Overview
The AFE7686IABJ is a high-performance, quad-channel RF sampling analog front-end (AFE) produced by Texas Instruments. It is part of the AFE76xx family, which is designed to synthesize and digitize wideband signals. This device is particularly suited for applications requiring high dynamic range and precision, such as cellular base stations, wideband communications, and microwave backhaul.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 14-bit |
| DAC Sample Rate | 9 GSPS |
| ADC Sample Rate | 3 GSPS |
| RF Frequency Range | Up to 5.2 GHz |
| RF Signal Bandwidth (Quad-channel mode) | 800 MHz (single-band), 300 MHz (dual-band) |
| RF Signal Bandwidth (Dual-channel mode) | 1200 MHz (TX)/1000 MHz (RX) (single-band), 800 MHz (dual-band) |
| On-chip DSAs per RX Channel | Dual selectable DSAs |
| Integrated TX DSA Functionality | Yes |
| Digital Up-Converters (DUCs) per TX Channel | 2 |
| Digital Down-Converters (DDCs) per RX Channel | 2 |
| Interpolation/Decimation Ratios | 6x, 8x, 9x, 12x, 16x, 18x, 24x, 36x / 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32 |
| Interface | 8 SerDes Transceivers up to 15 Gbps, JESD204B transport layer formatting with 8b/10b encoding |
| Package | 17mm x 17mm FC BGA, 0.8mm pitch |
| Power Supplies | 1.85 V, 1.15 V, 1.0 V, -1.8 V |
Key Features
- High dynamic range to generate and digitize 3G/4G signals for wireless base stations.
- Dual band digital up-converters (DUCs) and digital down-converters (DDCs) with multiple interpolation and decimation rates.
- 32-Bit NCOs for DUCs/DDCs.
- Integrated TX DSA functionality and on-chip dual selectable DSAs per RX channel.
- RX/FB Dynamic switching for TDD mode to assist DPD of the Power Amplifier (PA) on the transmitter path.
- Low jitter PLL/VCO for sampling clock generation.
- Subclass 1 multi-device synchronization.
- Analog RF peak power detectors and digital power detectors for AGC control and RF overload detectors for device reliability protection.
Applications
- Cellular base stations.
- Wideband communications.
- Microwave backhaul.
- Distributed antenna systems (DAS).
Q & A
- What is the resolution of the AFE7686IABJ?
The AFE7686IABJ has a 14-bit resolution. - What are the sample rates for the DAC and ADC of the AFE7686IABJ?
The DAC sample rate is 9 GSPS, and the ADC sample rate is 3 GSPS. - What is the RF frequency range supported by the AFE7686IABJ?
The RF frequency range is up to 5.2 GHz. - What is the maximum RF signal bandwidth in quad-channel mode?
In quad-channel mode, the maximum RF signal bandwidth is 800 MHz (single-band) and 300 MHz (dual-band). - Does the AFE7686IABJ support dynamic switching for TDD mode?
Yes, it supports RX/FB dynamic switching for TDD mode to assist DPD of the Power Amplifier (PA) on the transmitter path. - What type of interface does the AFE7686IABJ use?
The device uses 8 SerDes Transceivers up to 15 Gbps with JESD204B transport layer formatting and 8b/10b encoding. - What is the package type and size of the AFE7686IABJ?
The package is a 17mm x 17mm FC BGA with a 0.8mm pitch. - What are the power supply requirements for the AFE7686IABJ?
The power supplies required are 1.85 V, 1.15 V, 1.0 V, and -1.8 V. - What are some of the key applications for the AFE7686IABJ?
Key applications include cellular base stations, wideband communications, microwave backhaul, and distributed antenna systems (DAS). - Does the AFE7686IABJ have integrated DSA functionality?
Yes, it has integrated TX DSA functionality and on-chip dual selectable DSAs per RX channel.
