LMH6639
190MHz Rail-to-Rail Output Amplifier with Disable
LMH6639 190MHz Rail-to-Rail Output Amplifier with Disable
July 2003
General Description
The LMH6639 is a voltage feedback operational amplifier
with a rail-to-rail output drive capability of 110mA. Employing
National’s patented VIP10 process, the LMH6639 delivers a
bandwidth of 190MHz at a current consumption of only
3.6mA. An input common mode voltage range extending to
0.2V below the V
LMH6639 a true single supply op-amp. The output voltage
range extends to within 30mV of either supply rail providing
the user with a dynamic range that is especially desirable in
low voltage applications.
The LMH6639 offers a slew rate of 172V/µs resulting in a full
power bandwidth of approximately 28MHz. The T
83nsec combined with a settling time of 33nsec makes this
device ideally suited for multiplexing applications. Careful
attention has been paid to ensure device stability under all
operating voltages and modes. The result is a very well
behaved frequency response characteristic for any gain setting including +1, and excellent specifications for driving
video cables including harmonic distortion of −60dBc, differential gain of 0.12% and differential phase of 0.045˚
−
and to within 1V of V+, makes the
value of
ON
Features
(VS= 5V, Typical values unless specified)
n Supply current (no load)3.6mA
n Supply current (off mode)400µA
n Output resistance (closed loop 1MHz)0.186Ω
n −3dB BW (A
n Settling time33nsec
n Input common mode voltage−0.2V to 4V
n Output voltage swing40mV from rails
n Linear output current110mA
n Total harmonic distortion−60dBc
n Fully characterized for 3V, 5V and
n No output phase reversal with CMVR exceeded
n Excellent overdrive recovery
n Off Isolation 1MHz−70dB
n Differential Gain0.12%
n Differential Phase0.045˚
= 1)190MHz
V
±
5V
Applications
n Active filters
n CD/DVD ROM
n ADC buffer amplifier
n Portable video
n Current sense buffer
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 2: Human body model, 1.5kΩ in series with 100pF.
Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the
maximum allowed junction temperature of 150˚C.
Note 4: The maximum power dissipation is a function of T
P
D
Note 5: Typical values represent the most likely parametric norm.
Note 6: All limits are guaranteed by testing or statistical analysis.
Note 7: Positive current corresponds to current flowing into the device.
Note 8: Slew rate is the average of the rising and falling slew rates.
Note 9: Machine Model, 0Ω in series with 200pF.
Note 10: Short circuit test is a momentary test.
Note 11: Offset voltage average drift determined by dividing the change in V
Note 12: f ≤ 1kHz (see typical performance Characteristics)
On Time after Shutdown83nsec
Off Time to Shutdown160nsec
Output Resistance Closed
Loop
=(T
J(MAX)-TA
)/ θJA. All numbers apply for packages soldered directly onto a PC board.
RF= 10kΩ, f = 1kHz, AV=−132
R
= 10kΩ, f = 1MHz, AV= −1226
F
, θJA, and TA. The maximum allowable power dissipation at any ambient temperature is
J(MAX)
at temperature extremes into the total temperature change.