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) |
2.2 |
Vos (offset voltage at 25°C) (max) (mV) |
0.05 |
Offset drift (typ) (µV/°C) |
0.15 |
Input bias current (max) (pA) |
1 |
GBW (typ) (MHz) |
40 |
Features |
EMI Hardened, Zero Crossover, e-Trim™ |
Slew rate (typ) (V/µs) |
30 |
Rail-to-rail |
In, Out |
Iq per channel (typ) (mA) |
3.8 |
Vn at 1 kHz (typ) (nV√Hz) |
9.8 |
CMRR (typ) (dB) |
120 |
Rating |
Catalog |
Operating temperature range (°C) |
-40 to 125 |
Iout (typ) (A) |
0.065 |
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) |
0.005 |
Output swing headroom (to positive supply) (typ) (V) |
0.005 |
THD + N at 1 kHz (typ) (%) |
0.0001 |
SOT-23 (DBV)-5-8.12 mm² 2.9 x 2.8
The single-channel OPA328, dual-channel OPA2328 and quad-channel OPA4328 (OPAx328) are a new generation family of precision, low-voltage CMOS operational amplifiers optimized for very low noise and wide bandwidth.
The OPAx328 have a linear input stage with zero-crossover distortion that delivers excellent common-mode rejection ratio (CMRR) of 120dB (typical) over the full input range. The input common-mode voltage range extends 100mV beyond the negative and positive supply rails. The output voltage typically swings within 10mV of the rails.
The OPAx328 also 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.
Low-noise (6.1nV/√Hz) and high-speed operation (40MHz, 30V/µs) make these devices a great choice for driving sampling analog-to-digital converters (ADCs).
The OPAx328 are also a great choice for high-impedance-input, single-supply applications. Low input bias current and low input capacitance allows for high-frequency transimpedance gains at low photocurrent operation (< 1nA).
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