性价比较高的AD与DA

  大家在进行数据采集与控制的时候,常用需要利用A/D(数模转换芯片)与D/A(模数转换芯片),这里根据网友整理的资料,向大家推荐一些性价比较高的芯片.
A/D(数模转换):
TLC2543 (DIP 8)
TLC2543是TI公司的12位串行模数转换器，使用开关电容逐次逼近技术完成A/D转换过程。由于是串行输入结构，能够节省51系列单片机I/O资源；且价格适中，分辨率较高，因此在仪器仪表中有较为广泛的应用。
(注,TI产,The TLC2543C and TLC2543I are 12-bit, switched-capacitor, successive-approximation, analog-to-digital converters. Each device, with three control inputs [chip select (CS\), the input-output clock, and the address input (DATA INPUT)], is designed for communication with the serial port of a host processor or peripheral through a serial 3-state output. The device allows high-speed data transfers from the host.

In addition to the high-speed converter and versatile control capability, the device has an on-chip 14-channel multiplexer that can select any one of 11 inputs or any one of three internal self-test voltages. The sample-and-hold function is automatic. At the end of conversion, the end-of-conversion (EOC) output goes high to indicate that conversion is complete. The converter incorporated in the device features differential high-impedance reference inputs that facilitate ratiometric conversion, scaling, and isolation of analog circuitry from logic and supply noise. A switched-capacitor design allows low-error conversion over the full operating temperature range.

The TLC2543C is characterized for operation from TA = 0°C to 70°C. The TLC2543I is characterized for operation from TA = –40°C to 85°C. The TLC2543M is characterized for operation from TA = –55°C to 125°C.)
TLC2543的特点
（1）12位分辩率A/D转换器;
（2）在工作温度范围内10μs转换时间;
（3）11个模拟输入通道;
（4）3路内置自测试方式;
（5）采样率为66kbps;
（6）线性误差±1LSBmax;
（7）有转换结束输出EOC;
（8）具有单、双极性输出;
（9）可编程的MSB或LSB前导;
（10 可编程输出数据长度。
(11)单电源供电 5V
(12) 串行

AD574(DIP 28)
特性：
(1)12bit
(2)35us 转换时间
(3)并行
(4)双电源供电 +12v-+15v,-12v--15v
AD574A的应用:AD574(模数转换器)构成高精度数字电压表
ADS7852(QFP32)本次采用
特性：
(1)12bit
(2)500Kbps
(3)并行
(4)单电源供电 5V

ADC12081(LQFP 32)
(the ADC12081 is a monolithic CMOS analog-to-digital converter capable of converting analog input signals into 12-bit digital words at 5 megasamples per second (MSPS). The ADC12081 utilizes an innovative pipeline architecture to minimize die size and power consumption. The ADC12081 uses self-calibration and error correction to maintain accuracy and performance over temperature.

The ADC12081 converter operates on a 5V power supply and can digitize analog input signals in the range of 0 to 2V. A single convert clock controls the conversion operation. All digital I/O is TTL compatible.

The ADC12081 is designed to minimize external components necessary for the analog input interface. An internal sample-and-hold circuit samples the analog input and an internal amplifier buffers the reference voltage input.

The ADC12081 is available in the 32-lead LQFP package and is designed to operate over the extended commercial temperature range of -40°C to +85°C.)
特性：
(1)12bit
(2) 单电源供电 5v
(3) 并行
(4) 采样频率 5M
(5) 可识别 模拟电压 0－2V



D/A(模数转换芯片):
TLC5618(DIP 8)
(The TLC5618 is a dual 12-bit voltage output digital-to-analog converter (DAC) with buffered reference inputs (high impedance). The DACs have an output voltage range that is two times the reference voltage, and the DACs are monotonic. The device is simple to use, running from a single supply of 5 V. A power-on reset function is incorporated in the device to ensure repeatable start-up conditions.

Digital control of the TLC5618 is over a 3-wire CMOS-compatible serial bus. The device receives a 16-bit word for programming and producing the analog output. The digital inputs feature Schmitt triggers for high noise immunity. Digital communication protocols include the SPI™, QSPI™, and Microwire™ standards. )
特性：
(1)12 bit
(2)单电源 5v 供电
(3)串行
(4)建立时间 2.5us－－12.5us
TLC5618的应用:可编程双路12位D/A转换器TLC5618在工业仪表中的应用
AD7543(DIP16)
(The AD7543 is a precision 12-bit monolithic CMOS multiplying DAC designed for serial interface applications. The DAC's logic circuitry consists of a 12-bit serial-in parallelout shift register.)
特性：
(1)12bit
(2)串行
(3)低功耗40mw (max)
(4)单电源供电5V
(5)建立时间 未知

TLV5613CDW
特性：
(1)12bit
(2)并行
(3)1.2us
(4)单电源供电5v

MAX187/189,MCP3221,12位ADC,SOT-23封装