Analog Devices Inc./Maxim Integrated

Newer Alternatives: NEW DESIGNS:AD5443High Bandwidth CMOS 12-Bit Serial Interface Multiplying D/A ConverterThe DAC8043 is a high accuracy 12-bit CMOS multiplying DAC in a space-saving 8-lead PDIP package. Featuring serial data input, double buffering, and excellent analog performance, the DAC8043 is ideal for applications where PC board space is at a premium. In addition, improved linearity and gain error performance permit reduced parts count through the elimination of trimming components. Separate input clock and load DAC control lines allow full user control of data loading and analog output.The circuit consists of a 12-bit serial-in, parallel-out shift register, a 12-bit DAC register, a 12-bit CMOS DAC, and control logic. Serial data is clocked into the input register on the rising edge of the CLK pulse. When the new data word has been clocked in, it is loaded into the DAC register with theLDinput pin. Data in the DAC register is converted to an output current by the digital-to-analog converter (DAC).The fast interface timing of the DAC8043 may reduce timing design considerations while minimizing microprocessor wait states. For applications requiring an asynchronous clear function or more versatile microprocessor interface logic, refer to theAD5443.Operating from a single 5 V power supply, the DAC8043 is the ideal low power, small size, high performance solution to many application problems. It is available in a PDIP package that is compatible with auto-insertion equipment. There is also a 16-lead SOIC package available.APPLICATIONSAuto calibration systemsProcess control and industrial automationProgrammable amplifiers and attenuatorsDigitally controlled filters

The current-output DAC8043A provides a true 12-bit accurate (±1/2 LSB) digital-to-analog converter in compact 8-pin packages. Using a brand new circuit design, on a fine line geometry process the DAC8043A takes dynamic performance to a new level. Over 150% improvement in multiplying bandwidth (2.4 MHz) and serial data loading rate (20 MHz), combined with a 3 to 1 chip size reduction, enables the new DAC8043A to be offered in one of the industry's smallest surface mount packages, the TSSOP-8. As a direct Pin-for-Pin Upgrade to the DAC8043, this part is ideal for applications where PC board space is at a premium. In addition, improved linearity and gain-error performance permit reduced parts count through the elimination of trimming components. Separate input clock and load DAC control lines allow full user control of data loading and analog output. Consuming only 10 micro amps from a single +5 V power supply, the DAC8043A is the ideal low power, small size, high performance solution to applications such as: Programmable Loop Controllers for Industrial Control, Programmable Amplifiers and Attenuators, Digitally Controlled Calibration and Filters, and Motion Control Systems. The DAC8043A is specified for operation in two electrical grades (1/2 LSB and 1 LSB) and over the extended industrial (-40°C to +85°C) temperature range.

The DAC8143 is a 12-bit serial-input, daisy-chain digital-to-analog converter. It was designed for multiple serial DAC systems where serial daisy-chaining one DAC after another is greatly simplified. The daisy chain feature saves address-decoding lines enabling simpler logic interfacing in multiple package DAC designs.The DAV8143 is ideal for data acquisition and process control systems offering the user a wide flexibility in output voltage ranges through choices of external references and output I-to-V converter op amps.Serial data in the input register (MSB first) is sequentially clocked out to the SRO pin as the new data word (MSB first) is simultaneously clocked in from the SRI pin. The strobe inputs are used to clock in/out data on the rising or falling (user selected) strobe edges (STB1, STB2,STB3, STB4).When the shift register’s data has been updated, the new data word is transferred to the DAC register with use ofLD1andLD2inputs.Separate LOAD control inputs allow simultaneous output updating of multiple DACs. An asynchronous CLEAR input resets the DAC register without altering data in the input register.Improved linearity and gain error performance permits reduced circuit parts count through the elimination of trimming components. Fast interface timing reduces timing design considerations while minimizing microprocessor wait states.The DAC8143 is available in plastic packages that are compatible with autoinsertion equipment.Plastic packaged devices come in the extended industrial temperature range of –40°C to +85°C.APPLICATIONSMultiple-Channel Data Acquisition SystemsProcess Control and Industrial AutomationTest EquipmentRemote Microprocessor-Controlled Systems

The DAC-8221 combines two identical 12-bit, multiplying, digital-to-analog converters into a single CMOS chip. This device is electrically similar to DAC-8212 with improved microprocessor interface timing and is packaged in a narrow 0.300" DIP. Monolithic construction offers excellent DAC-to-DAC matching and tracking over the full operating temperature range. The DAC-8221 consists of two thin-film R-2R resistor-ladder networks, two 12-bit data latches, one 12-bit input buffer, and control logic. The DAC-8221 operates on a single supply from +5V to +15V. Maximum power dissipation with 0V and +5V logic levels and a +5V supply is less than 0.5mW. The DAC-8221 is manufactured using PMI's highly-stable, thin film resistors on an advanced oxide-isolated, silicon-gate, CMOS process. PMI's improved latch-up resistant design eliminates the need for external protective Schottky diodes.A common 12-bit (TTL/CMOS compatible) input port is used to load a 12-bit-wide word into either of the two DACs. This port, whose data loading is similar to that of a RAM's write cycle, interfaces directly with most 12-bit or wider bus systems. WithWRandCSlines at logic LOW, the input data registers are transparent. This allows direct unbuffered data to flow directly to the DAC output selected byDAC A/DAC B control input.

The DAC-8222 is a dual 12-bit, double-buffered, CMOS digital-to-analog converter. It has a 12-bit wide data port that allows a 12-bit word to be loaded directly. This achieves faster through-put time in stand-alone systems or when interfacing to a 16-bit processor. A common 12-bit input TTL/CMOS compatible data port is used to load the 12-bit word into either of the two DACs. This port, whose data loading is similar to that of a RAM's write cycle, interfaces directly with most 12-bit and 16-bit bus systems. (See PMI's DAC-8248 for a complete 8-bit data bus interface product.) A common bus allows the DAC-8222 to be packaged in a narrow 24-pin 0.3" DIP and save PCB space.The DAC is controlled with two signals,WRandLDAC. With logic low at these inputs, the DAC registers become transparent. This allows direct unbuffered data to flow directly to either DAC output selected byDAC A/DAC B. Also, the DAC's double-buffered digital inputs will allow both DACs to be updated simultaneously.DAC8222's monolithic construction offers excellent DAC-to-DAC matching and tracking over the full operating temperature range. The chip consists of two thin-film R-2R resistor ladder networks, four 12-bit registers, and DAC control logic circuitry. The device has separate reference-input and feedback resistors for each DAC and operates on a single supply from +5 V to +15 V. Maximum power dissipation at +5 V using zero or VDDlogic levels is less than 0.5 mW.The DAC8222 is manufactured with PMI's highly stable thin-film resistors on an advanced oxide-isolated, silicon-gate, CMOS technology. PMI's improved latch-up resistant design eliminates the need for external protective Schottky diodes.