DEMO MANUAL DC200 HIGH SPEED ADC LTC1416 (400ksps) and LTC1419 (800ksps) 14-Bit A/D Converter Demo Board U DESCRIPTIO The LTC 1416/LTC1419 are, respectively, 2s, 400ksps matic, parts list, drawings and dimensions of all the PC and 1s, 800 ksps sampling A/D converters. The LTC1416 board layers are included. An explanation of the layout and draws 70mW and the LTC1419 draws 150mW. The bypass strategies used in this board is also included, so LTC1416/LTC1419 demo board provides the user with a that anyone designing a PC board using the LTC1416/ way to evaluate the LTC1416 and LTC1419 high speed LTC1419 will be able to get the maximum performance A/D converters. In addition, the LTC1416/LTC1419 demo from the device. The LTC1416/LTC1419 are intended for board is intended to illustrate the layout and bypassing applications in telecommunications, digital signal pro- techniques required to obtain optimum performance from cessing, imaging, or any high speed, high resolution data these parts. The LTC1416/LTC1419 demo board is de- acquisition application. Gerber files for this circuit board signed to be easy to use and requires only 7V to 15V are available. Call the LTC factory. supplies, a conversion-start signal and an analog input Some key features of this demo board include: signal (single-ended or differential). As shown in the Proven 400ksps (LTC1416) and 800ksps (LTC1419) Board Photo, the LTC1416/LTC1419 are very space effi- 14-bit ADC surface mount layout cient solutions for A/D users. By combining a 14-bit A/D, 2 Actual ADC footprint is only 0.5 inch including sample-and-hold and reference into a single SSOP pack- bypass capacitors age, all the data acquisition circuitry, including the bypass 2 80dB SINAD and 90dB THD at 200kHz (LTC1416) and capacitors, can be placed in an area of only 0.5 inch . 80dB SINAD and 86dB THD at 400kHz (LTC1419) This manual describes how to use the demo board. inputs Included are timing diagrams, power supply requirements , LTC and LT are registered trademarks of Linear Technology Corporation. and analog input range information. Additionally, a sche- WUU TYPICAL PERFOR A CE CHARACTERISTICS A D BOARD PHOTO 4096 Point FFT of LTC1419 Demo Board Component Side 0 10 20 30 40 50 60 70 80 90 100 110 0 100 200 300 400 500 600 FREQUENCY (kHz) DC200 TA01 DC200 BdPhoto 1 MAGNITUDE (dB)+ DEMO MANUAL DC200 HIGH SPEED ADC U W W PACKAGE AND SCHEMATIC DIAGRAMS 2 LTC1416/LTC1419 Demonstration Board Features Analog Input Signal Buffer, 400ksps/800ksps, Parallel Data Output 14-bit ADC, Data Latches and LED Binary Data Display. Latched Conversion Data is Available on the 18-Pin Header, J6 TOP VIEW + A 1 28 +AV IN DD A 2 27 DV IN DD V 3 26 V REF SS J1 J3 V V V V REFCOMP 4 25 BUSY CC CC LOGIC U1 SS 7V TO R14 U2 LT1121-5 7V TO 79L05 5 24 15V AGND CS 20 21 15V 1 3 +V V IN V V IN OUT IN OUT IN 6 23 CONVST B13 GND D 00:13 C12 C14 B12 7 22 RD LTC1416CG GND TABGND 5 C1 R0 1.2k 0.1F 0.1F + C10 C2 D14 D00 + LTC1419CG D0 B11 8 21 SHDN D15 22F 24 D00 10F 22F SS12 SS12 10V B10 9 20 B0 R1 10V D01 D1 10V D01 B9 10 19 B1 R2 D02 D2 B8 11 18 B2 D02 R3 12 17 B7 B3 D03 D3 D03 13 16 B4 J2 B6 R4 C4 D04 D4 V GND CC DGND 14 15 B5 D04 0.1F R5 D05 D5 G PACKAGE D05 AGND DGND 28-LEAD PLASTIC SSOP R6 JP3 V D06 D6 OUT D06 R7 R15 D07 D7 U3 J4 JP2 D07 U5 51 V+ LT 1363 7 R8 + 74HC574 D08 D8 A 2 D08 6 1 R17 3 0E R9 D09 D9 + 8 11 10k B 00:13 D09 1 4 R10 V 2 19 B00 D00 D10 D10 C11 Q0 D10 D0 1000pF 3 B01 18 D01 R11 R18 D11 D11 D1 Q1 JP4 R16 U4 D11 C3 B02 4 17 D02 10k V SS 51 D2 Q2 R12 LTC1419/LTC1416 0.1F D12 D12 B03 5 16 D03 A D12 1 6 B13 + D3 Q3 A D13 R13 IN B04 6 15 D04 J5 D13 D13 2 7 B12 D4 Q4 D13 A D12 IN 7 14 B05 D05 3 8 B11 Q5 D5 V D11 LED REF 8 13 B13 D13 9 B10 4 D00 D6 Q6 C8 C13 D10 D00 REFCOMP J6-13 9 12 JP1 1F 25 10 B09 22F D7 Q7 D01 D9 BUSY D01 J6-14 10V 10V 24 11 B08 D02 D8 U6 CS J6-11 D02 23 12 B07 74HC574 D7 CONVST D03 1 J6-12 D03 22 13 B06 0E D6 RD D04 11 U7A U7B J6-9 D04 J7 21 15 B05 1 4 SHDN D5 23 D05 B12 19 D12 2 CLK 28 16 B04 D05 J6-10 D0 Q0 AV D4 DD D06 B11 3 18 D11 27 17 B03 R19 D06 HC14 HC14 J6-7 D1 Q1 DV D3 DD 51 B10 4 17 D10 D07 26 18 B02 D07 D2 Q2 J6-8 V D2 SS B09 5 16 D09 19 B01 D08 5 D3 Q3 V V D1 J6-5 D08 CC SS AGND B08 6 15 D08 14 20 B00 D09 D4 Q4 V D0 LOGIC DGND J6-6 D09 B07 7 14 D07 D5 Q5 D13 D10 C9 C5 J6-3 D10 B06 8 13 D06 JP5C CS D6 Q6 10F 10F D11 U7E D11 J6-4 9 12 10V 10V 11 10 JP5B RD D7 Q7 D12 D12 J6-1 JP5A SHDN DATA READY D13 HC14 D13 J6-2 D13 V LOGIC R21 D13 R20 J6-15 U7C U7D 1k 56 98 1M RDY J6-16 RDY 14 DGND HC14 HC14 J6-17 U7F V CC C16 DGND C15 U7G 13 12 J6-18 15pF NOTES: UNLESS OTHERWISE SPECIFIED 0.1F HC14 1. ALL RESISTOR VALUES IN OHMS, 1/10W, 5% HC14 HEADER GND 2. ALL CAPACITOR VALUES IN F, 25V, 20% AND IN pF, 50V, 10% 18-PIN 7 3. THIS DEMO CIRCUIT IS AVAILABLE IN A LOW POWER VERSION LTC1416, DEMO NUMBER DC200A-L DM124 SCHEM