OPA838 Texas instruments

OPA838

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OPA838

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Описание

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.

Gain Bandwidth Product: 300 MHz
Very-Low (Trimmed) Supply Current: 950 µA
Bandwidth: 90 MHz (A_V = 6 V/V)
High Full-Power Bandwidth: 45 MHz, 4 V_PP
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

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)	300
BW at Acl (MHz)	90
Acl, min spec gain (V/V)	6
Slew rate (typ) (V/µs)	350
Vn at flatband (typ) (nV√Hz)	1.8
Vn at 1 kHz (typ) (nV√Hz)	1.8
Iq per channel (typ) (mA)	0.96
Vos (offset voltage at 25°C) (max) (mV)	0.125
Rail-to-rail	In to V-, Out
Features	Decompensated, Shutdown
Rating	Catalog
Operating temperature range (°C)	-40 to 125
CMRR (typ) (dB)	105
Input bias current (max) (pA)	4400000
Offset drift (typ) (µV/°C)	0.4
Iout (typ) (mA)	20
2nd harmonic (dBc)	-110
3rd harmonic (dBc)	-120
Frequency of harmonic distortion measurement (MHz)	1