LT1996 Precision, 100A Gain Selectable Amplifier FEATURES DESCRIPTIO Pin Configurable as a Difference Amplifier, The LT 1996 combines a precision operational amplifier Inverting and Noninverting Amplifier with eight precision resistors to form a one-chip solution Difference Amplifier for accurately amplifying voltages. Gains from 117 to Gain Range 9 to 117 118 with a gain accuracy of 0.05% can be achieved without CMRR >80dB any external components. The device is particularly well Noninverting Amplifier suited for use as a difference amplifier, where the excellent Gain Range 0.008 to 118 resistor matching results in a common mode rejection Inverting Amplifier ratio of greater than 80dB. Gain Range 0.08 to 117 The amplifier features a 50V maximum input offset Gain Error: <0.05% voltage and a gain bandwidth product of 560kHz. The Gain Drift: < 3ppm/C device operates from any supply voltage from 2.7V to 36V Wide Supply Range: Single 2.7V to Split 18V and draws only 100A supply current on a 5V supply. The Micropower Operation: 100A Supply output swings to within 40mV of either supply rail. Input Offset Voltage: 50V (Max) The internal resistors have excellent matching character- Gain Bandwidth Product: 560kHz Rail-to-Rail Output istics variation is 0.05% over temperature with a guaran- Space Saving 10-Lead MSOP and DFN Packages teed matching temperature coefficent of less than 3ppm/C. The resistors are also extremely stable over voltage, U exhibiting a nonlinearity of less than 10ppm. APPLICATIO S The LT1996 is fully specified at 5V and 15V supplies and Handheld Instrumentation from 40C to 85C. The device is available in space Medical Instrumentation saving 10-lead MSOP and DFN packages. For an amplifier Strain Gauge Amplifiers with selectable gains from 13 to 14, see the LT1991 data Differential to Single-Ended Conversion sheet. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patents Pending. TYPICAL APPLICATIO Rail-to-Rail Gain = 9 Difference Amplifier Distribution of Resistor Matching V = V + 9 V OUT REF IN 15V 40 SWING 40mV TO LT1996A EITHER RAIL G = 81 35 450k/81 450k 30 4pF 450k/27 25 450k/9 V M(IN) 20 V IN 15 450k/9 + V P(IN) + LT1996 10 450k/27 INPUT RANGE 450k 60V 5 450k/81 R = 100k 4pF IN 0 0.04 0.02 0 0.02 0.04 V REF RESISTOR MATCHING (%) 1996 TA01 15V 1996 TA01b 1996f 1 PERCENTAGE OF UNITS (%) U ULT1996 ABSOLUTE AXI U RATI GS (Note 1) + Total Supply Voltage (V to V ) ............................... 40V Maximum Junction Temperature Input Voltage (Pins P9/M9, Note 2) ....................... 60V DD Package ...................................................... 125C Input Current MS Package ..................................................... 150C (Pins P27/M27/P81/M81, Note 2) .................. 10mA Storage Temperature Range Output Short-Circuit Duration (Note 3) ............ Indefinite DD Package .......................................65C to 125C Operating Temperature Range (Note 4) ...40C to 85C MS Package ......................................65C to 150C Specified Temperature Range (Note 5) ....40C to 85C MSOPLead Temperature (Soldering, 10 sec)...... 300C UUW PACKAGE/ORDER I FOR ATIO ORDER PART ORDER PART TOP VIEW NUMBER NUMBER P9 1 10 M9 TOP VIEW P27 2 9 M27 LT1996CDD LT1996CMS P9 1 10 M9 P27 2 9 M27 P81 3 8 M81 LT1996IDD LT1996IMS P81 3 8 M81 V 4 7 V EE CC V 4 7 V EE CC LT1996ACDD LT1996ACMS REF 5 6 OUT REF 5 6 OUT LT1996AIDD LT1996AIMS MS PACKAGE DD PACKAGE 10-LEAD PLASTIC MSOP 10-LEAD (3mm 3mm) PLASTIC DFN DD PART MARKING* T = 150C, = 230C/W MS PART MARKING* JMAX JA T = 125C, = 160C/W JMAX JA UNDERSIDE METAL CONNECTED TO V EE LBPC LTBPB (PCB CONNECTION OPTIONAL) *Temperature and electrical grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. Difference amplifier configuration, V = 5V, 0V or 15V A S V = V = half supply, unless otherwise noted. CM REF SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS G Gain Error V = 15V, V = 10V R = 10k S OUT L G = 81 LT1996AMS 0.02 0.05 % G = 27 LT1996AMS 0.03 0.06 % G = 9 LT1996AMS 0.03 0.07 % G = 81 LT1996ADD 0.02 0.05 % G = 27 LT1996ADD 0.02 0.07 % G = 9 LT1996ADD 0.03 0.08 % G = 81 LT1996 0.04 0.12 % G = 27 LT1996 0.04 0.12 % G = 9 LT1996 0.04 0.12 % GNL Gain Nonlinearity V = 15V V = 10V R = 10k G = 9 1 10 ppm S OUT L G/T Gain Drift vs Temperature (Note 6) V = 15V V = 10V R = 10k 0.3 3 ppm/C S OUT L CMRR Common Mode Rejection Ratio, V = 15V G = 9 V = 15.3V S CM Referred to Inputs (RTI) LT1996AMS 80 100 dB LT1996ADD 80 100 dB LT1996 70 100 dB V = 15V G = 27 V = 14.5V to 14.3V S CM LT1996AMS 95 105 dB LT1996ADD 90 105 dB LT1996 75 105 dB 1996f 2 U WWW