5 4 3 2 1 EXT CLK D DIN CS/LD TP1 TP2 GND TP3 +5V TP4 GND TP5 +5V VSLV TP6 D TP7 VSLV J1 SEE TABLE V+PGA 1 3 INT_DIN 4 6 INT_CS/LD 7 9 GND TP8 OUTA 8 5 2 V+ INT_CLK C1 22uF 10V X5R GND R2 51k R3 51k TP11 C3 22uF 10V X5R VC V-PGA TP13 J6 INA 1 2 Single 4 3 Dual C2 0.1uF X5R U1 NC7NZ17K8X 1 R4 51k TP10 V+PGA 2 3 4 Vcc 8 3Y 1Y 7 2A 3A 6 GND 2Y 5 1A GND TP12 +5V MUX'D PGA 1 2X2 TP15 J2 SEE TABLE 3 4 6 7 9 GND INT_SHDN TP18 B GND 1 A1 2 GND 3 A2 Y1 6 VCC 5 Y2 4 C6 0.1uF X5R TP19 NC NC 16 2 INA OUTA 15 V- 14 OUTB 13 3 AGND 4 INB 5 SHDN V+ 12 6 CS/SD NC 11 7 DIN DGND 10 8 CLK DOUT 9 C5 0.1uF X5R V+PGA R1 604 C15 1uF X5R C17 MBR0520 2 V+PGA U3 NC7WZ17P6X 1 C D1 LED LN1351C-TR C16 MBR0520 DAISY CHAIN OUTPUT C7 0.1uF X5R 1 TP17 V-PGA 2 INB U2 LTC6912** 1 C4 1uF X5R R5 604 DUAL PGA 5 8 AGND TP16 OUTB TP14 2 TP9 J3 MOLEX 1 3 5 7 9 11 13 2 4 6 8 10 12 14 B MUXOUT MUXMODE ** ASSEMBLY DCHAIN U2 DC861A-A LTC6912CGN-1 DC861A-B LTC6912CGN-2 Note: LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY A J1, SERIAL CONTROL JUMPER DEFAULT POSITION LOCAL CONTROL OPTIONAL POSITION EXTERNAL SERIAL CONTROL THRU. TURRETS MUX'D PGA SHORTED PINS: 1 and 2 SHORTED PINS: 2 and 3 SHORTED PINS: 1 and 4 4 and 7 SHORTED PINS: 5 and 6 SHORTED PINS: 2 and 5 5 and 8 SHORTED PINS: 7 and 8 SHORTED PINS: 8 and 9 SHORTED PINS: 3 and 6 6 and 9 4 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. DUAL PGA SHORTED PINS: 4 and 5 5 Customer Notice J2, PGA OUTPUT CONTROL JUMPER 3 2 LINEAR TECHNOLOGY CORPORATION 1630 McCARTHY BLVD. MILPITAS, CA. 95035 408-432-1900 408-434-0507 FAX Title Dual Programmable PGA Size Document Number Date: Thursday, December 08, 2005 DEMO 861A Rev LTC6912CGN-1, -2 Sheet 1 1 of 2 A 5 4 3 2 1 U8 NC7WZ17P6X 1 3 5 7 9 11 13 2 4 6 8 10 12 14 8 3Y 1Y 7 1 2A 3A 6 2 NIC1 2Y 5 3 COM3 3 4 GND COM1 14 8 MOLEX MUXOUT NO1 16 IN1 15 NIC2 NC3 4 COM2 NO2 9 IN2 10 NC4 5 7 NIC3 6 COM4 12 NIC4 INT_CS/LD U5 PI5A383A INT_DIN D R6 604 R7 604 R8 604 R9 604 R11 604 R14 604 R16 604 MUXMODE INT_CLK R13 604 VSLV U6 DAISY CHAIN MASTER Y1 4MHZ MURATA CSTCR4M00G53-R0 1 D4 LED LN1351C-TR 2 R17 10k 9 10 3 1 AGND SHDN PGA SW3 SS12SDP4 OSC1/CLKIN OSC2/CLKOUT 18 17 16 15 14 13 12 11 RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0/INT 28 27 26 25 24 23 22 21 MCLR/VPP 2 COM ENBL 3 8 L1 10uH LQH32CN100K24 VIN 3 D5 MBR0520 2 SHDN FB C12 10uF 6.3V X5R VSS 3 7 4 8 5 C AGB DP DIGIT 2 9 6 Q1 MMBT3904 1 R21 3.24k R22 3.24k R23 3.24k R24 3.24k Q2 MMBT3904 +5V 2 4 6 HD2X3 3 3 7 4 8 C AGB DIGIT 2 9 6 Q3 MMBT3904 1 1 Q4 MMBT3904 1 B +5V J5 1 3 5 2 1 10 D E F DIGIT 1 LED2 LTD-2701G R26 3.24k R27 82.5k R28 909k R29 232k R30 100k R31 42.2k R32 11.0k SW4 SW5 SW6 SW7 SW8 SEND STORE UP DOWN SELECT R33 100k 2 U7 LT1930ES5 R20 100k +5V R25 243K GND 4 1 L2 10uH LQH32CN100K24 1 D-OFF C13 2.2uF 10V X5R C11 1uF X5R SW 2 5 On D-ON V+PGA 1 D E F DIGIT 1 LED1 LTD-2701G 7 6 5 4 3 2 RA5/AN4/SS RA4/T0CKI RA3/AN3/VREF+ RA2/AN2 RA1/AN1 RA0/AN0 2 1 10 DP 19 VSS B SW1 SS12SDP2 C 5 RC7/RX/DT RC6/TX/CK RC5/SDO RC4/SDI/SDA RC3/SCK/SCL RC2/CCP1 RC1/T1OSI/CCP2 RC0/T1OSO/T1CKI R19 604 +5V 1 On DGND R18 100k R15 1k PIC16F873A-I/SS VDD 3 VSLV C10 0.1uF X5R +5V D3 BAV74LT1 3 4 5 COM 6 OFF R12 100k +5V 20 C 1 2 COM 3 On ON D2 LED LN1351C-TR +5V 2 SW2 SS22SDP2 1 DCHAIN INT_SHDN 3 J4 D Vcc 1A 2 2 1 3 DAISY CHAIN INPUT C8 0.1uF X5R 2 4 +5V C9 0.1uF X5R U4 NC7NZ17K8X 3 Y2 C14 0.1uF X5R 2 5 2 A2 6 11 3 Y1 VCC VCC GND GND A1 2 13 1 LINEAR TECHNOLOGY CORPORATION A 1630 McCARTHY BLVD. MILPITAS, CA. 95035 408-432-1900 408-434-0507 FAX Title 5 4 3 2 Dual Programmable PGA Size Document Number Date: Thursday, December 08, 2005 DEMO 861A Rev LTC6912CGN-1, -2 Sheet 1 2 of 2 A