The OPA344 and OPA345 series rail-to-rail CMOS operational amplifiers are designed for precision, low-power, miniature applications. The OPA344 is unity gain stable, while the OPA345 is optimized for gains greater than or equal to five, and has a gain-bandwidth product of 3MHz.
The OPA344 and OPA345 are optimized to operate on a single supply from 2.5V and up to 5.5V with an input common-mode voltage range that extends 300mV beyond the supplies. Quiescent current is only 250µA (max).
Rail-to-rail input and output make them ideal for driving sampling analog-to-digital converters. They are also well suited for general purpose and audio applications and providing I/V conversion at the output of D/A converters. Single, dual and quad versions have identical specs for design flexibility.
A variety of packages are available. All are specified for operation from –40°C to 85°C. A SPICE macromodel for design analysis is available for download from www.ti.com.
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| Number of channels | 4 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) | 5.5 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) | 2.5 |
| Rail-to-rail | In, Out |
| GBW (typ) (MHz) | 1 |
| Slew rate (typ) (V/µs) | 0.8 |
| Vos (offset voltage at 25°C) (max) (mV) | 1 |
| Iq per channel (typ) (mA) | 0.15 |
| Vn at 1 kHz (typ) (nV√Hz) | 30 |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 85 |
| Offset drift (typ) (µV/°C) | 3 |
| Input bias current (max) (pA) | 1 |
| CMRR (typ) (dB) | 92 |
| Iout (typ) (A) | 0.015 |
| Architecture | CMOS |
| Input common mode headroom (to negative supply) (typ) (V) | -0.3 |
| Input common mode headroom (to positive supply) (typ) (V) | 0.3 |
| Output swing headroom (to negative supply) (typ) (V) | 0.001 |
| Output swing headroom (to positive supply) (typ) (V) | -0.001 |
| SOIC (D) | 14 | 51.9 mm² 8.65 x 6 |
| TSSOP (PW) | 14 | 32 mm² 5 x 6.4 |
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