LT1991CMS#PBF Analog Devices

LT1991 Precision, 100A Gain Selectable Amplifier FEATURES DESCRIPTION n Pin Configurable as a Difference Amplifier, The LT 1991 combines a precision operational amplifier Inverting and Noninverting Amplifier with eight precision resistors to form a one-chip solution n Difference Amplifier for accurately amplifying voltages. Gains from 13 to 14 Gain Range 1 to 13 with a gain accuracy of 0.04% can be achieved using no CMRR >75dB external components. The device is particularly well suited n Noninverting Amplifier for use as a difference amplifier, where the excellent resis- tor matching results in a common mode rejection ratio of Gain Range 0.07 to 14 n greater than 75dB. Inverting Amplifier Gain Range 0.08 to 13 The amplifier features a 50V maximum input offset volt- n Gain Error <0.04% age and a gain bandwidth product of 560kHz. The device n Gain Drift < 3ppm/C operates from any supply voltage from 2.7V to 36V and n Wide Supply Range: Single 2.7V to Split 18V draws only 100A supply current on a 5V supply. The n Micropower: 100A Supply Current output swings to within 40mV of either supply rail. n Precision: 50V Maximum Input Offset Voltage The resistors have excellent matching, 0.04% over tem- n 560kHz Gain Bandwidth Product perature for the 450k resistors. The matching temperature n Rail-to-Rail Output coefficient is guaranteed less than 3ppm/C. The resis- n Space Saving 10-Lead MSOP and DFN Packages tors are extremely linear with voltage, resulting in a gain nonlinearity of less than 10ppm. APPLICATIONS The LT1991 is fully specified at 5V and 15V supplies n Handheld Instrumentation and from 40C to 125C. The device is available in space n Medical Instrumentation saving 10-lead MSOP and low profile (0.8mm) 3mm n Strain Gauge Amplifiers 3mm DFN packages. n Differential to Single-Ended Conversion L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Rail-to-Rail Gain = 1 Difference Amplifier Distribution of Resistor Matching V = V + V OUT REF IN 5V 40 SWING 40mV TO 450k RESISTORS EITHER RAIL LT1991A R <0.1 35 OUT 50k 450k 30 150k 25 450k 4pF V M(IN) 20 V IN 450k 15 + V LT1991 P(IN) + 10 150k 450k INPUT RANGE 0.5V TO 5.1V 5 50k R = 900k IN 0 4pF 0.04 0.02 0 0.02 0.04 RESISTOR MATCHING (%) V = 2.5V REF 1991 TA01 1991 TA01b 1991fh 1 PERCENTAGE OF UNITS (%)LT1991 ABSOLUTE MAXIMUM RATINGS (Note 1) Specified Temperature Range (Note 5) + Total Supply Voltage (V to V ) ................................40V LT1991C ...............................................40C to 85C Input Voltage (Pins P1/M1, Note 2) ........................60V LT1991I ................................................40C to 85C Input Voltage LT1991H ............................................. 40C to 125C + (Other Inputs Note 2) ..................V + 0.2V to V 0.2V Maximum Junction Temperature Output Short-Circuit Duration (Note 3) ........... Indefinite DD Package ......................................................... 125C Operating Temperature Range (Note 4) MS Package ......................................................... 150C LT1991C ...............................................40C to 85C Storage Temperature Range LT1991I ................................................40C to 85C DD Package ........................................... 65C to 125C LT1991H ............................................. 40C to 125C MS Package ........................................... 65C to 150C Lead Temperature (Soldering, 10 sec) ..................300C PIN CONFIGURATION TOP VIEW TOP VIEW P1 1 10 M1 P1 1 10 M1 P3 2 9 M3 P3 2 9 M3 P9 3 8 M9 P9 3 8 M9 V 4 7 V V 4 7 V EE CC EE CC REF 5 6 OUT REF 5 6 OUT MS PACKAGE 10-LEAD PLASTIC MSOP DD PACKAGE 10-LEAD (3mm 3mm) PLASTIC DFN T = 150C, q = 230C/W JMAX JA EXPOSED PAD CONNECTED TO V PCB EE CONNECTION OPTIONAL T = 125C, q = 43C/W JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT1991CDD PBF LTCT1991CDD TRPBF LBMM 10-Lead (3mm 3mm) Plastic DFN 0C to 70C LT1991ACDD PBF LT1991ACDD TRPBF LBMM 10-Lead (3mm 3mm) Plastic DFN 0C to 70C LT1991IDD PBF LT1991IDD TRPBF LBMM 10-Lead (3mm 3mm) Plastic DFN 40C to 85C LT1991AIDD PBF LT1991AIDD TRPBF LBMM 10-Lead (3mm 3mm) Plastic DFN 40C to 85C LT1991HDD PBF LT1991HDD TRPBF LBMM 10-Lead (3mm 3mm) Plastic DFN 40C to 125C LT1991CMS PBF LT1991CMS TRPBF LTQD 10-Lead Plastic MSOP 0C to 70C LT1991ACMS PBF LT1991ACMS TRPBF LTQD 10-Lead Plastic MSOP 0C to 70C LT1991IMS PBF LT1991IMS TRPBF LTQD 10-Lead Plastic MSOP 40C to 85C LT1991AIMS PBF LT1991AIMS TRPBF LTQD 10-Lead Plastic MSOP 40C to 85C LT1991HMS PBF LT1991HMS TRPBF LTQD 10-Lead Plastic MSOP 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: