OPA857 Ultralow-Noise, Wideband, Pseudo-Differential Output Transimpedance Amplifier | TI.com

OPA857 (ACTIVE)

Ultralow-Noise, Wideband, Pseudo-Differential Output Transimpedance Amplifier

Ultralow-Noise, Wideband, Pseudo-Differential Output Transimpedance Amplifier - OPA857
 

Description

The OPA857 is a wideband, fast overdrive recovery, fast-settling, ultralow-noise transimpedance amplifier targeted at photodiode monitoring applications. With selectable feedback resistance, the OPA857 simplifies the design of high-performance optical systems. Very fast overload recovery time and internal input protection provide the best combination to protect the remainder of the signal chain from overdrive while minimizing recovery time. The two selectable transimpedance gain configurations allow high dynamic range and flexibility required in modern transimpedance amplifier applications. The OPA857 is available in a 3-mm × 3-mm VQFN package.

The device is characterized for operation over the full industrial temperature range from –40°C to +85°C.

Features

  • Internal Midscale Reference Voltage
  • Pseudo-Differential Output Voltage
  • Wide Dynamic Range
  • Closed-Loop Transimpedance Bandwidth:
    • 125 MHz (5-kΩ Transimpedance Gain,
      1.5-pF External Parasitic Capacitance)
    • 105 MHz (20-kΩ Transimpedance Gain,
      1.5-pF External Parasitic Capacitance)
  • Ultralow Input-Referred Current Noise
    (Brickwall Filter BW = 135 MHz):
    15 nARMS (20-kΩ Transimpedance)
  • Very Fast Overload Recovery Time: < 25 ns
  • Internal Input Protection Diode
  • Power Supply:
    • Voltage: 2.7 V to 3.6 V
    • Current: 23.4 mA
  • Extended Temperature Range: –40°C to +85°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 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
OPA857 OPA656 OPA855 OPA858 OPA859
FET
Voltage FB    
FET
Voltage FB    
Bipolar
Voltage FB    
FET
Voltage FB    
FET
Voltage FB    
1     1     1     1     1    
2.3     8     3.3     3.3     3.3    
3.6     12     5.25     5.25     5.25    
130     500     2500     1200     900    
  1     7     7     1    
220     290     2750     2000     1150    
4.5     7     0.98     2.5     3.3    
7     10     1.9     25     12.1    
23.4     14     17     20.5     20    
10     0.6     2.5     2.5     0.8    
No     No     No     No     No    
N/A     N/A     Decompensated
Shutdown    
Decompensated
Shutdown    
Shutdown    
Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 95     -40 to 85     -40 to 125     -40 to 125     -40 to 125    
VQFN | 16     SOIC | 8
SOT-23 | 5    
WSON | 8     WSON | 8     WSON | 8    
16VQFN: 9 mm2: 3 x 3 (VQFN | 16)     8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)    
See datasheet (WSON)     See datasheet (WSON)     See datasheet (WSON)    
  86     100     80     84    
20     5     18500000     5     5    
  2     1.25     1.5     -2    
6800     500     8000     5500     1800    
20     70     80     80     76