Features and Benefits

  • Guaranteed Phase and Gain Matching Specs
  • Programmable BW Up to 2.5MHz
  • Programmable Gain (0dB/6dB/12dB/24dB)
  • 9th Order Linear Phase Response
  • Differential, Rail-to-Rail Inputs and Outputs
  • Low Noise: –145dBm/Hz (Input Referred)
  • Low Distortion: –75dBc at 200kHz
  • Simple Pin Programming or SPI Interface
  • Set the Max Speed/Power with an External R
  • Operates from 2.7V to 3.6V
  • Input Range from 0V to 5.5V
  • 4mm × 4mm QFN Package

Product Details

The LTC6603 is a dual, matched, programmable lowpass filter for communications receivers and transmitters. The selectivity of the LTC6603, combined with its linear phase, phase matching and dynamic range, make it suitable for filtering in many communications systems. With 1.5° phase matching between channels, the LTC6603 can be used in applications requiring pairs of matched filters, such as transceiver I and Q channels. Furthermore, the differential inputs and outputs provide a simple interface for most communications systems.

The sampled data filter does not require an external clock yet its cutoff frequency can be set with a single external resistor with an accuracy of 3.5% or better. The external resistor programs an internal oscillator whose frequency is divided prior to being applied to the filter networks. This allows up to three cutoff frequencies that can be obtained for each external resistor value, allowing the cutoff frequency to be programmed over a range of more than six octaves. Alternatively, the cutoff frequency can be set with an external clock. The filter gain can also be programmed to 1, 2, 4 or 16.

The LTC6603 features a low power shutdown mode that can be programmed through the serial interface and is available in a 24-pin 4mm × 4mm QFN package.


  • Small/Low Cost Basestations: 
  • Low Cost Repeaters, Radio Links, and Modems
  • 802.11x Receivers
  • JTRS

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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