AD392_15 Datasheet, PDF (1/6 Pages) Analog Devices – O/AConverter withReadback

ANALOG
W DEVICES
CompleteQuad12-Bit
OfAConvertewr ithReadback
FEATURES
Data Readback Capability
Four Complete, Voltage Output, 12-Bit DACs in One
32-Pin Hermetic Package
Fast Bus Access: 40ns max, Tmin-Tmax
Asynchronous Reset to Zero Volts
Minimum of Two TTL Load Drive (Readback Mode)
Double-Buffered Data Latches
OBSOLETE Monotonicity Guaranteed TminoTmax
Linearity Error :t:1/2LSB
Low Digital-to-Analog Feedthrough, 2nV sec typ
Factory Trimmed Gain and Offset
Low Cost
PRODUCT DESCRIPTION
The AD392 is a quad I2-bit, high-speed, voltage output digital-to-
analog converter with readback in a 32-pin hermetically sealed
package. The design is based on a custom IC interface to complete
I2-bit DAC chips which reduces chip count and provides high
reliability. The AD392 is ideal for systems requiring digital
control of many analog voltages and for the monitoring of these
analog voltages especially where board space is a premium. Such
applications include ATE, robotics, process controllers and
PRODUCT HIGHLIGHTS
1. The AD392 is packaged in a 32-pin DIP and is a complete
solution to space constraint multiple DAC applications.
2. Readback capability provides system monitor of DAC output
useful in ATE, robotics or any closed-loop system.
3. Fast bus access time of 40ns maximum allows for fast system
updating compatible with high-speed microprocessing.
4. Simultaneous reset to zero volts output is extremely useful
precision fIlters.
for system calibration or simply when all DAC outputs must
Featuring maximum access time of 40ns, the AD392 is capable
initially start at zero volts.
of interfacing to the fastest of microprocessors. The readback
capability provides a diagnostic check between the data sent
5. Readback drive capability of two TTL loads virtually eliminates
the need to buffer.
from the microprocessor and the actual data received and trans-
ferred to the DAC. When RESET is low, all four DACs are
simultaneously set to (bipolar) zero providing a known starting
6. Each DAC is independently addressable, providing a versatile
control architecture for simple interface to microprocessors.
point.
7. Monolithic DAC chips provide excellent linearity and guaran-
The AD392 is laser-trimmed to :!:1/2LSB integral linearity and
teed monotonicity over the full operating temperature range.
:!:ILSB max differential linearity at + 25°C. Monotonicity is
guaranteed over the full operating temperature range. The high
initial accuracy and stability over temperature are made possible
by the use of precision thin-fIlm resistors.
The individual DAC registers are accessed by the address lines
AO and Al and control lines CS and 2ND UP. These control
8. Low digital-to-analog feedthrough (2nV sec typ) is maintained
to assure DAC accuracy.
9. New pin stake package provides a low-cost solution to cost
constraint applications.
signals permit the registers of the four DACs to be loaded
sequentially and the outputs to be simultaneously updated.
The AD392 outputs are calibrated for a :!:lOV output range
with positive true offset binary input coding.
The AD392 is packaged in a 32-lead ceramic package and is
hermetically sealed. The AD392 is specified for operation over
the 0 to + 70°C temperature range.
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 implica-
tion or otherwise under any patent or patent rights of Analog Devices.
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