LMH6505 Amplifier Datasheet

LMH6505 Datasheet PDF, Equivalent


Part Number

LMH6505

Description

Variable Gain Amplifier

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download LMH6505 Datasheet


LMH6505
LMH6505
www.ti.com
SNOSAT4E – DECEMBER 2005 – REVISED APRIL 2013
LMH6505 Wideband, Low Power, Linear-in-dB, Variable Gain Amplifier
Check for Samples: LMH6505
FEATURES
1
2 VS = ±5V, TA = 25°C, RF = 1 k, RG = 100, RL =
100, 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 = 100, VO = 2 VPP) 45 dBc
APPLICATIONS
• Variable Attenuator
• AGC
• Voltage Controlled Filter
• Video Imaging Processing
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 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 VSSOP package. The combination of
minimal external components and small outline
packages allows the LMH6505 to be used in space-
constrained applications.
30
10
-10
-30 dB
125°C
-50
25°C
-55°C
-70
-90
-0.5
0
0.5 1
VG (V)
12
11
125°C
25°C
-55°C
V/V
10
9
8
7
6
5
4
3
2
1
0
1.5 2
Figure 1. Gain vs. VG
Typical Application
VIN
RG
100:
VG
V+
1
2
8
3
7
4
5
V-
6
RF
1 k:
RL
100:
1 Figure 2. AVMAX = 9.4 V/V
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2013, Texas Instruments Incorporated

LMH6505
LMH6505
SNOSAT4E – DECEMBER 2005 – REVISED APRIL 2013
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)(2)
ESD Tolerance (3)
Human Body Model
Machine Model
Input Current
Output Current (4)
Supply Voltages (V+ - V)
Voltage at Input/ Output pins
Storage Temperature Range
Junction Temperature
Soldering Information:
Infrared or Convection (20 sec)
Wave Soldering (10 sec)
2000V
200V
±10 mA
120 mA
12.6V
V+ +0.8V, V0.8V
65°C to 150°C
150°C
235°C
260°C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not ensured. For ensured specifications, see the Electrical
Characteristics.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(3) Human Body Model, applicable std. MIL-STD-883, Method 3015.7. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of
JEDEC). Field-Induced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC).
(4) The maximum output current (IOUT) is determined by device power dissipation limitations or value specified, whichever is lower.
Operating Ratings(1)
Supply Voltages (V+ - V)
Temperature Range (2)
Thermal Resistance:
8 -Pin SOIC
8-Pin VSSOP
(θJC)
60
65
(θJA)
165
235
7V to 12V
40°C to +85°C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not ensured. For ensured specifications, see the Electrical
Characteristics.
(2) The maximum power dissipation is a function of TJ(MAX), θJA. The maximum allowable power dissipation at any ambient temperature is
PD = (TJ(MAX) – TA)/ θJA. All numbers apply for packages soldered directly onto a PC Board.
2 Submit Documentation Feedback
Product Folder Links: LMH6505
Copyright © 2005–2013, Texas Instruments Incorporated


Features LMH6505 www.ti.com SNOSAT4E – DECEMB ER 2005 – REVISED APRIL 2013 LMH6505 Wideband, Low Power, Linear-in-dB, Vari able Gain Amplifier Check for Samples: LMH6505 FEATURES 1 •2 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 • Sup ply Voltage Range 7V to 12V • Slew Ra te (Inverting) 1500 V/μs • Supply Cu rrent (No Load) 11 mA • Linear Output Current ±60 mA • Output Voltage Swi ng ±2.4V • Input Noise Voltage 4.4 n V/√Hz • Input Noise Current 2.6 pA/ √Hz • THD (20 MHz, RL = 100Ω, VO = 2 VPP) −45 dBc APPLICATIONS • Var iable Attenuator • AGC • Voltage Co ntrolled Filter • Video Imaging Proce ssing DESCRIPTION The LMH6505 is a wide band 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.
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