+5VA

-5VA

+5VD

+3.3V

+1.8V

+10V

-10V

PWR&VREF

USB

USB

RESET

DAC1220

TUSB3410

MSP430F449

+1

-1

DAC

IN

OUT

Analog

Daughtercard

Modular

Connectors

Power

Powerfrom

PWR&VREFBlock

Serial

Joystick

RESET

OPER

LCDDISPLAY

BSL

2.5V

Suppliedto

Daughtercard

PowerConnector

ADS1248EVM-PDK Kit Operation

www.ti.com

Figure 8. MMB3 Block Diagram

The MMB3 was designed to be used as a stand-alone demonstration platform for low-speed data

converters. It features an onboard, 20-bit digital-to-analog converter (DAC) that can be used as a signal

source for an ADC under test, and has a joystick for control of functions on the board when it is not

controlled by a PC. These features are experimental and not supported in the ADS1248EVM-PDK at

this time.

The MMB3 derives power from the USB interface, and generates +5VD, 3.3V, and 1.8V, as well as +5VA

and

–5VA and ±10V. The ±10V is supplied to the daughtercard power connector as +VA and –VA.

The MMB3 is not sold as a microcontroller development board, and it is not available separately. TI cannot

offer support for the MMB3 except as part of an EVM kit. For schematics or other information about the

MMB3, contact Texas Instruments.

8.3

EVM Power Supply

The ADS1248EVM-PDK is powered completely from the USB connection on the MMB3. The MMB3

provides 3.3V and

±5V to the ADS1248EVM.

8.4

Running the Software and Download of Firmware to MMB3

NOTE:

The software is continually under development. These instructions and screen images are

current at the time of this writing, but may not exactly match future releases.

The program for evaluating the ADS1248EVM-PDK is called ADCPro. This program uses plug-ins to

communicate with the EVM. The ADS1248EVM-PDK plug-in is included in the ADS1248EVM-PDK

package.

12

ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK

SBAU142B

– April 2009 – Revised May 2011

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