LM15851 12-Bit, 4.0-GSPS, RF-Sampling Wideband Receiver | TI.com

LM15851 (ACTIVE) 12-Bit, 4.0-GSPS, RF-Sampling Wideband Receiver



The LM15851 device is a wideband sampling and digital tuning device. Texas Instruments’ giga-sample analog-to-digital converter (ADC) technology enables a large block of frequency spectrum to be sampled directly at RF. An integrated DDC (Digital Down Converter) provides digital filtering and down-conversion. The selected frequency block is made available on a JESD204B serial interface. 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.

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


  • Excellent Noise and Linearity up to and beyond FIN = 3 GHz
  • Configurable DDC
  • Decimation Factors from 4 to 32 (Complex Baseband Out)
  • Usable Output Bandwidth of 800 MHz at
    4x Decimation and 4000 MSPS
  • Usable Output Bandwidth of 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
  • Key Specifications:
    • 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 (4000 MSPS): 2 W
      • Power Down Mode: <50 mW

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Part number Order Number of input channels Resolution (Bits) Sample rate (Max) (MSPS) Features Analog input BW (MHz) SFDR (Typ) (dB) SNR (Typ) (dB) Power consumption (Typ) (mW) Logic voltage DV/DD (Max) (V) Logic voltage DV/DD (Min) (V) Analog voltage AVDD (Max) (V) Analog voltage AVDD (Min) (V) Operating temperature range (C)
LM15851 Order now 1     15     4000     Decimating Filter
Differential Inputs
Out of Range Indicator
Power Down
Ultra High Speed    
3300     70.1     59.9     2000     1.26     1.14     1.995     1.805     -40 to 85