1. Products
  2. Amplifiers
  3. Differential Amplifiers and ADC Drivers
  4. Fully Differential Amplifiers
  5. LT6600-2.5


Features and Benefits

  • ±0.6dB (Max) Ripple 4th Order Lowpass Filter with
    2.5MHz Cutoff
  • Programmable Differential Gain via Two External Resistors
  • Adjustable Output Common Mode Voltage
  • Operates and Specified with 3V, 5V, ±5V Supplies
  • 86dB S/N with 3V Supply and 1VRMS Output
  • Low Distortion, 1VRMS, 800Ω
    Load 1MHz: 95dBc 2nd, 88dBc 3rd
  • Fully Differential Inputs and Outputs
  • Compatible with Popular Differential Amplifier Pinouts
  • SO-8 and DFN-12 Packages

Product Details

The LT6600-2.5 combines a fully differential amplifier with a 4th order 2.5MHz lowpass filter approximating a Chebyshev frequency response. Most differential amplifiers require many precision external components to tail or gain and bandwidth. In contrast, with the LT6600-2.5, two external resistors program differential gain, and the filter’s 2.5MHz cutoff frequency and passband ripple are internally set. The LT6600-2.5 also provides the necessary level shifting to set its output common mode voltage to accommodate the reference voltage requirements of A/Ds.

Using a proprietary internal architecture, the LT6600-2.5 integrates an antialiasing filter and a differential amplifier/driver without compromising distortion or low noise performance. At unity gain the measured in band signal-to- noise ratio is an impressive 86dB. At higher gains the input referred noise decreases so the part can process smaller input differential signals without significantly degrading the output signal-to-noise ratio.

The LT6600-2.5 also features low voltage operation. The differential design provides outstanding performance for a 4VP-P signal level while the part operates with a single 3V supply. The LT6600-2.5 is available in SO-8 and DFN-12 packages.

For similar devices with higher cutoff frequency, refer to the LT6600-5, LT6600-10, LT6600-15 and LT6600-20 data sheets.


  • High Speed ADC Antialiasing and DAC Smoothing in Networking or Cellular Basestation Applications
  • High Speed Test and Measurement Equipment
  • Medical Imaging
  • Drop-in Replacement for Differential Amplifiers

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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Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LT6600CDF-2.5#PBF Material Declaration Reliability Data 12-Lead DFN (4mm x 4mm w/ EP)
LT6600CDF-2.5#TRPBF Material Declaration Reliability Data 12-Lead DFN (4mm x 4mm w/ EP)
LT6600CS8-2.5#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LT6600CS8-2.5#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LT6600IDF-2.5#PBF Material Declaration Reliability Data 12-Lead DFN (4mm x 4mm w/ EP)
LT6600IDF-2.5#TRPBF Material Declaration Reliability Data 12-Lead DFN (4mm x 4mm w/ EP)
LT6600IS8-2.5#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LT6600IS8-2.5#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
Wafer Fabrication Data R460 Reliability Data

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.