The OPA27 and OPA37 are ultra-low noise, high-precision monolithic operational amplifiers.
Laser-trimmed thin-film resistors provide excellent long-term voltage offset stability and allow superior voltage offset compared to common zener-zap techniques.
A unique bias current cancellation circuit allows bias and offset current specifications to be met over the full –40°C to +85°C temperature range.
The OPA27 is internally compensated for unity-gain stability. The decompensated OPA37 requires a closed-loop gain 
5.
The Texas Instruments’ OPA27 and OPA37 are improved replacements for the industry-standard OP-27 and OP-37.
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| Number of channels | 1 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) | 44 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) | 8 |
| Vos (offset voltage at 25°C) (max) (mV) | 0.22 |
| GBW (typ) (MHz) | 63 |
| Features | Decompensated |
| Slew rate (typ) (V/µs) | 11.9 |
| Rail-to-rail | No |
| Offset drift (typ) (µV/°C) | 0.4 |
| Iq per channel (typ) (mA) | 3.3 |
| Vn at 1 kHz (typ) (nV√Hz) | 3.2 |
| CMRR (typ) (dB) | 122 |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 85 |
| Input bias current (max) (pA) | 80000 |
| Iout (typ) (A) | 0.025 |
| Architecture | Bipolar |
| Input common mode headroom (to negative supply) (typ) (V) | 3.2 |
| Input common mode headroom (to positive supply) (typ) (V) | -3.2 |
| Output swing headroom (to negative supply) (typ) (V) | 1.2 |
| Output swing headroom (to positive supply) (typ) (V) | -1.2 |
| PDIP (P) | 8 | 92.5083 mm² 9.81 x 9.43 |
| SOIC (D) | 8 | 29.4 mm² 4.9 x 6 |
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