OPA837 Texas instruments

OPA837

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OPA837

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Описание

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 and a 10-pin WQFN package.The OPAx837 is characterized for operation over the a wide temperature range of –40°C to +125°C.

Bandwidth: 105 MHz (A_V = 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 V_PP, 100 kHz
HD3: –145 dBc at 2 V_PP, 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

Architecture	Voltage FB
Number of channels	1
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)	2.7
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)	5.4
GBW (typ) (MHz)	50
BW at Acl (MHz)	105
Acl, min spec gain (V/V)	1
Slew rate (typ) (V/µs)	105
Vn at flatband (typ) (nV√Hz)	4.7
Vn at 1 kHz (typ) (nV√Hz)	4.7
Iq per channel (typ) (mA)	0.592
Vos (offset voltage at 25°C) (max) (mV)	0.165
Rail-to-rail	In to V-, Out
Features	Shutdown
Rating	Catalog
Operating temperature range (°C)	-40 to 125
CMRR (typ) (dB)	110
Input bias current (max) (pA)	520000
Offset drift (typ) (µV/°C)	0.4
Iout (typ) (mA)	50
2nd harmonic (dBc)	120
3rd harmonic (dBc)	145
Frequency of harmonic distortion measurement (MHz)	0.1