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

OPA838 (ACTIVE)

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)

 
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
OPA838 OPA835 OPA836 OPA837
Bipolar
Voltage FB    
Bipolar
Voltage FB    
Bipolar
Voltage FB    
Voltage FB    
1     1     1     1    
2.7     2.5     2.5     2.7    
5.4     5.5     5.5     5.4    
90     56     205     105    
6     1     1     1    
350     160     560     105    
1.8     9.3     4.6     4.7    
1.8     9.3     4.6     4.7    
0.96     0.25     1     0.592    
0.125     0.5     0.4     0.13    
In to V-
Out    
In to V-
Out    
In to V-
Out    
In to V-
Out    
Small Size
Shutdown    
Small Size
Shutdown    
Small Size
Shutdown    
Small Size
Shutdown    
Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
SC70 | 5
SC70 | 6
SOT-23 | 6    
QFN | 10
SOT-23 | 6    
QFN | 10
SOT-23 | 6    
SC70 | 5
SOT-23 | 6    
5SC70: 4 mm2: 2.1 x 2 (SC70 | 5)
6SC70: 4 mm2: 2.1 x 2 (SC70 | 6)
6SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 6)    
10QFN: 4 mm2: 2 x 2 (QFN | 10)
6SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 6)    
10QFN: 4 mm2: 2 x 2 (QFN | 10)
6SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 6)    
5SC70: 4 mm2: 2.1 x 2 (SC70 | 5)
6SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 6)    
105     113     116     110    
4400000     400000     1000000     520000    
0.4     2.25     1.1     0.4    
300     30     120     50    
20     40     50     50    
-110     70     85     120    
-120     73     79     145    
1     1     1     0.1