LMH6505

ACTIVE

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

Top

Product details

Parameters

PGA/VGA VGA Number of channels (#) 1 BW @ Acl (MHz) 150 Vs (Max) (V) 12 Vs (Min) (V) 7 Acl, min spec gain (V/V) 1 Gain (Max) (dB) 40 Slew rate (Typ) (V/us) 1500 Operating temperature range (C) -40 to 85 open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)

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

All trademarks are the property of their respective owners.

open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)

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.

open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)
Download

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 2
Type Title Date
* Datasheet LMH6505 Wideband, Low Power, Linear-in-dB, Variable Gain Amplifier datasheet (Rev. E) Apr. 04, 2013
E-book The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
10
Description

Texas Instruments offers this unpopulated Evaluation Board to aid in the evaluation and testing of high-speed Variable Gain Amplifier that are offered in the 8-Pin SOIC package. Resistors, capacitors, or any other surface-mount components can be easily mounted on this board in the desired circuit (...)

Features
  • Accommodates various high-speed Variable Gain Amplifier
  • Allows quick and easy evaluation
  • Serves as reference design to aid in high-speed PCB layout
  • Utilizes surface-mount components

 

Design tools & simulation

SIMULATION MODEL Download
SNOM152.ZIP (4 KB) - PSpice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
VSSOP (DGK) 8 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos

Related videos