Texas Instruments DAC8555EVM Скачать руководство пользователя страница 10 | Manualshive

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Texas Instruments DAC8555EVM Скачать руководство пользователя страница 10

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2.2

EVM Performance

PCB Design and Performance

Figure 8. DAC8555EVM—Drill Drawing

The EVM performance test is executed using a high-density DAC bench test board, an Agilent 3458A
digital multimeter and a PC running LabVIEW™ software. The EVM board is tested for linearity for all
codes between 485 and 64741. The DUT is then allowed to settle for 1ms before the meter is read. This
process is repeated for all codes to generate the measurements for INL and DNL.

Results of the DAC8555EVM tests are shown in

Figure 9

through

Figure 12

.

10

DAC8555EVM User's Guide

SLAU204 – December 2006

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Содержание DAC8555EVM

Страница 1: ...For a more detailed description of the DAC8555 see the product data sheet available from the Texas Instruments web site at http www ti com Additional support documents are listed in the section of th...

Страница 2: ...creen Image 9 8 DAC8555EVM Drill Drawing 10 9 INL and DNL Characterization Graph of DAC A 11 10 INL and DNL Characterization Graph of DAC B 12 11 INL and DNL Characterization Graph of DAC C 13 12 INL...

Страница 3: ...7 This configuration allows the DAC8555 analog section to operate from either supply power while the I O and digital section are powered by 5V VDD The VCC supply source is primarily used to provide th...

Страница 4: ...ing a custom cable Additionally there is also an MSP430 based platform HPA449 that uses the MSP430F449 microprocessor to which this EVM can connect and interface as well For more details or informatio...

Страница 5: ...P15 JMP16 JMP9 JMP10 DAC Out VSS V H REF TP4 TP3 VCC GND VSS GND VDD 5VA 3 3VA DIN LDAC SCLK SYNC JMP5 JMP6 JMP4 JMP3 JMP8 V H REF TP2 VSS VCC V L REF Output Buffer Module RST RSTSEL RSTSEL EN RST Ove...

Страница 6: ...ce the bypass capacitors as close as possible to the device pins and properly separate the analog and digital signals from each other In the layout process carefully consider the placement of the powe...

Страница 7: ...i com PCB Design and Performance Figure 2 DAC8555EVM PCB Top Silkscreen Image Figure 3 DAC8555EVM PCB Layer 1 Top Signal Layer SLAU204 December 2006 DAC8555EVM User s Guide 7 Submit Documentation Feed...

Страница 8: ...w ti com PCB Design and Performance Figure 4 DAC8555EVM PCB Layer 2 Ground Plane Figure 5 DAC8555EVM PCB Layer 3 Power Plane 8 DAC8555EVM User s Guide SLAU204 December 2006 Submit Documentation Feedba...

Страница 9: ...om PCB Design and Performance Figure 6 DAC8555EVM PCB Layer 4 Bottom Signal Layer Figure 7 DAC8555EVM PCB Bottom Silkscreen Image SLAU204 December 2006 DAC8555EVM User s Guide 9 Submit Documentation F...

Страница 10: ...nd a PC running LabVIEW software The EVM board is tested for linearity for all codes between 485 and 64741 The DUT is then allowed to settle for 1ms before the meter is read This process is repeated f...

Страница 11: ...www ti com PCB Design and Performance Figure 9 INL and DNL Characterization Graph of DAC A SLAU204 December 2006 DAC8555EVM User s Guide 11 Submit Documentation Feedback...

Страница 12: ...www ti com PCB Design and Performance Figure 10 INL and DNL Characterization Graph of DAC B 12 DAC8555EVM User s Guide SLAU204 December 2006 Submit Documentation Feedback...

Страница 13: ...www ti com PCB Design and Performance Figure 11 INL and DNL Characterization Graph of DAC C SLAU204 December 2006 DAC8555EVM User s Guide 13 Submit Documentation Feedback...

Страница 14: ...www ti com PCB Design and Performance Figure 12 INL and DNL Characterization Graph of DAC D DAC8555EVM User s Guide 14 SLAU204 December 2006 Submit Documentation Feedback...

Страница 15: ...2 C3 TDK C3216X7R1C106M Multilayer Ceramic Capacitor 10 F 1206 X7R Not 2 C8 C9 TDK Multilayer Ceramic Capacitor 1206 Installed 16 bit Quad Voltage Output Serial Input DAC 11 1 U1 Texas Instruments DAC...

Страница 16: ...ed to the noninverting input of the output op amp U2 JMP16 1 2 J4 5 is connected to the output of the op amp U2 The host processor drives the DAC Thus proper DAC operation depends on a successful conf...

Страница 17: ...al stability when stacking or plugging into any interface card In addition it provides easy access for monitoring up to eight DAC channels when stacking two EVMs together The DAC8555EVM includes an op...

Страница 18: ...om the gain resistor R9 There are two types of configurations that will yield an output gain of 2 depending on the setup of jumpers JMP5 and JMP6 These configurations allow the user to choose whether...

Страница 19: ...fering U4A while the other half is unused This unused op amp U4B is left for whatever op amp circuit application the user desires to implement The 1206 footprint for the resistors and capacitors surro...

Страница 20: ...ain of 2 5V analog supply is selected for AVDD JMP7 3 3V analog supply is selected for AVDD Routes the adjustable buffered onboard 5V reference to the VREFH input of the DAC8555 JMP8 Routes the user s...

Страница 21: ...VOUTB to J4 4 JMP12 Routes VOUTB to J4 12 Routes VOUTC to J4 6 JMP13 Routes VOUTC to J4 14 Routes VOUTD to J4 8 JMP14 Routes VOUTD to J4 16 Routes J4 1 to U2 noninverting input JMP15 Routes J4 3 to U...

Страница 22: ...www ti com 4 Schematic Schematic 22 DAC8555EVM User s Guide SLAU204 December 2006 Submit Documentation Feedback...

Страница 23: ...4 A2 6 A3 8 A4 10 A5 12 A6 14 A7 16 REF 18 REF 20 A0 1 A1 3 A2 5 A3 7 AGND 9 AGND 11 AGND 13 VCOM 15 AGND 17 AGND 19 J4A OUTPUT HEADER GPIO0 2 DGND 4 GPIO1 6 GPIO2 8 DGND 10 GPIO3 12 GPIO4 14 SCL 16 D...

Страница 24: ...uction of the product it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE NEITHER P...

Страница 25: ...iness practice TI is not responsible or liable for any such statements TI products are not authorized for use in safety critical applications such as life support where a failure of the TI product wou...

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