5 1 R1 R2 R3 4.99K 4.99K 4.99K 1% 1% 1% 11 8 C3 0.1UF,16V 7 12 6 14 5 VCC A0 WP A1 SCL A2 1 4 2 3 GND E1 U7 (NOTE 3) NC7WB66K8X 2 3 4 I2C ADDRESS VCC 1B OE1 OE2 2B GND 2A VCC D 7 2 LDAC 3 SCL 4 JP7 CA2 SDA 5 CA2 6 1 E9 CA0 VOUTA CA1 REFLO LDAC GND SCL REF SDA CA2 VCC VCC GND B C 6 VREF E2 VREF HD2X3-079 E5 GND GND 6 OUT C6 1UF,10V C VOUTB 12 11 10 9 8 7 REFLO VOUTA REFLO EXT JP5 GND R6 100 R7 7.5K C9 100PF VREF VOUTB R4 100 VCC C7 0.1UF,16V R5 7.5K VREF U2 LTC2422CMS 1 2 CH1 3 CH0 4 5 VCC F0 FSSET SCK CH1 SDO CH0 ZSSET 10 SCK 9 VCC 8 CS 7 GND 6 JP3 ADC B DISABLE ENABLE R8 R9 10K 100 C10 100PF E6 E7 13 CA1 B 4 C12 0.1UF,16V 5 U1 LTC2607CDE 1 2 R11 10K 6 VCC C8 0.1UF,16V CA0 C5 1UF,10V A 8 JP4 VCC CA0 JP6 CA1 IN C11 1UF,10V VCC 1A OUT 1 4.096V 3 2.5V 5 U5 LT1790ACS6-2.5 4 1 6 JP1 VREF E4 VCC R10 10K 5.0V SDA VSS 4 V+ E3 PWR GND VOUTA VOUTB R12 7.5K E8 NOTES: UNLESS OTHERWISE SPECIFIED A IN GND 9 GND 10 U4 LT1790ACS6-4.096 V+ GND GND U6 24LC025 C LDAC C4 1UF,10V MISO 13 8 3 GND NC 5V REG 5V REF MOSI GND EEGND GND CS SCK JP2 VCC 6 OUT 2 EESCL IN 1 EESDA VCC +5V U3 LT1790ACS6-5 V+ 4 MOSI 7 MISO 5 EEVCC C2 1UF,10V 2 +5V 1 CS 6 SCK 4 1 C1 1UF,10V 5V 2 D 2 GND V+ V+ 3 2 J1 HD2X7-079-MOLEX 4 1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE IN MICROFARADS, 0402. 2. INSTALL SHUNTS ON JP1-JP7 PIN 1 AND 2. 3. U7 MULTIPLEXES THE SPI AND I2C BUSSES AND IS FOR COMPATIBILITY WITH THE DC590 CONTROLLER BOARD ONLY. 5 4 CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRUIT BOARD 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. 3 CONTRACT NO. APPROVALS DRAWN: APPROVED: ENGINEER: MARK T. DESIGNER: TECHNOLOGY KIM T. CHECKED: TITLE: 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only SCHEMATIC 16-BIT DUAL RAIL-TO-RAIL DAC WITH I2C INTERFACE SIZE A DATE: 2 DWG NO. DC934A-LTC2607CDE Monday, September 26, 2005 SHEET 1 1 REV A OF 1 A