The OPA843 provides a level of speed and dynamic range previously unattainable in a monolithic op amp. Using a high Gain Bandwidth (GBW), two gain-stage design, the OPA843 gives a medium gain range device with exceptional dynamic range. The "classic" differential input complements this high dynamic range with DC precision beyond most high-speed amplifier products. Very low input offset voltage and current, high Common-Mode Rejection Ratio (CMRR) and Power-Supply Rejection Ratio (PSRR), and high open-loop gain combine to give a high DC precision amplifier along with low noise and high 3rd-order intercept.
12- to 16-bit converter interfaces will benefit from this combination of features. High-speed transimpedance applications can be implemented with exceptional DC precision as well. Differential configurations using two OPA843s can deliver very low distortion to high output voltages, as shown below.
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| Architecture | Voltage FB |
| Number of channels | 1 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) | 8 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) | 12 |
| GBW (typ) (MHz) | 800 |
| BW at Acl (MHz) | 500 |
| Acl, min spec gain (V/V) | 3 |
| Slew rate (typ) (V/µs) | 1000 |
| Vn at flatband (typ) (nV√Hz) | 2 |
| Vn at 1 kHz (typ) (nV√Hz) | 2 |
| Iq per channel (typ) (mA) | 20.2 |
| Vos (offset voltage at 25°C) (max) (mV) | 1.2 |
| Rail-to-rail | No |
| Features | Decompensated |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 85 |
| CMRR (typ) (dB) | 95 |
| Input bias current (max) (pA) | 35000000 |
| Offset drift (typ) (µV/°C) | 4 |
| Iout (typ) (mA) | 100 |
| 2nd harmonic (dBc) | 76 |
| 3rd harmonic (dBc) | 102 |
| Frequency of harmonic distortion measurement (MHz) | 5 |
| SOIC (D) | 8 | 29.4 mm² 4.9 x 6 |
| SOT-23 (DBV) | 5 | 8.12 mm² 2.9 x 2.8 |
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