OPA2837 Dual, Low-Power, Precision, Rail-to-Rail Output, 105MHz, Voltage Feedback Amplifier | TI.com

OPA2837 (ACTIVE)

Dual, Low-Power, Precision, Rail-to-Rail Output, 105MHz, Voltage Feedback Amplifier

Dual, Low-Power, Precision, Rail-to-Rail Output, 105MHz, Voltage Feedback Amplifier - OPA2837
 

Description

The OPA837 and OPA2837 are single- and dual-channel unity-gain stable, voltage-feedback amplifiers that provide among the highest MHz per mW of bandwidth versus power among precision op amps. Using only 600 µA per channel on a single 5-V supply, these 3.0-mW devices deliver 105-MHz bandwidth at a gain of 1 V/V. The very low trimmed offset voltage of ±130 µV (maximum) comes with a typical (±1σ) drift of ±0.4 µV/°C.

Ideally suited to single-ended, successive-approximation register (SAR) analog-to-digital-converter (ADC) driving applications, the OPAx837 provides one of the lowest input spot noise levels at 4.7 nV/√Hz for the 3-mW quiescent power. The very high 50-MHz gain bandwidth product provides the low output impedance to high frequencies required to supply the fast charging currents in SAR ADC driver applications. This low dynamic output impedance is also suitable for reference buffer applications with precision ADCs. The single-channel OPA837 is available in a 6-pin SOT-23 package (that includes a power shutdown feature) and a 5-pin SC70 package whereas the dual-channel OPA2837 is available in an 8-pin VSSOP package.

The OPAx837 is characterized for operation over the a wide temperature range of –40°C to +125°C.

Features

  • Bandwidth: 105 MHz (AV = 1 V/V)
  • Very Low (Trimmed) Supply Current: 600 µA
  • Gain Bandwidth Product: 50 MHz
  • Slew Rate: 105 V/µs
  • Negative Rail Input, Rail-to-Rail Output
  • Single-Supply Operating Range: 2.7 V to 5.4 V
  • 25°C Input Offset: ±130 µV (Max)
  • Input Offset Voltage Drift (DCK Package):
    < ±1.6 µV/°C (Maximum)
  • Input Voltage Noise: 4.7 nV/√Hz (> 100 Hz)
  • HD2: –120 dBc at 2 VPP, 100 kHz
  • HD3: –145 dBc at 2 VPP, 100 kHz
  • Settling Time: 35 ns, 0.5-V Step to 0.1%
  • 5-µA Shutdown Current With Fast Recovery From
    Shutdown for Power Scaling Applications

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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
OPA2837 OPA2836 OPA837
Voltage FB     Bipolar
Voltage FB    
Voltage FB    
2     2     1    
2.7     2.5     2.7    
5.4     5.5     5.4    
105     205     105    
1     1     1    
105     560     105    
4.7     4.6     4.7    
4.7     4.6     4.7    
0.592     1     0.592    
0.13     0.4     0.13    
In to V-     In to V-
Out    
In to V-
Out    
  Small Size
Shutdown    
Small Size
Shutdown    
Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125    
QFN | 10
VSSOP | 8    
QFN | 10
SOIC | 8
UQFN | 10
VSSOP | 10    
SC70 | 5
SOT-23 | 6    
10QFN: 4 mm2: 2 x 2 (QFN | 10)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
10QFN: 4 mm2: 2 x 2 (QFN | 10)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
10UQFN: 4 mm2: 2 x 2 (UQFN | 10)
10VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 10)    
5SC70: 4 mm2: 2.1 x 2 (SC70 | 5)
6SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 6)    
110     116     110    
520000     1000000     520000    
0.4     1.1     0.4    
50     120     50    
50     50     50    
120     85     120    
145     79     145    
0.1     1     0.1    

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