LTC6602 - Dual Matched, High Frequency Bandpass/Lowpass Filters

The LTC6602 is a dual, matched, programmable bandpass or lowpass filter and differential driver. The selectivity of the LTC6602, combined with its phase matching and dynamic range, make it ideal for filtering in RFID systems. With two degree phase matching between channels, the LTC6602 can be used in applications requiring highly matched filters, such as transceiver I and Q channels. Gain programmability, and the fully differential inputs and outputs, simplify implementation in most systems.

Both channels of the LTC6602 consist of a programmable lowpass and highpass filter. For bandpass functionality, the lowpass filters are programmed for the upper cutoff frequency. For lowpass functionality, the highpass filters can be bypassed. The filter cutoff frequencies can be set with a guaranteed accuracy of 3% with the use of a single resistor. Alternatively, the filter cutoff frequencies can be controlled with an external clock.

The LTC6602 operates on a single 2.7V to 3.6V supply and features a low power shutdown mode.

  • Matched Dual Filter/Driver, Ideal for RFID Readers
  • Guaranteed Phase Matching to Within 2 Degrees
  • Guaranteed Gain Matching to Within 0.2dB
  • Configurable as Lowpass or Bandpass: – Programmable 5th Order Lowpass: 42kHz to 900kHz – Programmable 4th Order Highpass: 4.2kHz to 90kHz
  • Programmable Gain: 1×, 4×, 16×, 32×
  • Simple Pin Programming or SPI Interface
  • Low Noise: –145dBm/Hz (Input Referred)
  • Low Distortion: –75dBc at 200kHz
  • Differential, Rail-to-Rail Inputs and Outputs
  • Input Range Extends from 0V to 5V
  • Low Voltage Operation: 2.7V to 3.6V
  • Shutdown Mode
  • 4mm × 4mm QFN Package
Typical Application
LTC6602 Typical Application
LTC6602 Typical Application
  • Multiprotocol RFID Readers: EPC-GEN2, ISD and IPX
  • IDEN, PHS, GSM Basestations
  • Repeaters, Radio Links, and Modems
  • Wireless Telemetry
  • JTRS
LTC6602 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC6602CUF#PBF4x4 QFN-24C$9.90$6.95
LTC6602CUF#TRPBF4x4 QFN-24C$7.00
LTC6602IUF#PBF4x4 QFN-24I$11.41$7.99
LTC6602IUF#TRPBF4x4 QFN-24I$8.04
Demo Boards
Part NumberDescriptionPrice
DC1304A-ALTC6602 Demo Board | Dual Programmable 900kHz LP/BP Filter / ADC Driver$125.00
Companion Boards
Part NumberDescriptionPrice
DC2026CLinduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform$75.00
Design Note
Reliability Data
Product Selector Card
LT Journal
CAD Symbol
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LTC6602 Footprints and Symbols
LTC6602 - DC1304A_A Linduino .INO File
LTC6602 - Linduino Header File
LTC6602 - Linduino.CPP File