TI DAC856x双路16位低功耗电压输出DAC解决方案

TI公司的DAC856x, DAC816x和DAC756x系列分别是低功耗电压输出双路16位,14位和12位数模转换器(DAC),集成了2.5-V,4-ppm/°C基准电压,满刻度输出电压范围2.5V或5V,主要用于手提仪表,双极输出,PLC模拟输出模块,闭环伺服控制,压控振荡器, 数据采集系统和可编增益和失调调整.本文介绍了DAC856x主要特性, 方框图, 应用电路以及DAC7562EVM评估板主要特性,电路图和材料清单.
The DAC856x, DAC816x, and DAC756x are low-power, voltage-output, dual-channel, 16-, 14-, and 12-bit digital-to-analog converters (DACs), respectively. These devices include a 2.5-V, 4-ppm/℃ internal reference, giving a full-scale output voltage range of 2.5 V or 5 V. The internal reference has an initial accuracy of ±5 mV and can source or sink up to 20 mA at the VREFIN/VREFOUT pin.
These devices are monotonic, providing excellent linearity and minimizing undesired code-to-code transient voltages (glitch). They use a versatile three-wire serial interface that operates at clock rates up to 50 MHz. The interface is compatible with standard SPI, QSPI, Microwire, and digital signal processor (DSP) interfaces.
DAC856x主要特性:
Relative Accuracy:
DAC856x (16-Bit): 4 LSB INL
DAC816x (14-Bit): 1 LSB INL
DAC756x (12-Bit): 0.3 LSB INL
Glitch Energy: 0.1 nV-s
Bidirectional Reference: Input or 2.5-V Output
Output Disabled by Default
±5-mV Initial Accuracy (Max)
4-ppm/℃ Temperature Drift (Typ)
10-ppm/℃ Temperature Drift (Max)
20-mA Sink/Source Capability
Power-On Reset to Zero Scale or Mid-Scale
Low-Power: 4 mW (Typ, 5-V AVDD, Including Internal Reference Current)
Wide Power-Supply Range: 2.7 V to 5.5 V
50-MHz SPI With Schmitt-Triggered Inputs
LDAC and CLR Functions
Output Buffer With Rail-to-Rail Operation
Packages: QFN-10 (3x3 mm), MSOP-10
Temperature Range: –40℃ to 125℃
DAC856x应用:
• Portable Instrumentation
• Bipolar Outputs (reference design)
• PLC Analog Output Module (reference design)
• Closed-Loop ...