OPA684IDBVRG4 ,Low-Power, Current Feedback Operational Amplifier With Disable 6-SOT-23 -40 to 85ELECTRICAL CHARACTERISTICS: V = ±5VSR = 1kΩ , R = 100Ω , and G = +2, (See Figure 1 for AC performan ..
OPA684IDBVT ,Low-Power, Current Feedback Operational Amplifier With Disable.PIN CONFIGURATIONTop View SOT23Top View SOOutput 1 6 +VS–V 2 5 DISSNC 1 8 DISNoninverting Input 3 ..
OPA684IDG4 ,Low-Power, Current Feedback Operational Amplifier With Disable 8-SOIC -40 to 85FEATURESOPA684 OPA2684 OPA3684 Low-Power CFBplusOPA691 OPA2691 OPA3691 High Slew Rate CFBOPA695 OPA ..
OPA684IDR ,Low-Power, Current Feedback Operational Amplifier With DisableELECTRICAL CHARACTERISTICS: V = +5VSR = 1.3kΩ , R = 100Ω , and G = +2, (See Figure 3 for AC perform ..
OPA685U ,SpeedPlus Ultra-Wideband, Current-Feedback Operational Amplifier With Disable
OPA686U ,SpeedPlus Wideband, Low Noise, Voltage Feedback Operational Amplifier
P8255A-5 , PROGRAMMABLE PERIPHEAL INTERFACE
P8255A-5 , PROGRAMMABLE PERIPHEAL INTERFACE
P8255A-5 , PROGRAMMABLE PERIPHEAL INTERFACE
P8255A-5 , PROGRAMMABLE PERIPHEAL INTERFACE
P8255A-5 , PROGRAMMABLE PERIPHEAL INTERFACE
P8279 , PROGRAMMABLE KEYBOARD / DISPLAY INTERFACE
OPA684-OPA684ID-OPA684IDBVR-OPA684IDBVRG4-OPA684IDBVT-OPA684IDG4-OPA684IDR
Low-Power, Current Feedback Operational Amplifier With Disable
OPA684Please 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.
SBOS219D – OCTOBER 2001 – REVISED JUNE 2009
Low-Power, Current Feedback
OPERATIONAL AMPLIFIER With Disable
FEA TURES MINIMAL BANDWIDTH CHANGE VERSUS GAIN > 120MHz BANDWIDTH TO GAIN > +10 LOW DISTORTION: < –78dBc at 5MHz HIGH OUTPUT CURRENT: 120mA SINGLE +5V TO +12V SUPPLY OPERATION DUAL ±2.5 TO ±6.0V SUPPLY OPERATION LOW SUPPLY CURRENT: 1.7mA LOW SHUTDOWN CURRENT: 100μA
DESCRIPTIONThe OPA684 provides a new level of performance in low-power,
wideband, current-feedback (CFB) amplifiers. This CFBplus ampli-
fier is 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 solutions limited by inverting input
linearity. Beyond simple high-gain applications, the OPA684 CFBplus
amplifier permits the gain setting element to be set with consider-
able freedom from amplifier bandwidth interaction. This allows
frequency response peaking elements to be added, multiple input
inverting summing circuits to have greater bandwidth, and low-
APPLICATIONS LOW-POWER BROADCAST VIDEO DRIVERS EQUALIZING FILTERS SAW FILTER HIGH GAIN POST AMPLIFIERS MULTICHANNEL SUMMING AMPLIFIERS PROFESSIONAL CAMERAS ADC INPUT DRIVERSpower line drivers to meet the demanding requirements of studio
cameras and broadcast video.
The output capability of the OPA684 also sets a new mark in
performance for low-power current feedback amplifiers. Delivering
a full ±4VPP swing on ±5V supplies, the OPA684 also has the
output current to support this swing into a 100Ω load. This minimal
output headroom requirement is complemented by a similar 1.2V
input stage headroom giving exceptional capability for single +5V
operation.
The OPA684’s low 1.7mA 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 OPA684 supply
current drops to less than 100μA while the I/O pins go to a high
impedance state.
Patent Pending
