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5.5 GHz Gain Bandwidth Product, Decompensated Transimpedance Amplifier with FET Input

Availability: 5,879


Package | PIN: WSON (DSG) | 8
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $4.82
10-24 $4.33
25-99 $4.05
100-249 $3.63
250-499 $3.39
500-749 $2.95
750-999 $2.55
1000+ $2.50


  • High Gain Bandwidth Product: 5.5 GHz
  • Decompensated, Gain ≥ 7 V/V (Stable)
  • Ultra-Low Bias Current MOSFET Inputs: 10 pA
  • Low Input Voltage Noise: 2.5 nV/√Hz
  • Slew rate: 2000 V/µs
  • Low Input Capacitance:
    • Common-Mode: 0.6 pF
    • Differential: 0.2pF
  • Wide Input Common-Mode Range:
    • 1.4 V from Positive Supply
    • Includes NegativeSupply
  • 2.5 VPP Output Swing in TIA Configuration
  • Supply Voltage Range: 3.3 V to 5.25 V
  • Quiescent Current: 20.5 mA
  • Available in 8-Pin WSON Package
  • Temperature Range: –40 to +125°C

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Texas Instruments  OPA858IDSGR

The OPA858 is a wideband, low-noise, operational amplifier withCMOS inputs forwideband transimpedance and voltage amplifier applications. When the device is configured as atransimpedance amplifier (TIA), the 5.5-GHzgain bandwidth product (GBWP) enables applications requiring highclosed-loop bandwidths at transimpedance gains in the tens to hundreds of kΩs range.

The graph below demonstrates the bandwidth and noise performance of theOPA858 as a function of the photodiode capacitance when the amplifier isconfigured as a TIA. The total noise is calculated over a bandwidth range extending from DC to thecalculated f-3dB frequency on the left-hand scale. TheOPA858 package features a feedback pin (FB) that simplifies the feedbacknetwork connection between the input and the output.

The OPA858 is optimized for use in optical Time-of-Flight (ToF)systems like the one shown in the figure below where the OPA858 is used withthe TDC7201 time-to-digital converter. TheOPA858 can be used in high-resolution LIDAR systems with a high-speedanalog-to-digital converter (ADC) and a differential output amplifier like theTHS4541 or LMH5401 to drive the ADC.