AFE7958
X-Band-HF-Sampling-AFE mit 4 Sende- und 6 Empfangsfrequenzen, 12-GSPS-DACs, 3-GSPS-ADCs und SYSREF-Ü
AFE7958
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- Four RF sampling 12GSPS DACs
- Six RF sampling 3GSPS ADCs
- Maximum RF signal bandwidth:
- 4TX: 1200 MHz; 2TX: 2400MHz
- 4RX: 1200 MHz; 6RX: 600MHz
- RF frequency range:
- TX: 600MHz to 12GHz
- RX: 5MHz to 12GHz
- Digital step attenuators (DSA):
- TX: 39dB range, 0.125dB steps
- RX: 25dB range, 0.5dB steps
- Digital Up-Converters (DUC) and Digital Down-Converters (DDC): Fast frequency hopping using 16 pre-configurable Numerically Controlled Oscillators (NCOs) in DDC and DUC
- Flexible clocking options:
- External RF clock
- Internal PLL mode with low speed input clock
- SerDes data interface:
- JESD204B and JESD204C compatible
- TX: 8 lanes, RX/FB: 8 lanes, up to 24.75Gbps
- Subclass 1 multi-device synchronization
- SYSREF alignment detector
- Package: 17mm × 17mm FCBGA, 0.8mm pitch
The AFE7958 is a high performance, wide bandwidth multi-channel transceiver, integrating four (4T) RF sampling transmitter (TX) chains and a total of six (6R) RF sampling receivers. With operation up to 12GHz, the AFE enables direct RF sampling in the L, S, C and X-band frequency ranges without the need for additional frequency conversions stages. This high density and configurability enables high-channel-count, multi-mission systems.
The TX and RX interface data rates can be chosen based on signal bandwidths, and is limited by the JESD204B/C interface speed. The data streams are matched to the DAC update rate or to the ADC conversion rate using interpolation in the DUC or decimation in the DDC.
The DAC runs at a maximum rate of 12GSPS, and has a mode to operate in the 2nd Nyquist, enabling the generation of RF signals up to 12GHz. A variable gain amplifier (termed as TDSA) enables changing the power output from the transmitter.
Each receive chain has a Digital Step Attenuator (RDSA) followed by a 3GSPS ADC which can convert higher Nyquist zones to digitize RF signals up to a maximum of 12GHz. Digital peak detectors at the ADC output can be configured to assist an external Automatic Gain control (AGC) loop to control LNA (external) gain and DSA (internal) attenuation.
The AFE7958 can be programmed using the SPI interface. The device also has several GPIOs that can be configured to provide interrupts and to achieve a fast control of functions like NCO switching.
Technische Dokumentation
| Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | Data sheet | AFE7958 4T6R RF Sampling AFE with 12GSPS DACs and 3GSPS ADCs datasheet | PDF | HTML | 27 Aug 2025 |
| Application note | AFE79xx Bringup Using HDL Module Without Microcontroller | PDF | HTML | 14 Aug 2025 | |
| Application note | AFE79XX as a Chirp Signal Generator | PDF | HTML | 10 Jul 2024 | |
| Application note | Debugging AFE7950 for Run Time and Post Bring-Up Failure | PDF | HTML | 28 Jun 2024 | |
| User guide | AFE79xx SPI Bringup Guide With Xilinx FPGAs (Rev. A) | PDF | HTML | 05 Mai 2024 | |
| Application note | AFE79xx as Single Chip Wideband Repeater Solution (Rev. A) | PDF | HTML | 30 Mai 2023 | |
| Application note | Determining Optimal Receive Buffer Delay in JESD204B and JESD204C Receivers | PDF | HTML | 07 Jul 2022 | |
| Application note | AFE7950 Super-Heterodyne Solution for K-Band | PDF | HTML | 15 Feb 2022 | |
| Application note | How to Achieve Frequency Hopping with the AFE79xx | 02 Jul 2020 |
Design und Entwicklung
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AFE7958EVM — AFE7958 – Evaluierungsmodul
| Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
|---|---|---|
| FCBGA (ABJ) | 400 | Ultra Librarian |
| FCBGA (ALK) | 400 | Ultra Librarian |
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