OPA3684IDBQT ,Low-Power, Triple Current Feedback Operational Amplifier with DisableFEATURES APPLICATIONS* MINIMAL BANDWIDTH CHANGE VERSUS GAIN * RGB LINE DRIVERS* 170MHz BANDWIDTH: G ..
OPA3684IDRG4 ,Low-Power, Triple Current Feedback Operational Amplifier with Disable 14-SOIC -40 to 85.PIN CONFIGURATIONTop View SSOPTop View SODIS ADIS A 1 14 Output C 1 16 Output CDIS BDIS B 2 13 –In ..
OPA3690 ,Triple, Wideband, Voltage-Feedback Operational Amplifier with DisableELECTRICAL CHARACTERISTICS: V = ±5V (continued)SBoldface limits are tested at +25°C.At R = 402Ω for ..
OPA3690 ,Triple, Wideband, Voltage-Feedback Operational Amplifier with DisableELECTRICAL CHARACTERISTICS: V = ±5VSBoldface limits are tested at +25°C.At R = 402Ω for G = +2, (se ..
OPA3690ID ,Triple, Wideband, Voltage-Feedback Operational Amplifier with DisableThis integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated cir ..
OPA3690IDBQT ,Triple, Wideband, Voltage-Feedback Operational Amplifier with DisableMAXIMUM RATINGSOver operating free-air temperature range, unless otherwise noted.OPA3690 UNITPower ..
P8051AHP , MCS51 8-BIT CONTROL-ORIENTED MICROCONTROLLERS
P8051AHP , MCS51 8-BIT CONTROL-ORIENTED MICROCONTROLLERS
P8085AH-1 , 8-Bit HMOS MICROPROCESSORS 3MHz, 5 MHz and 6 MHz Selections Avallable
P8095BH , COMMERCIAL/EXPRESS HMOS MICROCONTROLLER
P80C152JA , UNIVERSAL COMMUNICATION CONTROLLER 8-BIT MICROCONTROLLER
P80C152JC , UNIVERSAL COMMUNICATION CONTROLLER 8-BIT MICROCONTROLLER
OPA3684-OPA3684ID-OPA3684IDBQT-OPA3684IDRG4
Low-Power, Triple Current Feedback Operational Amplifier with Disable
www.ti.com
OPA3684Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SBOS241C – MAY 2002 – REVISED JULY 2008
Low-Power, Triple Current-Feedback
OPERATIONAL AMPLIFIER With Disable
FEA TURES MINIMAL BANDWIDTH CHANGE VERSUS GAIN 170MHz BANDWIDTH: G = +2 > 120MHz BANDWIDTH TO GAIN > +10 LOW DISTORTION: < –82dBc at 5MHz HIGH OUTPUT CURRENT: 120mA SINGLE +5V TO +12V SUPPLY OPERATION DUAL ±2.5V TO ±6.0V SUPPLY OPERATION LOW SUPPLY CURRENT: 1.7mA/ch LOW SHUTDOWN CURRENT: 100μA/ch
DESCRIPTIONThe OPA3684 provides a new level of performance in low-power,
wideband, current-feedback (CFB) amplifiers. This CFBPLUS am-
plifier among the first to use an internally closed-loop input buffer
stage that enhances performance significantly over earlier low-
power CFB amplifiers. While retaining the benefits of very low
power operation, this new architecture provides many of the
benefits of a more ideal CFB amplifier. The closed-loop input stage
buffer gives a very low and linearized impedance path at the
inverting input to sense the feedback error current. This improved
inverting input impedance retains exceptional bandwidth to much
higher gains and improves harmonic distortion over earlier solu-
tions limited by inverting input linearity. Beyond simple high-gain
applications, the OPA3684 CFBPLUS amplifier permits the gain
setting element to be set with considerable freedom from amplifier
bandwidth interaction. This allows frequency response peaking
elements to be added, multiple input inverting summing circuits to
APPLICATIONS RGB LINE DRIVERS LOW-POWER BROADCAST VIDEO DRIVERS EQUALIZING FILTERS MULTICHANNEL SUMMING AMPLIFIERS PROFESSIONAL CAMERAS ADC INPUT DRIVERShave greater bandwidth, and low-power line drivers to meet the
demanding requirements of studio cameras and broadcast video.
The output capability of the OPA3684 also sets a new mark in
performance for low-power current-feedback amplifiers. Delivering
a full ±4Vp-p swing on ±5V supplies, the OPA3684 also has the
output current to support > ±3Vp-p into 50Ω. This minimal output
headroom requirement is complemented by a similar 1.2V input
stage headroom giving exceptional capability for single +5V opera-
tion.
The OPA3684’s low 1.7mA/ch supply current is precisely trimmed
at 25°C. This trim, along with low shift over temperature and supply
voltage, gives a very robust design over a wide range of operating
conditions. 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 OPA3684 supply
current drops to less than 100μA/ch while the I/O pins go to a high
impedance state.
Patent Pending
