商品型号： DAC121C081CIMK/NOPB 库存编号： 172056 热门程度： 品牌： National 外形封装： TSOT 生产批号： 08+ 起售数量： 500 参 考 价： 0755-88393056 存货数量： 162000 产品简述： 集成电路 ,DAC121C081CIMK/NOPB 免费资料： 下载Datasheet

DAC121C081CIMK/NOPB简介:12-Bit Microprocessor Compatible Double-Buffered D
General Description
The DAC1208 and the DAC1230 series are 12-bit multiplying
D to A converters designed to interface directly with a
wide variety of microprocessors (8080, 8048, 8085, Z-80,
etc.). Double buffering input registers and associated control
lines allow these DACs to appear as a two-byte ``stack''
in the system's memory or I/O space with no additional interfacing
logic required.
The DAC1208 series provides all 12 input lines to allow single
buffering for maximum throughput when used with 16-bit
processors. These input lines can also be externally configured
to permit an 8-bit data interface. The DAC1230 series
can be used with an 8-bit data bus directly as it internally
formulates the 12-bit DAC data from its 8 input lines. All of
these DACs accept left-justified data from the processor.
The analog section is a precision silicon-chromium (Si-Cr)
R-2R ladder network and twelve CMOS current switches.
An inverted R-2R ladder structure is used with the binary
weighted currents switched between the IOUT1 and IOUT2
maintaining a constant current in each ladder leg independent
of the switch state. Special circuitry provides TTL logic
input voltage level compatibility.
The DAC1208 series and DAC1230 series are the 12-bit
members of a family of microprocessor compatible DACs
(MICRO-DACsTM). For applications requiring other resolutions,
the DAC1000 series for 10-bit and DAC0830 series
for 8-bit are available alternatives.
Features
Y Linearity specified with zero and full-scale adjust only
Y Direct interface to all popular microprocessors
Y Double-buffered, single-buffered or flow through digital
data inputs
Y Logic inputs which meet TTL voltage level specs (1.4V
logic threshold)
Y Works with g10V referenceÐfull 4-quadrant
multiplication
Y Operates stand-alone (without mP) if desired
Y All parts guaranteed 12-bit monotonic
Y DAC1230 series is pin compatible with the DAC0830
series 8-bit MICRO-DACs
Key Specifications
Y Current Settling Time 1 ms
Y Resolution 12 Bits
Y Linearity (Guaranteed
over temperature) 10, 11, or 12 Bits of FS
Y Gain Tempco 1.3 ppm/§C
Y Low Power Dissipation 20 mW
Y Single Power Supply 5 VDC to 15 VDC

DAC121C081CIMK/NOPB 时间:2008-8-26 10:31:00

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