ADI LTC2688 16路16位±15V数模转换器(DAC)解决方案

ADI公司的LTC2688是具有集成精密基准电压源的的16路16位±15V数模转换器(DAC),保证单调并具有内置轨到轨输出缓冲区,可提供或吸收高达 20mA 的电流.SoftSpan DAC 提供五个高达±15 V 的输出范围.每个通道的范围都可以独立编程,内部 4.096 V 精密基准电压源设定输出电压的精度,外部基准电压源可用于附加范围选项.三个切换引脚支持输入寄存器 A 和输入寄存器 B 在多个频率下切换或正弦抖动,模拟多路复用器简化了引脚电压,负载电流和结温的测量.可编程偏移和增益寄存器提高了 DAC 输出的精度.串行外设接口 (SPI) 和兼容 MICROWIRE™的 3 线串行接口.可独立编程的输出范围为0 V 至 5 V,0 V 至 10 V,±5 V,±10 V,和±15 V.最大 INL 误差为±3 LSB.灵活的单电源或双电源操作,6 mm × 6 mm 40 引脚 LFCSP封装.主要用在光学网络,仪器仪表,数据采集,自动测试设备,过程控制和工业自动化.本文介绍了LTC2688主要特性,功能框图和框图,以及演示板DC2873A-B主要特性,硬件连接图和电路图与材料清单.

The LTC2688 is a 16-channel,16-bit, ±15 V digital-to-analog converter(DAC) with an integrated precision reference. The LTC2688is guaranteed monotonic and has built in rail-to-rail output buffersthat can source or sink up to 20 mA. This SoftSpan™ DAC offers

five output ranges up to ±15 V. The range of each channel isindependently programmable.

The internal 4.096 V precision reference sets the accuracy of theoutput voltage. An external reference can be used for additionalrange options. Three toggle pins support Input Register A and InputRegister B toggle or sinusoidal dither at multiple frequencies. Ananalog multiplexer simplifies measurement of pin voltages, loadcurrents, and junction temperature.

Programmable offset and gain registers improve the accuracy ofthe DAC outputs.

The serial peripheral interface (SPI) and MICROWIRE™-compatible,3-wire serial interface operates on logic levels as low as 1.71 Vand clock rates up to 50 MHz.

LTC2688主要特性:

► 16 independent SoftSpan DACs

► Independently programmable output ranges: 0 V to 5 V, 0 V to10 V, ±5 V, ±10 V, ±15...