5 4 3 2 1 REVISION HISTORY ECO C1 100pF C2 100pF C3 100pF C4 100pF C5 100pF C6 100pF C7 100pF C8 100pF C9 100pF C10 100pF C11 100pF C12 100pF C13 100pF C14 100pF C15 100pF C16 100pF C17 100pF C18 100pF C19 100pF CH20 CH19 CH18 CH17 CH16 CH15 CH14 CH13 CH12 CH11 COM CH10 CH9 CH8 CH7 CH6 CH5 CH4 CH3 CH2 CH1 __ C20 100pF REV 1 DESCRIPTION APPROVED DATE 1ST PROTOTYPE MARK T. 02-20-14 C21 100pF D D VDD VDD VREF_BYP C32 0.1uF C C25 10uF 0805 VDD C26 0.1uF C27 0.1uF VDD VDD C28 0.1uF J1 A B C D C29 0.1uF CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 VREFOUT VREFP GND CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 U1 LTC2983 Q1 Q2 Q3 VDD GND LDO RESETN NCS SDI SDO SCK INTERRUPT 48 47 46 45 44 43 42 41 40 39 38 37 C30 10uF 0805 Q1 Q2 Q3 VDD C31 10uF 0805 C33 10uF 0805 CH19 EEVCC CH17 EESDA CH15 EESCL CH13 VDD E3 VDD R2 100k RESET NCS SDI SDO SCK B1 A1 B2 A2 B3 A3 B4 A4 B5 A5 B6 A6 B7 A7 B8 A8 B9 A9 B10 A10 COM CH11 CH9 E1 CH7 RESET CH5 INTERRUPT CH10 CH11 CH12 CH13 CH14 CH15 CH16 CH17 CH18 CH19 CH20 COM C34 10uF 0805 VDD 12 11 10 9 8 7 6 5 4 3 2 1 13 14 15 16 17 18 19 20 21 22 23 24 VREF R1 1 C24 10uF 0805 C23 0.1uF GND VREF_BYP NC GND VDD GND VDD GND VDD GND VDD GND C22 10uF 0805 VDD CH3 CH1 E2 INTERRUPT D1 C1 D2 C2 D3 C3 D4 C4 D5 C5 D6 C6 D7 C7 D8 C8 D9 C9 D10 C10 CH20 CH18 CH16 CH14 CH12 CH10 CH8 C CH6 CH4 CH2 HIROSE-FX2-40P-1.27DS E4 CH10 CH11 CH12 CH13 CH14 CH15 CH16 CH17 CH18 CH19 CH20 COM 25 26 27 28 29 30 31 32 33 34 35 36 GND GND CS SCK SDI SDO GND B EEVCC EESDA EESCL ARRAY EEPROM U2 24LC025-I /ST SCL SDA WP A2 A1 A0 R3 4.99k 6 5 7 3 2 1 R4 4.99k EEGND R5 4.99k NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL CAPACITORS ARE IN MICROFARADS, 0603. 2. ALL RESISTOR ARE IN OHMS, 0603. WP 4 C35 0.1uF 8 13 8 GND 3 GND GND HD2X7-079-MOLEX VDD VCC 1 V+ 2 5V 6 CS 4 SCK/SCL 7 MOSI/SDA 5 MISO 10 EEVCC 9 EESDA 11 EESCL 12 EEGND 14 AUX B GND J2 CUSTOMER NOTICE 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. A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 TECHNOLOGY KIM T. MARK T. TITLE: SCHEMATIC SIZE N/A SCALE = NONE 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DATE: 24-BIT PRECISION DIGITAL TEMPERATURE MEASUREMENT SYSTEM IC NO. REV. LTC2983CLX 1 DEMO CIRCUIT 2209A 02/20/2014, 05:24 PM SHEET 1 1 OF 1 A