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The AD558 DACPORT® is a complete voltage-output 8-bit digital-to-analog converter, including output amplifier, full microprocessor interface and precision voltage reference on a single monolithic chip. No external components or trims are required to interface, with full accuracy, an 8-bit data bus to an analog system.
The performance and versatility of the DACPORT is a result of several recently-developed monolithic bipolar technologies. The complete microprocessor interface and control logic is implemented with integrated injection logic (I2L), an extremely dense and low power logic structure that is process-compatible with linear bipolar fabrication. The internal precision voltage reference is the patented low voltage bandgap circuit which permits fullaccuracy performance on a single +5 V to +15 V power supply. Thin-film silicon-chromium resistors provide the stability required for guaranteed monotonic operation over the entire operating temperature range (all grades), while recent advances in laser-wafer-trimming of these thin-film resistors permit absolute calibration at the factory to within ±1 LSB; thus no user-trims for gain or offset are required. A new circuit design provides voltage settling to ±1/2 LSB for a full-scale step in 800 ns.
The AD558 is available in four performance grades. The AD558J and K are specified for use over the 0°C to +70°C temperature range, while the AD558S and T grades are specified for 55°C to +125°C operation. The "J" and "K" grades are available either in 16-pin plastic (N) or hermetic ceramic (D) DIPS. They are also available in 20-pin JEDEC standard PLCC packages. The "S" and "T" grades are available in the 16-pin hermetic ceramic DIP package.
AD558SD Maximum Ratings
VCC to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to +18 V Digital Inputs (Pins 110) . . . . . . . . . . . . . . . . . .0 V to +7.0 V VOUT . . . . . . . . . . . . . . . . . . . . . . . Indefinite Short to Ground Momentary Short to VCC Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . .450 mW Storage Temperature Range N/P (Plastic) Packages . . . . . . . . . . . . . . . . 25°C to +100°C D (Ceramic) Package . . . . . . . . . . . . . . . . . 55°C to +150°C Lead Temperature (soldering, 10 sec) . . . . . . . . . . . . .+300°C Thermal Resistance Junction to Ambient/Junction to Case D (Ceramic) Package . . . . . . . . . . . . . . . . 100°C/W/30°C/W N/P (Plastic) Packages . . . . . . . . . . . . . . .140°C/W/55°C/W
AD558SD Features
Complete 8-Bit DAC Voltage Output2 Calibrated Ranges Internal Precision Bandgap Reference Single-Supply Operation: +5 V to +15 V Full Microprocessor Interface Fast: 1 ms Voltage Settling to 61/2 LSB Low Power: 75 mW No User Trims Guaranteed Monotonic Over Temperature All Errors Specified TMIN to TMAX Small 16-Pin DIP and 20-Pin PLCC Packages Single Laser-Wafer-Trimmed Chip for Hybrids Low Cost MIL-STD-883 Compliant Versions Available