Quad 8-Bit Multiplying CMOS a D/A Converter with Memory DAC8408 FEATURES A common 8-bit TTL/CMOS compatible input port is used to Four DACs in a 28 Pin, 0.6 Inch Wide DIP or 28-Pin JEDEC load data into any of the four DAC data-latches. Control lines Plastic Chip Carrier DS1, DS2, and A/B determine which DAC will accept data. 61/4 LSB Endpoint Linearity Data loading is similar to that of a RAMs write cycle. Data can Guaranteed Monotonic be read back onto the same data bus with control line R/W. The DACs Matched to Within 1% DAC8408 is bus compatible with most 8-bit microprocessors, Microprocessor Compatible including the 6800, 8080, 8085, and Z80. The DAC8408 oper- Read/Write Capability (with Memory) ates on a single +5 volt supply and dissipates less than 20 mW. TTL/CMOS Compatible The DAC8408 is manufactured using PMIs highly stable, Four-Quadrant Multiplication thin-film resistors on an advanced oxide-isolated, silicon-gate, Single-Supply Operation (+5 V) CMOS process. PMIs improved latch-up resistant design elimi- Low Power Consumption nates the need for external protective Schottky diodes. Latch-Up Resistant 1 Available In Die Form ORDERING INFORMATION APPLICATIONS Temperature Package Voltage Set Points in Automatic Test Equipment Model INL DNL Range Description Systems Requiring Data Access for Self-Diagnostics DAC8408GP 1/4 LSB 1/2 LSB 0C to +70C 28-Pin Plastic DIP Industrial Automation DAC8408ET 1/4 LSB 1/2 LSB 40C to +85C 28-Pin Cerdip Multichannel Microprocessor-Controlled Systems 2 DAC8408AT 1/4 LSB 1/2 LSB 55C to +125C 28-Pin Cerdip Digitally Controlled Op Amp Offset Adjustment DAC8408FT 1/2 LSB 1 LSB 40C to +85C 28-Pin Cerdip 2 DAC8408BT 1/2 LSB 1 LSB 55C to +125C 28-Pin Cerdip Process Control 3 DAC8408FPC 1/2 LSB 1 LSB 40C to +85C 28-Contact PLCC Digital Attenuators DAC8408FS 1/2 LSB 1 LSB 40C to +85C 28-Pin SOL DAC8408FP 1/2 LSB 1 LSB 40C to +85C 28-Pin Plastic DIP NOTES GENERAL DESCRIPTION 1 Burn-in is available on commercial and industrial temperature range parts The DAC8408 is a monolithic quad 8-bit multiplying digital-to- in cerdip, plastic DIP, and TO-can packages. For outline information see Pack- age Information section. analog CMOS converter. Each DAC has its own reference input, 2 For devices processed in total compliance to MIL-STD-883, add /883 after feedback resistor, and onboard data latches that feature part number. Consult factory for 883 data sheet. read/write capability. The readback function serves as memory 3 For availability and burn-in information on SO and PLCC packages, contact for those systems requiring self-diagnostics. your local sales office. FUNCTIONAL BLOCK DIAGRAM DAC8408 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. which may result from its use. No license is granted by implication or Tel: 617/329-4700 Fax: 617/326-8703 otherwise under any patent or patent rights of Analog Devices.DAC8408 ELECTRICAL CHARACTERISTICS ( V = +5 V V = 610 V V A, B, C, D = 0 V T = 558C to +1258C apply for DD REF OUT A DAC8408AT/BT, T = 408C to +858C apply for DAC8408ET/FT/FP/FPC/FS T = 08C to +708C apply for DAC8408GP, unless otherwise noted. A A Specifications apply for DAC A, B, C, & D.) DAC8408 Parameter Symbol Conditions Min Typ Max Units STATIC ACCURACY Resolution N 8 Bits 1, 2 Nonlinearity INL DAC8408A/E/G 1/4 LSB DAC8408B/F/H 1/2 LSB Differential DNL DAC8408A/E/G 1/2 LSB Nonlinearity DAC8408B/F/H 1 LSB Gain Error G (Using Internal R ) 1 LSB FSE FB 3, 6 Gain Tempco TC 2 40 ppm/C GFS Power Supply Rejection (V = 10%) PSR 0.001 %FSR/% DD I , , , OUT 1A B C D 13 Leakage Current I T =+25C 30 nA LKG A T = Full Temperature Range 100 nA A REFERENCE INPUT Input Voltage Range 20 V 4 Input Resistance Match R 1% A, B, C, D Input Resistance R 6 1014k IN DIGITAL INPUTS Digital Input Low V 0.8 V IL Digital Input High V 2.4 V IH 5 Input Current T = +25C 0.01 1.0 A A I T = Full Temperature Range 10.0 A IN A 6 Input Capacitance C 8pF IN DATA BUS OUTPUTS Digital Output Low V 16 mA Sink 0.4 V OL Digital Output High V 400 A Source 4 V OH Output Leakage Current I T = +25C 0.005 1.0 A LKG A T = Full Temperature Range 0.075 10.0 A A 6 DAC OUTPUTS 7 Propagation Delay t 150 180 ns PD 11,12 Settling Time t 190 250 ns S Output Capacitance C DAC Latches All 0s 30 pF OUT DAC Latches All 1s 50 pF AC Feedthrough FT (20 V F = 100 kHz) 54 dB p-p 6, 10 SWITCHING CHARACTERISTICS Write to Data Strobe Time t or T = +25C90 ns DS1 A t T = Full Temperature Range 145 ns DS2 A Data Valid to Strobe Set-Up Time t T = +25C 150 ns DSU A T = Full Temperature Range 175 ns A Data Valid to Strobe Hold Time t 10 ns DH DAC Select to Strobe Set-Up Time t 0ns AS DAC Select to Strobe Hold Time t 0ns AH Write Select to Strobe Set-Up Time t 0ns WSU Write Select to Strobe Hold Time t 0ns WH Read to Data Strobe Width t T = +25C 220 ns RDS A T = Full Temperature Range 350 ns A Data Strobe to Output Valid Time t T = +25C 320 ns CO A T = Full Temperature Range 430 ns A Output Data to Deselect Time t T = +25C 200 ns OTD A T = Full Temperature Range 270 ns A Read Select to Strobe Set-Up Time t 0ns RSU Read Select to Strobe Hold Time t 0ns RH Specifications subject to change without notice. 2 REV. A