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
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   
-40 to 125    -40 to 125    -40 to 125   
QFN
VSSOP   
QFN
SOIC
UQFN
VSSOP   
SC70
SOT-23   
10QFN: 4 mm2: 2 x 2(QFN)
8VSSOP: 15 mm2: 4.9 x 3(VSSOP)   
10QFN: 4 mm2: 2 x 2(QFN)
8SOIC: 29 mm2: 6 x 4.9(SOIC)
10UQFN: 4 mm2: 2 x 2(UQFN)
10VSSOP: 15 mm2: 4.9 x 3(VSSOP)   
5SC70: 4 mm2: 2.1 x 2(SC70)
6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)   
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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