Data Sheet
AD9081
MxFE Quad, 16-Bit, 12 GSPS RF DAC and Quad, 12-Bit, 4 GSPS RF ADC
► Low latency loopback mode (receive datapath data can be
routed to the transmit datapaths)
► ADC clock driver with selectable divide ratios
► Power amplifier downstream protection circuitry
► On-chip temperature monitoring unit
► Flexible GPIO pins
FEATURES
► Flexible, reconfigurable common platform design
► 4 DACs and 4 ADCs (4D4A)
► Supports single, dual, and quad band
► Datapaths and DSP blocks are fully bypassable
► DAC to ADC sample rate ratios of 1, 2, 3, and 4
► On-chip PLL with multichip synchronization
► External RFCLK input option for off-chip PLL
► Maximum DAC sample rate up to 12 GSPS
► Maximum data rate up to 12 GSPS using JESD204C
► Useable analog bandwidth to 8 GHz
► Maximum ADC sample rate up to 4 GSPS
► Maximum data rate up to 4 GSPS using JESD204C
► 7.5 GHz analog input full power bandwidth (−3 dB)
► ADC ac performance at 4 GSPS, input at −2.7 GHz, −1 dBFS
► Full-scale input voltage: 1.4 V p-p
► TDD power savings option and sharing ADCs
► SERDES JESD204B/JESD204C interface, 16 lanes up to
24.75 Gbps
► 8 lanes JESD204B/C transmitter (JTx) and 8 lanes
JESD204B/C receiver (JRx)
► JESD204B compliance with the maximum 15.5 Gbps
► JESD204C compliance with the maximum 24.75 Gbps
► Supports real or complex digital data (8-, 12-, 16-, or 24-bit)
► 15 mm × 15 mm, 324-ball BGA with 0.8 mm pitch
APPLICATIONS
► Noise density: −147.5 dBFS/Hz
► Noise figure: 26.8 dB
► HD2: −67 dBFS
► HD3: −73 dBFS
► Worst other (excluding HD2 and HD3): −79 dBFS at 2.7 GHz
► DAC ac performance at 12 GSPS
► Wireless communications infrastructure
► Microwave point to point, E-band, and 5G mmWave
► Broadband communications systems
► DOCSIS 3.1 and 4.0 CMTS
► Phased array radar and electronic warfare
► Electronic test and measurement systems
► Full-scale output current range: 6.43 mA to 37.75 mA
► Two-tone IMD3 (−7 dBFS per tone): −78.9 dBc
► NSD, single-tone at 3.7 GHz: −155.1 dBc/Hz
► SFDR, single-tone at 3.7 GHz: −70 dBc
► Versatile digital features
► Configurable or bypassable DDCs and DUCs
► 8 fine complex DUCs and 4 coarse complex DUCs
► 8 fine complex DDCs and 4 coarse complex DDCs
► 48-bit NCO per DUC or DDC
► Programmable 192-tap PFIR filter for receive equalization
► Supports 4 different profile settings loaded via GPIO
► Programmable delay per datapath
► Receive AGC support
► Fast detect with low latency for fast AGC control
► Signal monitor for slow AGC control
GENERAL DESCRIPTION
®
The AD9081 mixed signal front end (MxFE ) is a highly integrated
device with four 16-bit, 12 GSPS maximum sample rate, RF digital-
to-analog converter (DAC) cores, and four 12-bit, 4 GSPS rate,
RF analog-to-digital converter (ADC) cores. The AD9081 is well
suited for applications requiring both wideband ADCs and DACs
to process signal(s) that have wide instantaneous bandwidth. The
device features eight transmit and eight receive lanes that support
24.75 Gbps/lane JESD204C or 15.5 Gbps/lane JESD204B stand-
ards. The device also has an on-chip clock multiplier, and a digital
signal processing (DSP) capability targeted at either wideband or
multiband direct to RF applications. The DSP datapaths can be
bypassed to allow a direct connection between the converter cores
and the JESD204 data transceiver port. The device also features
low latency loopback and frequency hopping modes targeted at
phase array radar system and electronic warfare applications. Two
models for the AD9081 are offered. The 4D4AC model supports the
full instantaneous channel bandwidth, whereas the 4D4AB model
supports a maximum instantaneous bandwidth of 600 MHz per
channel by automatically configuring the DSP to limit the instanta-
neous bandwidth at startup. See the Ordering Guide for more
information.
► Transmit DPD support
► Fine DUC channel gain control and delay adjust
► Coarse DDC delay adjust for DPD observation path
► Auxiliary features
► Fast frequency hopping and direct digital synthesis (DDS)
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to
change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
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