The AD57801 is a true 18-bit, unbuffered voltage output DAC that operates from a bipolar supply of up to 33 V. The AD5780 accepts a positive reference input range of 5 V to VDD − 2.5 V and a negative reference input range of VSS + 2.5 V to 0 V. Both reference inputs are buffered on chip and external buffers are not required. The AD5780 offers a relative accuracy specifica-tion of ±1 LSB maximum range, and operation is guaranteed monotonic with a ±1 LSB DNL maximum range specification.
The part uses a versatile 3-wire serial interface that operates at clock rates of up to 35 MHz and is compatible with standard SPI, QSPI™, MICROWIRE™, and DSP interface standards. The part incorporates a power-on reset circuit that ensures that the DAC output powers up to 0 V in a known output impedance state and remains in this state until a valid write to the device takes place. The part provides an output clamp feature that places the output in a defined load state.
AD57801产品亮点:
True 18-bit accuracy.
Wide power supply range of up to ±16.5 V.
−40℃ to +125℃ operating temperature range.
Low 8 nV/√Hz noise.
Low ±0.018 ppm/℃ gain error temperature coefficient
AD57801主要特性:
True 18-bit voltage output DAC, ±1 LSB INL
8 nV/√Hz output noise spectral density
0.025 LSB long-term linearity error stability
±0.018 ppm/°C gain error temperature coefficient
2.5 μs output voltage settling time
3.5 nV-sec midscale glitch impulse
Integrated precision reference buffers
Operating temperature range: −40℃ to +125℃
4 mm × 5 mm LFCSP package
Wide power supply range of up to ±16.5 V
35 MHz Schmitt triggered digital interface
1.8 V-compatible digital interface
AD57801应用:
Medical instrumentation
Test and measurement
Industrial control
Scientific and aerospace instrumentation
Data acquisition systems
Digital gain and offset adjustment
Power supply control
图1.AD57801功能框图
图2.AD57801典型工作电路图
AD57801评估板EVAL-AD5780
Evaluation Board for a 18-Bit Serial Input, Voltage Output DAC with Integrated Precision Reference Buffer Amplifiers
The EVAL-AD5780 is a full-featured evaluation board, designed to allow the user to easily evaluate all features of the AD5780 voltage output, 18-bit digital-to-analog converter (DAC). The AD5780 pins are accessible at on-board connectors for external connection. The board can be controlled by two means: via the on-board connector (J3), or via the system development platform connector (J4). The SDP board allows the evaluation board to be controlled through the USB port of a Windows® XP- (SP2 or later) or Vista-based (32-bit) PC using the AD5780 evaluation software.
评估板EVAL-AD5780主要特性:
Full-featured evaluation board for the AD5780
Link options
PC control in conjunction with Analog Devices, Inc., system development platform
PC software for control
图3.评估板EVAL-AD5780框图
图4.评估板EVAL-AD5780电路图:AD5780
图5.评估板EVAL-AD5780电路图:电压参考电路
图6.评估板EVAL-AD5780电路图:SDP板连接器
图7. 18位精度±10V电压源简化电路图
评估板EVAL-AD5780材料清单:
图8.评估板EVAL-AD5780 PCB布局图
详情请见:
http://www.analog.com/static/imported-files/data_sheets/AD5780.pdf
和
http://www.analog.com/static/imported-files/user_guides/UG-256.pdf
上一篇:基于ARM的定时继电器驱动模板的设计
下一篇:FPGA设计中常用的低功耗技术
推荐阅读最新更新时间:2023-10-18 16:29
Vishay线上图书馆
- 选型-汽车级表面贴装和通孔超快整流器
- 你知道吗?DC-LINK电容在高湿条件下具有高度稳定性
- microBUCK和microBRICK直流/直流稳压器解决方案
- SOP-4小型封装光伏MOSFET驱动器VOMDA1271
- 使用薄膜、大功率、背接触式电阻的优势
- SQJQ140E车规级N沟道40V MOSFET