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LMH6503

National Semiconductor
Part Number LMH6503
Manufacturer National Semiconductor
Description Wideband / Low Power / Linear Variable Gain Amplifier
Published Apr 25, 2005
Detailed Description LMH6503 Wideband, Low Power, Linear Variable Gain Amplifier June 2004 LMH6503 Wideband, Low Power, Linear Variable Gai...
Datasheet PDF File LMH6503 PDF File

LMH6503
LMH6503

Overview
LMH6503 Wideband, Low Power, Linear Variable Gain Amplifier June 2004 LMH6503 Wideband, Low Power, Linear Variable Gain Amplifier General Description The LMH™6503 is a wideband DC coupled differential input voltage controlled gain stage followed by a high-speed current feedback Op Amp which can directly drive a low impedance load.
Gain adjustment range is more than 70dB for up to 10MHz.
Maximum gain is set by external components and the gain can be reduced all the way to cut-off.
Power consumption is 370mW with a speed of 135MHz .
Output referred DC offset voltage is less than 350mV over the entire gain control voltage range.
Device-to-device Gain matching is within 0.
7dB at maximum gain.
Furthermore, gain at any VG is tested and the tolerance is guaranteed.
The output current feedback Op Amp allows high frequency large signals (Slew Rate = 1800V/µs) and can also drive heavy load current (75mA).
Differential inputs allow common mode rejection in low level amplification or in applications where signals are carried over relatively long wires.
For single ended operation, the unused input can easily be tied to ground (or to a virtual half-supply in single supply application).
Inverting or non-inverting gains could be obtained by choosing one input polarity or the other.
To further increase versatility when used in a single supply application, gain control range is set to be from −1V to +1V relative to pin 11 potential (ground pin).
In single supply operation, this ground pin is tied to a "virtual" half supply.
Gain control pin has high input impedance to simplify its drive requirement.
Gain control is linear in V/V throughout the gain adjustment range.
Maximum gain can be set to be anywhere between 1V/V to 100V/V or higher.
For linear in dB gain control applications, see LMH6502 datasheet.
The LMH6503 is available in the SOIC-14 and TSSOP-14 package.
Features VS = ± 5V, TA = 25˚C, RF = 1kΩ, RG = 174Ω, RL = 100Ω, AV = AV(MAX) = 10, Typical values unless specified.
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