Four-transmit four-receive RF-sampling transceiver with single-band DUC/DDC and two feedback paths
Product details
Parameters
Package | Pins | Size
Features
- Quad RF sampling 12-GSPS transmit DACs
- Quad RF sampling 3-GSPS receive ADCs
- Dual RF sampling 3-GSPS feedback ADCs (AFE792x only)
- Maximum RF signal bandwidth:
- TX/FB: 1200 MHz (AFE7920/88) or 400 MHz (AFE7989) or 800MHz (AFE7921)
- RX: 600 MHz (AFE7920/88) or 400 MHz (AFE7921/AFE7989)
- Digital Step Attenuators (DSA):
- TX: 40 dB range, 1-dB analog and 0.125-dB digital steps
- RX: 25 dB range, 0.5-dB steps
- FB: 25 dB range, 0.5-dB steps
- Single or dual-band DUC/DDCs (AFE7920/88 only) for TX and RX
- Dual NCOs for fast frequency switching
- Supports TDD operation with fast switching between TX and RX
- Internal PLL/VCO to generate DAC/ADC clocks
- Optional external CLK at DAC or ADC rate
- SerDes data interface:
- JESD204B and JESD204C compliant
- 8 SerDes transceivers up to 29.5 Gbps
- 8b/10b and 64b/66b encoding
- 12-bit, 16-bit, 24-bit, and 32-bit resolution
- Subclass 1 multi-device synchronization
- Package: 17-mm × 17-mm FCBGA, 0.8-mm pitch
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Description
The AFE79xx is a family of high performance, wide bandwidth multi-channel transceivers, integrating four RF sampling transmitter chains, four RF sampling receiver chains, and up to two RF sampling digitizing auxiliary chains (feedback paths). The high dynamic range of the transmitter and receiver chains allows the device to generate and receive 3G, 4G, and 5G signals from wireless base stations, while the wide bandwidth capability of the AFE79xx devices is designed for multi-band 4G and 5G base stations.
Each receiver chain includes a 25-dB range DSA (Digital Step Attenuator), followed by a 3-GSPS ADC (analog-to-digital converter). Each receiver channel has an analog peak power detector and various digital power detectors to assist an external or internal autonomous automatic gain controller, and RF overload detectors for device reliability protection. The single or dual digital down converters (DDC) provide up to 600 MHz of combined signal BW. In TDD mode, the receiver channel can be configured to dynamically switch between the traffic receiver (TDD RX) and wideband feedback receiver (TDD FB), with the capability of re-using the same analog input for both purposes.
Each transmitter chain includes a single or dual digital up converters (DUCs) supporting up to 1200-MHz combined signal bandwidth. The output of the DUCs drives a 12-GSPS DAC (digital to analog converter) with a mixed mode output option to enhance 2nd or 3rd Nyquist operation. The DAC output includes a variable gain amplifier (TX DSA) with 40-dB range and 1-dB analog and 0.125-dB digital steps.
The feedback path includes an 25-dB range DSA driving a 3-GSPS RF sampling ADC, followed by a DDC with up to 1200-MHz bandwidth.

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For all other applications, see our general-purpose RF-sampling AFEs.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | AFE79xx Quad-Channel RF Transceiver With Feedback Path datasheet (Rev. C) | Jun. 23, 2020 |
Application note | AFE79xx Layout Guide (Rev. B) | Apr. 06, 2021 | |
Application note | System Design Considerations when Upgrading from JESD204B to JESD204C (Rev. A) | Apr. 05, 2021 | |
Application note | AFE76xx, AFE77xx, and AFE79xx JESD204 Layer Testing | Apr. 15, 2020 | |
Technical article | So, what's a VNA anyway? | Aug. 23, 2019 | |
Technical article | So, what's the deal with frequency response? | Aug. 23, 2019 | |
Application note | Temp Profile to Maintain Optimum FIT Performance | Jul. 23, 2019 | |
Technical article | So, what are S-parameters anyway? | May 23, 2019 | |
Technical article | How to achieve fast frequency hopping | Mar. 03, 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The AFE7920 evaluation module (EVM) is an RF-sampling transceiver platform that can be configured to support up to four-transmit, four-receive plus two-feedback (4T4R + 2FB) channels simultaneously.
The board evaluates the AFE7920 device, which is a quad-channel RF-sampling analog front end (AFE (...)
Features
- Allows evaluation of 4T4R + 2FB RF-sampling AFE7920 solutions
- JESD204B/C data interface to simplify digital interface; compliant up to 29.5-Gbps lane rates
- Supports JESD204B/C for synchronization and compatibility
- Option for DC-DC-based LDO-less power-management solution
- Onboard clocking solution (...)
Software development
Features
- Compatible with JEDEC JESD204a/b/c protocols
- Supports subclass 1 deterministic latency and multidevice synchronization
- Supported lane rates
- Up to 16.375 Gbps in 8b/10b mode
- Up to 20 Gbps in 64b/66b mode
- Supports all protocol related error detection and reporting features
- Integrated transport layer (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
FCBGA (ABJ) | 400 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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