Texas Instruments DAC8411EVM - DAC8411 Evaluation Module DAC8411EVM DAC8411EVM Datenbogen
Produktcode
DAC8411EVM
www.ti.com
Digital Interface
3
Digital Interface
The SC70 DAC EVM is designed for easy interfacing to multiple control platforms. Samtec part numbers
SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row, header/socket
combination at J1. This header/socket provides access to the digital control and serial data pins of the
SC70 DAC EVM. Consult Samtec at
SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row, header/socket
combination at J1. This header/socket provides access to the digital control and serial data pins of the
SC70 DAC EVM. Consult Samtec at
or 1-800-SAMTEC-9 for a variety of mating
connector options.
Table 2. Digital Control
Pin Number
Signal
Description
J1.1
CS
Active-low input to SYNC enables data transfer – jumper configurable (see schematic) via JP1
J1.3
SCLK
Serial clock
J1.5
SCLK(R)
Serial clock return (for DSP host systems)
J1.7
FS
Frame synchronization for DSP host systems – default SYNC input through JP1 (see schematic)
J1.9
FS(R)
Frame synchronization return (for DSP host systems)
J1.11
DX
Serial data input
J1.13
DR
Serial data return (for DSP host systems)
J1.4
J1.10
GND
System (EVM) ground
J1.18
4
Power Supplies
The SC70 DAC EVM board requires a single, +5-VDC power supply for proper operation. This 5-V supply
powers the voltage reference (U2) and the external reference buffer (U3). When used in combination with
one of the DAP interface boards, J3 provides connection to the common power bus described in
document
powers the voltage reference (U2) and the external reference buffer (U3). When used in combination with
one of the DAP interface boards, J3 provides connection to the common power bus described in
document
shows the pinout of J3.
Table 3. J3 Power Input
Signal
Pin Number
Signal
Unused
1
2
Unused
+5VA
3
4
Unused
GND
5
6
GND
Unused
7
8
Unused
Unused
9
10
Unused
When power is supplied to J3, JP2 allows for one of two different DC voltages to be applied to the DAC
installed on the EVM. Review the schematic and PCB silkscreen for details.
installed on the EVM. Review the schematic and PCB silkscreen for details.
4.1
DAC Power
JP2 allows the user to select the power supply used by the DAC installed in position U1 on the EVM. The
series of DACs supported on this EVM use a single input as both power and reference voltages. When
JP2 is in the default factory position (shunt on pins 1-2), power to the DAC comes from a precision
4.096-V reference. When the shunt on JP2 is moved to pins 2-3, the user may apply an external
power/reference source to the DAC via J2 pin 20.
series of DACs supported on this EVM use a single input as both power and reference voltages. When
JP2 is in the default factory position (shunt on pins 1-2), power to the DAC comes from a precision
4.096-V reference. When the shunt on JP2 is moved to pins 2-3, the user may apply an external
power/reference source to the DAC via J2 pin 20.
3
SLAU299 – November 2009
SC70 DAC EVM
Copyright © 2009, Texas Instruments Incorporated