AD9144BCPZ View Datasheet(PDF) - Analog Devices
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AD9144BCPZ Datasheet PDF : 125 Pages
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Data Sheet
Quad, 16-Bit, 2.8 GSPS, TxDAC+®
Digital-to-Analog Converter
AD9144
FEATURES
Supports input data rate >1 GSPS
Proprietary low spurious and distortion design
6-carrier GSM IMD = 77 dBc at 75 MHz IF
SFDR = 82 dBc at dc IF, −9 dBFS
Flexible 8-lane JESD204B interface
Support quad or dual DAC mode at 2.8 GSPS
Multiple chip synchronization
Fixed latency
Data generator latency compensation
Selectable 1×, 2×, 4×, 8× interpolation filter
Low power architecture
Input signal power detection
Emergency stop for downstream analog circuitry protection
Transmit enable function allows extra power saving
High performance, low noise phase-locked loop (PLL) clock
multiplier
Digital inverse sinc filter
Low power: 1.6 W at 1.6 GSPS, 1.7 W at 2.0 GSPS,
full operating conditions
88-lead LFCSP with exposed pad
APPLICATIONS
Wireless communications
3G/4G W-CDMA base stations
Wideband repeaters
Software defined radios
Wideband communications
Point-to-point
Local multipoint distribution service (LMDS) and
multichannel multipoint distribution service (MMDS)
Transmit diversity, multiple input/multiple output (MIMO)
Instrumentation
Automated test equipment
GENERAL DESCRIPTION
The AD9144 is a quad, 16-bit, high dynamic range digital-to-
analog converter (DAC) that provides a maximum sample rate
of 2.8 GSPS, permitting a multicarrier generation up to the
Nyquist frequency. The DAC outputs are optimized to interface
seamlessly with the ADRF6720 analog quadrature modulator
(AQM) from Analog Devices, Inc. An optional 3-wire or 4-wire
serial port interface (SPI) provides for programming/readback
of many internal parameters. Full-scale output current can be
programmed over a typical range of 13.9 mA to 27.0 mA. The
AD9144 is available in an 88-lead LFCSP.
TYPICAL APPLICATION CIRCUIT
QUAD MOD
ADRF6720
LPF
DAC
0°/90° PHASE
SHIFTER
DAC
JESD204B
SYNCOUTx±
SYSREF±
LO_IN MOD_SPI
QUAD MOD
ADRF6720
LPF
AD9144
QUAD
DAC
DAC
0°/90° PHASE
SHIFTER
DAC
JESD204B
SYNCOUTx±
LO_IN MOD_SPI
CLK± DAC
SPI
Figure 1.
PRODUCT HIGHLIGHTS
1. Greater than 1 GHz, ultrawide complex signal bandwidth
enables emerging wideband and multiband wireless
applications.
2. Advanced low spurious and distortion design techniques
provide high quality synthesis of wideband signals from
baseband to high intermediate frequencies.
3. JESD204B Subclass 1 support simplifies multichip
synchronization in software and hardware design.
4. Fewer pins for data interface width with a serializer/
deserializer (SERDES) JESD204B eight-lane interface.
5. Programmable transmit enable function allows easy design
balance between power consumption and wake-up time.
6. Small package size with 12 mm × 12 mm footprint.
Rev. B
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