The DAC811 is a complete, single-chip integratedcircuit,
microprocessor-compatible, 12-bit digital-toanalog
converter. The chip combines a precision voltage
reference, microcomputer interface logic, and
double-buffered latch, in a 12-bit D/A converter with
a voltage output amplifier. Fast current switches and a
laser-trimmed thin-film resistor network provide a
highly accurate and fast D/A converter.
Microcomputer interfacing is facilitated by a doublebuffered
latch. The input latch is divided into three
4-bit nibbles to permit interfacing to 4-, 8-, 12-, or
16-bit buses and to handle right-or left-justified data.
The 12-bit data in the input latches is transferred to the
D/A latch to hold the output value.
Input gating logic is designed so that loading the last
nibble or byte of data can be accomplished simultaneously
with the transfer of data (previously stored in
adjacent latches) from adjacent input latches to the
D/A latch. This feature avoids spurious analog output
values while using an interface technique that saves
computer instructions.
The DAC811 is laser trimmed at the wafer level and
is specified to ±1/4LSB maximum linearity error (B
and K grades) at 25°C and ±1/2LSB maximum over
the temperature range. All grades are guaranteed monotonic
over the specification temperature range.
The DAC811 is available in six performance grades
and three package types. DAC811J and K are specified
over the temperature ranges of 0°C to +70°C;
DAC811A and B are specified over –25°C to +85°C;
DAC811J and K are packaged in a reliable 28-pin
plastic DIP or plastic SO package, while DAC811A
and B are available in a 28-pin 0.6" wide dual-inline
hermetically sealed ceramic side-brazed package (H
package