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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 528kB) Download   E-Mail

Description

The MAX9924–MAX9927 variable reluctance (VR or magnetic coil) sensor interface devices are ideal for position and speed sensing for automotive crankshafts, camshafts, transmission shafts, etc. These devices integrate a precision amplifier and comparator with selectable adaptive peak threshold and zero-crossing circuit blocks that generate robust output pulses even in the presence of substantial system noise or extremely weak VR signals. The MAX9926/MAX9927 are dual versions of the MAX9924/MAX9925, respectively. The MAX9924/MAX9926 combine matched resistors with a CMOS input precision operational amplifier to give high CMRR over a wide range of input frequencies and temperatures. The MAX9924/MAX9926 differential amplifiers provide a fixed gain of 1V/V. The MAX9925/MAX9927 make all three terminals of the internal operational amplifier available, allowing greater flexibility for gain. The MAX9926 also provides a direction output that is useful for quadrature-connected VR sensors that are used in certain high-performance engines. These devices interface with both new-generation differential VR sensors as well as legacy single-ended VR sensors. The MAX9924/MAX9925 are available in the 10-pin µMAX® package, while the MAX9926/MAX9927 are available in the 16-pin QSOP package. All devices are specified over the -40°C to +125°C automotive temperature range.

An evaluation kit is available:  MAX9924UEVKIT   MAX9926UEVKIT  

Key Features		Applications/Uses
Differential Input Stage Provides Enhanced Noise Immunity Precision Amplifier and Comparator Allows Small-Signal Detection User-Enabled Internal Adaptive Peak Threshold or Flexible External Threshold Zero-Crossing Detection Provides Accurate Phase Information		Camshaft VRS Interfaces Crankshaft VRS Interfaces Vehicle Speed VRS Interfaces

Diagram

Simplified Block Diagram

Evaluation Kits

MAX9924UEVKIT MAX9926UEVKIT

Design Guides

Amplifiers and Sensors (PDF)

Reliability Reports

Reliability Report: MAX9927.pdf MAX9926.pdf Show FIT data for: MAX9924 MAX9925 MAX9926 MAX9927 Request Reliability Report for: MAX9925 MAX9924

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-8 of 8

MAX9924	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9924UAUB+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9924UAUB+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9925	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9925AUB+T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX9925AUB+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9926	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9926UAEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9926UAEE+T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX9927	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9927AEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9927AEE+T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet

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