LMH6502MAX ,Wideband, Low Power, Linear-in-dB Variable Gain AmplifierFeatures™ = ±5V, T = 25˚C, R =1kΩ,R = 174Ω,R = 100Ω,AThe LMH 6502 is a wideband DC coupled differen ..
LMH6503MA ,Wideband, Low Power, Linear Variable Gain AmplifierApplicationstion, the unused input can easily be tied to ground (or to an Variable attenuatorvirtua ..
LMH6503MA ,Wideband, Low Power, Linear Variable Gain AmplifierFeatures™ ±The LMH 6503 is a wideband DC coupled differential input V = 5V, T = 25˚C, R =1kΩ,R = 17 ..
LMH6503MA ,Wideband, Low Power, Linear Variable Gain AmplifierApplicationstion, the unused input can easily be tied to ground (or to an Variable attenuatorvirtua ..
LMH6503MAX ,Wideband, Low Power, Linear Variable Gain Amplifierapplications where signals arecarried over relatively long wires. For single ended opera-
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LMH6502MA-LMH6502MAX
Wideband, Low Power, Linear-in-dB Variable Gain Amplifier
LMH6502
Wideband, Low Power, Linear-in-dB Variable Gain
Amplifier
General DescriptionThe LMH™6502isa widebandDC coupled differential input
voltage controlled gain stage followedbya high-speed cur-
rent feedbackOp Amp which can directly drivea low imped-
ance load. Gain adjustment rangeis more than 70dBforup 10MHz.
Maximum gainissetby external components and the gain
canbe reducedallthe wayto cut-off. Power consumptionis
300mW witha speedof 130MHz. Output referred DC offset
voltageis less than 350mV over the entire gain control
voltage range. Device-to-device Gain matchingis within
±0.6dBat maximum gain. Furthermore, gainat anyVGis
tested and the toleranceis guaranteed. The output current
feedbackOp Amp allows high frequency large signals (Slew
Rate= 1800V/µs) and can also drive heavy load current
(75mA). Differential inputs allow common mode rejectionin
low level amplificationorin applications where signals are
carried over relatively long wires. For single ended opera-
tion,the unused input can easilybe tiedto ground(ortoa
virtual half-supplyin single supply application). Invertingor
non-inverting gains couldbe obtainedby choosing one input
polarityor the other. provide easeof use when working witha single supply, rangeis settobe from 0Vto +2V relativeto pin11
potential (ground pin).In single supply operation, this ground
pinis tiedtoa "virtual" half supply.
LMH6502 gain controlis linearindBfora large portionofthe
total gain control range. This makes the device suitablefor
AGC circuits among other applications. For linear gain con-
trol applications, see the LMH6503 datasheet. The
LMH6502is availableinthe SOIC-14 and TSSOP-14 pack-
age.
Features= ±5V,TA= 25˚C,RF =1kΩ,RG= 174Ω,RL= 100Ω,AV
=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 (RL= 100Ω) ±3.2V Input voltage noise 7.7nV/ Input current noise 2.4pA/ THD (20MHz,RL= 100Ω,VO =2VPP) −53dBc Replacementfor CLC520
Applications Variable attenuator AGC Voltage controller filter Video imaging processing
Gain vs.VGfor Various TemperatureTypical Application
AVMAX= 10V/V
June 2004
LMH6502
ideband,
Low
Power
Linear-in-dB
ariable
Gain
Amplifier
