1 2 REVISION HISTORY This circuit is proprietary to Linear Technology and supplied for use with Linear Technology parts. Customer Notice: Linear Technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application, Component substitution and printed circuit board layout may significantly affect circuit performance or reliability. Contact Linear Applications Engineering for assistance. ECO REV DESCRIPTION DATE PROTO 1 APPROVED 08/02/04 V+ +/-250V INPUT RANGE 2 2 3 + 0402 1 4 8 3 2 J3 1 VREF 3 1 JP3 JP4 1 3 A 3 V- V+ 7 3 1 3 2 2 5 4 3 2 JP8 1 1 2 3 P1 P3 P9 U2 LT1991CMS JP10 1 JP11 1 2 3 JP26 R2 49.9 1% 6 REF 2 1 3 M9 M3 M1 4 J1 5 4 3 2 VIN+ JP9 1 8 9 10 5 J2 2 VIN- JP7 1 3 2 JP6 1 0402 1 2 3 4 5 6 1 J4 VOUT 2 3 4 5 2 5 4 3 2 1 JP5 R1 49.9 1% 6 2 - 1 JP2 A U1 LT1990CS8 2 3 7 5 1 JP1 PRECISION MICROPOWER V- 2 3 3 2 1 JP12 1 JP14 3 3 JP16 1 JP17 1 JP18 1 3 V+ 3 30MHz/1000V/uS 3 E3 C3 10nF X7R 0402 C5 100nF X5R 0402 C9 4.7uF X5R 1206 C7 100nF X5R 0402 JP20 1 JP21 1 M4 M2 M1 1 2 3 P1 P2 P4 U3 LT1995CMS 1 JP22 REF JP25 2 OPT. COMP OUT CONTRACT NO. 1 3 V3 3 1 JP24 V- 0402 IN 5 3 1 JP23 B R3 49.9 1% 6 4 C8 4.7uF X5R 1206 C6 100nF X5R 0402 8 9 10 2 C4 100nF X5R 0402 3 2 C2 10nF X7R 0402 1 2 -2.5V to -15V E2 JP19 2 GND E1 2 +2.5V to +15V 2 2 V+ 3 B 2 7 2 1 2 JP15 3 2 1 JP13 3 APPROVALS R4 47 1% 0402 DRAWN C1 10nF X7R 0402 ENGINEER MEI DATE 08/02/04 CHECKED DESIGNER 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 TITLE SCH, LT1990CS8/LT1991CMS/LT1995CMS, CONFIGURABLE GAIN AMPLIFIERS APPROVED Thursday, October 14, 2004 1 TECHNOLOGY SIZE CAGE CODE SCALE: 2 FILENAME: DWG NO 819A-1.DSN REV DC819A SHEET 1 1 OF 1