1FEATURES
23• VS = ±5V, TA = 25°C, RF = 1kΩ, RG = 174Ω, RL =
100Ω, A V = AV(MAX) = 10 Typical Values Unless
Specified.
• -3dB BW: 130MHz
• Gain Control BW: 100MHz
• Adjustment Range (Typical Over Temp): 70dB
• Gain Matching (Limit): ±0.6dB
• Slew Rate: 1800V/μs
• Supply Current (No Load): 27mA
• Linear Output Current: ±75mA
• Output Voltage (R L = 100Ω): ±3.2V
• Input Voltage Noise: 7.7nV/√Hz
• Input Current Noise: 2.4pA/√Hz
• THD (20MHz, R L = 100Ω, VO = 2VPP): −53dBc
• Replacement for CLC520

APPLICATIONS
• Variable Attenuator
• AGC
• Voltage Controller Filter
• Video Imaging Processing

DESCRIPTION
The LMH™6502 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 300mW with a speed of 130MHz.
Output referred DC offset voltage is less than 350mV
over the entire gain control voltage range. Device-to-
device Gain matching is within ±0.6dB at maximum
gain. Furthermore, gain at any VG is tested and the
tolerance is ensured. 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 provide ease of use when working with a single
supply, VG range is set to be from 0V to +2V relative
to pin 11 potential (ground pin). In single supply
operation, this ground pin is tied to a "virtual" half
supply.
LMH6502 gain control is linear in dB for a large
portion of the total gain control range. This makes the
device suitable for AGC circuits among other
applications. For linear gain control applications, see
the LMH6503 datasheet. The LMH6502 is available in
the SOIC and TSSOP package.