MAX4081 Maxim, MAX4081 Datasheet
MAX4081
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MAX4081 Summary of contents
Page 1
... The MAX4080/MAX4081 offer a high level of integration, resulting in a simple, accurate, and compact current-sense solution. The MAX4080/MAX4081 operate from a 4.5V to 76V sin- gle supply and draw only 75µA of supply current. These devices are specified over the automotive operating temperature range (-40°C to +125°C) and are available ® ...
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... ABSOLUTE MAXIMUM RATINGS V to GND ............................................................-0.3V to +80V CC RS+, RS- to GND....................................................-0.3V to +80V OUT to GND.............-0.3V to the lesser of +18V or (V REF1A, REF1B to GND (MAX4081 Only)....-0.3V to the lesser of +18V or (V Output Short Circuit to GND.......................................Continuous Differential Input Voltage ( ...............................±80V RS RS Current into Any Pin..........................................................±20mA Stresses beyond those listed under “ ...
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... REF1A = REF1B Input Voltage (V Range (MAX4081 Only) REF1A Input Voltage Range (V (MAX4081 Only) REF1A Rejection Ratio (MAX4081 Only) REF/REF1A Ratio (MAX4081 Only) REF1A Input Impedance (MAX4081 Only) _______________________________________________________________________________________ = 5V (MAX4081 only), V REF1B SENSE = +25°C.) (Notes CONDITIONS 48V, CC RS+ I (sinking) = 10µA ...
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... MAX4081F/T/ 2.5V REF1B REF1A Note 8: Output voltage is internally clamped not to exceed 18V. Note 9: Output settles to within 1% of final value. Note 10: The device will not experience phase reversal when overdriven. 4 _______________________________________________________________________________________ = 5V (MAX4081 only REF1B SENSE = +25°C.) (Notes CONDITION MAX4080F/T ...
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... POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 100k 100 1k FREQUENCY (Hz) MAX4081F/T/S SMALL-SIGNAL GAIN vs. FREQUENCY 100mV OUT P MAX4081S 35 30 MAX4081T 25 20 MAX4081F 0 1000 FREQUENCY (kHz) 75 100 125 10k 100k 1M 100 1000 5 ...
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... TEMPERATURE (°C) MAX4080F SMALL-SIGNAL TRANSIENT RESPONSE MAX4080 toc16 INPUT 5mV/div OUTPUT 25mV/div 20µs/div 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) = ∞ 20pF +25°C, unless otherwise noted.) LOAD A MAX4081 SUPPLY CURRENT vs 125 V = 2.5V REF 120 NO LOAD SENSE 115 110 105 100 95 ...
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... INPUT 100mV/div OUTPUT 2V/div 20µs/div MAX4081T LARGE-SIGNAL TRANSIENT RESPONSE MAX4080 toc26 INPUT 100mV/div OUTPUT 2V/div 20µs/div Voltage Output MAX4081S SMALL-SIGNAL TRANSIENT RESPONSE MAX4080 toc21 INPUT 1mV/div OUTPUT 50mV/div 20µs/div MAX4080S LARGE-SIGNAL TRANSIENT RESPONSE MAX4080 toc24 INPUT 33mV/div OUTPUT 2V/div 20µ ...
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High-Side, Current-Sense Amplifiers with Voltage Output ( 48V 0V RS+ SENSE LOAD V -TRANSIENT RESPONSE CC MAX4080 toc28 V = 20V RS 40V 20V STEP ...
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... N.C. No Connection. No internal connection. Leave open or connect to ground. GND Ground Voltage Output. For the unidirectional MAX4080, V OUT V . For the bidirectional MAX4081, the difference voltage (V SENSE proportional to V and indicates the correct polarity. SENSE RS- Load connection to the external sense resistor. Reference Voltage Input: Connect REF1B to REF1A or to GND (see the External Reference section) ...
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... High-Side, Current-Sense Amplifiers with Voltage Output I LOAD 4.5V TO 76V V SENSE BATTERY R SENSE RS MAX4081T Figure 1. MAX4081T OUT Transfer Curve V SENSE I LOAD R SENSE RS+ RS MAX4080 CURRENT A2 MIRROR Figure 2. MAX4080 Functional Diagram that swings above V voltage for positive-sense volt- ...
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... SENSE > The RS+ RS- tor’s power dissipation is exceeded, its value may drift or it may fail altogether. The MAX4080/MAX4081 sense a wide variety of cur- rents with different sense-resistor values. Table 1 lists common resistor values for typical operation. Voltage Output FULL-SCALE MAX4081 FULL-SCALE V ...
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... OUT REF causing errors in the sense voltage. Either use a four- terminal current-sense resistor or use Kelvin (force and sense) PC board layout techniques. Although the MAX4081 have fully symmetrical bidirec- tional V SENSE is usually higher from REF to V value causes the to GND (unless the supply voltage is at the lowest end of the operating range) ...
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... High-Side, Current-Sense Amplifiers with Power Management The bidirectional capability of the MAX4081 makes it an excellent candidate for use in smart battery packs. In the application diagram (Figure 5), the MAX4081 moni- tors the charging current into the battery as well as the discharge current out of the battery. The microcon- ...
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... Added automotive part designation 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. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...