0
ACTIVE
Number of channels |
1 |
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) |
5.5 |
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) |
1.7 |
Vos (offset voltage at 25°C) (max) (mV) |
0.045 |
Offset drift (typ) (µV/°C) |
1 |
Input bias current (max) (pA) |
0.8 |
GBW (typ) (MHz) |
1 |
Features |
e-Trim™ |
Slew rate (typ) (V/µs) |
1 |
Rail-to-rail |
In, Out |
Iq per channel (typ) (mA) |
0.0235 |
Vn at 1 kHz (typ) (nV√Hz) |
60 |
CMRR (typ) (dB) |
121 |
Rating |
Catalog |
Operating temperature range (°C) |
-40 to 125 |
Iout (typ) (A) |
0.06 |
Architecture |
CMOS |
Input common mode headroom (to negative supply) (typ) (V) |
-0.1 |
Input common mode headroom (to positive supply) (typ) (V) |
0.1 |
Output swing headroom (to negative supply) (typ) (V) |
0.003 |
Output swing headroom (to positive supply) (typ) (V) |
-0.003 |
THD + N at 1 kHz (typ) (%) |
0.002 |
SOT-SC70 (DCK)-5-4.2 mm² 2 x 2.1
The OPA391, OPA2391, and OPA4391 (OPAx391) devices feature a unique combination of high bandwidth (1MHz) along with very-low quiescent current (24µA) in high-precision amplifiers. These features combined with rail-to-rail input and output make these devices an exceptional choice in high-gain, low-power applications. Ultra-low input bias current of 10fA, only 45µV of offset (maximum), and 1.2µV/°C of drift over temperature help maintain high precision in ratiometric and amperometric sensor front ends that have demanding low-power requirements.
The OPAx391 use Texas Instruments proprietary e‑trim™ operational amplifier technology, enabling a unique combination of ultra-low offset and low input offset drift without the need for any input switching or auto-zero techniques. The CMOS-based technology platform also features a modern, robust output stage design that is tolerant of high output capacitance, alleviating stability problems that are common in typical low-power amplifiers.
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