| Architecture | Current FB |
| Number of channels (#) | 1 |
| Total supply voltage (Min) (+5V=5, +/-5V=10) | 4 |
| Total supply voltage (Max) (+5V=5, +/-5V=10) | 12 |
| GBW (Typ) (MHz) | 280 |
| BW @ Acl (MHz) | 280 |
| Acl, min spec gain (V/V) | 1 |
| Slew rate (Typ) (V/us) | 2100 |
| Vn at flatband (Typ) (nV/rtHz) | 1.7 |
| Vn at 1 kHz (Typ) (nV/rtHz) | 1.7 |
| Iq per channel (Typ) (mA) | 5.1 |
| Vos (offset voltage @ 25 C) (Max) (mV) | 2.5 |
| 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) (uV/C) | 20 |
| Output current (Typ) (mA) | 190 |
| 2nd harmonic (dBc) | 70 |
| 3rd harmonic (dBc) | 74 |
| Frequency of harmonic distortion measurement (MHz) | 5 |
- FLEXIBLE SUPPLY RANGE:
????+5V to +12V Single-Supply
????±2.5V to ±6V Dual-Supply - UNITY-GAIN STABLE: 280MHz (G =1)
- HIGH OUTPUT CURRENT: 190mA
- OUTPUT VOLTAGE SWING: ±4.0V
- HIGH SLEW RATE: 2100V/μs
- LOW dG/d
: 0.07%/0.02° - LOW SUPPLY CURRENT: 5.1mA
- LOW DISABLED CURRENT: 150μA
- WIDEBAND +5V OPERATION: 190MHz (G = +2)
- APPLICATIONS
- xDSL LINE DRIVER
- BROADBAND VIDEO BUFFERS
- HIGH-SPEED IMAGING CHANNELS
- PORTABLE INSTRUMENTS
- ADC BUFFERS
- ACTIVE FILTERS
- WIDEBAND INVERTING SUMMING
- HIGH SFDR IF AMPLIFIER
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The OPA691 sets a new level of performance for broadband current feedback op amps. Operating on a very low 5.1mA supply current, the OPA691 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 OPA691 can deliver a 1V to 4V output swing with over 150mA drive current and 190MHz bandwidth. This combination of features makes the OPA691 an ideal RGB line driver or single-supply Analog-to-Digital Converter (ADC) input driver.
The OPA691?s low 5.1mA 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. Leaving this disable pin open, or holding it HIGH, gives normal operation. If pulled LOW, the OPA691 supply current drops to less than 150μA while the output goes into a high impedance state. This feature may be used for power savings.
