3 R29 LED5 475 1% B R41 33 2512 R25 LED1 475 1% R37 33 2512 Q4 RQJ0303PGDQALT 18 19 21 S4 R51 110 2 2 JP2 JP1 1 0 Q3 RQJ0303PGDQALT 1 2 1 2 JP3 2 3 JP4 4 A0 VCC A1 WP S3 2 A2 SCL VSS SDA Q2 RQJ0303PGDQALT R14 3.3k R1 100 1% 2 V+ IHP C12 IHM S12 ICMP C11 IBIAS S11 SDO C10 SDI 22 23 24 C9 CSB(ILM) S9 ISOMD C8 WDT S8 DRIVE C7 VREG S7 SWTEN C6 VREF1 S6 VREF2 C5 GPIO5 S5 GPIO4 C4 VM S4 NC C3 GPIO3 S3 GPIO2 C2 GPIO1 S2 C0 C1 S1 48 47 D 8 6 5 46 1 3 44 5 43 7 42 9 41 11 40 13 39 38 37 Q13 CZT5551 R63 OPT VIN VCC GND1 SCK MISO CS MOSI GND2 EESDA EEVCC EESCK EEGND GND3 NC 2 4 6 8 10 C 12 14 R73 OPT R62 1M 36 35 R68 10k NTC 34 33 32 C17 1uF C20 1uF C21 R67 1uF 10k C22 1uF 31 30 E8 29 28 27 26 25 E3 E7 C32 10nF R69 22k VREG E6 LTC6804VB GPIO5 GPIO4 R70 22k C33 10nF E5 E1 R71 R72 1M 1M C34 10nF WDT U2 24AA01 SOT-23-5 E4 C35 10nF S1 CUSTOMER NOTICE C0 C36 10nF NOTES: UNLESS OTHERWISE SPECIFIED, 1. ALL CAPACITORS AND RESISTORS ARE 0603. APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. GPIO3 GPIO2 GPIO1 3 TECHNOLOGY AK JON M. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC isoSPI 12-CELL BATTERY-STACK MONITOR IC NO. LTC6804IG-1 N/A DEMO CIRCUIT 1894B SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 R58 4.99K J2 SPI BOTTOM R53 R52 1K 1K 45 R13 3.3k R56 100 1% R57 4.99K C1 C1 OPT 0805 Q1 RQJ0303PGDQALT S2 12-16-11 R55 1M C2 C2 OPT 0805 DATE JON M. 7 E2 R61 0 5 100nF C3 C3 OPT 0805 APPROVED U3 24LC025-I/ST C19 SWTEN 3 C15 OPT 0805 ISOMD C4 R2 100 1% 1 D2 BAT46W-7-F 17 20 S5 T1 TG110-AE050N5 R15 3.3k 3 A 15 16 R3 100 1% 1 R38 33 2512 14 C4 OPT 0805 2 3 R26 LED2 475 1% 13 C31 10nF 8 6 R16 3.3k 1 R39 33 2512 12 R5 100 1% C5 C5 2 OPT Q5 0805 RQJ0303PGDQALT 2 3 R27 LED3 475 1% 11 C30 10nF 7 S10 SCK(ILP) 10 R4 100 1% 1 R40 33 2512 7 R17 3.3k 3 R28 LED4 475 1% 6 R18 3.3k 3 1 2 5 C29 10nF 3 4 1 2 Q6 RQJ0303PGDQALT 1 9 C6 C6 OPT 0805 DESCRIPTION 1ST PROTOTYPE R54 1M 8 R19 3.3k 1 SDA VCC Q7 RQJ0303PGDQALT 2 U1 LTC6804IG-1 4 C7 C7 OPT 0805 S7 REV __ C18 OPT 1206 VSS 2 1% C23 100nF 0805 100V ECO 3 R20 3.3k R7 100 1% 1 R66 OPT 1206 R50 110 3 C28 OPT 10nF 0805 9 5 1 Q8 RQJ0303PGDQALT 10 WP 2 C27 10nF 14 11 SCL 3 C13 100nF 100V 0805 R21 3.3k R8 100 1% C8 C8 2 3 R42 33 2512 R49 100 1% C9 C9 OPT 0805 S9 Q9 RQJ0303PGDQALT R6 100 1% R30 LED6 475 1% R64 100 C26 10nF 15 2 1 R9 100 1% 1 R43 33 2512 C10 C10 OPT 0805 S10 Q10 RQJ0303PGDQALT 2 3 R31 LED7 475 1% R10 100 1% 1 R44 33 2512 C14 OPT 0805 R22 3.3k 3 R32 LED8 475 1% S11 R23 3.3k 2 1 C CELL VOLTAGES 60V MAX J1 16 CELL12 15 CELL11 14 CELL10 13 CELL9 12 CELL8 11 CELL7 10 CELL6 9 CELL5 8 CELL4 7 CELL3 6 CELL2 5 CELL1 4 CELL0 R45 33 2512 C25 10nF 16 1 1 2512 3 R33 LED9 475 1% C11 OPT 0805 Q11 RQJ0303PGDQALT R65 OPT 1206 1 2 3 R34 LED10 R46 475 33 1% 2512 C11 SHIELD E10 3 3 R35 LED11 R47 475 33 1% C16 OPT 1206 R24 3.3k R11 100 1% D S12 C24 10nF 1 REVISION HISTORY isoSPI A J3 RJ45 1 Q12 RQJ0303PGDQALT 1 3 5 7 3 R48 33 2512 2 4 6 8 1 LED12 1 R36 475 1% C12 C12 OPT 0805 2 1 3 5 7 3 R12 100 1% 3 2 2 4 6 8 isoSPI B J4 RJ45 11 12 4 11 12 5 2 SCALE = NONE DATE: Friday, March 23, 2012 SHEET 1 1 REV. 1 OF 1 A