Texas Instruments ADS8364EVM User Manual Download Page 1 | Manualshive

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Texas Instruments ADS8364EVM User Manual Download Page 1

ADS8364EVM

April 2002

Data Acquisition Products

User’s Guide

SLAU084

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Summary of Contents for ADS8364EVM

Page 1: ...ADS8364EVM April 2002 Data Acquisition Products User s Guide SLAU084...

Page 2: ...t that any license either express or implied is granted under any TI patent right copyright mask work right or other TI intellectual property right relating to any combination machine or process in wh...

Page 3: ...handling or use of the goods Please be aware that the products received may not be regulatory compliant or agency certified FCC UL CE etc Due to the open construction of the product it is the user s r...

Page 4: ...If there is uncertainty as to the load specification please contact a TI field representative During normal operation some circuit components may have case temperatures greater than 30 C The EVM is de...

Page 5: ...ntains the following chapters Chapter 1 EVM Overview Chapter 2 Analog Interface Chapter 3 Digital Interface Chapter 4 Power Supply Chapter 5 Initial Setup of the Board Chapter 6 EVM Schematic Informat...

Page 6: ...r website at www ti com Data Sheets Literature Number ADS8364 SBAS219 OPA2132 SBOS054 OPA2350 SBOS099 TPS2104 SLVS235 SN74CBT3257 SCDS017 FCC Warning This equipment is intended for use in a laboratory...

Page 7: ...gital 5 V Supplies 2 3 2 4 Output Buffer 3 3 V Supply 2 4 2 5 Reference Voltage 2 5 3 Digital Interface 3 1 3 1 Control Signals 3 2 3 2 Bus Width 3 2 3 3 External Clock 3 2 4 Power Supply 4 1 4 1 Anal...

Page 8: ...lection 2 4 2 3 ADS8364EVM Reference Circuit 2 5 4 1 Analog Front End Supply 4 2 4 2 ADC Power Supply Input 4 3 4 3 Digital Buffer Alternate Supply Input 4 4 Tables 2 1 Typical Analog Input Buffer Cir...

Page 9: ...ut voltage in the range of VREF to VREF centered on the internal 2 5 V reference The part also accepts bipolar input ranges when a level shift circuit is used in the analog front end circuitry see Fig...

Page 10: ...1 2...

Page 11: ...vel and impedance changes to the input signal The second part is the voltage reference circuit In addition to being the conversion reference the ADS8364 s reference output is used for level shifting t...

Page 12: ...t be taken to ensure the 15 VDC limit is not exceeded or potential damage to the op amp circuits can occur Figure 2 1 ADS8364EVM Schematic Analog Input Section _ 4 2 3 8 1 VIN VIN U1A TP9 R25 49 9 C56...

Page 13: ...be used to buffer the reference voltage to the input of A D converter Table 2 1 Typical Analog Input Buffer Circuit Values A0 Shown Input Voltage R14 R59 R1 R45 R2 R56 R13 R58 C7 C38 C1 C32 W2 W1 0 5...

Page 14: ...e 5 V digital source via V9 to the buffer circuit The digital buffer circuit of the ADS8364 can also be powered from an external source via J10 When operated in this fashion the shunt jumper at W18 sh...

Page 15: ...and TP22 as a means to connect an external source An external source should be applied to TP20 referenced to TP22 The voltage input range on this node is 1 5 VDC to 2 6 VDC This voltage is buffered t...

Page 16: ...2 6...

Page 17: ...ttom side of the EVM allow direct plug in to the DSK plat forms If an alternate control system is desired mating connector part numbers SFM 140 01 S D or SFM 140 02 S D can be used to wire the control...

Page 18: ...1 Address Map W17 CLOSED W17 OPEN A0 0xA000 0020 0xA002 0000 A1 0xA000 0024 0xA002 4000 B0 0xA000 0028 0xA002 8000 B1 0xA000 002C 0xA002 C000 C0 0xA000 0030 0xA003 0000 C1 0xA000 0034 0xA003 4000 Cycl...

Page 19: ...for all power supply inputs optimal performance of the EVM requires a clean well regulated power source The power and ground planes on the inner layers of the EVM are split into digital and analog sec...

Page 20: ...operation The circuits are designed to operate from a maximum supply voltage of 12 VDC Single supply operation can be achieved by applying a positive dc voltage to pin 1 of J7 marked as 12 V on EVM w...

Page 21: ...the PCB W14 can be used to determine the source of the input supply With W14 closed the 5 V ADC power supply source is located at J8 The TPS2104 power switch at U9 directs the voltage from J8 to the...

Page 22: ...d to the BVDD pins of the ADS8364 By moving the shunt jumper on W18 to pins 1 and 2 the user chooses the 5 V ADC supply as the source of the BVDD voltage J10 provides a means of supplying an alternati...

Page 23: ...ference of the ADC W13 pins 2 and 3 shorted Table 5 1 Factory Defaults Analog Input Buffers A0 Shown Refer to Figure 2 1 and Input Voltage R14 R59 R1 R45 R2 R56 R13 R58 C7 C38 C1 C32 W2 W1 Figure 2 1...

Page 24: ...5 2...

Page 25: ...6 1 EVM Schematic EVM Schematic The following pages contain the ADS8364EVM circuit diagram Chapter 6...

Page 26: ...U3B OPA2132 R64 4 99K R50 4 99K R65 R51 4 99K W7 C35 330pF C41 Vref TP6 1 2 3 J5 3 2 1 8 4 U4A OPA2132 Vin Vin R21 4 99K R9 4 99K R22 R10 4 99K W10 C5 330pF C11 Vref TP14 5 6 7 U4B OPA2132 R66 4 99K...

Page 27: ...3 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 J11 DC_D0 DC_D1 DC_D2 DC_D3 DC_D4 DC_D5 DC_D6 DC_D7 DC_D8 DC_D9 DC_D10 DC_D11 DC_D12 DC...

Page 28: ...1uF TP1 L1 15uH VIN DVdd C77 0 1uF TP21 L5 4 7uH AVdd C73 0 1uF TP7 L4 4 7uH DSP 5 GND 2 IN1 5 IN2 1 OUT 8 OUT 7 ENA 3 U9 TPS2104D 1 2 J10 C29 0 1uF W14 TP23 L6 4 7uH DSP 3 3 W18 BVdd R37 0 ohm R72 0...

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