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.