Overview
The LM15851 device, part of the LM15851EVM evaluation module, is a wideband sampling and digital tuning device developed by Texas Instruments. This device leverages Texas Instruments' giga-sample analog-to-digital converter (ADC) technology, enabling the direct sampling of a large block of frequency spectrum at RF frequencies. The integrated Digital Down Converter (DDC) provides digital filtering and down-conversion, making the selected frequency block available on a JESD204B serial interface.
Key Specifications
| Parameter | Value |
|---|---|
| Max Sampling Rate | 4000 MSPS |
| Min Sampling Rate | 1000 MSPS |
| DDC Output Word Size | 15-Bit Complex (30 bits total) |
| IMD3 | −64 dBc (FIN = 2140 MHz ± 30 MHz at −13 dBFS) |
| FPBW (–3 dB) | 3.2 GHz |
| Supply Voltages | 1.9 V and 1.2 V |
| Power Consumption (Decimate by 10 at 4000 MSPS) | 2 W |
| Power Consumption (Power Down Mode) | <50 mW |
| Ambient Temperature Range | –40°C to 85°C |
| Package | 68-pin VQFN |
Key Features
- Embedded Low Latency Signal Range Indication
- Low Power Consumption
- Integrated Digital Down Converter (DDC) for digital filtering and down-conversion
- Data output as baseband 15-bit complex information on a JESD204B serial interface
- Support for decimation and link output rate settings, outputting data on 1 to 5 lanes of the serial interface
Applications
- Wireless Infrastructure
- RF-Sampling Software Defined Radio
- Wideband Microwave Backhaul
- DOCSIS / Cable Infrastructure
Q & A
- What is the maximum sampling rate of the LM15851 device?
The maximum sampling rate of the LM15851 device is 4000 MSPS.
- What is the minimum sampling rate of the LM15851 device?
The minimum sampling rate of the LM15851 device is 1000 MSPS.
- What is the output word size of the DDC in the LM15851 device?
The DDC output word size is 15-Bit Complex (30 bits total).
- What is the IMD3 specification for the LM15851 device?
The IMD3 specification is −64 dBc (FIN = 2140 MHz ± 30 MHz at −13 dBFS).
- What is the frequency passband width (FPBW) of the LM15851 device?
The FPBW is 3.2 GHz.
- What are the supply voltages for the LM15851 device?
The supply voltages are 1.9 V and 1.2 V.
- What is the power consumption when decimating by 10 at 4000 MSPS?
The power consumption is 2 W when decimating by 10 at 4000 MSPS.
- What is the power consumption in power down mode?
The power consumption in power down mode is less than 50 mW.
- What is the ambient temperature range for the LM15851 device?
The ambient temperature range is –40°C to 85°C.
- In what package is the LM15851 device available?
The LM15851 device is available in a 68-pin VQFN package.
