12-Bit, Ultra-wideband RF sampling subsystem - LM15851


12-Bit, Ultra-wideband RF sampling subsystem


The LM15851 device is a wideband sampling and digital tuning device. The core technology contained in the device is Texas Instruments’ giga-sample analog-to-digital converter (ADC) technology that enables a large block of frequency spectrum to be sampled directly at RF. This technology is combined with low-power digital-processing blocks that provide digital filtering and down-conversion. The selected frequency block is made available on a JESD204B serial interface that is compatible with downstream system-processing elements. Data is output as baseband 15-bit complex information for ease of downstream processing. Based on the digital down-converter (DDC) decimation and link output rate settings, this data is output on 1 to 5 lanes of the serial interface.

Clear advantages of the LM15851 device over existing solutions currently available on the market are scalability, cost per radio path, power consumption per radio path, and flexibility.

The LM15851 device is available in a 68 terminal QFN package. The device operates over the Industrial (–40°C ≤ TA ≤ 85°C) ambient temperature range.


  • Excellent Noise and Linearity
    up to and beyond FIN = 2.7 GHz
  • Configurable DDC
  • Decimation Factors from 4 to 32 (Complex Baseband Out)
  • Raw Output Bandwidth of 1000 MHz at

    4x Decimation and 4000 MSPS
  • Raw Output
    Bandwidth of 125 MHz at
    32x Decimation and 4000 MSPS
  • Low Pin-Count-Configurable JESD204B Output
  • Automatically Optimized Output Lane
  • Embedded Low Latency Signal Range Indication
  • Low Power Consumption
  • Key Specifications
    • Max Sampling Rate: 4000 MSPS
    • Min Sampling Rate: 1000 MSPS
    • DDC Output Word Size: 15-Bit Complex
      (30 bits total)
    • Noise Floor: −149 dBFS/Hz or −150 dbm/Hz
    • IMD3: −64 dBc (FIN = 2670 MHz
      ± 2.5 MHz at −10 dBFS)
    • FPBW (–3 dB): 3.3 GHz
    • NPR: 48.5 dB
    • Supply Voltages: 1.9 and 1.2 V
    • Power Consumption
      • Decimate by 10 (4000 MSPS): 2 W
      • Power Down Mode: 10 mW

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Parametrics Compare all products in Wideband Receivers

# Input Channels
Resolution (Bits)
Sample Rate (Max) (MSPS)
Analog Input BW (MHz)
Power Consumption (Typ) (mW)
Special Features
Logic Voltage DV/DD (Max) (V)
Logic Voltage DV/DD (Min) (V)
Analog Voltage AV/DD (Max) (V)
Analog Voltage AV/DD (Min) (V)
Operating Temperature Range (C)
Decimating Filter
Differential Inputs
Out of Range Indicator
Power Down    
-40 to 85    

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