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Texas Instruments AFE7955IALK
- Part No.:
- AFE7955IALK
- Manufacturer:
- Texas Instruments
- Category:
- RF Transceiver ICs
- Package:
- 400-BFBGA, FCBGA
- Datasheet:
-
AFE7955IALK.pdf
- Description:
- IC RF TXRX CELLULAR 400FCBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,412
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Product details
Overview
AFE7955IALK from Texas Instruments is a 2-transmit/3-receive RF sampling analog front-end (AFE) IC integrating dual 12 GSPS DACs and triple 3 GSPS ADCs, supporting direct RF sampling from 600 MHz to 12 GHz. It delivers up to 1200 MHz instantaneous signal bandwidth per channel, features integrated digital step attenuators (40 dB TX / 25 dB RX), JESD204B/C SerDes up to 29.5 Gbps, and supports L/S/C/X-band radar and defense radio systems.
For engineers reviewing the AFE7955IALK datasheet, AFE7955IALK pinout, AFE7955IALK application, or AFE7955IALK equivalent, key selection criteria include RF frequency coverage (600 MHz–12 GHz), DAC/ADC resolution (14-bit), DSA step granularity (0.125 dB TX / 0.5 dB RX), multi-band DUC/DDC flexibility, and FCBGA-400 package thermal performance (RθJA = 16.2°C/W).
Technical Context
The AFE7955IALK implements a mixed-signal architecture with two independent transmit paths-each featuring interpolation, digital up-conversion (DUC), and a 12-GSPS DAC with mixed-mode output for enhanced 2nd Nyquist operation-and three receive paths: two with analog peak power detectors, digital power monitoring, and RF overload protection, plus one wideband DDC path supporting up to 1200 MHz bandwidth. Clocking supports internal PLL/VCO or external clock at DAC/ADC sample rates.
Its JESD204B/C interface uses eight SerDes transceivers (up to 29.5 Gbps) with Subclass 1 synchronization for deterministic latency across multi-device systems. Digital processing includes 16 numerically controlled oscillators (NCOs) per TX/RX chain and single/dual-band DUC/DDC configurations, enabling flexible spectral placement and channelization in wideband SDR and EW applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DAC Resolution | 14-bit - Enables high dynamic range and low quantization noise in wideband waveform synthesis. |
| ADC Resolution | 14-bit - Supports high-fidelity digitization of wide instantaneous bandwidth signals without aliasing penalties. |
| RF Frequency Range | 600 MHz – 12 GHz - Covers full L, S, C, and X bands for radar, EW, and tactical comms without up/down-conversion stages. |
| Max Signal Bandwidth | 1200 MHz per channel - Allows simultaneous capture or generation of ultra-wideband waveforms (e.g., 1 GHz+ radar chirps). |
| TX DSA Range & Step | 40 dB range, 0.125 dB steps - Enables precise RF output power control with <±0.1 dB DNL after calibration for closed-loop AGC. |
| RX DSA Range & Step | 25 dB range, 0.5 dB steps - Provides fine-grained input gain adjustment while maintaining phase coherence across attenuation states. |
| SerDes Data Rate | Up to 29.5 Gbps (JESD204B/C) - Supports high-throughput data transfer with Subclass 1 sync for deterministic latency in multi-channel systems. |
| Package | 17 mm × 17 mm FCBGA, 0.8 mm pitch, 400 pins - Optimized for high-density RF PCB layouts with validated thermal resistance (RθJA = 16.2°C/W). |
Pinout & Package
AFE7955IALK is housed in a 17 mm × 17 mm, 0.8 mm pitch, 400-pin Flip-Chip Ball Grid Array (FCBGA) package optimized for RF signal integrity and thermal dissipation in high-power wideband systems. The package supports standard reflow profiles and requires controlled impedance routing for SerDes and RF I/O.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1TX+/−, 2TX+/− | Differential RF Transmit Outputs | Two 12-GSPS DAC-based RF output pairs supporting direct synthesis up to 12 GHz; require matched 50 Ω termination. |
| 1RX+/−, 2RX+/−, 3RX+/− | Differential RF Receive Inputs | Three 3-GSPS ADC input channels with integrated DSAs; 1RX/2RX include analog/digital power detectors and overload protection. |
| {1:8}STX+/−, {1:8}SRX+/− | JESD204B/C SerDes Lanes | Eight bidirectional high-speed lanes (up to 29.5 Gbps) supporting Subclass 1 synchronization for deterministic latency. |
| CLKIN+/−, SYSREF+/− | Reference Clock & System Reference | Differential inputs for master clock and multi-device timing alignment; critical for phase-coherent multi-channel operation. |
| 1FB+/−, 2FB+/− | Feedback Receiver Inputs | Dedicated wideband feedback paths for digital predistortion (DPD) or loopback calibration; support up to 1200 MHz bandwidth. |
| VDD1P2RX/TXCLK, VDD1P8TX/RX, DVDD0P9 | Power Supply Rails | Multiple isolated supply domains (0.9 V, 1.2 V, 1.8 V) minimize noise coupling between analog, clock, and digital sections. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 12-GSPS DACs with mixed-mode output | Enables 2nd Nyquist operation for extended RF coverage beyond fs/2, reducing need for image-reject filtering in X-band. |
| Triple 3-GSPS ADCs with wideband DDC | One dedicated wideband DDC path supports full 1200 MHz bandwidth on third receiver, ideal for spectrum monitoring or wideband DPD feedback. |
| Integrated digital step attenuators (DSA) | TX DSA (40 dB, 0.125 dB steps) and RX DSA (25 dB, 0.5 dB steps) provide calibrated, phase-stable gain control for closed-loop AGC and power management. |
| JESD204B/C Subclass 1 interface | Ensures deterministic latency and multi-device synchronization across large channel-count arrays-critical for phased-array radar beamforming. |
| On-chip RF overload detection | Protects ADC front-end from damage during high-power transient events (e.g., jammer pulses), improving system reliability in contested environments. |
| 16 NCOs per TX/RX chain | Supports independent frequency translation and agile hopping across multiple simultaneous waveforms without host processor intervention. |
Applications
| Radar Systems | Defense Radio Front Ends |
|---|---|
Use Scenario: Phased-array radar transceivers requiring simultaneous multi-beam transmission and wideband echo reception in L/S/C bands. IC Role / Device Role / Timing Role: Direct RF sampling AFE providing 2T3R channelization, real-time DUC/DDC, and deterministic JESD204C timing for coherent beamforming. Use Value: Eliminates intermediate frequency stages and local oscillator chains, reducing SWaP-C while enabling >1 GHz instantaneous bandwidth for high-resolution target discrimination. | Use Scenario: Software-defined radios for secure, frequency-agile military communications operating across 600 MHz–12 GHz. IC Role / Device Role / Timing Role: Wideband transceiver core handling both narrowband voice/data and wideband waveform generation/reception with sub-microsecond retuning. Use Value: Single-chip 2T3R capability enables compact, low-latency radios with adaptive interference mitigation and real-time spectrum awareness. |
| Electronic Warfare (EW) Seekers | Tactical Communications Infrastructure |
Use Scenario: Missile seeker front ends performing wideband signal intelligence (SIGINT), direction finding, and jamming in contested RF environments. IC Role / Device Role / Timing Role: High-dynamic-range receiver (3× 3 GSPS ADCs) with fast DSA settling and overload protection, paired with agile TX for DRFM-based jamming. Use Value: 88–95 dB SFDR and -107 dBFS HD2 at -13 dBFS enable detection of weak signals amid strong interferers; 25 dB RX DSA allows rapid gain adaptation to pulsed threats. | Use Scenario: Base station and backhaul radios for tactical networks requiring high spectral efficiency, MIMO support, and resilience to jamming. IC Role / Device Role / Timing Role: Multi-channel AFE serving as physical layer engine for OFDM/NR waveforms with integrated DUC/DDC, NCOs, and JESD204C deterministic latency. Use Value: 1200 MHz per-channel bandwidth supports 100+ MHz channel aggregation; dual-band DUC/DDC enables concurrent multi-standard operation (e.g., LTE + NR). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF sampling AFE applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AFE7954IALK | 2T2R configuration (vs. 2T3R); identical DAC/ADC specs, same package and pinout. | Lacks third RX channel; unsuitable for applications requiring simultaneous wideband feedback + dual receive (e.g., DPD + SIGINT). | Select when system needs only two receive paths and cost/area optimization is prioritized over third-channel flexibility. |
| AD9082BBCZ | 2T4R, 12 GSPS DACs / 4 GSPS ADCs; supports higher max ADC rate but narrower RF range (up to 6 GHz). | Optimized for sub-6 GHz 5G infrastructure; lacks X-band coverage and integrated RF overload protection. | Prefer for cellular baseband applications below 6 GHz where higher ADC sampling rate and additional RX channel outweigh X-band need. |
Compared with AFE7955IALK, the AFE7954IALK offers identical RF performance in a reduced 2T2R form factor-ideal for space-constrained radar modules-while the AD9082BBCZ provides higher ADC throughput for 5G but sacrifices 6–12 GHz operation and robustness features like on-chip overload detection.
Availability
AFE7955IALK is available at Aetrix Electronics and suitable for radar systems, defense radio front ends, and electronic warfare seekers requiring stable component supply, long-term obsolescence management, and traceable sourcing for DO-254/EN 50128-compliant programs.
Supply support for AFE7955IALK includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-performance signal chain solutions for industrial, automotive, and defense markets.
The AFE79xx product line delivers ultra-wideband RF sampling AFEs designed specifically for next-generation radar, electronic warfare, and secure communications systems requiring direct RF sampling from sub-1 GHz through X-band.
FAQ
What is the maximum RF frequency supported by the AFE7955IALK?
The AFE7955IALK supports an RF frequency range of 600 MHz to 12 GHz, covering full L, S, C, and X bands. This enables direct RF sampling without up/down-conversion stages in radar, EW, and defense radio applications. Operation above 6 GHz requires external clock mode and non-interleave mix-mode DAC configuration, as specified in the AFE7955IALK datasheet Section 4.5.
Does the AFE7955IALK support JESD204C, and what is its maximum SerDes lane rate?
Yes, the AFE7955IALK supports both JESD204B and JESD204C protocols. It features eight SerDes transceivers capable of up to 29.5 Gbps per lane, with Subclass 1 multi-device synchronization for deterministic latency-essential for phased-array radar and time-sensitive EW systems. Lane configuration and protocol selection are programmable via SPI register settings defined in the AFE7955IALK technical reference manual.
How many receive channels does the AFE7955IALK have, and what distinguishes the third RX path?
The AFE7955IALK has three receive channels: two with analog peak power detectors, digital power monitoring, and RF overload protection; and a third wideband receiver path with a dedicated DDC supporting up to 1200 MHz instantaneous bandwidth. This third path is optimized for feedback applications such as digital predistortion (DPD) or wideband spectrum monitoring, and does not include the same level of autonomous AGC support as the first two RX chains.
What are the DSA specifications for transmit and receive paths in the AFE7955IALK?
The AFE7955IALK integrates digital step attenuators with 40 dB range and 0.125 dB steps on each TX path, and 25 dB range with 0.5 dB steps on each RX path. DSA accuracy is ±0.1 dB DNL after calibration, and phase error is ≤±2° across the full attenuation range at 9.6 GHz. These specifications enable precise, phase-coherent gain control required for closed-loop AGC and beamforming calibration in the AFE7955IALK.
Is the AFE7955IALK pin-compatible with other devices in the AFE79xx family?
The AFE7955IALK shares the same 17 mm × 17 mm FCBGA-400 package and pinout with the AFE7954IALK (2T2R variant), enabling drop-in replacement where only two receive channels are needed. However, it is not pin-compatible with AFE7900-series or earlier generations due to differences in SerDes lane count, power rail allocation, and RF I/O assignment. Full compatibility verification must be performed using the AFE7955IALK IBIS model and layout guidelines.
AFE7955IALK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 400-BFBGA, FCBGA
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- TxRx Only
- RF Family/Standard:
- Cellular
- Protocol:
- LTE
- Modulation:
- -
- Frequency:
- 600MHz ~ 12GHz
- Data Rate (Max):
- 29.5Gbps
- Power - Output:
- 4.6dBm
- Sensitivity:
- -
- Memory Size:
- -
- Serial Interfaces:
- GPIO
- GPIO:
- -
- Voltage - Supply:
- 0.9V ~ 0.95V, 1.15V ~ 1.25V, 1.75V ~ 1.85V
- Current - Receiving:
- 20mA ~ 1.418A
- Current - Transmitting:
- 20mA ~ 1.418A
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 400-FCBGA (17x17)
AFE7955IALK FAQ
1.How can I place an order for AFE7955IALK through Aetrix?
Please submit a Request for Quotation (RFQ) for AFE7955IALK on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AFE7955IALK reliable?
The price and inventory of AFE7955IALK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AFE7955IALK is usually 5 days.
3.What payment methods are accepted for AFE7955IALK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AFE7955IALK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AFE7955IALK?
AFE7955IALK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AFE7955IALK order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AFE7955IALK?
For technical support, including AFE7955IALK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AFE7955IALK requirements.
6.How does Aetrix verify that AFE7955IALK is sourced from the original manufacturer or authorized distributors?
All AFE7955IALK products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AFE7955IALK meets industry standards.
7.What is the process for return or replacement of AFE7955IALK?
All AFE7955IALK units undergo pre-shipment inspection (PSI). If there is an issue with AFE7955IALK, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AFE7955IALK part is unused and in its original packaging.
Return procedure for AFE7955IALK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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