ADS1610IPAPR datasheet(21/29 Pages) TI2

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APPLICATION INFORMATION

INTERFACING THE ADS1610 TO THE

DOUT[15:0]

ADS1610

DRDY

D[15:0]

TMS320C5400

INT3

IOSTRB

R/W

A15

DOUT[15:0]

ADS1610

DRDY

XD[15:0]

TMS320C6000

EXT_INT7

CE2

ARE

INTERFACING THE ADS1610 TO THE

ADS1610

SBAS344C – AUGUST 2005 – REVISED OCTOBER 2006

In general, keep the resistances used in the driving

The ADS1610 uses TI PowerPAD™ technology. The

circuits for the inputs and reference low to prevent

PowerPAD is physically connected to the substrate

excess

thermal

noise

from

degrading

overall

of the silicon inside the package and must be

performance. Avoid having the ADS1610 digital

soldered to the analog ground plane on the PCB

outputs drive heavy loads. Buffers on the outputs are

using

the

exposed

metal

pad

underneath

the

recommended unless the ADS1610 is connected

package for proper heat dissipation. See application

directly to a DSP or controller situated nearby.

report SLMA002, located at www.ti.com, for more

Additionally, make sure the digital inputs are driven

details on the PowerPAD package.

with clean signals as ringing on the inputs can

introduce noise.

spaces (address or data). This can help reduce the

possibility of digital noise coupling into the ADS1610.

When not using this signal, replace NAND gate U1

TMS320C6000

with an inverter between R/W and RD. Two signals,

Figure 42 illustrates how to directly connect the

IOSTRB and A15, combine using NAND gate U2 to

ADS1610 to the TMS320C6000 DSP. The processor

select the ADS1610. If there are no additional

controls reading using output ARE. The ADS1610 is

devices connected to the TMS320C5400 I/O space,

selected using the DSP control output, CE2. The

U2 can be eliminated. Simply connect IOSTRB

ADS1610 16-bit data output bus is directly connected

directly to CS. The ADS1610 16-bit data output bus

to the TMS320C6000 data bus. The data ready

is directly connected to the TMS320C5400 data bus.

output (DRDY) from the ADS1610 drives interrupt

The data ready output (DRDY) from the ADS1610

EXT_INT7 on the TMS320C6000.

drives interrupt INT3 on the TMS320C5400.

Figure 43. ADS1610 – TMS320C5400 Interface

Figure 42. ADS1610 – TMS320C6000 Interface

Connection

Code Composer Studio, available from TI, provides

support for interfacing TI DSPs through a collection

of data converter plug-ins. Check the TI website,

TMS320C5400

located at www.ti.com/sc/dcplug-in, for the latest

Figure 43 illustrates how to connect the ADS1610 to

information on ADS1610 support.

the TMS320C5400 DSP. The processor controls the

reading using the outputs R/W and IS. The I/O

space-select signal (IS) is optional and is used to

prevent the ADS1610 RD input from being strobed

when the DSP is accessing other external memory

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