5 4 3 2 1 REVISION HISTORY 9V-10V R3 2 33 U8 NC7SZ04P5X C11 CLK 3 0.1uF U2 NC7SVU04P5X 4 GND VIN GND SHDN VOUT 8 4 7 GND C44 1uF C59 1uF E3 C20 47uF 6.3V 0805 C7 0.1uF 1 C47 OPT C66 OPT SEN GND GND GND 5 BYP 2 C64 1uF R57 OPT R48 1.0K 1. ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603. 2. INSTALL SHUNTS AS SHOWN. 7 8 REF REF 15 2 SCK CHAIN 37 DB1 35 DB2 33 DB3 31 DB4 29 DB5 27 DB6 25 DB7 23 DB8 21 DB9 19 BUSY RDL/SDI 9 13 DB10 17 14 11 12 C15 0.1uF B 2 A SCK OE 1 4 4 SDO 1K GND BUSY RD 15 DB11 0.1uF R17 2K 3 BUSY C16 R13 2 DB12 13 DB13 11 9 DB14 U9 RD 7 DB15 NC7SZ04P5X 5 3 CLKOUT 1 39 40 37 38 35 36 33 34 31 32 29 30 27 28 25 26 23 24 21 22 19 20 17 18 15 16 13 14 11 12 9 10 7 8 5 6 3 4 1 2 40 38 36 34 32 30 C 28 26 24 22 20 18 16 14 12 10 8 6 4 2 B J3 9V-10V EXT_CM VREF SDO SDO C46 1uF 1 2 3 4 SCK 5 6 CNV 7 8 9 10 11 12 13 14 SCK C14 0.1uF CNV OPT U1 LTC2370CMS-16 MSPS BIT R44 R32 2 16 OPT 5.1 -B LTC2368CMS-16 1 16 OPT 5.1 -C LTC2367CMS-16 0.5 16 OPT 10 -D LTC2364CMS-16 0.25 16 OPT 10 -E LTC2369CMS-18 1.6 18 300 5.1 -F LTC2368CMS-18 1 18 300 5.1 -G LTC2367CMS-18 0.5 18 300 10 -H 5 +3.3V R7 1K * -A NOTE: UNLESS OTHERWISE SPECIFIED 5 DC590_DETECT 3 R56 ASSY A C40 OPT 1206 OPT VREF/2 EXT C8 1uF 3 6 7 SHDN 0402 OPT E4 R47 1.05K 1 4 IN5 39 DB0 U7 24LC024-I/ST SCL SDA WP A2 A1 A0 R10 4.99K R11 4.99K R12 4.99K 6 5 7 3 2 1 WP 2 PROG JP4 3 IN CNV SDO R19 0 DB16 C49 OPT U5 LT1763CS8 C41 0.1uF IN+ DB17 R58 0 R41 OPT OUT 4 0.1uF U6 NC7SZ66P5X CNV 0402 R55 1 8 R45 0 R35 OPT JP2 CM 9V-10V C65 OPT 0805 R38 CNVST_33 DB16 J2 CON-EDGE40-100 +3.3V 1 C58 OPT V- C61 10uF 6.3V U4 NC7SVU04P5X VREF 3 10uF 6.3V * 1 2 1 0 - R40 OPT C48 R39 BNC + 4 5 8 J8 C42 15pF 3 2 B AIN0 - VREF R9 OPT C63 10uF 6.3V JP5 COUPLING AC DC 1 R15 OPT OVDD C18 10uF OPT 6.3V 3 * 3 6 10 16 0 0 2 BNC R33 2 R14 3 VCC U1 D 0.1uF 4 R8 33 C13 0.8VREF GND GND GND GND U15 LTC6202CS5 (TSOT-6) R32 5 6 C17 C39 0.01uF 50V C0G 1206 R16 0 C4 33 Q C56 0.1uF JP6 FS 2 C10 0.1uF VDD OPT V+ 2 AIN+ 0 - VREF J4 C9 10uF 6.3V R59 OPT R31 3 7 PR Q VREF C60 0.1uF JP1 COUPLING AC DC 1 R4 DATE 5-26-11 DB17 +2.5V C 8 VCC CLR 0.1uF VREF C6 10uF 6.3V 0.1uF D R46 0 1uF C57 C43 0.1uF GND 6 5 GND GND (LTC6652AHMS8-5) +3.3V V- +3.3V CP 5 6 V+ C55 OUTS GND GND LTC6655BHMS8-5 4 GUY H. +3.3V C3 2 5 4 OPT DNC 6 1 3 2 3 OUTF +3.3V U3 NL17SZ74 7 VCC R6 1.00K 4 3 R5 49.9 1206 U10 1 5 5 2 BNC C2 0.1uF VIN 33 8 GND VSS J1 CLK IN 100MHz MAX 3.3VPP SHDN 2 C1 0.1uF R2 1.00K C5 0.1uF 1 +3.3V 3 D +3.3V APPROVED PRODUCTION 4 +3.3V DESCRIPTION 2 5 R1 U20 REV __ 3 ECO LTC2364CMS-18 4 0.25 18 300 10 DC590 87331-1420 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 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. 3 APPROVALS PCB DES. APP ENG. TECHNOLOGY JW GUY H. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC LOW POWER, LOW NOISE ADC SIZE N/A SCALE = NONE 2 DATE: IC NO. LTC23XXCMS FAMILY DEMO CIRCUIT 1813A 05-26-11 SHEET 1 1 REV. 2 OF 2 A 3 2 U12 LT1763CS8-1.8 9V-10V IO4 IO5 IO6 IO7 IO8 IO15 IO16 IO17 IO18 IO19 IO20 IO21 3 4 DB11 IO26 DB12 IO27 DB13 IO28 DB14 5 6 IO29 DB15 IO30 CLKOUT IO33 7 IO34 8 IO35 15 CNVST_33 IO36 16 IO37 17 IO38 18 IO39 19 IO40 20 IO41 21 IO42 IO47 EPM240GT100C5N IO48 C IO49 IO50 DC590_DETECT IO51 27 34 35 36 37 IO57 RD IO58 BUSY IO61 SCK IO66 38 42 48 49 IO90 70 71 72 73 74 IO74 75 IO75 R44 EPM240GT100C5N IO89 69 IO73 50 IO88 68 IO72 R30 10K 0402 IO87 67 IO71 47 IO86 66 IO70 +3.3V IO85 61 IO69 41 IO84 58 IO68 40 IO83 57 IO67 39 IO82 56 IO56 SCK IO81 55 IO55 SDO IO78 54 IO54 30 IO77 53 IO53 29 IO76 52 IO52 28 33 51 IO91 DB16 IO92 DB17 IO95 DB0 IO96 DB1 IO97 DB2 IO98 IO99 EPM240GT100C5N * IO100 0402 76 77 78 E6 DB3 C21 22uF 16V 1210 GND DB4 E7 DB5 IN 5 83 SHDN 4 BYP D +3.3V U13 LT1763CS8 9V-10V DB6 85 8 87 88 5 1 OUT IN 2 SEN C25 1uF 16V 86 SHDN 4 BYP 2 DB9 8 DB10 E9 2 SEN C28 1uF 16V C 1 OUT IN 98 99 +2.5V U14 LT1763CS8-2.5 9V-10V 97 100 R26 1.54K R27 2.80K 1% DB8 95 96 5 SHDN 4 3 6 7 BYP +2.5V C29 10uF 6.3V C30 0.01uF EPM240GT100C5N +3.3V C26 10uF 6.3V C27 0.01uF JP3 +3.3V VCCIO 91 E8 R25 1.69K +2.5V DB7 90 92 C24 10uF 6.3V C23 0.01uF 82 89 +1.8V E5 2 SEN C22 1uF 16V 81 84 +1.8V 1 OUT 1 IO3 D 2 8 9V - 10V 3 IO2 26 U11D 3 6 7 IO1 1 U11C GND GND GND U11B 3 6 7 U11A 1 GND GND GND 4 GND GND GND 5 U11E 1K 0402 64 10 9 43 8 7 6 5 22 4 3 23 1 24 DEV_OE 44 DEV_CLRN B 2 25 JTAG GCLK1 GCLK3 DEV_OE 13 63 9 31 45 59 80 94 C33 0.1uF 0402 C34 0.1uF 0402 C35 0.1uF 0402 C36 0.1uF 0402 C37 0.1uF 0402 C38 0.1uF 0402 TCK 4 4 BYP C52 10uF 6.3V 5V 2 R43 1.0K V+ 8V JP8 V+ B U17 LT1964ES5-SD TDO 2 -9V / -10V VCCINT VCCINT VCCIO1 VCCIO1 VCCIO1 VCCIO2 VCCIO2 VCCIO2 3 C54 1uF 16V GND GND GND GND GND GND GND GND 10 11 32 46 60 93 65 79 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 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. 5 SHDN R42 5.62K C50 0.01uF E10 R54 6.49K TDI EPM240GT100C5N A 2 SEN TMS U11F +1.8V C32 0.1uF 0402 5 DEV_CLRN E11 +3.3V OUT IN C51 1uF 16V EPM240GT100C5N R24 1K C31 0.1uF 0402 8 GCLK2 1 1 R23 62 V+ U16 LT1763CS8 9V-10V GCLK0 3 1K 0402 14 3 1 IN OUT SHDN GND ADJ 5 R28 2.0K 4 R29 1.0K APPROVALS PCB DES. APP ENG. TECHNOLOGY JW GUY H. V- 1 J5 R22 12 -3.6V 2 V- GND E12 JP7 V- C53 10uF 6.3V 3 R21 10K CLK 1K 0402 GND GND GND +3.3V R20 3 6 7 +3.3V 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC LOW POWER, LOW NOISE ADC SIZE N/A SCALE = NONE 2 DATE: IC NO. LTC23XXCMS FAMILY DEMO CIRCUIT 1813A 05-26-11 SHEET 2 1 REV. 2 OF 2 A