LMH6505 Series

Wideband, Low Power, Linear-in-dB, Variable Gain Amplifier

Catalog

Wideband, Low Power, Linear-in-dB, Variable Gain Amplifier

Part	Mounting Type	Voltage - Supply Span (Min) [Min]	Number of Circuits	Current - Input Bias	Slew Rate	Package / Case	Package / Case [custom]	Package / Case	Current - Output / Channel	Voltage - Supply Span (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	-3db Bandwidth	Current - Supply	Package / Case [y]	Package / Case [x]	Supplier Device Package
Texas Instruments LMH6505MMX	Surface Mount	7 V	1	600 nA	1500 V/µs	8-MSOP 8-TSSOP	0.118 in	3 mm	80 mA	12 V	85 °C	-40 °C	150 MHz	11 mA
Texas Instruments LMH6505MA/NOPB	Surface Mount	7 V	1	600 nA	1500 V/µs	8-SOIC			80 mA	12 V	85 °C	-40 °C	150 MHz	11 mA	3.9 mm	0.154 in	8-SOIC
Texas Instruments LMH6505MAX/NOPB	Surface Mount	7 V	1	600 nA	1500 V/µs	8-SOIC			80 mA	12 V	85 °C	-40 °C	150 MHz	11 mA	3.9 mm	0.154 in	8-SOIC
Texas Instruments LMH6505MM/NOPB	Surface Mount	7 V	1	600 nA	1500 V/µs	8-MSOP 8-TSSOP	0.118 in	3 mm	80 mA	12 V	85 °C	-40 °C	150 MHz	11 mA

Catalog

Wideband, Low Power, Linear-in-dB, Variable Gain Amplifier

Key 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 MHzGain Control BW 100 MHzAdjustment Range (<10 MHz) 80 dBGain Matching (Limit) ±0.50 dBSupply Voltage Range 7V to 12VSlew Rate (Inverting) 1500 V/μsSupply Current (No Load) 11 mALinear Output Current ±60 mAOutput Voltage Swing ±2.4VInput Noise Voltage 4.4 nV/√HzInput Noise Current 2.6 pA/√HzTHD (20 MHz, RL= 100Ω, VO= 2 VPP) −45 dBcAll trademarks are the property of their respective owners.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 MHzGain Control BW 100 MHzAdjustment Range (<10 MHz) 80 dBGain Matching (Limit) ±0.50 dBSupply Voltage Range 7V to 12VSlew Rate (Inverting) 1500 V/μsSupply Current (No Load) 11 mALinear Output Current ±60 mAOutput Voltage Swing ±2.4VInput Noise Voltage 4.4 nV/√HzInput Noise Current 2.6 pA/√HzTHD (20 MHz, RL= 100Ω, VO= 2 VPP) −45 dBcAll trademarks are the property of their respective owners.

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 ensured 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) ensured. 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 VGrange is set to be from 0V to +2V relative to the ground pin potential (pin 4). VGinput 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 VSSOP package. The combination of minimal external components and small outline packages allows the LMH6505 to be used in space-constrained applications. 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 ensured 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) ensured. 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 VGrange is set to be from 0V to +2V relative to the ground pin potential (pin 4). VGinput 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 VSSOP package. The combination of minimal external components and small outline packages allows the LMH6505 to be used in space-constrained applications.