LM1815 Data Sheet, Product Information And Support

Home Sensors

• parametric-filter Amplifiers
• parametric-filter Audio, haptics & piezo
• parametric-filter Battery management ICs
• parametric-filter Clocks & timing
• parametric-filter DLP products
• parametric-filter Data converters
• parametric-filter Die & wafer services
• parametric-filter Interface
• parametric-filter Isolation
• parametric-filter Logic & voltage translation
• parametric-filter Microcontrollers (MCUs) & processors
• parametric-filter Motor drivers
• parametric-filter Passive and discrete
• parametric-filter Power management
• parametric-filter RF & microwave
• parametric-filter Sensors
• parametric-filter Switches & multiplexers
• parametric-filter Wireless connectivity

Specialty sensors

• parametric-filter Humidity sensors
• parametric-filter Magnetic sensors
• parametric-filter Optical sensors
• parametric-filter Specialty sensors
• parametric-filter Temperature sensors
• parametric-filter mmWave radar sensors

Signal conditioners

• parametric-filter Inductive sensor AFEs
• parametric-filter Signal conditioners
• parametric-filter Ultrasonic sensor AFEs

Home Sensors Specialty sensors Signal conditioners LM1815 ACTIVE

Adaptive Variable Reluctance Sensor Amplifier

Order now Data sheet

• document-pdfAcrobat LM1815 Adaptive Variable Reluctance Sensor Amplifier datasheet (Rev. F)

LM1815

ACTIVE Data sheet Order now

Product details

Number of input channels 1 Features Variable Reluctance Sensor Operating temperature range (°C) -40 to 125 Vs (min) (V) 2 Vs (max) (V) 12 Rating Catalog Number of input channels 1 Features Variable Reluctance Sensor Operating temperature range (°C) -40 to 125 Vs (min) (V) 2 Vs (max) (V) 12 Rating Catalog PDIP (NFF) 14 158.4268 mm² 19.18 x 8.26 SOIC (D) 14 51.9 mm² 8.65 x 6

• Adaptive Hysteresis
• Single Supply Operation
• Ground Referenced Input
• True Zero Crossing Timing Reference
• Operates from 2V to 12V Supply Voltage
• Handles Inputs from 100 mVP-P to over 120VP-P with External Resistor
• CMOS Compatible Logic

All trademarks are the property of their respective owners.

• Adaptive Hysteresis
• Single Supply Operation
• Ground Referenced Input
• True Zero Crossing Timing Reference
• Operates from 2V to 12V Supply Voltage
• Handles Inputs from 100 mVP-P to over 120VP-P with External Resistor
• CMOS Compatible Logic

All trademarks are the property of their respective owners.

The LM1815 is an adaptive sense amplifier and default gating circuit for motor control applications. The sense amplifier provides a one-shot pulse output whose leading edge coincides with the negative-going zero crossing of a ground referenced input signal such as from a variable reluctance magnetic pick-up coil.

In normal operation, this timing reference signal is processed (delayed) externally and returned to the LM1815. A Logic input is then able to select either the timing reference or the processed signal for transmission to the output driver stage.

The adaptive sense amplifier operates with a positive-going threshold which is derived by peak detecting the incoming signal and dividing this down. Thus the input hysteresis varies with input signal amplitude. This enables the circuit to sense in situations where the high speed noise is greater than the low speed signal amplitude. Minimum input signal is 150mVP-P.

The LM1815 is an adaptive sense amplifier and default gating circuit for motor control applications. The sense amplifier provides a one-shot pulse output whose leading edge coincides with the negative-going zero crossing of a ground referenced input signal such as from a variable reluctance magnetic pick-up coil.

In normal operation, this timing reference signal is processed (delayed) externally and returned to the LM1815. A Logic input is then able to select either the timing reference or the processed signal for transmission to the output driver stage.

The adaptive sense amplifier operates with a positive-going threshold which is derived by peak detecting the incoming signal and dividing this down. Thus the input hysteresis varies with input signal amplitude. This enables the circuit to sense in situations where the high speed noise is greater than the low speed signal amplitude. Minimum input signal is 150mVP-P.

filter Find other Signal conditioners Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI No results found. Please clear your search and try again. View all 1

Type	Title	Date
*	Data sheet	LM1815 Adaptive Variable Reluctance Sensor Amplifier datasheet (Rev. F)	27 Mar 2013

Design & development

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

Package	Pins	CAD symbols, footprints & 3D models
PDIP (NFF)	14	Ultra Librarian
SOIC (D)	14	Ultra Librarian

TI's Standard Terms and Conditions for Evaluation Items apply.

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

Information included:

• Fab location
• Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

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. ​​​​​​​​​​​​​​

Video series

View all videos

Videos