Texas Instruments ADS8402 EVM, ADS8412 EVM Power Supply Requirements, Power Supply Test Points

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Chapter 4

Power Supply Requirements

The EVM accepts four power supplies.

-A dual ±Vs dc supply for the dual supply op-amps. Recommend ±7 Vdc supply.

-A single +5-Vdc supply for the analog section of the board (A/D + Reference).

-A single +5-V or +3.3-Vdc supply for the digital section of the board (A/D + address decoder + buffers).

There are two ways to provide these voltages.

1) Wire in the voltages at test points on the EVM. See Table 4- 1.

Table 4- 1. Power Supply Test Points

Test Point

Signal

 

Description

 

 

 

TP14

+BVDD

Apply +3.3 V or +5 V. See ADC data sheet for full range.

 

 

 

 

TP11

+AVCC

Apply +5

Vdc.

 

 

 

 

TP12

+VA

Apply +7

Vdc. Positive supply for amplifier.

 

 

 

TP13

-VA

Apply –7 Vdc. Negative supply for amplifier.

2)Use the power connector J1 and derive the voltages elsewhere. The pinout for this connector is shown in Table 4- 2. If using this connector, set the W1 jumper to connect +3.3VD or +5VD from connector to +BVDD. Short between pins 1- 2 to select +5VD or short between pins 2- 3 to select +3.3VD as the source for the digital buffer voltage supply (+BVDD).

Table 4- 2. Power Connector, J1, Pinout

Signal

Power Connector - J1

Signal

 

 

 

 

+VA(+7V)

1

2

–VA (–7V)

 

 

 

 

+5VA

3

4

N/C

 

 

 

 

DGND

5

6

AGND

 

 

 

 

N/C

7

8

N/C

 

 

 

 

+3.3VD

9

10

+5VD

4-1

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Contents User’s Guide Products Applications Important NoticeEVM Important Notice EVM Warnings and Restrictions Read This First Data Sheets Literature NumberFCC Warning Contents Tables FiguresEVM Overview Features IntroductionIntroduction FeaturesAnalog Interface Signal Conditioning ReferenceDescription Signal Name Connector.Pin# Signal ConditioningAnalog Input Connector Reference Solder Short Jumper SettingReference Description Jumper Setting Designator Page Digital Interface Pinout for Parallel Control Connector P2Connector.Pin Signal Description Data Bus Connector P3 Jumper Settings for Decoder OutputsPinout for Converter Control Connector J3 Reference Designator Description Jumper SettingsPower Supply Test Points Power Supply RequirementsPower Connector, J1, Pinout Test Point Signal DescriptionPage Using the EVM As a Software Test Platform As a Reference BoardAs a Prototype Board ADS8402/ADS8412EVM BOM, Layout, and Schematic ADS8402/ADS8412EVM Bill Of Materials ADS9393EVM Bill of MaterialsADS8402/ADS8412EVM BOM, Layout, and Schematic Top Layer-Layer ADS8402/ADS8412EVM LayoutGround Plane-Layer Power Plane-Layer Bottom Layer-Layer ADS8402/ADS8412EVM Schematic +IN SJP4 TP6 +5VCC

ADS8402 EVM, ADS8412 EVM, ADS8402 specifications

Texas Instruments is renowned for its innovative semiconductor solutions, and the ADS8402 and ADS8412 analog-to-digital converters (ADCs) showcase the company's commitment to precision in data acquisition applications. The ADS8402 is a 16-bit, 2-channel ADC renowned for its high performance and versatility. It operates at data rates up to 1 MSPS (Mega Samples Per Second), making it ideal for a range of applications including industrial automation, high-speed data acquisition systems, and medical instrumentation.

The ADS8402 boasts a differential input architecture that enhances noise immunity and improves measurement accuracy. With features such as integrated voltage reference and a programmable gain amplifier, the device allows for adaptability in handling various signal levels. Its low power consumption further extends its appeal for portable and battery-operated devices. The device comes equipped with an internal clock generator, simplifying system design by reducing external components.

For developers looking to evaluate the performance of the ADS8402, the ADS8402 EVM (Evaluation Module) provides a robust platform. The EVM includes the necessary hardware for quick and convenient testing of the device's capabilities. It features numerous connectivity options, enabling users to interface with a variety of microcontrollers and processors. Benefiting from TI's extensive software support, the EVM allows for easy data visualization and manipulation through compatible software platforms.

On the other hand, the ADS8412 is an advanced 16-bit ADC with a single channel and supports faster sampling rates up to 2 MSPS. It is designed for applications requiring high precision and high throughput. The device features an integrated digital filter that significantly lowers noise and enhances signal integrity. The ADS8412 is particularly well-suited for precision measurement systems in industries such as telecommunications and data acquisition.

The ADS8412 EVM caters to users who wish to explore the capabilities of the ADS8412 with ease. Similar to the ADS8402 EVM, the ADS8412 evaluation module provides structured support for testing with readily available interfaces. This makes it an invaluable tool for engineers and developers looking to integrate high-performance ADCs into their designs.

Both the ADS8402 and ADS8412 ADCs exemplify Texas Instruments' dedication to delivering high-quality, innovative technologies that meet the demands of modern applications. With their combination of precision, speed, and adaptability, these ADCs are excellent choices for engineers seeking reliable data acquisition solutions.
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