LT1990 250V Input Range G = 1, 10, Micropower, Difference Amplifier FEATURES DESCRIPTIO Pin Selectable Gain of 1 or 10 The LT 1990 is a micropower precision difference ampli- High Common Mode Voltage Range: fier with a very high common mode input voltage range. It 85V Window (V = 5V, 0V) S has pin selectable gains of 1 or 10. The LT1990 operates 250V (V = 15V) S over a 250V common mode voltage range on a 15V Common Mode Rejection Ratio: 70dB Min supply. The inputs are fault protected from common Input Protection to 350V mode voltage transients up to 350V and differential Gain Error: 0.28% Max voltages up to 500V. The LT1990 is ideally suited for both PSRR: 82dB Min high side and low side current or voltage monitoring. High Input Impedance: 2M Differential, On a single 5V supply, the LT1990 has an adjustable 85V 500k Common Mode input range, 70dB min CMRR and draws less than 120A Micropower: 120A Max Supply Current supply current. The rail-to-rail output maximizes the dy- Wide Supply Range: 2.7V to 36V namic range, especially important for single supplies as 3dB Bandwidth: 100kHz low as 2.7V. Rail-to-Rail Output 8-Pin SO Package The LT1990 is specified for single 3V, 5V and 15V U supplies over both commercial and industrial temperature APPLICATIO S ranges. The LT1990 is available in the 8-pin SO package. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Battery Cell Voltage Monitoring All other trademarks are the property of their respective owners. High Voltage Current Sensing Signal Acquisition in Noisy Environments Input Protection Fault Protected Front Ends Level Sensing Isolation TYPICAL APPLICATIO Full-Bridge Load Current Monitor +V SOURCE 5V LT1990 900k 10k 8 7 100k 1M 2 R 6 S V OUT + 1M 3 + V = 1.5V I L REF 4 10k 5 OUT IN 54.9k 1nF LT6650 40k 900k GND FB 100k 40k 20k 12V V 73V CM V = V (10 I R ) 1 OUT REF L S 1990 TA01 1F 1990fb 1 U ULT1990 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Notes 1, 2) TOP VIEW + Total Supply Voltage (V to V ) ............................... 36V REF 1 8 GAIN1 Input Voltage Range + IN 2 7 V Continuous ...................................................... 250V +IN 3 6 OUT Transient (0.1s) ............................................... 350V V 4 5 GAIN2 Differential ....................................................... 500V Output Short-Circuit Duration (Note 3) ............ Indefinite S8 PACKAGE 8-LEAD PLASTIC SO Operating Temperature Range (Note 4) T = 150C, = 190C/W JMAX JA LT1990C .............................................. 40C to 85C ORDER PART NUMBER S8 PART MARKING LT1990I ............................................... 40C to 85C LT1990CS8 1990 LT1990H ........................................... 40C to 125C LT1990IS8 1990I Specified Temperature Range (Note 5) LT1990HS8 1990H LT1990C .............................................. 40C to 85C LT1990ACS8 1990A LT1990I ............................................... 40C to 85C LT1990AIS8 1990AI LT1990H ........................................... 40C to 125C LT1990AHS8 1990AH Junction Temperature........................................... 150C Order Options Tape and Reel: Add TR Storage Temperature Range .................. 65C to 150C Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Temperature (Soldering, 10 sec.)................. 300C Lead Free Part Marking: