EVALUATION KIT AVAILABLE MAX9928/MAX9929 -0.1V to +28V Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers General Description Features The MAX9928/MAX9929 low-cost, uni-/bidirectional, Wide -0.1V to +28V Common-Mode Range, high-side, current-sense amplifiers are ideal for monitor- Independent of Supply Voltage ing battery charge and discharge currents in notebooks, 2.5V to 5.5V Operating Supply Voltage cell phones, and other portable equipment. These devices 20A Quiescent Supply Current feature a wide -0.1V to +28V input common-mode voltage 0.4mV (max) Input Offset Voltage range, low 20A supply current with V less than 0.4mV, OS and a gain accuracy better than 1.0%. The input common- Gain Accuracy Better than 1% (max) mode range is independent of the supply voltage, ensur- SIGN Output Indicates Current Polarity ing that the current-sense information remains accurate Transconductance and Gain Versions Available even when the measurement rail is shorted to ground. 5A/mV (MAX9928F) The MAX9928F features a current output with a transcon- 50V/V (MAX9929F) ductance ratio of 5A/mV. An external resistor converts Pin Compatible with the MAX4372 in UCSP the output current to a voltage, allowing adjustable gain so that the input sense voltage can be matched to the Available in Ultra-Small, 3x2 UCSP maximum ADC input swing. The MAX9929F has a volt- (1mm x 1.5mm) and 8-Pin MAX Packages age output and integrates a 10k output resistor for a fixed voltage gain of 50V/V. Applications A digital SIGN output indicates direction of current flow, so Monitoring Charge/Discharge Currents in Portable/ the user can utilize the full ADC input range for measuring Battery-Powered Systems both charging and discharging currents. Notebook Computers General-System/Board-Level Current Monitoring The MAX9928/MAX9929 are fully specified over the Smart-Battery Packs/Chargers -40C to +125C automotive temperature range, and Precision Current Sources available in 6-bump UCSP (1mm x 1.5mm) and 8-pin Smart Cell Phones MAX packages. The UCSP package is bump-to-bump Super Capacitor Charge/Discharge compatible with the MAX4372 EBT. UCSP is a trademark and MAX is a registered trademark of Pin Configurations and Typical Operating Circuit appear at end of data sheet. Maxim Integrated Products, Inc. Ordering Information PART OUTPUT TYPE GAIN PIN-PACKAGE TOP MARK MAX9928FAUA+ Current G = 5A/mV 8 MAX m MAX9928FABT+T Current G = 5A/mV 3x2 UCSP +AAF m MAX9929FAUA+ Voltage A = 50V/V 8 MAX V MAX9929FABT+T Voltage A = 50V/V 3x2 UCSP +ADI V Note: All devices are specified over the -40C to +125C operating temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. 19-4251 Rev 4 9/14MAX9928/MAX9929 -0.1V to +28V Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers Absolute Maximum Ratings V , SIGN to GND .................................................-0.3V to +6V Operating Temperature Range ......................... -40C to +125C CC RS+, RS- to GND ..................................................-0.3V to +30V Storage Temperature Range ............................ -65C to +150C OUT to GND ............................................. -0.3V to (V + 0.3V) Junction Temperature ......................................................+150C CC Differential Input Voltage (V - V ) ..............................30V Lead Temperature (soldering, 10s) .................................+300C RS+ RS- OUT, SIGN Short Circuit to V or GND ..................Continuous Soldering Temperature (reflow) .......................................+260C CC Current into Any Pin .........................................................20mA Continuous Power Dissipation (T = +70C) A 6-Bump 1mm x 1.5mm UCSP (derate 3.9mW/C above +70C) ..........................308.3mW 8-Pin MAX (derate 4.8mW/C above +70C) ............388mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (V = -0.1V to +28V, V = 3.3V, V = (V - V ) = 0V, R = 10k for MAX9928F, T = -40C to +125C, unless oth- RS+ CC SENSE RS+ RS- OUT A erwise noted. Typical values are at T = +25C.) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS AMPLIFIER DC ELECTRICAL CHARACTERISTICS T = +25C 0.1 0.4 A V = 3.6V RS+ T = -40C to +125C 0.8 A Input Offset Voltage (Note 2) V mV OS T = +25C 0.6 1.0 A V = -0.1V RS+ T = -40C to +125C 3.0 A Common-Mode Input Range V (Note 3) -0.1 +28 V CMR T = +25C 93 104 A 2V V 28V RS+ T = -40C to +125C 87 A Common-Mode Rejection Ratio CMRR dB T = +25C 60 72 -0.1V V A RS+ +2V T = -40C to +125C 54 A Full-Scale Sense Voltage (Note 2) V MAX992 F 50 mV SENSE Gain (Note 2) A MAX9929F 50 V/V V T = +25C 0.3 1.0 MAX9929F, A V = 3.6V T = -40C to +125C 2.5 RS+ A Gain Accuracy (Notes 2, 6) % T = +25C 0.3 1.0 MAX9929F, A V = -0.1V T = -40C to +125C 2.8 RS+ A Transconductance (Note 2) G MAX9928F 5 A/mV M T = +25C 0.3 1.0 MAX9928F, A V = 3.6V T = -40C to +125C 2.5 Transconductance Accuracy RS+ A % (Note 2) T = +25C 0.3 1.0 MAX9928F, A V = -0.1V T = -40C to +125C 2.8 RS+ A 2V V 28V 0 1.6 6 RS+ Input Bias Current (Note 4) I , I A RS+ RS- -0.1V V +2V -80 +6 RS+ 2V V 28V 0.05 1 RS+ Input Offset Bias Current (Note 4) I A OS -0.1V V +2V 0.2 2 RS+ Input Leakage Current I , I V = 0V, V = V = 28V (Note 5) 0.05 1.0 A RS+ RS- CC RS+ RS- Maxim Integrated 2 www.maximintegrated.com