OPA859 1.8 GHz Unity-Gain Bandwidth, 3.3 nV/√Hz, FET Input Amplifier | TI.com

OPA859 (ACTIVE)

1.8 GHz Unity-Gain Bandwidth, 3.3 nV/√Hz, FET Input Amplifier

 

Description

The OPA859 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 0.9-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths in low-capacitance photodiode applications.

The graph below shows the bandwidth and noise performance of the OPA859 as a function of the photodiode capacitance when the amplifier is set 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 OPA859 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA859 is optimized to operate in optical time-of-flight (ToF) systems where the OPA859 is used with time-to-digital converters, such as the TDC7201. Use the OPA859 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 Unity-Gain Bandwidth: 1.8 GHz
  • Gain Bandwidth Product: 900 MHz
  • Ultra-Low Bias Current MOSFET Inputs: 10 pA
  • Low Input Voltage Noise: 3.3 nV/√Hz
  • Slew Rate: 1150 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
  • Package: 8-Pin WSON
  • Temperature Range: –40 to +125°C

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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 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
OPA859 OPA855 OPA857 OPA857-DIE OPA858
FET
Voltage FB    
Bipolar
Voltage FB    
FET
Voltage FB    
FET
Voltage FB    
FET
Voltage FB    
1     1     1     1     1    
3.3     3.3     2.3     2.3     3.3    
5.25     5.25     3.6     3.6     5.25    
1800     2500     130     130     1200    
1     7         7    
1150     2750     220     220     2000    
3.3     0.98     4.5       2.5    
12.1     1.9     7       25    
20.5     19.5     23.4     23.4     20.5    
5     2.5     10       2.5    
No     No     No     No     No    
Shutdown     Decompensated
Shutdown    
   
   
Decompensated
Shutdown    
Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 85     -40 to 85     -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)    
84     100         80    
5     18500000     20     20     5    
-2     1.25         1.5    
900     8000     6800     6800     5500    
76     80     20     20     80    
90     80     94     94     80    
86