LMH6505 - Wideband, Low Power, Linear-in-dB, Variable Gain Amplifier from the PowerWise® Family
Datasheet Packaging Samples & Pricing Reliability Reference Designs Models Knowledge Base

Features

VS = ±5V, TA = 25°C, RF = 1 kΩ, RG = 100Ω, RL = 100Ω, AV = AVMAX = 9.4 V/V , Typical values unless specified.

−3 dB BW

150 MHz

Gain control BW

100 MHz

Adjustment range (<10 MHz)

80 dB

Gain matching (limit)

±0.50 dB

Supply voltage range

7V to 12V

Slew rate (inverting)

1500 V/μs

Supply current (no load)

11 mA

Linear output current

±60 mA

Output voltage swing

±2.4V

Input noise voltage

4.4 nV/ √Hz

Input noise current

2.6 pA/ √Hz

THD (20 MHz, RL = 100Ω, VO = 2 VPP)

−45 dBc

General Description

The LMH6505 is a wideband DC coupled voltage controlled gain stage followed by a high speed current feedback operational amplifier which can directly drive a low impedance load. More...


Applications

•Variable attenuator
•AGC
•Voltage controlled filter
•Video imaging processing
  Typical Application
click for larger image


ParametersValues
Gain Adjust Range 80 dB
Analog Control BW 150 MHz
Signal Channel BW 150 MHz
Supply Min 7 Volt
Supply Max 12 Volt
Gain Control Interface Voltage
Slew Rate 1500 Volts/usec
Supply Current 11 mA
PowerWise Rating 2 73 uA/MHz
Output Current 80 mA
Offset Voltage max, 25C 55 mV
Max Input Bias Current 3700 nA
Voltage Noise 4.4 nV/root(Hz)
HD 2nd -47 dB
HD 3rd -55 dB
Diff Gain 0.45 dB
Diff Phase 0.13 %
Special Features Undefined
Function VGA
Temperature Min -40 deg C
Temperature Max 85 deg C
PowerWise Yes


Typical Performance

click for larger image


  Connection Diagram
click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LMH6505 Wideband, Low Power, Linear-in-dB, Variable Gain Amplifier 717
Kbytes		 14-Dec-07 Download
LMH6505 Wideband, Low Power, Linear-in-dB, Variable Gain Amplifier (Japanese)
 846 Kbytes   Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LMH6505MASOIC NARROW8NOPB1260RoHS Download Full productionLMH6505.MOD
Samples with Eval Board
Buy Now 		1K+$2.52rail
of
95		NSZXTT
LMH65
05MA
6 weeks500
LMH6505MAXSOIC NARROW8NOPB1260RoHS Download Full productionLMH6505.MOD
 
Buy Now 		1K+$2.52reel
of
2500		NSZXTT
LMH65
05MA
8 weeks3000
LMH6505MMMINI SOIC8NOPB1260RoHS Download Full productionLMH6505.MOD
Samples
Buy Now 		1K+$2.52reel
of
1000		ZXTT
AZ2A
6 weeks2000
LMH6505MMXMINI SOIC8NOPB1260RoHS Download Full productionLMH6505.MOD
 
Buy Now 		1K+$2.52reel
of
3500		ZXTT
AZ2A
6 weeks5000

General Description

The LMH6505 is a wideband DC coupled voltage controlled gain stage followed by a high speed current feedback operational amplifier which can directly drive a low impedance load. The gain adjustment range is 80 dB for up to 10 MHz which is accomplished by varying the gain control input voltage, VG.

Maximum gain is set by external components, and the gain can be reduced all the way to cutoff. Power consumption is 110 mW with a speed of 150 MHz and a gain control bandwidth (BW) of 100 MHz. Output referred DC offset voltage is less than 55 mV over the entire gain control voltage range. Device-to-device gain matching is within ±0.5 dB at maximum gain. Furthermore, gain is tested and guaranteed over a wide range. The output current feedback op amp allows high frequency large signals (Slew Rate = 1500 V/μs) and can also drive a heavy load current (60 mA) guaranteed. Near ideal input characteristics (i.e. low input bias current, low offset, low pin 3 resistance) enable the device to be easily configured as an inverting amplifier as well.

To provide ease of use when working with a single supply, the VG range is set to be from 0V to +2V relative to the ground pin potential (pin 4). VG input impedance is high in order to ease drive requirement. In single supply operation, the ground pin is tied to a "virtual" half supply.

The LMH6505’s gain control is linear in dB for a large portion of the total gain control range from 0 dB down to −85 dB at 25°C, as shown below. This makes the device suitable for AGC applications. For linear gain control applications, see the LMH6503 datasheet.

The LMH6505 is available in either the 8-Pin SOIC or the 8-Pin MSOP package. The combination of minimal external components and small outline packages allows the LMH6505 to be used in space-constrained applications.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LMH6505MAVIP 100128010011550004327734403
LMH6505MAXVIP 100128010011550004327734403
LMH6505MMVIP 100128010011550004327734403
LMH6505MMXVIP 100128010011550004327734403

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.



Reference Designs
•RD-162 - Precision Amplitude Control for Analog Video

[Information as of 7-Nov-2009]