AD9874:  Low Power IF Digitizing Subsystem

The AD9874 is a general purpose IF subsystem that digitizes a low level 10-300MHz IF input signal with a bandwidth of up to 270 kHz. The signal chain of the AD9874 contains a low-noise amplifier, ...More

AD9874:  Low Power IF Digitizing Subsystem

Product Description

The AD9874 is a general purpose IF subsystem that digitizes a low level 10-300MHz IF input signal with a bandwidth of up to 270 kHz. The signal chain of the AD9874 contains a low-noise amplifier, mixer, a band pass sigma-Delta analog-to-digital converter and a decimation filter with programmable decimation factor. An automatic gain control (AGC) circuit provides the AD9874 with 12 dB of continuous gain adjustment

The high dynamic range and inherent anti-aliasing provided by the bandpass sigma delta converter allows the AD9874 to cope with blocking signals 95 dB stronger than the desired signal. Auxiliary blocks include clock and LO synthesizers in addition to a serial peripheral interface port.

The SPI port programs numerous parameters of the AD9874, thus allowing the device to be optimized for any given application. Programmable parameters include synthesizer divide ratios, AGC attenuation and attack/decay time, received signal strength level, decimation factor, output data format, 16 dB attenuator, and the selected bias currents. The bias currents of the LNA and mixer can be further reduced at the expense of degraded performance for battery-powered applications.

Applications

  • Multimode Narrow-Band Radio Products Analog/Digital UHF/VHF FDMA Receivers TETRA, APCO25, GSM/EDGE
  • Portable and Mobile Radio Products
  • Base Station Applications
  • SATCOM Terminals

Features

  • 10-300 MHz Input Frequency
  • Baseband (I/Q) Digital Output
  • 2.7-3.6 Supply Voltage
  • 10-270 KHz Output Signal Bandwidth
  • 8 dB SSB NF
  • +1 dBm IIP3 (typ, max. bias)
  • 95 dB Dynamic Range with 12 dB Continous AGC Range Enabled
  • -18 or -30 dBm max IF Input
    with AGC Disabled
  • LO and Clock Sampling Synthesizers
  • Programmable Decimation Factor,
    Output Format, AGC, and Synthesizer
    settings

Diagrams

AD9874 Diagram
Functional Block Diagram for AD9874

技术指标

Resolution (Bits) 24bit
T-Put Rate 541.5kSPS
Part # AD9874
Supply V Single(+3),Single(+3.3)

浏览其他的产品

Part# RxTx Function Channel BW MHz IF or RF Range MHz Primary Application Supply V Product Description Price* (1000-4999) Resolution (Bits) # Chan T-Put Rate
ADRF6750 Quadrature Modulator - 950 to 1575 VSAT Terminals - - - - - -
AD9868 Bband CODEC - - Broadband Wireline, Home Networking Multi(+3.3Anlg, +3.3Dig) 10-Bit DAC/80 MSPS, 10-Bit ADC, Mixed-Signal Front-End for Broadband Modem Applications - 10 1 80MSPS
AD9865 Bband CODEC 35 DC-40 Broadband Wireline, Home Networking Single(+3.3) 10-Bit DAC/80 MSPS, 10-Bit ADC, Mixed-Signal Front-End for Broadband Modem Applications $10.07 10 1 80MSPS
AD9869 Bband CODEC 54 DC-40 Broadband Wireline, Home Networking Multi(+3.3Anlg, +3.3Dig), Single(+3.3) 12-Bit DAC/80 MSPS, 12-Bit ADC, Mixed-Signal Front-End for Broadband Modem Applications $18.27 12 1 80MSPS
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
AD9863 Bband Quadrature CODEC 25/40 DC-40 Broadband Wireless Single(+3), Single(+3.3) Dual, 12-Bit DAC/12-Bit 50/80 MSPS ADC, Mixed-Signal Front-End Processor (MxFE™) For Bband Apps $21.68 12 2 50MSPS
AD9861-50 Bband Quadrature CODEC 25 DC-40 Broadband Wireless Single(+3), Single(+3.3) Dual 10-Bit DAC/Dual 50 MSPS ADC Mixed-Signal Front-End (MxFE™) For Broadband Comms Apps $10.84 10 2 50MSPS
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
AD9862 Bband Quadrature CODEC 32 DC-100 Broadband Wireless Single(+3.3) Dual 14-Bit DAC/Dual 12-Bit ADC Mixed Sig Front-End (MxFE™) for Bband Comms, Rx&Tx PGA, Digital SSB $30.11 12 2 64MSPS
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
AD6650 IF-to-Bits Rx Subsys 3.5 70-300 Wireless Infrastructure Single(+3), Single(+3.3) 16/24-Bit, 1 MSPS, Diversity IF-to-Baseband GSM/EDGE Narrowband Receiver $20.64 24 2 1MSPS
AD9969 Multi-Chan Bband CODEC 8 DC-70 Cable Modem/Set Top Box Single(+3.3) 3.3 V CMOS MxFE™ Mixed Signal Front End for broadband Set Top Box And Cable Modem applications $14.42 12 3 29MSPS
AD9878 Multi-Chan Bband CODEC 8 DC-70 Cable Modem/Set Top Box Single(+3.3) Dual 12-Bit, 29 MSPS Direct IF ADC/12-Bit Direct IF DAC, Mixed-Signal Front-End for Broadband Apps $13.68 12 4 29MSPS
AD9879 Multi-Chan Bband CODEC 8 DC-70 Cable Modem/Set Top Box Single(+3.3) 12-Bit Mixed-Signal Front-End for Set Top Box & Cable Modem Applications $12.12 12 5 29MSPS

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

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