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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)： | 32/34頁 |
| 文件大?。?/td> | 975K |
| 代理商： | AD5380BST-3 |
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PRELIMINARY TECHNICAL DATA
REV. PrF 09/2003
–32–
AD5380
Thermal Monitor Function
The AD5380 contains a temperature shutdown function to protect the chip in case multiple outputs are shorted. The
short circuit current of each output amplifier is typically 40mA. Operating the AD5380 at 5V leads to a power dissipa-
tion of 200mW / shorted amplifier. With 5 channels shorted this leads to an extra watt of power dissipation. For the
100-lead LQFP the Qja is typically 44
°C
/W.
The thermal monitor is enabled by the user via CR8 in the control register. The output amplifiers on the AD5380 are
automatically powered down if the die temperature exceeds 130
°C
approx. After a thermal shutdown has occured the user
can re-enable the part by executing a soft power up if the temperature has dropped below 130
°C
or by turning off the
thermal monitor function via the control register.
INPUT
REGISTER
DATA
REGISTER
A
DAC
REGISTER
14-BIT DAC
LDAC
CONTROL INPUT
DATA
REGISTER
B
VOUT
INPUT
DATA
A/B
Figure 20. Toggle Mode Function
AD5380 in a MEMS Based Optical Optical Switch
MEMS based optical switches have a requirement for high resolution DACs in their feedforward control path that offer
high channel density with 14-bit monotonic behaviour. The AD5380, 40-channel, 14-bit DAC in a 100lead LQFP pack-
age satisifies these requirements. In the circuit shown in Figure 19, the 0V–5V outputs of the AD5380 are amplified to
achieve an output range of 0V–200V used to control actuators that determine the position of MEMS mirrors in an optical
switch. The exact position of each mirror is measured using sensors. The sensor outputs are multiplexed into a high reso-
lution ADC in determining the mirror position. The control loop is closed and driven by an ADSP-21065L, a 32-bit
SHARC
DSP with an SPI-compatible SPORT interface. It writes data to the DAC, controls the multiplexer, and reads
data from the ADC via the serial interface.
14-Bit DAC
.
.
.
.
VO1
Actuators
For
M EM S
M irror
Array
Sensor
+
M ultiplexer
8-Channel ADC
(AD7856)
AD5380
14-Bit DAC
VO40
.
.
.
.
ADSP21065L
REFIN
Output Range
0-200V
OR
Single Channel
ADC (AD7671)
+5V
AVDD
REFOUT
.
.
.
G=50
G=50
0.01uF
Figure 19 . AD5380 in a MEMS based Optical Switch
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| AD5380BST-5-REEL | 制造商:Analog Devices 功能描述:DAC 40-CH Resistor-String 14-bit 100-Pin LQFP T/R |
| AD5380BST-U2 | 制造商:Analog Devices 功能描述:DAC 40-CH RES-STRING 14BIT 100LQFP - Bulk |
| 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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