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PGA309EVM-USB Hardware Setup

Table 5 describes the function of the jumpers in the Miscellaneous connections section of the PGA309 Test Board.

Table 5. PGA309_Test_Board Jumper Functions: Miscellaneous Connections

Jumper

Default

Purpose

 

 

 

JMP1, JMP2

NC

For JMP1 = NC, JMP2 = VREF EXT: The REF pin on the

 

 

PGA309 is configured for internal reference. In this mode, JMP2

 

 

is not connected, so its position does not matter.

 

 

 

 

VREF EXT

For JMP1 = VREF , JMP2 = VS: The REF pin is configured for

 

 

external reference and is connected to VS.

 

 

For JMP1 = VREF, and JMP2 = VREF EXT: The REF pin is

 

 

configured for external reference and is connected to T2

 

 

(terminal for external reference connection).

 

 

 

JMP3

ADS1

For JMP3 = ADS1, it connects the analog-to-digital converter

 

 

(ADC) on the USB-DAQ-Platform to the output of the PGA309.

 

 

The ADC on the USB-DAQ-Platform allows full measurement

 

 

and calibration of the PGA309 without any additional

 

 

instruments.

 

 

 

 

 

For JMP3 = NC, the ADC on the USB-DAQ-Platform is not

 

 

connected to the PGA309. This mode is useful if you want to

 

 

use an external DMM in place of the USB-DAQ ADC.

 

 

 

JMP7, JMP8

NC

For JMP7 = NC, and JMP8 = One to PRG: In this mode, the

 

 

one-wire signal from the USB-DAQ-Platform is connected

 

 

directly to the PRG pin on the PGA309. This mode is commonly

 

 

called Four-wire mode because only four connections are

 

 

required (Power, GND, VOUT, and PRG).

 

One to PRG

For JMP7 = VOUT to PRG, and JMP8 = One to VOUT: In this

 

 

mode, the one-wire signal from the USB-DAQ-Platform is

 

 

connected to the VOUT/PRG pin on the PGA309. This mode is

 

 

commonly called Three-wire mode because only three

 

 

connections are required (Power, GND, and VOUT/PRG).

Table 6 explains the function of the jumpers in the sensor emulator section connections section of the PGA309 Test Board.

Table 6. PGA309_Test_Board Jumper Functions: Sensor Emulator Section

Jumper

Default

Purpose

 

 

 

JMP12

VEXC

This jumper selects VS or VEXC as the reference for the sensor

 

 

emulator. Using VS as the reference is commonly called

 

 

ratiometric mode.

 

 

 

JMP17, JMP4, JMP5, JMP6

Emulate

These jumpers select the sensor emulator when in the Emulate

 

 

position. When the jumper is in the EXT position, it selects the

 

 

external sensor.

 

 

 

JMP14, JMP15

10mV

These jumpers select the range of the sensor emulator.

 

 

 

 

 

This jumper is used for the sensor emulator only; its position is

 

 

not important for externally-connected, real-world sensors.

 

 

 

 

 

10m = maximum emulator output is 10mV/V.

 

 

 

 

 

100m = maximum emulator output is 100mV/V.

 

 

 

JMP13, JMP16

RT–, Diode

This jumper selects the type of temperature sensor you will

 

 

emulate on the EVM. This jumper is used for the sensor

 

 

emulator only; its position is not important for

 

 

externally-connected, real-world sensors.

 

 

 

 

 

JMP13 = Diode, JMP16 = RT-. In this position, the temperature

 

 

sensor emulation is set for diode type temperature sensor.

 

 

When JMP13 = Diode, the position of JMP16 does not matter.

 

 

 

 

 

JMP13 = RT, JMP16 = RT-. In this position, the temperature

 

 

sensor emulation is set for RT–.

 

 

 

 

 

JMP13 = RT, JMP16 = RT+. In this position, the temperature

 

 

sensor emulation is set for RT+.

 

 

 

SBOU084 –February 2010

PGA309EVM-USB 23

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Copyright © 2010, Texas Instruments Incorporated

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Texas Instruments PGA309EVM-USB manual PGA309TestBoard Jumper Functions Miscellaneous Connections

PGA309EVM-USB specifications

The Texas Instruments PGA309EVM-USB is an Evaluation Module designed specifically for the PGA309 Precision Analog Front End (AFE) family. This versatile and powerful device serves various applications in the realm of sensor signal conditioning, particularly for pressure sensors, temperature sensors, and other analog sensors requiring high precision.

One of the main features of the PGA309EVM-USB is its high-performance PGA309 device, which incorporates a programmable gain amplifier (PGA) allowing for flexible signal amplification. The PGA309 has a gain range from 1 to 128, enabling it to adapt to a wide array of sensor types and output levels. This flexibility is crucial for achieving optimal performance in diverse applications.

The module also leverages advanced analog and digital processing technologies, which enhance its capabilities. It integrates an onboard microcontroller, allowing users to easily configure settings, execute control algorithms, and manage data acquisition. The built-in USB interface simplifies the communication with a PC, making it straightforward to control the EVM through intuitive software provided by Texas Instruments.

Another significant characteristic of the PGA309EVM-USB is its highly accurate signal conditioning features, such as offset and gain calibration, which ensure minimized errors and improved measurement reliability. The device supports a variety of digital output configurations, including I2C and SPI, to allow easy integration into different system architectures.

In addition to its robust signal processing core, the PGA309EVM-USB is designed with user-friendly interfaces, making it suitable for both experienced engineers and those new to sensor design. The comprehensive software toolkit offers a graphical user interface (GUI) that enables real-time monitoring and adjustment of parameters, ensuring users can optimize their applications.

Furthermore, the device is designed for functionality in harsh environments, incorporating features to withstand temperature variations and electrical noise. This reliability adds value for applications in industrial automation, automotive systems, and medical devices.

In summary, the Texas Instruments PGA309EVM-USB stands out as a powerful tool for engineers looking to design and prototype high-precision sensor signal conditioning applications. With its programmable gain amplifier, advanced processing capabilities, and user-friendly interfaces, it represents a significant advancement in the field of analog signal processing, allowing for greater flexibility and accuracy in diverse applications.