D/A Converter. AD392 Datasheet
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
Monotonicity Guaranteed TminoTmax
Linearity Error :t:1/2LSB
Low Digital-to-Analog Feedthrough, 2nV sec typ
Factory Trimmed Gain and Offset
SThe AD392 is a quad I2-bit, high-speed, voltage output digital-to-
Oanalog converter with readback in a 32-pin hermetically sealed
package. The design is based on a custom IC interface to complete
LI2-bit DAC chips which reduces chip count and provides high
reliability. The AD392 is ideal for systems requiring digital
Econtrol of many analog voltages and for the monitoring of these
Tanalog voltages especially where board space is a premium. Such
Eapplications include ATE, robotics, process controllers and
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
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.
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
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.
One Technology Way; P. O. Box 9106; Norwood, MA 02062-9106
SPECIFICATIONS = = =+Nee
+ 5V. +TA 25"C, unlessothelWisespecified)
DATA INPUTS (Pins 1-13, 16-18,30-32)
Bit ON (Logic "I")
Bit OFF (Logic "0")
T nUnto T max
Voo = 5.25V
Voo = 4.75V
VIN = VooorGND
VIN = VooorGND
Bidirectional Outputs (Pins 2-13)
Voltage Output Low (IoL = +4.0mA)
Voltage Output High (IoH = -4.0mA)
Tristate Output Leakage
T nUnto T max
DAC Output Voltage Range
Short Circuit Current
BIntegral Linearity Error
Differential Linearity Error
LIntegral Linearity Error
T nUnto T max
EDifferential Linearity Error
TESettling Time (to ::':1:/2LSB)
-20 +20 J.LA
-5 +5 mA
See Note I
-1 +1 LSB
-Monotonicity Guaranteed Over Full Temperature Range-
Change All Register Inputs
From +5VtoOV/OVto +5V
For LSB Change
Digital-to-Analog Glitch Impulse
See Note 2
See Note 3
See Note 4
Current (All Digital Inputs DGND or
+ VooONL Y, No Load)
POWER SUPPLY GAIN SENSITIVITY
+ Vcc, Voo, - VEE
See Note 5
See Note 6
Operating (Full SpecificatIons)
2 Referenced to trailing rising edge ofWR.
3Digital-to-Analog Glitch Impulse: This is a measure of the amount of charge injected from the
digital inputs to the analog outputs when the inputs change state. Specified as the area of the glitch in nV sees.
'Crosstalk is deemed as the change in anyone output as a result of any other output being driven
from -IOVto + IOV intoa2kO load.
'Ojc approximately lOoCIW.
6+VCC, +Voo, -VEEare :tIO%.
Specifications subject to change without notice.
+ Va:: to AGND (Any DAC) . . . . . . . . . . . . 0 to + 18V
- VEEto AGND (Any DAC) . . . . . . . . . . . . 0 to -18V
*Stresses above those listed under "Absolute Maximum Ratings" may cause
permanent damage to the device. This is a stess rating only and functional
operation at or above this specification is not implied. Exposure to above
maximum rating conditions for extended periods may affect device reliability.
Digital Inputs to DGND
(Pins 1-13, 16-18, 30-32)
. . . . . . -O.3Vto +7V
Analog Outputs (Pins 20,22,26,28)
Short Circuit Duration. . . . . . . . . .
(+ Va::, - VEEorAGND)
StorageTemperature. . . . . . . . . . . . - 65°C to + 150°C
ESD (Electro-Static-Discharge) sensitive device. The digital control inputs are diode protected;
however, permanent damage may occur on unconnected devices subject to high energy
electrostatic fields. Unused devices must be stored in conductive foam or shunts. The protective
foam should be discharged to the destination socket before devices are removed.
Dimensions shown in inches and (mm).
OB .I .I--- f15.85a921i44O0:3.4Jj41
(Not to Scalel
'ii' '(-, ~.~::~~~:
--1I- TI--~::~ g~:~:-1
Gain Error T minT- max
Oto + 70°C