E1 E2 R15 IN OUT 0.1 Ohm 3.3V-60V 2512 R22 0 OHM E10 V+ V+ R10 R9 100 0 U1 3V 1% ASSY LT6109IMS* C7 IC -A LT6109IMS-1 -B LT6109IMS-2 0.1uF 10 R7 SENSEHI SENSELO 3V 1k V+ 1 9 1 E3 LED1 1206 LED R4 RESET 2 10k EN /RST 8 C6 0402 E7 2 3 INC2 OPTIONAL E4 1% 7 CIN2 3V OUTC2 R2 6.65k 1% 3V 1k 4 OUTC1 INC1 V- 1 R5 10k 0402 E8 E5 CIN1 6 R3 5 LED2 R18 R1 R8 1206 LED IOUT OPTIONAL 2k Cout2 COUT2 OUTA 1.33k GND 1% R19 OPTIONAL 2 E6 COUT1 CUSTOMER NOTICE NOTES: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0603 2. ALL CAPACTORS ARE IN MICRO FARADS, 0603 3. INSTALL SHUNTS AT J1 PIN 1+2 4. OPTIONAL COMPONENTS ARE NOT INSTALLED LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMERSUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS PCB DES. THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 1630 McCarthy Blvd. Milpitas, CA 95035 PH: (408) 432-1900 WWW.LINEAR.COM LTC CONFIDENTIAL FORCUSTOMER USE ONLY APPROVALS CL CUYLER L. SCALE = NONE TITLE: SCHEMATIC PRECISION CURRENT SENSE WITH COMPARATORS AND REFERENCE SIZE N/A DATE: IC NO. 05/2010 LT6109IMS-1/-2 DEMO CIRCUIT 1659A REV 1 SH 1 of 2 V+ 3V V+ U2 LT3010-ADJ 1uF OUT SHDN SENSE V- R20 1 3V 0 2 R12 13.7k OPTIONAL U4 C2 C5 0402 R21 1 0.47uF Rst Out 6 0.1uF 4 0402 2 GND V+ Set Div R14 3V 5 10k R16 0402 3 1 SW1 R6 RESET 118k 1Meg 4 0402 LT6991 0402 2 R17 392k 0402 R11 0 ohm 0402 JP1 JUMPER2 MAN 1 RESET RESET 2 U3 AUTO 1 3 R23 2 1Meg E9 Trig Out GND V+ Set Div 6 5 0402 C4 *MAY APPEAR AS C3 ON DEMOBOARD 3 R13 249k 0402 CUSTOMER NOTICE 0.1u 4 0402 LT6993-1 1630 McCarthy Blvd. Milpitas, CA 95035 PH: (408) 432-1900 WWW.LINEAR.COM LTC CONFIDENTIAL FORCUSTOMER USE ONLY APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMERSUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS PCB DES. THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. RST 3V 5 C1 IN 3V 8 CL CUYLER L. SCALE = NONE TITLE: SCHEMATIC PRECISION CURRENT SENSE WITH COMPARATORS AND REFERENCE SIZE N/A DATE: IC NO. 05/2010 LT6109IMS-1/-2 DEMO CIRCUIT 1659A REV 1 SH 2 of 2