OPA838 1-mA, 300-MHz Gain Bandwidth, Voltage-Feedback Op Amp | TI.com

OPA838
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1-mA, 300-MHz Gain Bandwidth, Voltage-Feedback Op Amp

 

Description

The OPA838 decompensated voltage feedback operational amplifier provides a high 300-MHz gain bandwidth product with 1.8-nV/√Hz input noise voltage, requiring only a trimmed 0.95-mA supply current. These features combine to provide an extremely power-efficient solution for photodiode transimpedance designs and high-voltage gain stages, which require the lowest input voltage noise in signal receiver applications.

Operating at the minimum recommended noninverting gain of 6 V/V results in a 90-MHz, –3-dB bandwidth. Extremely low input noise and offset voltage make the OPA838 particularly suitable for high gains. Even at a DC-coupled gain of 1000 V/V, a 300-kHz signal bandwidth is available with a maximum output offset voltage of ±125 mV.

The single-channel OPA838 is available in 6-pin SOT-23 and SC70 packages with a power shutdown feature and a 5-pin SC70 package.

Features

  • Gain Bandwidth Product: 300 MHz
  • Very-Low (Trimmed) Supply Current: 950 µA
  • Bandwidth: 90 MHz (AV = 6 V/V)
  • High Full-Power Bandwidth: 45 MHz, 4 VPP
  • Negative Rail Input, Rail-to-Rail Output
  • Single-Supply Operating Range: 2.7 V to 5.4 V
  • 25°C Input Offset: ±125 µV (Maximum)
  • Input Offset Voltage Drift: < ±1.6 µV/°C (Maximum)
  • Input Voltage Noise: 1.8 nV/√Hz (> 200 Hz)
  • Input Current Noise: 1 pA/√Hz (> 2000 Hz)
  • < 1-µA Shutdown Current for Power Savings

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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) GBW (Typ) (MHz) 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) Output current (Typ) (mA) 2nd harmonic (dBc) 3rd harmonic (dBc) @ MHz
OPA838 Order now Voltage FB     1     2.7     5.4     300     90     6     350     1.8     1.8     0.96     0.125     In to V-
Out    
Shutdown
Decompensated    
Catalog     -40 to 125     SC70 | 5
SC70 | 6
SOT-23 | 6    
5SC70: 4 mm2: 2.1 x 2 (SC70 | 5)
6SC70: 4 mm2: 2.1 x 2 (SC70 | 6)
6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
105     4400000     0.4     20     -110     -120     1    
OPA2834 Order now Voltage FB     2     2.7     5.4     20     50     1     26     12     12     0.17     1.9     In to V-
Out    
  Catalog     -40 to 125     VSSOP | 8     8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)     104     90000     1.2     20     131     146     0.01    
OPA2835 Order now Voltage FB     2     2.5     5.5     30     56     1     160     9.3     10     0.25     0.5     In to V-
Out    
Shutdown     Catalog     -40 to 125