The OPA2691 sets a new level of performance for broadband dual current-feedback op amps. Operating on a very low 5.1mA/ch supply current, the OPA2691 offers a slew rate and output power normally associated with a much higher supply current. A new output stage architecture delivers a high output current with minimal voltage headroom and crossover distortion. This gives exceptional single-supply operation. Using a single +5V supply, the OPA2691 can deliver a 1V to 4V output swing with over 150mA drive current and 190MHz bandwidth. This combination of features makes the OPA2691 an ideal RGB line driver or single-supply Analog-to-Digital Converter (ADC) input driver.
The OPA2691s low 5.1mA/ch supply current is precisely trimmed at 25°C. This trim, along with low drift over temperature, ensures lower maximum supply current than competing products. System power may be further reduced by using the optional disable control pin (SO-14 only). Leaving this disable pin open, or holding it HIGH, gives normal operation. If pulled LOW, the OPA2691 supply current drops to less than 150 µA/ch while the output goes into a high impedance state. This feature may be used for power savings.
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| Architecture | Current FB |
| Number of channels | 2 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) | 4 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) | 12 |
| GBW (typ) (MHz) | 280 |
| BW at Acl (MHz) | 280 |
| Acl, min spec gain (V/V) | 1 |
| Slew rate (typ) (V/µs) | 2100 |
| Vn at flatband (typ) (nV√Hz) | 1.7 |
| Vn at 1 kHz (typ) (nV√Hz) | 1.7 |
| Iq per channel (typ) (mA) | 5.1 |
| Vos (offset voltage at 25°C) (max) (mV) | 3 |
| Rail-to-rail | No |
| Features | Shutdown |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 85 |
| CMRR (typ) (dB) | 56 |
| Input bias current (max) (pA) | 35000000 |
| Offset drift (typ) (µV/°C) | 20 |
| Iout (typ) (mA) | 190 |
| 2nd harmonic (dBc) | 70 |
| 3rd harmonic (dBc) | 74 |
| Frequency of harmonic distortion measurement (MHz) | 5 |
| SOIC (D) | 8 | 29.4 mm² 4.9 x 6 |
| SOIC (D) | 14 | 51.9 mm² 8.65 x 6 |