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MAX971CSA Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX971CSA Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 17 page Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators _______________________________________________________________________________________ 9 Detailed Description The MAX971–MAX974/MAX981–MAX984 comprise various combinations of a micropower 1.182V reference and micropower comparators. The Typical Operating Circuit shows the MAX971/MAX981 configuration, and Figures 1a–1d show the MAX9_2–MAX9_4 configurations. Internal hysteresis in the MAX9_1, MAX982, and MAX9_3 provides the easiest method for implementing hysteresis. It also produces faster hysteresis action and consumes much less current than circuits using external positive feedback. Power-Supply and Input Signal Ranges This family of devices operates from a single 2.5V to 11V power supply. The MAX9_1 and MAX9_4 have a separate ground for the output driver, allowing operation with dual supplies ranging from ±1.25V to ±5.5V. Connect V- to GND when operating the MAX9_1 or MAX9_4 from a single supply. The maximum total supply voltage in this case is still 11V. For proper comparator operation, the input signal can range from the negative supply (V-) to within one volt of the positive supply (V+ - 1V). The guaranteed common- mode input voltage range extends from V- to (V+ - 1.3V). The inputs can be taken above and below the supply rails by up to 300mV without damage. OUTA V- INA+ INA- OUTB V+ INB+ INB- MAX972 1 (A1) 2 (C2) 3 (C1) 4 (B1) 8 (A3) 7 (A2) 6 (C3) 5 (B3) ( ) BUMPS FOR THE UCSP Figure 1a. MAX972 Functional Diagram OUTA V- INA+ INB- OUTB V+ REF HYST MAX9_3 1 2 3 4 8 7 6 5 V- Figure 1c. MAX973/MAX983 Functional Diagram (Window Comparator) OUTA V- INA+ INB+ OUTB V+ REF HYST MAX982 1 2 3 4 8 7 6 5 V- Figure 1b. MAX982 Functional Diagram OUTA V+ INA- INA+ OUTD GND IND+ IND- MAX9_4 2 3 4 5 15 14 13 12 16 11 10 9 1 6 7 8 OUTB INB- INB+ REF OUTC INC+ INC- V- Figure 1d. MAX974/MAX984 Functional Diagram |
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Similar Description - MAX971CSA |
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