5 4 3 2 1 REVISION HISTORY ECO REV __ VCC 1 DESCRIPTION APPROVED REBUILD WITH CHANGE DATE MARK T. 04-03-12 INT EXT 1 2.5V E8 IN U1 LTC2642ACDD-16 10 9 8 1 8 1 6 3 3 + 2 - 7 INV E4 1 V- WP SDA 3 7 4 3 A2 2 2 A1 5 1 A0 2 EXT JP6 LD NCLR 1 2 3 4 5 6 7 8 8 6 VOUT JP4 BIP 7 INV E5 1 DAC3 BUF 2 R3 VV+ 0 E6 U9 OPT SOT23-5 3 + 4 - B GND 1 SPI BUS 3 V- 3 C14 0.1uF C15 0.1uF C16 0.1uF C17 C18 C19 C20 0.1uF 0.1uF 0.1uF 0.1uF V+ U5A OPT S8 8 E14 EXT U8A OPT S08 UNI C12 OPT 3 + 2 - 5 4 1 VCC SDI U4 LTC2642ACDD-16 JP5 V+ SCK 4 SCL GND 5 1% 6 2 1% VREF 3 1% DAC3 DIRECT V+ R9 0 0.1uF 1 R6 4.99K C6 C R2 0 VDD R5 4.99K DAC2 JP3 1 0.1uF C13 0.1uF 3 + 2 - 2 1 1 4 GND JP7 V- VV+ V+ VDD CUSTOMER NOTICE V+ 7 7 8 8 5 + 6 - U7B LT1678CS8 5 + 6 - U8B OPT S08 7 4 5 + 6 4 4 7 U6B LTC6078ACMS8 4 U5B OPT S8 8 A 8 U7A LT1678CS8 4 UNI C11 OPT 2 1 RFB NCLR V+ BIP REF C8 E13 5 + 6 - DAC1 VREF VOUT RFB 14 VDD AMP V- E3 3 + 2 - E10 R4 4.99K B GND LD 12 24LC025-I/ST E12 SDI U2 LTC2642ACDD-16 U3 AMP V+ U6A LTC6078ACMS8 7 INV 8 5 11 REF 9 2 VDD 5 SCK GND 4 10 7 GND GND 3 3 8 13 GND NC 6 VOUT 8 EESDA EEGND 4 11 EEVCC 6 9 EESCL VREF R8 0 VDD MISO 0.1uF GND MOSI/SDA GND VDD C3 10 CS SCK/SCL 1 2 8 5V C 4.7uF VCC VUNREG NCLR C10 4 J1 LD 5 5 TRIM SDI 2 6 OUT GND 2 SCK 4 1 U11 LT1019CS8-2.5 3 VREF D E2 4 2 VREF E9 R7 0 0.1uF 9 5V C1 REF 4 10uF R1 10K JP1 VDD 3 4.7uF VREF 1 C9 RFB 5 TRIM GND OUT VDD 8 IN 6 10 2 C4 GND E1 C21 0.1uF 11 E7 11 V+ 10uF U10 LT1236CCS8-5 GND D 2 C5 VDD 3 JP2 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. KIM T. MARK T. 5 V- 4 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 3 TITLE: SCHEMATIC SIZE VV- TECHNOLOGY N/A SCALE = NONE 2 DATE: IC NO. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 16-BIT VOUT DAC LTC2642ACDD-16 REV. 1 DEMO CIRCUIT 1096B 04/03/2012, 11:06 AM SHEET 1 1 OF 1 A