OPA858 5.5 GHz Gain Bandwidth Product, Decompensated Transimpedance Amplifier with FET Input | TI.com

This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
5.5 GHz Gain Bandwidth Product, Decompensated Transimpedance Amplifier with FET Input


Recommended alternative parts

  • LMH32401  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   LMH32401 is an integrated TIA with differential outputs for LiDAR applications


The OPA858 is a wideband, low-noise, operational amplifier with CMOS inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 5.5-GHz gain bandwidth product (GBWP) enables applications requiring high closed-loop bandwidths at transimpedance gains in the tens to hundreds of kΩs range.

The graph below demonstrates the bandwidth and noise performance of the OPA858 as a function of the photodiode capacitance when the amplifier is configured as a TIA. The total noise is calculated over a bandwidth range extending from DC to the calculated f-3dB frequency on the left-hand scale. The OPA858 package features a feedback pin (FB) that simplifies the feedback network 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 with the TDC7201 time-to-digital converter. The OPA858 can be used in high-resolution LIDAR systems with a high-speed analog-to-digital converter (ADC) and a differential output amplifier like the THS4541 or LMH5401 to drive the ADC.


  • 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: 0.2 pF
  • Wide Input Common-Mode Range:
    • 1.4 V from Positive Supply
    • Includes Negative Supply
  • 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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Part number Order Number of channels (#) GBW (Typ) (MHz) Total supply voltage (Max) (+5V=5, +/-5V=10) Total supply voltage (Min) (+5V=5, +/-5V=10) Vos (offset voltage @ 25 C) (Max) (mV) Rail-to-rail Features BW @ Acl (MHz) Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) Approx. price (US$)
OPA858 Order now 1     5500     5.25     3.3     2.5     No     Shutdown
1200     -40 to 125     WSON | 8     8WSON: 4 mm2: 2 x 2 (WSON | 8)     2.20 | 1ku    
OPA855 Order now 1     8000     5.25     3.3     2.5     No     Shutdown
2500     -40 to 125     WSON | 8     8WSON: 4 mm2: 2 x 2 (WSON | 8)     2.42 | 1ku    
OPA857 Order now 1     6800     3.6     2.3     10     No     Integrated TIA     130     -40 to 85     VQFN | 16     16VQFN: 9 mm2: 3 x 3 (VQFN | 16)     2.28 | 1ku    
OPA857-DIE Samples not available 1     6800     3.6     2.3       No     Integrated TIA     130     -40 to 85