MAX9927AEE+ Maxim Integrated Products, MAX9927AEE+ Datasheet
MAX9927AEE+
Specifications of MAX9927AEE+
Related parts for MAX9927AEE+
MAX9927AEE+ Summary of contents
Page 1
... Precision Amplifier and Comparator Allows Small-Signal Detection o User-Enabled Internal Adaptive Peak Threshold or Flexible External Threshold o Zero-Crossing Detection Provides Accurate Phase Information PART MAX9924UAUB+ MAX9925AUB+ MAX9926UAEE+ MAX9927AEE+ + Denotes a lead(Pb)-free/RoHS-compliant package. PART MAX9924UAUB MAX9925AUB MAX9926UAEE Applications MAX9927AEE µMAX is a registered trademark of Maxim Integrated Products, Inc. DIFFERENTIAL ...
Page 2
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold ABSOLUTE MAXIMUM RATINGS V to GND .............................................................-0. All Other Pins..............................................-0. Current into IN+, IN-, IN_+, IN_-.......................................±40mA Current into All Other Pins ................................................±20mA Output ...
Page 3
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold ELECTRICAL CHARACTERISTICS (continued 5V 0V, MAX9925/MAX9927 gain setting = 1V/V, Mode A1 GND 50pF unless otherwise noted. ...
Page 4
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold ELECTRICAL CHARACTERISTICS (continued 5V 0V, MAX9925/MAX9927 gain setting = 1V/V, Mode A1 GND 50pF unless otherwise noted. ...
Page 5
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold ( 0V, MAX9925/MAX9927 gain setting = 1V/V. All values are GND INPUT OFFSET VOLTAGE DISTRIBUTION BIN SIZE ...
Page 6
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold ( 0V, MAX9925/MAX9927 gain setting = 1V/V. All values are GND MINIMUM AND ZERO-CROSSING THRESHOLD vs. TEMPERATURE 2.5V CM ...
Page 7
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold PIN MAX9924 MAX9925 MAX9926 MAX9927 1 1 — — — 3 — 3 — — — — ...
Page 8
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold V CC 100kΩ IN 100kΩ IN+ INTERNAL REFERENCE 2.5V BIAS 8 _______________________________________________________________________________________ 100kΩ OP AMP 100kΩ COMPARATOR BUFFER 30% PEAK DETECTOR V MIN THRESHOLD MODE LOGIC INT_THRS ...
Page 9
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold IN+ BIAS BUFFER _______________________________________________________________________________________ Functional Diagrams (continued) OUT MAX9925 OP AMP COMPARATOR 30% PEAK DETECTOR V MIN THRESHOLD EXT V CC GND 85ms COUT ...
Page 10
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold V CC 100kΩ IN1 100kΩ IN1+ INTERNAL REFERENCE 2.5V BIAS1 EXT1 V CC 100kΩ IN2 100kΩ IN2+ BIAS2 EXT2 10 ______________________________________________________________________________________ Functional Diagrams (continued) 100kΩ ...
Page 11
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold V CC IN1 IN1+ BIAS1 BUFFER V CC IN2 IN2+ BIAS2 BUFFER ______________________________________________________________________________________ Functional Diagrams (continued) OUT1 MAX9927 OP AMP COMPARATOR 30% PEAK DETECTOR V ...
Page 12
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold Detailed Description The MAX9924–MAX9927 interface with variable reluc- tance (VR) or magnetic coil sensors. These devices produce accurate pulses aligned with flywheel gear- teeth even when the pickup signal ...
Page 13
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold Differential Amplifier The input operational amplifier is a rail-to-rail input and output precision amplifier with CMOS input bias cur- rents, low offset voltage (V ) and drift. A novel ...
Page 14
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold The zero-crossing signal provides true timing informa- tion for engine-control applications. The zero-voltage level in the VR sensor signal corresponds to the center of the gear-tooth and is the ...
Page 15
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold 10kΩ VR SENSOR 10kΩ 1kΩ 10μF || 0.1μF Figure 2. MAX9924/MAX9926 Operating Mode A1 10kΩ VR SENSOR 10kΩ Figure 3. MAX9924/MAX9926 Operating Mode A2 ______________________________________________________________________________________ IN+ 1nF COUT IN- ...
Page 16
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold 10kΩ VR SENSOR 10kΩ 1kΩ 10μF || 0.1μF Figure 4. MAX9924/MAX9926 Operating Mode B 10kΩ VR SENSOR 10kΩ 1kΩ 10μF || 0.1μF Figure 5. MAX9924/MAX9926 Operating Mode C 16 ...
Page 17
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold 10kΩ VR 1nF SENSOR 10kΩ 1kΩ 10μF || 0.1μF Figure 6. MAX9925/MAX9927 Operating Mode A 10kΩ VR 1nF SENSOR 10kΩ 1kΩ 10μF || 0.1μF Figure 7. MAX9925/MAX9927 Operating Mode ...
Page 18
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold 10kΩ VR 1nF SENSOR 10kΩ 1kΩ 10μF || 0.1μF Figure 8. MAX9925 Operating Mode C 18 ______________________________________________________________________________________ Application Circuits (continued) OUT IN- COUT IN+ MAX9925 BIAS 1kΩ V +5V ...
Page 19
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold VR SENSOR ______________________________________________________________________________________ 4. 100kΩ 100kΩ IN AMP 100kΩ IN+ 100kΩ BANDGAP REFERENCE VOLTAGE = BUFFER ...
Page 20
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold TOP VIEW + IN_THRS1 1 EXT1 2 BIAS1 3 MAX9926 COUT1 4 COUT2 5 BIAS2 6 EXT2 7 INT_THRS2 8 QSOP TOP VIEW + IN+ 1 IN- 2 N.C. ...
Page 21
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package ...
Page 22
Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package ...
Page 23
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23 © 2011 Maxim Integrated Products ...