5 4 3 2 1 REVISION HISTORY ECO REV DESCRIPTION DATE 2 PRODUCTION 05/17/10 APPROVED LEO C. D D VCC E3 VCC VCC E1 R1 1K 9 IN 2 13 11 GND 10 GND 7 GND GND 8 REF- C2 0.1uF 0.1uF 10uF 1 CS SCK SDI SD0 2 3 6 SCK 5 4 SDI 6 SDO 4 CS 7 5 11 10 6 7 3 B 2 WP A2 CUSTOMER NOTICE A1 A0 5 4 1% 3 MOSI/SDA MISO EESCL EEVCC EESDA EEGND NC B U2 24LC025-I/ST 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 A 16-BIT DELTA SIGMA SPI ADC IC NO. REV. LTC2470CDD N/A SCALE = NONE 14 5 TECHNOLOGY SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCK/SCL 0.1uF 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. MI VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. LEO C. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A R4 4.99K SDA 4 1 SCL 12 C CS GND 1% C5 5V 3 1% VCC R3 4.99K GND R2 4.99K 8 9 VUNREG GND IN C6 GND LTC2470CDD C VCC REFOUT U1 COMP 1 C3 C4 12 REFOUT 0.1uF J1 VCC 0.1uF E2 13 C1 8 E4 GND DEMO CIRCUIT 1628A DATE: Tuesday, June 01, 2010 2 SHEET 1 1 2 OF 1