ADI AD9081BBPZ-4D4AC
- Quad 16-bit 12 GSPS RF DAC and quad 12-bit 4 GSPS RF ADC integrated on a single 28 nm chip
- Full instantaneous channel bandwidth up to 2.4 GHz per channel in 4D4AC configuration
- 48 digital downconverters and 16 programmable FIR filters for flexible multiband signal processing
- Low latency loopback and frequency hopping modes purpose-built for phased array radar and electronic warfare
- JESD204B/C serial interface with on-chip clock PLL in a 324-ball BGA, –40°C to +120°C junction temperature
The ADI AD9081BBPZ-4D4AC is the full-bandwidth AC configuration of Analog Devices' AD9081 MxFE — Mixed-signal Front End — a highly integrated 28 nm RF transceiver that places four 16-bit 12 GSPS DAC cores and four 12-bit 4 GSPS ADC cores on a single monolithic device. The "4D4AC" suffix identifies the four-DAC, four-ADC configuration with the AC bandwidth option, which supports the device's full instantaneous channel bandwidth of up to 2.4 GHz per channel. This distinguishes it from the AB configuration, which limits instantaneous bandwidth to 600 MHz per channel through automatic DSP configuration at startup. For radar, electronic warfare, and phased array applications where full wideband capability is a system requirement, the 4D4AC is the correct procurement path.
What sets the AD9081 apart from discrete DAC plus ADC implementations is the depth of integrated digital signal processing. Forty-eight digital downconverters with complex NCOs, sixteen programmable finite impulse response filters, and configurable DSP datapaths enable direct digital synthesis and reception across multiple simultaneous frequency bands without external DSP resources. The low latency loopback mode provides a calibrated signal path from DAC output to ADC input for built-in self-test and calibration in deployed radar and EW systems. The frequency hopping mode supports agile waveform generation and reception for electronic warfare applications where rapid frequency change is a fundamental operational requirement. The on-chip clock PLL synthesizes the RF DAC and ADC sample clocks from a low-frequency reference, reducing the external clocking infrastructure required in the system design.
Related Products For Your Business
Direct RF synthesis at 12 GSPS and direct RF sampling at 4 GSPS from a single 28 nm chip — the ADI AD9081BBPZ-4D4AC compresses what previously required multiple discrete high-speed DACs, ADCs, mixers, and DSP devices into a single 324-ball BGA. For radar and electronic warfare system designers, the significance is architectural: a direct RF transceiver that eliminates the LO chain, mixer spurious, and image response of a superheterodyne architecture while integrating the digital signal processing required for multiband operation, frequency hopping, and calibration. The 4D4AC configuration specifically unlocks the full 2.4 GHz instantaneous bandwidth per channel that wideband EW and radar applications require, distinguishing it from the bandwidth-limited 4D4AB configuration.
AD9081BBPZ-4D4AC Architecture: Integrated MxFE DSP for Radar and EW
The AD9081’s DSP datapath is where the distinction from a simple high-speed converter becomes clear. Forty-eight DDC blocks with independent complex NCOs enable simultaneous reception and processing of multiple frequency bands from the four physical ADC channels — a capability that supports channelized EW receivers, multifunction radar receivers, and simultaneous multi-band communication reception from a single device. The sixteen programmable FIR filters allow channel-specific filtering without external digital processing resources. The frequency hopping mode supports rapid NCO frequency changes via GPIO with deterministic latency, enabling agile waveform generation and reception at the switching speeds required in modern electronic warfare environments. The low latency loopback path from DAC output through the RF signal path back to the ADC enables built-in calibration and self-test that reduces field maintenance requirements in deployed military systems. An on-chip clock PLL synthesizes the 12 GSPS and 4 GSPS sample clocks from a low-frequency external reference, simplifying the system clocking architecture and reducing the phase noise contribution of the distribution path.
AD9081BBPZ-4D4AC vs AD9081BBPZ-4D4AB: Bandwidth Configuration Selection
The two AD9081 model configurations differ only in their instantaneous bandwidth capability:
| AD9081BBPZ-4D4AC | AD9081BBPZ-4D4AB | |
|---|---|---|
| Instantaneous Bandwidth | Up to 2.4 GHz per channel | 600 MHz per channel (limited at startup) |
| DSP Configuration | Full bandwidth, user-configured | Bandwidth-limited, auto-configured |
| DAC/ADC Cores | 4×16-bit 12 GSPS / 4×12-bit 4 GSPS | 4×16-bit 12 GSPS / 4×12-bit 4 GSPS |
| Package | 324-Ball BGA ED | 324-Ball BGA ED |
| Best For | Wideband radar, EW, full-bandwidth apps | Narrowband or channel-limited applications |
For radar and EW programs requiring the full 2.4 GHz instantaneous bandwidth per channel, the AD9081BBPZ-4D4AC is the only correct configuration. The AD9081BBPZ-4D4AB is appropriate for programs where 600 MHz per channel is sufficient and the automatic DSP bandwidth limiting simplifies the bring-up and configuration process. For high-resolution direct RF sampling applications at lower conversion rates, the AD6688BBPZ-3000 provides a dual 14-bit 3 GSPS ADC-only solution for observation receiver applications.
Sourcing the ADI AD9081BBPZ-4D4AC
The AD9081BBPZ-4D4AC is an active-production flagship component with demand concentrated in radar, EW, and phased array defense programs. Its 28 nm process and high integration level make it a complex device with lead times that can extend during periods of high demand. We carry verified inventory with full lot traceability and anti-counterfeit inspection on every order, and can support both prototype quantities for system development and production volumes for program builds. Contact us today to confirm availability and request a quote, and our team responds within 24 hours.
- 4D4AC configuration supports full 2.4 GHz instantaneous bandwidth, not available in the 4D4AB configuration
- Forty-eight DDCs with independent NCOs enable simultaneous multiband reception from four physical ADC inputs
- Frequency hopping mode with deterministic GPIO-triggered NCO switching for agile EW waveform operation
- Low latency loopback enables built-in calibration without external test signal injection hardware
- On-chip clock PLL synthesizes 12 GSPS and 4 GSPS clocks from a low-frequency reference, simplifying system clocking
- Only two supply voltages required, simplifying power management relative to multi-chip implementations
- Complete API software and HDL reference designs available through ADI to accelerate system development
- Full lot traceability and anti-counterfeit inspection on every order
Frequently Asked Questions (FAQ)
What Is the ADI AD9081BBPZ-4D4AC and What Does the 4D4AC Suffix Mean?
The AD9081BBPZ-4D4AC is a 28 nm MxFE RF transceiver integrating four 16-bit 12 GSPS RF DAC cores and four 12-bit 4 GSPS RF ADC cores with 48 DDCs, 16 programmable FIR filters, and JESD204B/C interface in a 324-ball BGA. The 4D4AC suffix identifies the four-DAC, four-ADC configuration with the AC bandwidth option, which enables the full instantaneous channel bandwidth of up to 2.4 GHz per channel. The AB configuration limits this to 600 MHz per channel through automatic DSP configuration.
What Is the Difference Between the 4D4AC and 4D4AB Configurations?
The 4D4AC and 4D4AB use the same silicon die and package. The difference is the instantaneous channel bandwidth: the 4D4AC supports up to 2.4 GHz per channel with user-configured DSP, while the 4D4AB automatically configures the DSP at startup to limit instantaneous bandwidth to 600 MHz per channel. For wideband radar, EW, and phased array applications requiring the full bandwidth, the 4D4AC is the required configuration.
What FPGA Platforms Are Compatible With the AD9081BBPZ-4D4AC?
The AD9081 JESD204B/C interface is compatible with major FPGA platforms including Xilinx UltraScale and UltraScale+ (including Virtex UltraScale+ XCVU9P used on the reference evaluation platform), Intel Arria and Stratix series, and Microsemi PolarFire. ADI provides HDL reference designs and MATLAB system-level interfacing software through the AD9081-FMCA-EBZ evaluation board and the Quad-MxFE system development platform.
Does the AD9081BBPZ-4D4AC Require an External LO?
No. The direct RF sampling architecture eliminates the local oscillator, mixers, and IF stages of a traditional superheterodyne architecture. Frequency translation is performed digitally by the on-chip NCOs in the DDC and DUC blocks. The only external clock required is a reference for the on-chip clock PLL, which synthesizes the 12 GSPS and 4 GSPS sample clocks internally.
How Do I Request a Quote for the ADI AD9081BBPZ-4D4AC?
Submit an inquiry through our website contact form or email our sales team directly. We will respond within 24 hours with pricing, availability, and lead time, and can discuss long-term supply agreements for radar and EW production programs.