Signal Conditioning Operational Amplifiers (Op Amps) Difference Amplifiers

LT1995 - 30MHz, 1000V/µs Gain Selectable Amplifier

Features

  • Internal Gain Setting Resistors
  • Pin Configurable as a Difference Amplifier, Inverting and Noninverting Amplifier
  • Difference Amplifier:
    Gain Range 1 to 7
    CMRR > 65dB
  • Noninverting Amplifier:
    Gain Range 1 to 8
  • Inverting Amplifier:
    Gain Range –1 to –7
  • Gain Error: <0.2%
  • Slew Rate: 1000V/µs
  • Bandwidth: 32MHz (Gain = 1)
  • Op Amp Input Offset Voltage: 2.5mV Max
  • Quiescent Current: 9mA Max
  • Wide Supply Range: ±2.5V to ±15V
  • Available in the 10-Lead MSOP Package and 10-Lead (3mm x 3mm) DFN Package

Typical Application

LT1995 Typical Application
LT1995 Typical Application

Description

The LT1995 is a high speed, high slew rate, gain selectable amplifier with excellent DC performance. Gains from -7 to 8 with a gain accuracy of 0.2% can be achieved using no external components. The device is particularly well suited for use as a difference amplifier, where the excellent resistor matching results in a typical common mode rejection ratio of 79dB or more.

The amplifier is a single gain stage design similar to the LT1363 and features superb slewing and settling characteristics. Input offset of the internal operational amplifier is less than 2.5mV and the slew rate is 1000V/µs. The output can drive a 150 Ohm  load to ±2.5V on ±5V supplies, making it useful in cable driver applications.

The resistors have excellent matching, 0.2% maximum at room temperature and 0.3% from -40°C to 85°C. The temperature coefficient of the resistors is typically -30ppm/°C. The resistors are extremely linear with voltage, resulting in a gain nonlinearity of 10ppm.

The LT1995 is fully specified at ±2.5V, ±5V and ±15V supplies and from -40°C to 85°C. The device is available in space saving 10-lead MSOP and 10-Lead (3mm × 3mm) DFN packages. For a micropower precision amplifier with precision resistors, see the LT1991 and LT1996.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LT1995CDD#PBF 3x3 DFN-10 DD C 05-08-1699 Yes
LT1995CDD#TRPBF 3x3 DFN-10 DD C 05-08-1699 Yes
LT1995CMS#PBF MS-10 MS C 05-08-1661 Yes
LT1995CMS#TRPBF MS-10 MS C 05-08-1661 Yes
LT1995IDD#PBF 3x3 DFN-10 DD I 05-08-1699 Yes
LT1995IDD#TRPBF 3x3 DFN-10 DD I 05-08-1699 Yes
LT1995IMS#PBF MS-10 MS I 05-08-1661 Yes
LT1995IMS#TRPBF MS-10 MS I 05-08-1661 Yes


LT1995 Package Drawing
LT1995 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LT1995CDD#PBF 3x3 DFN-10 C $2.51 $2.09 Yes
LT1995CDD#TRPBF 3x3 DFN-10 C $2.15 Yes
LT1995CMS#PBF MS-10 C $2.27 $1.89 Yes
LT1995CMS#TRPBF MS-10 C $1.95 Yes
LT1995IDD#PBF 3x3 DFN-10 I $2.99 $2.47 Yes
LT1995IDD#TRPBF 3x3 DFN-10 I $2.53 Yes
LT1995IMS#PBF MS-10 I $2.75 $2.27 Yes
LT1995IMS#TRPBF MS-10 I $2.33 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC819A LT1990CS8/LT1991CMS/LT1995CMS | Configurable Gain Amplifiers, V+ = +2.5V to +15V, V- = -2.5V to -15V $75.00
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Click here to view our complete list of demo boards

Applications

  • Instrumentation Amplifier
  • Current Sense Amplifier
  • Video Difference Amplifier
  • Automatic Test Equipment

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LT1995

The 'Configurator' is a design tool that generates the complete schematic for an amplifier stage designed with one of Linear Technology's Gain Selectable Amplifiers, the LT1991, LT1995 or LT1996. Simply enter the type of input signal (single ended or differential), the available supply voltage and the gain. The 'Configurator' generates a schematic of the best pin configuration and indicates key performance characteristics.

Technical Support