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參數(shù)資料
| 型號(hào)： | DEM-DAC90X |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Evaluation Fixture for the DAC900, DAC902, DAC904, DAC908(DAC900, DAC902, DAC904, DAC908的評(píng)估夾具) |
| 中文描述： | 評(píng)價(jià)夾具的DAC900，DAC902，DAC904，DAC908（DAC900，DAC902，DAC904，DAC908的評(píng)估夾具） |
| 文件頁數(shù)： | 2/11頁 |
| 文件大?。?/td> | 377K |
| 代理商： | DEM-DAC90X |
2
DEM-DAC90xU, E
FUNCTIONAL DESCRIPTION
Two versions of the DEM-DAC90xU evaluation board are
available to support in the evaluation process of the high-
speed digital-to-analog converter, DAC90x. The DEM-
DAC90xU is a generic board designed for the SO-28 pack-
age models of the DAC90xU family. All DAC90x models
feature the same pin out (MSB justified, Pin 1), and may be
soldered into the same 28-pin socket. The unused digital
inputs may be left unconnected.
The DEM-DAC90xE evaluation boards are designed for the
TSSOP-28 package version and include the D/A converter,
as shown in Table I.
The board allows the user to operate the DAC90x in a
variety of configurations. The output signal, for example,
can be examined either single-ended or differentially using
the on-board operational amplifier or transformer. The user
can also evaluate the use of an external reference, which
may be desired to increase the gain accuracy of the con-
verter. In addition, the power down (PD) feature of the
DAC90x may be exercised. For a more detailed description
of the functions of the DAC90x, refer to the individual data
sheets.
BOARD SETUP AND CONFIGURATION
A typical evaluation board setup is shown in Figure 1. For
this setup, some equipment is needed (i.e., a digital word
generator and clock source to provide the digital stimulus to
the converter, a spectrum analyzer, and an oscilloscope to
observe the output signal in its frequency and time domain.
Linear, low-noise power supplies are recommended, and
should be capable of supplying at least 100mA each.
Although the DEM-DAC90x evaluation board allows for a
variety of configurations, it is shipped with the following
configuration:
The digital inputs are set to be directly driven by the word
generator using standard positive logic (TTL, CMOS). A
set of resistor networks, RP1, RP2 (22
), are placed in
series with the digital input lines.
The differential analog outputs (I
OUT
, I
OUT
) of the DAC90x
are terminated to ground with 49.9
resistors (R3, R4).
The differential signal is converted into a single-ended
signal using a transformer (T1).
The DAC90x is set up for internal reference, with solder
jumper JP2 connected in its “B” position. The “EXT INT”
pin is grounded.
The full-scale current output of the DAC90x is set to
20mA (typ) FSR. This is defined by I
OUT
FS = 32 V
REF
/
R
SET
, with V
REF
= 1.24V and R
SET
= R6 = 2k
. Solder
jumper JP4 is closed.
The operational amplifier OPA680 (U2) and its external
components are assembled, but not connected to the
output of the DAC90x; solder jumper JP6A and JP6B are
open. Refer to the “Signal Output” section for more
details.
To evaluate other functions of the DAC90x the user must
assemble the necessary components to the applicable
board sections.
POWER SUPPLY CONNECTIONS
The DAC90x converter is powered by two power supplies,
an analog supply (+V
A
) and a digital supply (+V
D
). The
typical test setup of the evaluation board DEM-DAC90x is
shown in Figure 1. Each of the supplies may be varied
independently from +3V to +5V depending on the
application’s requirements. When operating the DAC90x
DEMOBOARD PRODUCT
USED FOR DAC90x PRODUCT
DESCRIPTION
DEM-DAC90xU
DAC908U, DAC900U,
DAC902U, DAC904U
8-bit to 14-bit D/A converter, SO-28 package version. Samples of desired
DAC90xU model must be ordered separately.
DEM-DAC908E
DAC908E
8-bit D/A converter, TSSOP-28 package version, part already assembled
onto the board.
DEM-DAC900E
DAC900E
10-bit D/A converter, TSSOP-28 package version, part already assembled
onto the board.
DEM-DAC902E
DAC902E
12-bit D/A converter, TSSOP-28 package version, part already assembled
onto the board.
DEM-DAC904E
DAC904E
14-bit D/A converter, TSSOP-28 package version, part already assembled
onto the board.
TABLE I. Available Evaluation Boards for the DAC90x Family.
Word
Generator
CN1
Digital Data Inputs
DEM-DAC90x
Evaluation Board
Clock
Source
Digital
Supply,
+V
D
= 3V to 5V
+V
D
DGND
P1
EXTCLK
J1
Spectrum
Analyzer
Oscilloscope
Analog
Output
J7
Analog
Supply,
+V
A
= 3V to 5V
AGND +V
A
P2
Optional
Analog
Supply
GND
±
5V
P3
FIGURE 1. DAC90x Evaluation Board Test Setup.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DEM-DAC90XU | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 10-Bit 165MSPS SpeedPlus DAC RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| DEM-DAI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DEM-DAI - EVALUATION FIXTURE |
| DEM-DAI1600 | 功能描述:DEMO BOARD FOR PCM1600 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 系列:SoundPlus™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時(shí)間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
| DEM-DAI1602 | 功能描述:音頻 IC 開發(fā)工具 DEM-DAI1602 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
| DEM-DAI1604 | 功能描述:DEMO BOARD FOR PCM1604 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 系列:SoundPlus™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時(shí)間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
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