AD767*

·Complete 12-Bit D/A Function
      On-Chip Output Amplifier
      High Stability Buried Zener Reference
·Fast 40 ns Write Pulse
·0.3" Skinny DIP and PLCC Packages
·Single Chip Construction
·Monotonicity Guaranteed Over Temperature
·Settling Time: 3 ms max to 1/2 LSB
·Guaranteed for Operation with 612 V or 615 V Supplies
·TTL/5 V CMOS Compatible Logic Inputs
·MIL-STD-883 Compliant Versions Available

V_CC to Power Ground . . . . . . . . . . . . . . . . . . . . .0 V to +18 V
V_EE to Power Ground . . . . . . . . . . . . . . . . . . . . .0 V to 18 V
Digital Inputs (Pins 11, 1324)
     to Power Ground . . . . . . . . . . . . . . . . . .1.0 V to +7.0 V
Ref In to Reference Ground . . . . . . . . . . . . . .. . . . . . . ±12 V
Bipolar Offset to Reference Ground . . . . . . . . . .. . . . . ±12 V
10 V Span R to Reference Ground . . . . . . . . . .  . . . . . ±12 V
20 V Span R to Reference Ground . . . . . . . . . .  . . . . . ±24 V
Ref Out, VOUT (Pins 6, 9). .Indefinite short to power ground
                                                        Momentary Short to V_CC
Power Dissipation . . . . . . . . . . . . . . . . . . . . . .. . . . 1000 mW

The AD767 is a complete voltage output 12-bit digital-toanalog converter including a high stability buried Zener reference and input latch on a single chip. The converter uses 12 precision high-speed bipolar current steering switches and a laser-trimmed thin-film resistor network to provide high accuracy.

Microprocessor compatibility is achieved by the on-chip latch. The design of the input latch allows direct interface to 12-bit buses. The latch responds to strobe pulses as short as 40 ns, allowing use with the fastest available microprocessors.

The functional completeness and high performance of the AD767 result from a combination of advanced switch design, high-speed bipolar manufacturing process, and the proven laser wafer-trimming (LWT) technology.

The subsurface (buried) Zener diode on the chip provides a low-noise voltage reference which has long-term stability and temperature drift characteristics comparable to the best discrete reference diodes. The laser trimming process which provides the excellent linearity is also used to trim the absolute value of the reference as well as its temperature coefficient. The AD767 is thus well suited for wide temperature range performance with ±1/2 LSB maximum linearity error and guaranteed monotonicity over the full temperature range. Typical full-scale gain T.C. is 5 ppm/°C.