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

OPA857 (ACTIVE)

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

 

Recommended alternative parts

  • OPA857-DIE  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 

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 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
OPA857 OPA855 OPA857-DIE OPA858 OPA859
FET
Voltage FB    
Bipolar
Voltage FB    
FET
Voltage FB    
FET
Voltage FB    
FET
Voltage FB    
1     1     1     1     1    
2.3     3.3     2.3     3.3     3.3    
3.6     5.25     3.6     5.25     5.25    
130     2500     130     1200     1800    
  7       7     1    
220     2750     220     2000     1150    
4.5     0.98       2.5     3.3    
7     1.9       25     12.1    
23.4     19.5     23.4     20.5     20.5    
10     2.5       2.5     5    
No     No     No     No     No    
   
Decompensated
Shutdown    
   
Decompensated
Shutdown    
Shutdown    
Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 85     -40 to 125     -40 to 85     -40 to 125     -40 to 125    
VQFN | 16     WSON | 8       WSON | 8     WSON | 8    
16VQFN: 9 mm2: 3 x 3 (VQFN | 16)     See datasheet (WSON)       See datasheet (WSON)     See datasheet (WSON)    
  100       80     84    
20     18500000     20     5     5    
  1.25       1.5     -2    
6800     8000     6800     5500     900    
20     80     20     80     76    
94     80     94     80     90    
97