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

OPA858 (ACTIVE)

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

5.5 GHz Gain Bandwidth Product, Decompensated Transimpedance Amplifier with FET Input - OPA858
 

Description

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.

Features

  • 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

All trademarks are the property of their respective owners.

View more

Parametrics Compare all products in High-speed op amps (GBW>=50MHz)

 
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 1kHz (Typ) (nV/rtHz)
Iq per channel (Typ) (mA)
Vos (Offset Voltage @ 25C) (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
OPA858 OPA855 OPA857 OPA859
FET
Voltage FB    
Bipolar
Voltage FB    
FET
Voltage FB    
FET
Voltage FB    
1     1     1     1    
3.3     3.3     2.3     3.3    
5.25     5.25     3.6     5.25    
1200     2500     130     900    
7     7       1    
2000     2750     220     1150    
2.5     0.98     4.5     3.3    
25     1.9     7     12.1    
20.5     17     23.4     20    
2.5     2.5     10     0.8    
No     No     No     No    
Decompensated
Shutdown    
Decompensated
Shutdown    
N/A     Shutdown    
Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 95     -40 to 125    
WSON | 8     WSON | 8     VQFN | 16     WSON | 8    
See datasheet (WSON)     See datasheet (WSON)     16VQFN: 9 mm2: 3 x 3 (VQFN | 16)     See datasheet (WSON)    
80     100       84    
5     18500000     20     5    
1.5     1.25       -2    
5500     8000     6800     1800    
80     80     20     76    
80     80     94     90    
86     86     97     86    
10     10     10