OPA847 Wideband, Ultra-Low Noise,Voltage Feedback Operational Amplifier with Shutdown | TI.com

OPA847 (ACTIVE)

Wideband, Ultra-Low Noise,Voltage Feedback Operational Amplifier with Shutdown

 

Description

The OPA847 combines very high gain bandwidth and large signal performance with an ultra-low input noise voltage (0.85nV/√Hz) while using only 18mA supply current. Where power saving is critical, the OPA847 also includes an optional power shutdown pin that, when pulled low, disables the amplifier and decreases the supply current to < 1% of the powered-up value. This optional feature may be left disconnected to ensure normal amplifier operation when no power-down is required.

The combination of very low input voltage and current noise, along with a 3.9GHz gain bandwidth product, make the OPA847 an ideal amplifier for wideband transimpedance applications. As a voltage gain stage, the OPA847 is optimized for a flat frequency response at a gain of +20V/V and is stable down to gains as low as +12V/V. New external compensation techniques allow the OPA847 to be used at any inverting gain with excellent frequency response control. Using this technique in a differential Analog-to-Digital Converter (ADC) interface application, shown below, can deliver one of the highest dynamic range interfaces available.

Features

  • HIGH GAIN BANDWIDTH: 3.9GHz
  • LOW INPUT VOLTAGE NOISE: 0.85nV/√Hz
  • VERY LOW DISTORTION: –105dBc (5MHz)
  • HIGH SLEW RATE: 950V/µs
  • HIGH DC ACCURACY: VIO < ±100µV
  • LOW SUPPLY CURRENT: 18.1mA
  • LOW SHUTDOWN POWER: 2mW
  • STABLE FOR GAINS 12
  • APPLICATIONS
    • HIGH DYNAMIC RANGE ADC PREAMPS
    • LOW NOISE, WIDEBAND, TRANSIMPEDANCE AMPLIFIERS
    • WIDEBAND, HIGH GAIN AMPLIFIERS
    • LOW NOISE DIFFERENTIAL RECEIVERS
    • ULTRASOUND CHANNEL AMPLIFIERS
    • IMPROVED UPGRADE FOR THE OPA687, CLC425, AND LMH6642

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Parametrics

Compare all products in High-speed op amps (GBW>=50MHz) Email Download to Excel
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
OPA847 Order now Bipolar
Voltage FB    
1     10     12     600     12     950     0.85     0.85     18.1     0.5     No     Decompensated     Catalog     -40 to 85     SOIC | 8
SOT-23 | 6    
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
110     39000000     1.5     3900     75     74     100     5    
OPA842 Order now Bipolar
Voltage FB    
1     7     12     350     1     400     2.7     2.6     20.2     1.2     No    
   
Catalog     -40 to 85     SOIC | 8
SOT-23 | 5    
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)    
95     35000000     4     350     100     80     97     5    
OPA843 Order now Bipolar
Voltage FB    
1     8     12     500     3     1000     2     2     20.2     1.2     No     Decompensated     Catalog     -40 to 85     SOIC | 8
SOT-23 | 5    
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)    
95     35000000     4     1500     100     76