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LMH6503
www.ti.com
SNOSA78E – OCTOBER 2003 – REVISED APRIL 2013
LMH6503 Wideband, Low Power, Linear Variable Gain Amplifier
Check for Samples: LMH6503
1
FEATURES
DESCRIPTION
The
LMH™6503
is
a
wideband,
DC
coupled,
23
VS = ±5V, TA = 25°C, RF = 1kΩ, RG = 174Ω, RL =
differential
input,
voltage
controlled
gain
stage
100
Ω, AV = AV(MAX) = 10, Typical Values Unless
followed by a high-speed current feedback Op Amp
Specified.
which can directly drive a low impedance load. Gain
-3dB BW 135MHz
adjustment range is more than 70dB for up to 10MHz.
Gain Control BW 100MHz
Maximum gain is set by external components and the
Adjustment Range (Typical Over Temp) 70dB
gain can be reduced all the way to cut-off. Power
consumption is 370mW with a speed of 135MHz .
Gain Matching (Limit) ±0.7dB
Output referred DC offset voltage is less than 350mV
Slew Rate 1800V/µs
over the entire gain control voltage range. Device-to-
Supply Current (No Load) 37mA
device Gain matching is within 0.7dB at maximum
gain. Furthermore, gain at any VG is tested and the
Linear Output Current ±75mA
tolerance is ensured. The output current feedback Op
Output Voltage (RL = 100Ω) ±3.2V
Amp allows high frequency large signals (Slew Rate
Input Voltage Noise 6.6nV/
√Hz
= 1800V/
μs) and can also drive heavy load current
Input Current Noise 2.4pA/
√Hz
(75mA). Differential inputs allow common mode
rejection in low level amplification or in applications
THD (20MHz, RL = 100Ω, VO = 2VPP) −57dBc
where signals are carried over relatively long wires.
Replacement for CLC522
For single ended operation, the unused input can
easily be tied to ground (or to a virtual half-supply in
APPLICATIONS
single supply application). Inverting or non-inverting
gains could be obtained by choosing one input
Variable Attenuator
polarity or the other.
AGC
To further increase versatility when used in a single
Voltage Controller Filter
supply application, gain control range is set to be
Multiplier
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.
1
Please 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.
2
LMH is a trademark of Texas Instruments.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2003–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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