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參數(shù)資料
| 型號： | AD5380BST-3 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | 40-Channel, 3V/5V Single Supply, 14-Bit, Voltage-Output DAC |
| 中文描述： | PARALLEL, WORD INPUT LOADING, 8 us SETTLING TIME, 14-BIT DAC, PQFP100 |
| 封裝： | 14 X 14 MM, MS-026BED, LQFP-100 |
| 文件頁數(shù)： | 30/34頁 |
| 文件大?。?/td> | 975K |
| 代理商： | AD5380BST-3 |
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PRELIMINARY TECHNICAL DATA
REV. PrF 09/2003
–30–
AD5380
AD5380 to 8051
The AD5380 requires a clock synchronized to the serial
data. The 8051 serial interface must therefore be operated
in Mode 0. In this mode serial data enters and exits
through RxD and a shift clock is output on TxD. Figure
17 shows how the 8051 is connected to the AD5380. Be-
cause the AD5380 shifts data out on the rising edge of
the shift clock and latches data in on the falling edge,
the shift clock must be inverted. The AD5380 requires
its data with the MSB first. Since the 8051 outputs the
LSB first, the transmit routine must take this into account.
AD5380 to ADSP2101/2103
Figure 18 shows a serial interface between the AD5380
and the ADSP-2101/ADSP-2103. The ADSP-2101/
ADSP-2103 should be set up to operate in the SPORT
Transmit Alternate Framing Mode. The ADSP-2101/
ADSP-2103 SPORT is programmed through the SPORT
control register and should be configured as follows: Inter-
nal Clock Operation, Active Low Framing, 16-Bit Word
Length. Transmission is initiated by writing a word to the
Tx register after the SPORT has been enabled.
POWER SUPPLY DECOUPLING
In any circuit where accuracy is important, careful consid-
eration of the power supply and ground return layout
helps to ensure the rated performance. The printed circuit
board on which the AD5380 is mounted should be de-
signed so that the analog and digital sections are
separated, and confined to certain areas of the board. If
the AD5380 is in a system where multiple devices require
an AGND-to-DGND connection, the connection should
be made at one point only. The star ground point
should be established as close as possible to the device.
For supplies with multiple pins (AV
DD
, AV
CC
) it is recom-
mended to tie those pins together. The AD5380 should
have ample supply bypassing of 10 μF in parallel with
0.1 μF on each supply located as close to the package as
possible, ideally right up against the device. The 10 μF
capacitors are the tantalum bead type. The 0.1 μF capacitor
should have low Effective Series Resistance (ESR) and Ef-
fective Series Inductance (ESI), like the common
ceramic types that provide a low impedance path to
ground at high frequencies, to handle transient currents
due to internal logic switching.
The power supply lines of the AD5380 should use as large a
trace as possible to provide low impedance paths and
reduce the effects of glitches on the power supply line. Fast
switching signals such as clocks should be shielded with
digital ground to avoid radiating noise to other parts of
the board, and should never be run near the reference
inputs. A ground line routed between the D
IN
and SCLK
lines will help reduce crosstalk between them (not required
on a multilayer board as there will be a separate ground
plane, but separating the lines will help). It is essential to
minimize noise on V
IN
and REFIN lines.
Avoid crossover of digital and analog signals. Traces on
opposite sides of the board should run at right angles to
each other. This reduces the effects of feedthrough through
the board. A microstrip technique is by far the best, but not
always possible with a double-sided board. In this tech-
nique, the component side of the board is dedicated to
ground plane while signal traces are placed on the solder
side.
DR
SCK
ADSP2101/
ADSP2103
RESET
SCLK
SDO
DIN
SYNC
AD538X
DV
DD
SPI/I2C
RFS
SER/PAR
DT
TFS
Figure 18 . AD5380 -ADSP2101/ADSP3103 Interface
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| AD5380BST-3-REEL | 制造商:Analog Devices 功能描述:DAC 40-CH Resistor-String 14-bit 100-Pin LQFP T/R |
| AD5380BST-5 | 制造商:Analog Devices 功能描述:DAC 40-CH Resistor-String 14-bit 100-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:40-CHN 5V SINGLE SUPPLY 14-BIT VOUT I.C. - Bulk |
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| AD5380BSTZ-3 | 功能描述:IC DAC 14BIT 40CHAN 3V 100LQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 設(shè)置時間:1µs 位數(shù):8 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:8 電壓電源:雙 ± 功率耗散（最大）:941mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC W 包裝:帶卷 (TR) 輸出數(shù)目和類型:8 電壓，單極 采樣率（每秒）:* |
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