LTC1541 - Micropower Op Amp, Comparator and Reference

Features

  • Quiescent Current: 5µA Typ
  • Outputs Swing Rail-to-Rail
  • Low Op Amp Offset Voltage: 700µV Max
  • Reference Output Drives 0.01µF Capacitor
  • Internal 1.2V ±0.4% Reference Output (LTC1541)
  • Low Input Bias Current: 1nA Max
  • Reference Output Can Source Up to 2mA
  • Internal ±2.25mV Comparator Hysteresis
  • Comparator and Op Amp Input Range Includes Ground
  • Op Amp Capable of Driving Up to 1000pF Load
  • Unity-Gain Stable and 12kHz Bandwidth
  • 2.5V to 12.6V Supply Voltage Range
  • Pin Compatible Upgrade for MAX951/MAX953
  • Available in 3mm x 3mm x 0.8mm DFN Package

Typical Application

LTC1541 Typical Application
LTC1541 Typical Application

Description

The LTC1541/LTC1542 combine a micropower amplifier, comparator and bandgap reference (LTC1541) in an 8-pin package. The part operates from a single 2.5V to 12.6V or dual ±1.25V to ±6.3V supply with a typical supply current of 5µA. Both the op amp and comparator feature a common mode input voltage range that extends from the negative supply to within 1.3V of the positive supply. The op amp output stage swings from rail-to-rail. The comparator's inverting input is internally connected to the reference output (LTC1541).

The reference output voltage is 1.2V ±1% over the extended temperature range. The output can drive a bypass capacitor of up to 0.01µF without any oscillations. It can also source up to 2mA and sink up to 20µA.

The op amp is internally compensated to be unity-gain stable with typical GBW at 12kHz and slew rate of 8V/ms. The comparator has ±2.25mV of internal hysteresis to ensure clean output switching, even with slow moving input signals.

The LTC1541/LTC1542 are available in MSOP and SO-8 packages. For space-limited applications, the LTC1541/LTC1542 are available in a 3mm x 3mm low profile(0.8mm) dual fine-pitch leadless package (DFN).

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
LTC1541CDD#PBF 3x3 DFN-8 DD C 05-08-1698 Yes
LTC1541CDD#TRPBF 3x3 DFN-8 DD C 05-08-1698 Yes
LTC1541CMS8#PBF MS-8 MS8 C 05-08-1660 Yes
LTC1541CMS8#TRPBF MS-8 MS8 C 05-08-1660 Yes
LTC1541CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1541CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1541IDD#PBF 3x3 DFN-8 DD I 05-08-1698 Yes
LTC1541IDD#TRPBF 3x3 DFN-8 DD I 05-08-1698 Yes
LTC1541IMS8#PBF MS-8 MS8 I 05-08-1660 Yes
LTC1541IMS8#TRPBF MS-8 MS8 I 05-08-1660 Yes
LTC1541IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1541IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes


LTC1541 Package Drawing
LTC1541 Package Drawing
LTC1541 Package Drawing
LTC1541 Package Drawing
LTC1541 Package Drawing
LTC1541 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
LTC1541CDD#PBF 3x3 DFN-8 C $2.31 $1.83 Yes
LTC1541CDD#TRPBF 3x3 DFN-8 C $1.88 Yes
LTC1541CMS8#PBF MS-8 C $2.15 $1.70 Yes
LTC1541CMS8#TRPBF MS-8 C $1.75 Yes
LTC1541CS8#PBF SO-8 C $2.05 $1.50 Yes
LTC1541CS8#TRPBF SO-8 C $1.55 Yes
LTC1541IDD#PBF 3x3 DFN-8 I $2.54 $1.99 Yes
LTC1541IDD#TRPBF 3x3 DFN-8 I $2.04 Yes
LTC1541IMS8#PBF MS-8 I $2.37 $1.85 Yes
LTC1541IMS8#TRPBF MS-8 I $1.90 Yes
LTC1541IS8#PBF SO-8 I $2.26 $1.65 Yes
LTC1541IS8#TRPBF SO-8 I $1.70 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
DC601A LTC1541CDD | Micro-power Combination Op Amp, Comparator and Voltage Reference in DFN Package $50.00
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Click here to view our complete list of demo boards

Applications

  • Battery- or Solar-Powered Systems
  • Automotive Keyless Entry
  • Low Frequency, Local Area Alarms/Detectors
  • Infrared Receivers for Remote Controls
  • Smoke Detectors and Safety Sensors
  • GSM Portable Phones

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Design Tools

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LTC1541

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