OPA855 8 GHz Gain Bandwidth Product, Decompensated Transimpedance Amplifier with Bipolar Input | TI.com

OPA855 (ACTIVE)

8 GHz Gain Bandwidth Product, Decompensated Transimpedance Amplifier with Bipolar Input

 

Description

The OPA855 is a wideband, low-noise operational amplifier with bipolar inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 8-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths at transimpedance gains of up to tens of kΩs.

The graph below shows the bandwidth and noise performance of the OPA855 as a function of the photodiode capacitance when the amplifier is configured as a TIA. The total noise is calculated along a bandwidth range extending from dc to the calculated frequency, f, on the left-hand scale. The OPA855 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA855 is optimized to operate in optical time-of-flight (ToF) systems where the OPA855 is used with time-to-digital converters, such as the TDC7201. Use the OPA855 to drive a high-speed analog-to-digital converter (ADC) in high-resolution LIDAR systems with a differential output amplifier, such as the THS4541 or LMH5401.

 

 

Features

  • High Gain Bandwidth Product: 8 GHz
  • Decompensated, Gain ≥ 7 V/V (Stable)
  • Low Input Voltage Noise: 0.98 nV/√Hz
  • Slew Rate: 2750 V/µs
  • Low Input Capacitance:
    • Common-Mode: 0.6 pF
    • Differential: 0.2 pF
  • Wide Input Common-Mode Range:
    • 0.4 V from Positive Supply
    • 1.1 V from Negative Supply
  • 3 VPP Total Output Swing
  • Supply Voltage Range: 3.3 V to 5.25 V
  • Quiescent Current: 17.8 mA
  • Package: 8-Pin WSON
  • Temperature Range: –40 to +125°C

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Parametrics

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Part number Order Architecture Number of channels (#) Total supply voltage (Min) (+5V=5, +/-5V=10) Total supply voltage (Max) (+5V=5, +/-5V=10) BW @ Acl (MHz) Acl, min spec gain (V/V) Slew rate (Typ) (V/us) Vn at flatband (Typ) (nV/rtHz) Vn at 1 kHz (Typ) (nV/rtHz) Iq per channel (Typ) (mA) Vos (offset voltage @ 25 C) (Max) (mV) Rail-to-rail Features Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) CMRR (Typ) (dB) Input bias current (Max) (pA) Offset drift (Typ) (uV/C) GBW (Typ) (MHz) Output current (Typ) (mA) 2nd harmonic (dBc) 3rd harmonic (dBc) @ MHz
OPA855 Order now Bipolar
Voltage FB    
1     3.3     5.25     2500     7     2750     0.98     1.9     19.5     2.5     No     Decompensated
Shutdown    
Catalog     -40 to 125     WSON | 8     See datasheet (WSON)     100     18500000     1.25     8000     80     80     86     10    
OPA857 Order now FET
Voltage FB    
1     2.3     3.6     130       220     4.5     7     23.4     10     No    
   
Catalog     -40 to 85     VQFN | 16     16VQFN: 9 mm2: 3 x 3 (VQFN | 16)       20       6800     20     94     97     10    
OPA857-DIE Samples not available FET
Voltage FB    
1     2.3     3.6     130       220         23.4       No    
   
Catalog     -40 to 85           20       6800     20     94     97     10    
OPA858 Order now FET
Voltage FB    
1     3.3     5.25     1200     7     2000     2.5