Specification	LM1815N/NOPB

Current - Supply	6 mA
Input Type	Logic
Mounting Type	Through Hole
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 °C
Output Type	Logic
Package / Case	14-DIP
Package / Case [x]	0.3 "
Package / Case [y]	7.62 mm
Type	Sensor Interface

LM1815 Series

Part	Input Type	Package / Case [x]	Package / Case [y]	Package / Case	Current - Supply	Type	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Output Type
Texas Instruments LM1815MX	Logic	0.154 in	3.9 mm	14-SOIC	6 mA	Sensor Interface	125 °C	-40 °C	Surface Mount	Logic
Texas Instruments LM1815N	Logic	0.3 "	7.62 mm	14-DIP	6 mA	Sensor Interface	125 °C	-40 °C	Through Hole	Logic
Texas Instruments LM1815N/NOPB	Logic	0.3 "	7.62 mm	14-DIP	6 mA	Sensor Interface	125 °C	-40 °C	Through Hole	Logic
Texas Instruments LM1815MX/NOPB	Logic	0.154 in	3.9 mm	14-SOIC	6 mA	Sensor Interface	125 °C	-40 °C	Surface Mount	Logic
Texas Instruments LM1815M	Logic	0.154 in	3.9 mm	14-SOIC	6 mA	Sensor Interface	125 °C	-40 °C	Surface Mount	Logic
Texas Instruments LM1815M/NOPB	Logic	0.154 in	3.9 mm	14-SOIC	6 mA	Sensor Interface	125 °C	-40 °C	Surface Mount	Logic

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Texas Instruments	TUBE	1	$ 3.86
		100	$ 3.38
		250	$ 2.37
		1000	$ 1.91

Description

General part information

LM1815 Series

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.

Documents

Technical documentation and resources

LM1815 Adaptive Variable Reluctance Sensor Amplifier datasheet (Rev. F)

Data sheet