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ADS8328IPWG4 ,2.7V~5.5V, 16 bit 500KSPS Serial ADC w 2-to-1 MUX 16-TSSOP -40 to 85.2 Submit Documentation Feedback 2006–2011, Texas Instruments IncorporatedProduct Folder Link(s): A ..
ADS8328IPWG4 ,2.7V~5.5V, 16 bit 500KSPS Serial ADC w 2-to-1 MUX 16-TSSOP -40 to 85FEATURES APPLICATIONS• Communications• 2.7-V to 5.5-V Analog Supply, Low Power:• Transducer Interfa ..
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AD9744ARU
14-Bit, 165 MSPS TxDAC D/A Converter
REV.0
14-Bit, 165 MSPS
TxDAC D/A Converter
FUNCTIONAL BLOCK DIAGRAM
3.3VRSET
0.1�F
CLOCK
SLEEP
DIGITAL DATA INPUTS (DB13DB0)
FEATURES
High-Performance Member of Pin-Compatible
TxDAC Product Family
Excellent Spurious-Free Dynamic Range Performance
SFDR to Nyquist:
83 dBc @ 5 MHz Output
80 dBc @ 10 MHz Output
73 dBc @ 20 MHz Output
SNR @ 5 MHz Output, 125 MSPS: 77 dB
Two’s Complement or Straight Binary Data Format
Differential Current Outputs: 2 mA to 20 mA
Power Dissipation: 135 mW @ 3.3 V
Power-Down Mode: 15 mW @ 3.3 V
On-Chip 1.20 V Reference
CMOS-Compatible Digital Interface
Package: 28-Lead SOIC and TSSOP Packages
Edge-Triggered Latches
APPLICATIONS
Wideband Communication Transmit Channel:
Direct IF
Base Stations
Wireless Local Loop
Digital Radio Link
Direct Digital Synthesis (DDS)
Instrumentation
PRODUCT DESCRIPTIONThe AD9744 is a 14-bit resolution, wideband, third generation
member of the TxDAC series of high-performance, low power
CMOS digital-to-analog converters (DACs). The TxDAC family,
consisting of pin-compatible 8-, 10-, 12-, and 14-bit DACs, is
specifically optimized for the transmit signal path of communica-
tion systems. All of the devices share the same interface options,
small outline package, and pinout, providing an upward or down-
ward component selection path based on performance, resolution,
and cost. The AD9744 offers exceptional ac and dc performance
while supporting update rates up to 165 MSPS.
The AD9744’s low power dissipation makes it well suited for
portable and low power applications. Its power dissipation can be
further reduced to a mere 60 mW with a slight degradation in
performance by lowering the full-scale current output. Also, a
power-down mode reduces the standby power dissipation to
approximately 15 mW. A segmented current source architecture
is combined with a proprietary switching technique to reduce
spurious components and enhance dynamic performance. Edge-
triggered input latches and a 1.2 V temperature compensated
band gap reference have been integrated to provide a complete
monolithic DAC solution. The digital inputs support 3 V
CMOS logic families.
PRODUCT HIGHLIGHTSThe AD9744 is the 14-bit member of the pin-compatible
TxDAC family that offers excellent INL and DNL
performance.Data input supports two’s complement or straight binary
data coding.High-speed, single-ended CMOS clock input supports
165 MSPS conversion rate.Low power: Complete CMOS DAC function operates on
135 mW from a 3.0 V to 3.6 V single supply. The DAC
full-scale current can be reduced for lower power operation,
and a sleep mode is provided for low power idle periods.On-chip voltage reference: The AD9744 includes a 1.2 V
temperature-compensated band gap voltage reference.Industry standard 28-lead SOIC and TSSOP packages.
TxDAC is a registered trademark of Analog Devices, Inc.
*. Patent Numbers 5568145, 5689257, and 5703519.
AD9744
DC SPECIFICATIONSNOTESMeasured at IOUTA, driving a virtual ground.Nominal full-scale current, IOUTFS, is 32 times the IREF current.An external buffer amplifier with input bias current <100 nA should be used to drive any external load.Measured at fCLOCK = 25 MSPS and fOUT = 1.0 MHz.Measured as unbuffered voltage output with IOUTFS = 20 mA and 50 W RLOAD at IOUTA and IOUTB, fCLOCK = 100 MSPS and fOUT = 40 MHz.±5% Power supply variation.
Specifications subject to change without notice.
(TMIN to TMAX, AVDD = 3.3 V, DVDD = 3.3 V, IOUTFS = 20 mA, unless otherwise noted.)
-SPECIFICATIONS
AD9744Total Harmonic Distortion
NOTESMeasured single-ended into 50 W load.Output noise is measured with a full-scale output set to 20 mA with no conversion activity. It is a measure of the thermal noise only.Noise spectral density is the average noise power normalized to a 1 Hz bandwidth, with the DAC converting and producing an output tone.
Specifications subject to change without notice.
DYNAMIC SPECIFICATIONS
(TMIN to TMAX , AVDD = 3.3 V, DVDD = 3.3 V, IOUTFS = 20 mA, Differential Transformer Coupled
Output, 50 � Doubly Terminated, unless otherwise noted.)
AD9744
CAUTIONESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the AD9744 features proprietary ESD protection circuitry, permanent damage may occur on
devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
ABSOLUTE MAXIMUM RATINGS*Storage Temperature
*Stresses above those listed under Absolute Maximum Ratings may cause perma
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum ratings
for extended periods may effect device reliability.
ORDERING GUIDE*R = Small Outline IC; RU = Thin Shrink Small Outline Package
THERMAL CHARACTERISTICS
Thermal Resistance28-Lead 300-Mil SOICJA= 71.4∞C/W
28-Lead TSSOPJA= 97.9∞C/W
Figure 1.Timing Diagram
DIGITAL SPECIFICATIONS
(TMIN to TMAX , AVDD = 3.3 V, DVDD = 3.3 V, IOUTFS = 20 mA, unless otherwise noted.)
PIN CONFIGURATION
PIN FUNCTION DESCRIPTIONS
