1 2 E1 4 6 7 C6 0.1uF 50V 3 C13 0.1uF 50V 8 3 + E6 4 31 50 42 52 2 49 RFBA ROFSA CLR REFB 30 RCOMA R3 10K E4 U1 LTC2754AIUKG-16 10 R2 10K 41 1 R1 10K REF4 REF1 VDD 2 A U3A LT1469CS8 V- RINA C15 0.1uF VCC C7 150pF 1 VCC 39 D3 LED GREEN C16 27pF IOUT1A IOUT2A RFLAG VOSADJA 48 3 6 - 5 + VOSADJA 47 7 U3B LT1469CS8 7 E18 REFADJD REFADJD 22 29 6 - 5 + VOSADJC 21 GND 19 12 VOSADJD 20 REFADJC REF2 REFADJD REF3 U4A LT1469CS8 - 5 + 7 U4B LT1469CS8 VCC REF2 E21 1 5 R6 4.99K U6 24LC025 9 8 11 7 6 12 5 VCC A0 WP A1 SCL A2 SDA VSS 1 2 V+ D4 BAT54C 3 4 TP5 VSS C23 10uF 16V REF1 REF3 E24 REF3 REF4 E26 2 2 - 3 + 1 E12 OUTC E14 GND E15 OUTD E17 GND E19 VOSADJA E20 VOSADJB E22 VOSADJC E25 VOSADJD B V- 2 VIN VOUT 6 C24 10uF 16V 6 4 2 5 3 1 5V EXT. JP11 6 4 2 0 6 4 2 5V EXT. 1 2 3 3 4 S1 JP7 VOSADJC 1 2 3 GND VOSADJC VCC 5 3 1 M-SPAN JP10 VOSADJD 1 2 3 GND EXT. VOSADJD VCC D LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY VCC 5 3 1 JP12 1 JP9 E27 VOSADJB EXT. S0 C VOSADJA EXT. JP8 VCC REF4 5 3 1 Linear Technology Corporation Customer Notice 5V 1630 McCarthy Blvd. Milpitas, CA. 95035 Phone (408) 432-1900 Fax (408) 434-0507 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 Circuit 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. EXT. JP13 4 WP TP6 E23 VCC U7 LT1236ACS8-5 3 14 REF1 REF3 REF4 10 6 4 2 REF2 7 R5 4.99K GND C19 27pF JP6 VOSADJB 1 2 3 GND VCC S2 S1 S2 0 3 8 13 NC 6 4 TP4 C22 0.1uF EEGND 1 U5A LT1469CS8 4 REF2 REF1 EESCL + 150pF V- GND EESDA - 3 C21 6 R4 4.99K EEVCC GND GND GND C20 150pF 2 MISO TP3 2 SDO 1 SDA/MOSI TP2 SDI V+ JP5 VOSADJA 1 2 3 GND S0 M-SPAN TP1 CS SCK/SCL SCK OUTB V- EXT. 8 1 CS E9 E11 REFADJB J1 HD2X7 2 1 U2A LT1469CS8 7 RFBD ROFSD VOSADJD GND 18 17 REFD 16 23 RFBC ROFSC 24 REFC 25 RIND RCOMD 15 RINC RCOMC 13 28 26 GND GND GND 53 9 REFADJA GND S0 37 33 IOUT2D 11 S1 V+ 5V + U5B LT1469CS8 C V+ - 3 VOSADJB 46 8 IOUT1D S2 GND 34 4 35 S1 M-SPAN REFADJB S2 S0 JP4 REFADJD 1 EXT. 2 3 32 REFADJC JP3 REFADJC 1 EXT. 2 3 GND M-SPAN IOUT2C VOSADJC LDAC REFADJD REFADJC SRO 36 2 C18 27pF IOUT1C 14 E16 REFADJC JP2 REFADJB 1 EXT. 2 3 GND 38 SCK 1 REFADJB VOSADJB Exposed Pad, Solder Side 8 E13 REFADJB IOUT2B SDI REFADJA REFADJA IOUT1B CS 6 27 REFADJA JP1 REFADJA 1 EXT. 2 3 GND 40 E10 45 4 5 OUTA E7 C17 27pF 8 E8 LDAC 1 V+ E5 4 RFLAG + - U2B LT1469CS8 V- CLR 5 7 51 C12 0.1uF 50V 43 C11 0.1uF 50V RINB 2 E3 AMP V- C10 0.1uF 50V 1 D2 BAT54C C9 0.1uF 50V 2 ROFSB C8 10uF 16V - RCOMB A V+ C14 150pF 6 44 C5 0.1uF 50V REFA C4 0.1uF 50V RFBB C3 0.1uF 50V 1 2 C2 0.1uF 50V E2 GND D 8 NOTES: C1 10uF 16V D1 BAT54C B 5 3 AMP V+ 3 V+ 5 6 Title 7 www.linear.com LTC2754AIUKG-16, Size Document Number Date: Thursday, June 04, 2009 16-Bit Quad Serial Precision SoftSpan Iout DAC Rev. A Demo Circuit 1546A Sheet 8 1 of 1