LM1815

Features: ·Adaptive hysteresis·Single supply operation· Ground referenced input·True zero crossing timing reference·Operates from 2V to 12V supply voltage·Handles inputs from 100 mV to over 120V with external resistor·CMOS compatible logicApplication·Position sensing with notched wheels·Zero cross...

product image

LM1815 Picture
SeekIC No. : 004394691 Detail

LM1815: Features: ·Adaptive hysteresis·Single supply operation· Ground referenced input·True zero crossing timing reference·Operates from 2V to 12V supply voltage·Handles inputs from 100 mV to over 120V wit...

floor Price/Ceiling Price

Part Number:
LM1815
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

SeekIC Buyer Protection PLUS - newly updated for 2013!

  • Escrow Protection.
  • Guaranteed refunds.
  • Secure payments.
  • Learn more >>

Month Sales

268 Transactions

Rating

evaluate  (4.8 stars)

Upload time: 2024/2/22

Payment Methods

All payment methods are secure and covered by SeekIC Buyer Protection PLUS.

Notice: When you place an order, your payment is made to SeekIC and not to your seller. SeekIC only pays the seller after confirming you have received your order. We will also never share your payment details with your seller.
Product Details

Description



Features:

·Adaptive hysteresis
·Single supply operation
· Ground referenced input
·True zero crossing timing reference
·Operates from 2V to 12V supply voltage
·Handles inputs from 100 mV to over 120V with external resistor
·CMOS compatible logic





Application

·Position sensing with notched wheels
·Zero crossing switch
· Motor speed control
· Tachometer
·Engine testing





Pinout

  Connection Diagram




Specifications

Temperature Min -40 deg C
Temperature Max 125 deg C
Function VRS
View Using Catalog


If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Supply Voltage ......................................................12V
Power Dissipation (Note 1) ..........................1250 mW
Operating Temperature Range............-40 to +125
Storage Temperature Range ..............-65 to +150
Junction Temperature (Note 2) ........................+125
Input Current .................................................±30 mA
Lead Temperature (Soldering, 10 sec.) ..............260






Description

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.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM1815M SLM 0 42786 0 0 3352500 2 951281028
LM1815MX SLM 0 42786 0 0 3352500 2 951281028
LM1815N SLM 0 42786 0 0 3352500 2 951281028

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.




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 100 mVp-p.






Customers Who Bought This Item Also Bought

Margin,quality,low-cost products with low minimum orders. Secure your online payments with SeekIC Buyer Protection.
Potentiometers, Variable Resistors
Power Supplies - Board Mount
Static Control, ESD, Clean Room Products
Prototyping Products
DE1
Cables, Wires
Programmers, Development Systems
View more