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参数资料
| 型号： | EVAL-AD5380EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 29/40页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD5380 |
| 产品培训模块： | DAC Architectures |
| 标准包装： | 1 |
| DAC 的数量： | 40 |
| 位数： | 14 |
| 采样率（每秒）： | 125k |
| 数据接口： | DSP，I²C，MICROWIRE?，并行，QSPI?，SPI? |
| 设置时间： | 8µs |
| DAC 型： | 电压 |
| 工作温度： | -40°C ~ 85°C |
| 已供物品： | 板，CD |
| 已用 IC / 零件： | AD5380 |
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Data Sheet
AD5380
Rev. C | Page 35 of 40
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 40 mA.
Operating the AD5380 at 5 V produces a power dissipation of
200 mW per shorted amplifier. With five channels shorted, this
gives an extra watt of power dissipation. For the 100-lead LQFP,
the θJA 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
approximately 130°C. After a thermal shutdown has occurred,
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.
AD5380 IN A MEMS BASED OPTICAL SWITCH
In their feed-forward control paths, MEMS based optical
switches require high resolution DACs that offer high channel
density with 14-bit monotonic behavior. The 40-channel, 14-bit
AD5380 DAC satisfies these requirements. In the circuit in
Figure 43, the 0 V to 5 V outputs of the AD5380 are amplified
to achieve an output range of 0 V to 200 V, which is 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 resolution 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.
The ADSP-21065L writes data to the DAC, controls the
multiplexer, and reads data from the ADC via the serial
interface.
ACTUATORS
FOR MEMS
MIRROR
ARRAY
SENSOR
AND
MULTIPLEXER
8-CHANNEL ADC
(AD7856)
OR
SINGLE CHANNEL
ADC (AD7671)
AD5380
14-BIT DAC
REFOUT/REFIN
AVDD
VOUT1
VOUT39
G = 50
OUTPUT RANGE
0V TO 200V
ADSP-21065L
0.01
F
03731-043
+5V
Figure 43. AD5380 in a MEMS Based Optical Switch
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相关代理商/技术参数 |
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| EVAL-AD5381EB | 制造商:Analog Devices 功能描述:EVAL KIT FOR 40-CH, 3V/5 V, SGL-SUPPLY, 12-BIT, VOLT OUTPUT - Bulk 制造商:Rochester Electronics LLC 功能描述: |
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| EVAL-AD5382EBZ | 功能描述:BOARD EVAL FOR AD5382 RoHS:是 类别:编程器，开发系统 >> 评估板 - 数模转换器 (DAC) 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- DAC 的数量:4 位数:12 采样率（每秒）:- 数据接口:串行，SPI? 设置时间:3µs DAC 型:电流/电压 工作温度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
| EVAL-AD5383EB | 制造商:Analog Devices 功能描述:EVAL KIT FOR 32CH, 3V/5 V, SGL-SUPPLY, 12-BIT, VOLT OUTPUT D - Bulk 制造商:Rochester Electronics LLC 功能描述: |
| EVAL-AD5390EB | 制造商:Analog Devices 功能描述: |
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