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TI(德州仪器) OPA2691
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  • TI(德州仪器) OPA2691
  • TI(德州仪器) OPA2691
  • TI(德州仪器) OPA2691
  • TI(德州仪器) OPA2691
  • TI(德州仪器) OPA2691
  • TI(德州仪器) OPA2691
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OPA2691

OPA2691

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具有禁用功能的双路宽带电流反馈运算放大器

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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 OPA2691’s 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.

  • FLEXIBLE SUPPLY RANGE:
       +5V to +12V Single Supply
       ±2.5V to ±6V Dual Supply
  • WIDEBAND +5V OPERATION: 190MHz (G =+2)
  • UNITY-GAIN STABLE: 280MHz (G =1)
  • HIGH OUTPUT CURRENT: 190mA
  • OUTPUT VOLTAGE SWING: ±4.0V
  • HIGH SLEW RATE: 2100V/µs
  • LOW SUPPLY CURRENT: 5.1mA/ch
  • LOW DISABLED CURRENT: 150 µA/ch
  • APPLICATIONS
    • xDSL LINE DRIVER/RECEIVER
    • MATCHED I/Q CHANNEL AMPLIFIER
    • BROADBAND VIDEO BUFFERS
    • HIGH-SPEED IMAGING CHANNELS
    • PORTABLE INSTRUMENTS
    • DIFFERENTIAL ADC DRIVERS
    • ACTIVE FILTERS
    • WIDEBAND INVERTING SUMMING

All trademarks are the property of their respective owners.

ArchitectureCurrent FB
Number of channels2
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-railNo
FeaturesShutdown
RatingCatalog
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)829.4 mm² 4.9 x 6
SOIC (D)1451.9 mm² 8.65 x 6
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