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LTC®6268-10 and LTC6269-10 Femtoamp Bias Curr

By Analog Devices Inc 40

LTC®6268-10 and LTC6269-10 Femtoamp Bias Curr

Linear Technology's LTC6268 and LTC6269 FET-input single and dual op-amps deliver outstanding performance for high-speed and high-dynamic range transimpedance amplifier (TIA) and buffer applications. With just 3 fA bias current at 25°C and 4 pA max over the entire -40°C to +125°C temperature range, the LTC6268 / LTC6269 can resolve input currents from several femtoamps to amps.

The LTC6268 / LTC6269is a single/dual 500 MHz 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, CCD output buffers, and high-impedance sensor amplifiers. Its low distortion makes the LTC6268 / LTC6269 an ideal amplifier for driving SAR ADCs.

  # Op-Amps GBW Av Min Stable
LTC6268 1 500 MHz 1 V/V
LTC6268-10 1 500 MHz 1 V/V
LTC6269 2 4 GHz 10 V/V
LTC6269-10 2 4 GHz 10 V/V

LTC6268-10 Features

  • Gain bandwidth product: 4 GHz
  • Low input bias current:
    • ±3 fA typ. room temperature
    • 4 pA max at +125°C
  • Current noise (100 kHz): 7 fA/√Hz
  • Voltage noise (1 MHz): 4.0 nV/√Hz
  • Extremely-low CIN: 0.45 pF
  • Rail-to-rail output
  • AV ≥10
  • Slew rate: +1500 V/μs, -1000 V/μs
  • Supply range: 3.1 V to 5.25 V
  • Quiescent current: 16.5 mA
  • Operating temperature range: -40°C to +125°C
  • Single in 8-lead SO-8, 6-lead TSOT-23 packages
  • Dual in 8-lead MS8, 3 mm x 3 mm 10-lead DFN 10 packages

Video

High Bandwidth, Very Low Input Bias Current Op Amp

Applications

In addition to photodiode and photomultiplier (PMT) circuits, the LTC6268/9 are well suited for other high impedance sensor applications and for driving analog-to-digital converters (ADCs).

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AmplificationSemiconductors & Dev ToolsAnalog Devices Inc

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