Overview
The LM15851NKER is a wideband sampling and digital tuning device developed by Texas Instruments. This device utilizes Texas Instruments' giga-sample analog-to-digital converter (ADC) technology, enabling the direct sampling of a large block of frequency spectrum at RF. It features an integrated Digital Down Converter (DDC) that provides digital filtering and down-conversion, making the selected frequency block available on a JESD204B serial interface. The device outputs data as baseband 15-bit complex information, facilitating ease of downstream processing. The LM15851NKER is packaged in a 68-pin VQFN and operates over an industrial ambient temperature range of –40°C to 85°C.
Key Specifications
| Specification | 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 Down Mode | <50 mW |
| Package | 68-pin VQFN |
| Operating Temperature Range | –40°C to 85°C |
Key Features
- Excellent Noise and Linearity up to and beyond FIN = 3 GHz
- Configurable DDC with decimation factors from 4 to 32 (Complex Baseband Out)
- Usable Output Bandwidth of 800 MHz at 4x Decimation and 4000 MSPS, and 100 MHz at 32x Decimation and 4000 MSPS
- Low Pin-Count JESD204B Subclass 1 Interface
- Automatically Optimized Output Lane Count
- Embedded Low Latency Signal Range Indication
- Low Power Consumption
Applications
- Wireless Infrastructure
- RF-Sampling Software Defined Radio
- Wideband Microwave Backhaul
- DOCSIS / Cable Infrastructure
Q & A
- What is the maximum sampling rate of the LM15851NKER?
The maximum sampling rate is 4000 MSPS. - What is the output word size of the DDC?
The DDC output word size is 15-Bit Complex (30 bits total). - What is the operating temperature range of the LM15851NKER?
The operating temperature range is –40°C to 85°C. - What interface does the LM15851NKER use for data output?
The device uses a JESD204B serial interface. - What are the supply voltages for the LM15851NKER?
The supply voltages are 1.9 V and 1.2 V. - What is the power consumption in power down mode?
The power consumption in power down mode is less than 50 mW. - How many lanes can the serial interface output data on?
The data can be output on 1 to 5 lanes of the serial interface. - What is the FPBW (–3 dB) of the LM15851NKER?
The FPBW (–3 dB) is 3.2 GHz. - What is the IMD3 specification for the LM15851NKER?
The IMD3 is −64 dBc (FIN = 2140 MHz ± 30 MHz at −13 dBFS). - In what package is the LM15851NKER available?
The device is available in a 68-pin VQFN package.
