MAX9927 Maxim Integrated Products, MAX9927 Datasheet

MAX9927

Manufacturer Part Number

MAX9927

Description

(MAX9924 - MAX9927) Variable Reluctance Sensor Interfaces

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX9927.pdf (22 pages)

Available stocks

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Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MAX9927AEE+

Manufacturer:

Maxim

Quantity:

667

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The MAX9924–MAX9927 variable reluctance (VR or mag-

netic coil) sensor interface devices are ideal for position

and speed sensing for automotive crankshafts,

camshafts, transmission shafts, etc. These devices inte-

grate 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 ter-

minals 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-per-

formance 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

available in the 16-pin QSOP package. All devices are

specified over the -40°C to +125°C automotive temper-

ature range.

19-4283; Rev 0; 10/08

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Differential Input and Adaptive Peak Threshold

Camshaft VRS Interfaces

Crankshaft VRS Interfaces

Vehicle Speed VRS Interfaces

package, while the MAX9926/MAX9927 are

Variable Reluctance Sensor Interfaces with

________________________________________________________________ Maxim Integrated Products

ENGINE BLOCK

VR SENSOR

General Description

Applications

DIFFERENTIAL

AMPLIFIER

♦ Differential Input Stage Provides Enhanced Noise

♦ Precision Amplifier and Comparator Allows

♦ User-Enabled Internal Adaptive Peak Threshold or

♦ Zero-Crossing Detection Provides Accurate

+ Denotes a lead-free/RoHS-compliant package.

* Future product—contact factory for availability.

µMAX is a registered trademark of Maxim Integrated Products, Inc.

MAX9924UAUB

MAX9925AUB

MAX9926UAEE

MAX9927AEE

MAX9924UAUB+

MAX9925AUB+

MAX9926UAEE+*

MAX9927AEE+*

ADAPTIVE/MINIMUM

Immunity

Small-Signal Detection

Flexible External Threshold

Phase Information

ZERO-CROSSING

THRESHOLDS

PART

AND

PART

INTERNAL/EXTERNAL

BIAS VOLTAGE

Simplified Block Diagram

MAX9924

Ordering Information

1 x Operational

2 x Operational

-40°C to +125°C

1 x Differential

2 x Differential

TEMP RANGE

AMPLIFIER

Selector Guide

PIN-PACKAGE

Features

Externally Set

16 QSOP

10 µMAX

μC

GAIN

1V/V

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