LM2917M - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

LM2917M
Manufacturer

TI
ChipWorker Part#

CW86397437
Category

Active Chip
Package

SOIC-14
Description

Frequency to Voltage Converter 14-SOIC -40℃ to 85℃
Documentation

Datasheet

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LM2917M Specifications

Attribute	Attribute Value

Part Number	LM2917M
Manufacturer	TI
ChipWorker Part#	CW86397437
Category	Active Chip
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	14 Pin
Case/Package	SOIC-14
Frequency	5.00 kHz
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-40 ℃
	expand all
Size-Height	1.5 mm
Product Lifecycle Status	Active
Packaging	Tube
RoHS	Non-Compliant
Lead-Free Status	Contains Lead

Product Description

General Description
The LM2907, LM2917 series are monolithic frequency to voltage converters with a high gain op amp/comparator designed to operate a relay, lamp, or other load when the input frequency reaches or exceeds a selected rate. The tachometer uses a charge pump technique and offers frequency doubling for low ripple, full input protection in two versions (LM2907-8, LM2917-8) and its output swings to ground for a zero frequency input.
The op amp/comparator is fully compatible with the tachometer and has a floating transistor as its output. This feature allows either a ground or supply referred load of up to 50 mA. The collector may be taken above VCC up to a maximum VCE of 28V.
Advantages
Output swings to ground for zero frequency input
Easy to use; VOUT = fIN x VCC x R1 x C1
Only one RC network provides frequency doubling
Zener regulator on chip allows accurate and stable frequency to voltage or current conversion (LM2917)
Features
Ground referenced tachometer input interfaces directly with variable reluctance magnetic pickups
Op amp/comparator has floating transistor output
50 mA sink or source to operate relays, solenoids, meters, or LEDs
Frequency doubling for low ripple
Tachometer has built-in hysteresis with either differential input or ground referenced input
Built-in zener on LM2917
±0.3% linearity typical
Ground referenced tachometer is fully protected from damage due to swings above VCC and below ground
Applications
Over/under speed sensing
Frequency to voltage conversion (tachometer)
Speedometers
Breaker point dwell meters
Hand-held tachometer
Speed governors
Cruise control
Automotive door lock control
Clutch control
Horn control
Touch or sound switches

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