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AD9870:  IF Digitizing Subsystem

The AD9870 is a general-purpose IF subsystem which digitizes a low-level 10-300 MHz IF input with a bandwidth of up to 150 kHz. The signal chain of the AD9870 consists of a low-noise amplifier, a mixer, a variable gain amplifier with integral anti-alias filter, a bandpass sigma-delta analog-to-digital converter and a decimation filter with programmable decimation factor. An automatic gain control ...More

AD9870:  IF Digitizing Subsystem

Product Description

The AD9870 is a general-purpose IF subsystem which digitizes a low-level 10-300 MHz IF input with a bandwidth of up to 150 kHz. The signal chain of the AD9870 consists of a low-noise amplifier, a mixer, a variable gain amplifier with integral anti-alias filter, a bandpass sigma-delta analog-to-digital converter and a decimation filter with programmable decimation factor. An automatic gain control (AGC) circuit provides the AD9870 with 25 dB of continuous gain adjustment. The high dynamic range of the bandpass sigma-delta converter allows the AD9870 to cope with blocking signals which are as much as 70 dB stronger than the desired signal. Auxiliary blocks include clock and LO synthesizers as well as a serial peripheral interface (SPI) port.

RESOURCES & TOOLS

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  • 10-300 MHz Input Frequency
  • Baseband (I/Q) Digital Output
  • 10-150 kHz Output Signal Bandwidth
  • 12 dB SSB NF
  • > -5 dBm IIP3 (High IIP3 Mode)
  • 25 dB Continuous AGC Range + 16
    dB Gain Step
  • Support for LO and Sampling Clock Synthesis
  • Programmable Decimation Rate,
    Output Format
  • AAF cutoff, AGC and Synthesizer
    settings
  • 300 W Input Impedance
  • 2.7-3.6 V Supply Voltage
  • Low Current: 40 mA typ.
    (High IIP3 Mode)
  • Resolution (Bits): 16bit
  • T-Put Rate: 300kSPS
  • Part #: AD9870
  • Supply V: Single(+3),Single(+3.3)

Functional Block Diagram for AD9870

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ADRF6604 IF-to-Bits Rx Subsys 500 1200-3600 Receiver Single(+5) 2500 MHz to 2900 MHz Rx Mixer with Integrated Fractional-N PLL and VCO - - - -
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ADRF6702 Bits-to-RF/IF Tx Subsys 500 1200-2400 Transmitter Single(+5) 1550 MHz to 2150 MHz Quadrature Modulator with Integrated Fractional-N PLL and VCO - - - -
ADRF6703 Bits-to-RF/IF Tx Subsys 500 1600-2600 Transmitter Single(+5) 2100 MHz to 2600 MHz Quadrature Modulator with Integrated Fractional-N PLL and VCO - - - -
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AD9866 Bband CODEC 35 DC-40 Broadband Wireline, Home Networking Single(+3.3) 12-Bit DAC/80 MSPS 12-Bit ADC, Mixed-Signal Front-End for Broadband Modem Applications $18.77 12 1 80MSPS
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AD9861-80 Bband Quadrature CODEC 40 DC-40 Broadband Wireless Single(+3), Single(+3.3) Dual 10-Bit DAC/Dual 80 MSPS ADC Mixed-Signal Front-End (MxFE™) For Broadband Comms Apps $10.84 10 2 80MSPS
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AD9860 Bband Quadrature CODEC 32 DC-100 Broadband Wireless Single(+3.3) Dual 12-Bit DAC/Dual 10-Bit ADC Mixed Sig Front-End (MxFE™) for Bband Comms, Rx&Tx PGA, Digital SSB $13.90 10 2 64MSPS
AD6600 IF-to-Bits Rx Subsys 5 to 10 70-250 Wireless Infrastructure Multi(+3.3, +5), Single(+5) 11-Bit, 1-Channel 20MSPS, or 2-Channel 10 MSPS Gain-Ranging ADC with RSSI $38.96 11 2 20MSPS
AD9864 IF-to-Bits Rx Subsys 0.007 to 0.270 10-300 Narrowband Radio, Portable & Mobile Radio Single(+3), Single(+3.3) 24-Bit Bandpass Sigma-Delta ADC/IF Digitizing Subsystem $10.07 24 1 375kSPS
AD9874 IF-to-Bits Rx Subsys 0.007 to 0.270 10-300 Narrowband Radio, Portable & Mobile Radio Single(+3), Single(+3.3) 24-Bit Bandpass Sigma-Delta ADC IF Digitizing Subsystem $15.14 24 1 541.5kSPS
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