ADS1610
www.ti.com
SBAS344C–AUGUST 2005–REVISED OCTOBER 2006
In general, keep the resistances used in the driving
circuits for the inputs and reference low to prevent
excess thermal noise from degrading overall
performance. Avoid having the ADS1610 digital
outputs drive heavy loads. Buffers on the outputs are
recommended unless the ADS1610 is connected
directly to a DSP or controller situated nearby.
Additionally, make sure the digital inputs are driven
with clean signals as ringing on the inputs can
introduce noise.
The ADS1610 uses TI PowerPAD™ technology. The
PowerPAD is physically connected to the substrate
of the silicon inside the package and must be
soldered to the analog ground plane on the PCB
using the exposed metal pad underneath the
package for proper heat dissipation. See application
report SLMA002, located at www.ti.com, for more
details on the PowerPAD package.
APPLICATION INFORMATION
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
with an inverter between R/W and RD. Two signals,
IOSTRB and A15, combine using NAND gate U2 to
select the ADS1610. If there are no additional
devices connected to the TMS320C5400 I/O space,
U2 can be eliminated. Simply connect IOSTRB
directly to CS. The ADS1610 16-bit data output bus
is directly connected to the TMS320C5400 data bus.
The data ready output (DRDY) from the ADS1610
drives interrupt INT3 on the TMS320C5400.
INTERFACING THE ADS1610 TO THE
TMS320C6000
Figure 42 illustrates how to directly connect the
ADS1610 to the TMS320C6000 DSP. The processor
controls reading using output ARE. The ADS1610 is
selected using the DSP control output, CE2. The
ADS1610 16-bit data output bus is directly connected
to the TMS320C6000 data bus. The data ready
output (DRDY) from the ADS1610 drives interrupt
EXT_INT7 on the TMS320C6000.
ADS1610
TMS320C5400
ADS1610
TMS320C6000
16
16
DOUT[15:0]
D[15:0]
DOUT[15:0]
XD[15:0]
DRDY
CS
INT3
DRDY
CS
EXT_INT7
CE2
IOSTRB
A15
U2
U1
R/W
IS
RD
RD
ARE
Figure 43. ADS1610 – TMS320C5400 Interface
Connection
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,
located at www.ti.com/sc/dcplug-in, for the latest
information on ADS1610 support.
INTERFACING THE ADS1610 TO THE
TMS320C5400
Figure 43 illustrates how to connect the ADS1610 to
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
21
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