Texas Instruments DAC8565EVM - DAC8565 Evaluation Module DAC8565EVM DAC8565EVM 数据表
产品代码
DAC8565EVM
1
EVM Overview
1.1
Features
1.2
Power Requirements
1.2.1
Supply Voltage
EVM Overview
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Parts List
2
Factory Default Jumper Setting
3
DAC Output Channel Mapping
4
Unity Gain Output Jumper Settings
5
Gain of Two Output Jumper Settings
6
Bipolar Output Operation Jumper Settings
7
Capacitive Load Drive Output Jumper Settings
8
Jumper Setting Function
This section gives a general overview of the DAC8564/65 evaluation module (EVM) and describes some
of the factors that must be considered in using this module.
of the factors that must be considered in using this module.
This EVM features the DAC8564 or the DAC8565 digital-to-analog converters (DAC). The
DAC8564/65EVM is a simple evaluation module designed as a quick and easy way to evaluate the
functionality and performance of the 16-bit high-resolution, quad-channel, and serial input DAC with a
built-in 2.5-V internal reference that is enabled by default. This EVM features a serial interface to
communicate with any host microprocessor or TI DSP-based system.
DAC8564/65EVM is a simple evaluation module designed as a quick and easy way to evaluate the
functionality and performance of the 16-bit high-resolution, quad-channel, and serial input DAC with a
built-in 2.5-V internal reference that is enabled by default. This EVM features a serial interface to
communicate with any host microprocessor or TI DSP-based system.
Although the DAC was designed for single-supply operation, a bipolar output range is also possible by
properly configuring the output operational amplifier, U2, circuit. This is discussed in detail in section 3.2.3.
In addition, the external operational amplifier is also installed as an option to provide output signal
conditioning or boost capacitive load drive and for other output mode requirement desired. The external
output operational amplifier only supports one DAC output at a time.
properly configuring the output operational amplifier, U2, circuit. This is discussed in detail in section 3.2.3.
In addition, the external operational amplifier is also installed as an option to provide output signal
conditioning or boost capacitive load drive and for other output mode requirement desired. The external
output operational amplifier only supports one DAC output at a time.
A +5-V precision voltage reference is provided via U3 as well as a provision to apply user’s choice of
reference supply via TP2 and TP3 test points. These reference supplies are optional voltage references
provided externally in case it is necessary to evaluate the DAC8564/65 with external reference circuits.
The external +5-V reference source for V
reference supply via TP2 and TP3 test points. These reference supplies are optional voltage references
provided externally in case it is necessary to evaluate the DAC8564/65 with external reference circuits.
The external +5-V reference source for V
REF
H can be selected via JMP8 jumper configuration.
The EVM also has a provision for possibly experimenting with different circuit loads on the reference of the
DAC8564/65. These are available through R25 and C14.
DAC8564/65. These are available through R25 and C14.
The following sections describe the power requirements of this EVM.
The DC power supply requirement for this DAC8564/65EVM (AVDD and IOVDD) is selectable between
+3.3 V and +5 V via jumper headers (JMP7 and JMP17). The AVDD supply of +3.3 VA comes from J3A-8
whereas the +5 VA comes from J3A-3 terminal. The IOVDD supply of +3.3 VD comes from J3A-9
whereas the +5 VD comes from J3A-10 terminal. These power supply voltages are referenced to ground
through the J3A-6 and J3A-5 terminals, respectively. The VCC and VSS supplies are only used by the U2
and U4 operational amplifiers as well as the U3 voltage reference, which ranges from +15 V to –15 V
maximum and connects through J3A-1 and J3A-2 terminals, respectively. All the analog power supplies
are referenced to analog ground through J3A-6 terminal.
+3.3 V and +5 V via jumper headers (JMP7 and JMP17). The AVDD supply of +3.3 VA comes from J3A-8
whereas the +5 VA comes from J3A-3 terminal. The IOVDD supply of +3.3 VD comes from J3A-9
whereas the +5 VD comes from J3A-10 terminal. These power supply voltages are referenced to ground
through the J3A-6 and J3A-5 terminals, respectively. The VCC and VSS supplies are only used by the U2
and U4 operational amplifiers as well as the U3 voltage reference, which ranges from +15 V to –15 V
maximum and connects through J3A-1 and J3A-2 terminals, respectively. All the analog power supplies
are referenced to analog ground through J3A-6 terminal.
The negative rail of the output operational amplifier, U2, can be selected between VSS and AGND via
JMP10 jumper. The external operational amplifier is installed as an option to provide output signal
conditioning or for other output mode requirement that is desired by the user.
JMP10 jumper. The external operational amplifier is installed as an option to provide output signal
conditioning or for other output mode requirement that is desired by the user.
C5000, C6000 are trademarks of Texas Instruments.
LabVIEW is a trademark of National Instruments Corporation.
LabVIEW is a trademark of National Instruments Corporation.
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DAC8564/65 Evaluation Module
SLAU252 – June 2008