AD9854
single-