4-GHz op amps achieve ultralow input bias current




Features

  • Gain Bandwidth Product: 4GHz
  • Low Input Bias Current:
  • ±3fA Typ. Room Temperature
  • 4pA Max at 125°C
  • Current Noise (100kHz): 7fA/√Hz
  • Voltage Noise (1MHz): 4.0nV/√Hz
  • Extremely Low CIN 0.45pF
  • Rail-to-Rail Output
  • AV ≥10
  • Slew Rate: +1500V/μs, –1000V/μs
  • Supply Range: 3.1V to 5.25V
  • Quiescent Current: 16.5mA
  • Operating Temp Range: –40°C to 125°C
  • Single in 8-Lead SO-8, 6-Lead TSOT-23 Packages
  • Dual in 8-Lead MS8, 3mm × 3mm 10-Lead DFN 10 PackagesUltra-Low Bias Current FET

Description

The LTC®6268-10/LTC6269-10 is a single/dual 4GHz FET-input operational amplifier with extremely low input bias current and low input capacitance. It also features low input-referred current noise and voltage noise making it an ideal choice for high speed transimpedance amplifiers, and high-impedance sensor amplifiers. It is a decompensated op amp that is gain-of-10 stable.

It operates on 3.1V to 5.25V supply and consumes 16.5mA per amplifier. A shutdown feature can be used to lower power consumption when the amplifier is not in use.

The LTC6268-10 single op amp is available in 8-lead SOIC and 6-lead SOT-23 packages. The SOIC package includes two unconnected pins which can be used to create an input pin guard ring to protect against board leakage currents. The LTC6269-10 dual op amp is available in 8-lead MSOP with exposed pad and 3mm × 3mm 10-lead DFN packages. They are fully specified over the –40°C to 85°C and the –40°C to 125°C temperature ranges.


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