PDF AD75004 Data sheet ( Hoja de datos )

Número de pieza	AD75004
Descripción	Quad 12-Bit D/A Converter
Fabricantes	Analog Devices
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No Preview Available ! a Quad 12-Bit D/A Converter AD75004 FEATURES 4 Complete 12-Bit D/A Functions Double-Buffered Latches Simultaneous Update of All DACs Possible ؎5 V Output Range High Stability Bandgap Reference Monolithic BiMOS Construction Guaranteed Monotonic over Temperature 3/4 LSB Linearity Guaranteed over Temperature 4 ␮s max Settling Time to 0.01% Operates with ؎12 V Supplies Low Power: 720 mW max Including Reference TTL/5 V CMOS Compatible Logic Inputs 8-Bit Microprocessor Interface 24-Pin PDIP or 28-Lead PLCC Package PRODUCT DESCRIPTION The AD75004 contains four complete, voltage output, 12-bit digital-to-analog converters, a high stability bandgap reference, and double-buffered input latches on a single chip. The convert- ers use 12 precision high speed bipolar current steering switches and laser-trimmed thin-film resistor networks to provide fast settling time and high accuracy. Microprocessor compatibility is achieved by the on-chip double-buffered latches. The design of the input latches allows direct interface to 8-bit buses. The 12 bits of data from the first rank of latches can then be transferred to the second rank, avoiding generation of spurious analog output values. The latch responds to strobe pulses as short as 50 ns, allowing use with fast microprocessors. The functional completeness and high performance of the AD75004 results from a combination of advanced switch de- sign, the BiMOS II fabrication process, and proven laser trim- ming technology. BiMOS II is an epitaxial BiCMOS process optimized for analog and converter functions. The AD75004 is trimmed at the wafer level and is specified to ± 1/2 LSB maxi- mum linearity error at 25°C and ± 3/4 LSB over the full operat- ing temperature range. The on-chip output amplifiers provide an output range of ± 5 V, with 1 LSB equal to 2.44 mV. FUNCTIONAL BLOCK DIAGRAM V REFOUT V REFIN +5V 2.22k VOLTAGE REFERENCE INPUT LATCHES 8 + 4-BIT LATCHES DAC LATCHES 12-BIT LATCH 12-BIT DAC D7 D6 D5 TTL D4 INPUTS D3 8-BIT D2 BUS D1 D0 8 + 4-BIT LATCHES 12-BIT LATCH 12-BIT DAC 8 + 4-BIT LATCHES 12-BIT LATCH 12-BIT DAC 10k VOUT3 10k VOUT2 10k VOUT1 8 + 4-BIT LATCHES 12-BIT LATCH CONTROL LOGIC TTL INPUTS 12-BIT DAC 10k VOUT0 AD75004 +12V –12V V DD VSS AGND DGND CS WR A3 A2 A1 A0 The bandgap reference on the chip has low noise, long term stability and temperature drift characteristics comparable to discrete reference diodes. The absolute value of the reference is laser trimmed to +5.00 V with 0.6% maximum error. Its tem- perature coefficient is also laser trimmed. Typical full-scale gain TC is 15 ppm/°C. With guaranteed monotonicity over the full temperature range, the AD75004 is well suited for wide temperature range performance. REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 1 page

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