AD9726BSVZ Datasheet, PDF (1/24 Pages) Analog Devices – 16-Bit, 400 MSPS Digital-to-Analog Converter

FEATURES
Dynamic performance
SFDR ≥ 78 dBc at fOUT = 20 MHz
IMD ≥ 82 dBc at fOUT = 70 MHz
ACLR ≥ 76 dBc at fOUT = 70 MHz
NSD ≤ −160 dB/Hz at fOUT = 70 MHz
Precision calibrated linearity
DNL ≤ ±0.5 LSB at +25°C
INL ≤ ±1.0 LSB at +25°C
THD ≤ −95 dB at fOUT = 1 MHz
LVDS inputs with internal 100 Ω terminations
Automatic data/clock timing synchronization
Single data rate or double data rate capable
Differential current outputs
Internal precision reference
Operates on 2.5 V and 3.3 V supplies
Extended industrial temperature range
Thermally enhanced, 80-lead, RoHS-compliant
TQFP_EP package
APPLICATIONS
Instrumentation
Test equipment
Waveform synthesis
Communications systems
GENERAL DESCRIPTION
The AD9726 is a 16-bit digital-to-analog converter (DAC)
that offers leading edge performance at conversion rates of up
to 400 MSPS. The device uses low voltage differential signaling
(LVDS) inputs and includes internal 100 Ω terminations. The
analog output can be single-ended or differential current. An
internal precision reference is included.
The AD9726 also features synchronization logic to monitor and
optimize the timing between incoming data and the sample clock.
This reduces system complexity and simplifies timing require-
ments. An LVDS clock output is also available to drive an external
data pump in either single data rate (SDR) or double data rate
(DDR) mode.
All device operation is fully programmable using the flexible
serial port interface (SPI). The AD9726 is also fully functional
in its default state for applications without a controller.
16-Bit, 400 MSPS
Digital-to-Analog Converter
AD9726
FUNCTIONAL BLOCK DIAGRAM
CLK+
CLK–
DCLK_OUT+
DCLK_OUT–
CLOCK DISTRIBUTION
AND CONTROL
SPI
LVDS OUTPUT
DRIVER
CSB
SCLK
SDIO
SDO
RESET
DB[15]+
DB[15]–
DB[0]+
DB[0]–
DCLK_IN+
DCLK_IN–
CALIBRATION
MEMORY
16-BIT
DAC
INTERNAL
REFERENCE
Figure 1.
.
IOUTA
IOUTB
REFIO
FSADJ
PRODUCT HIGHLIGHTS
1. A unique combination of precision and performance
makes the AD9726 equally suited to applications with
demanding frequency domain or demanding time domain
requirements.
2. Nonvolatile factory calibration assures a highly linear
transfer function. Internal logic offers on demand self-
calibration for linearity even at extended operating
temperatures.
3. Proprietary architecture minimizes data dependent,
discrete mixing spurs and offers enhanced dynamic
performance over a wide range of output frequencies.
High input data rates create a very high frequency
synthesis bandwidth.
4. The fully automatic, transparent synchronizer maintains
optimized timing between clock and data in real time and
offers programmable control options for added flexibility.
5. Full-scale output current is external resistor programmable.
Rev. B
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