AD767SD/883B Analog Devices, AD767SD/883B Datasheet

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AD767SD/883B

Manufacturer Part Number
AD767SD/883B
Description
Manufacturer
Analog Devices
Datasheet

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PRODUCT DESCRIPTION
The AD767 is a complete voltage output 12-bit digital-to-
analog 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
over the full temperature range. Typical full-scale gain T.C. is
5 ppm/ C.
*Protected by Patent Numbers 3,803,590; 3,890,611; 3,932,863; 3,978,473;
REV. A
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 implication or
otherwise under any patent or patent rights of Analog Devices.
4,020,486; and others pending.
1/2 LSB maximum linearity error and guaranteed monotonicity
FEATURES
Complete 12-Bit D/A Function
Fast 40 ns Write Pulse
0.3" Skinny DIP and PLCC Packages
Single Chip Construction
Monotonicity Guaranteed Over Temperature
Settling Time: 3 s max to 1/2 LSB
Guaranteed for Operation with
TTL/5 V CMOS Compatible Logic Inputs
MIL-STD-883 Compliant Versions Available
On-Chip Output Amplifier
High Stability Buried Zener Reference
12 V or
15 V Supplies
PRODUCT HIGHLIGHTS
1. The AD767 is a complete voltage output DAC with voltage
2. The input latch responds to write pulse widths as short as
3. The internal buried Zener reference is laser-trimmed to
4. The gain setting and bipolar offset resistors are matched to
5. The precision high-speed current steering switches and
6. The AD767 is available in versions compliant with
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
reference and digital latches on a single IC chip.
40 ns assuring direct interface with the industry’s fastest
microprocessors.
10.00 volts with a 1% maximum error. The reference
voltage is also available for external application.
the internal ladder network to guarantee a low gain temperature
coefficient and are laser trimmed for minimum full-scale and
bipolar offset errors.
on-board high-speed output amplifier settle within 1/2 LSB
for a 10 V full-scale transition in 3.0 s when properly
compensated.
MIL-STD-883. Refer to the Analog Devices Military
Products Databook or current AD767/883B data sheet for
detailed specifications.
Microprocessor-Compatible
FUNCTIONAL BLOCK DIAGRAM
12-Bit D/A Converter
AD767*
Fax: 617/326-8703

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AD767SD/883B Summary of contents

Page 1

... Patent Numbers 3,803,590; 3,890,611; 3,932,863; 3,978,473; 4,020,486; and others pending. REV. A 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 implication or otherwise under any patent or patent rights of Analog Devices ...

Page 2

... Operating Storage (All Grades) NOTES 1 AD767 “S” specifications shown for information only. Consult Analog Devices Military Databook or contact factory for a controlled specification sheet. 2 AD767A Chips specifications are tested at +25 C and, when in boldface, at +85 C. They are typical at – The digital input specifications are 100% tested at +25 C, and guaranteed but not tested over the full temperature range. ...

Page 3

... NOTES Ceramic DIP Plastic DIP Plastic Leaded Chip Carrier. 2 For details on grade and package offerings screened in accordance with MIL-STD-883, refer to the Analog Devices Military Products Databook or current AD767/883B data sheet. REV. A Ref Out, V (Pins Indefinite short to power ground OUT Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 mW *Stresses above those listed under “ ...

Page 4

... AD767 THE AD767 OFFERS TRUE 12-BIT PERFORMANCE OVER THE FULL TEMPERATURE RANGE LINEARITY ERROR: Analog Devices defines linearity error as the maximum deviation of the actual, adjusted DAC output from the ideal analog output (a straight line drawn from 0 to F.S. – 1 LSB) for any bit combination. This is also referred to as relative accuracy ...

Page 5

BIPOLAR CONFIGURATION (Figure 3) This configuration will provide a bipolar output voltage from –5.000 to +4.9976 volts, with positive full scale occurring with all bits ON (all 1s). STEP I … OFFSET ADJUST Turn OFF all bits. Adjust 100 trimmer ...

Page 6

AD767 USING THE AD767 WITH THE AD588 HIGH PRECISION VOLTAGE REFERENCE The AD767 is specified for gain drift from 15 ppm ppm/ C (depending on grade) using its internal 10 volt reference. Since the internal reference contributes ...

Page 7

... The 12-bit single buffered input register will accept 12-bit parallel data from processors such as the 68000, 8086, TMS320 series, and the Analog Devices ADSP-2100. Several illustrative examples follow. 68000 – AD767 INTERFACE Figure 6 illustrates the AD767 interface to a 68000 micro- processor. An active low decoded address is OR’ ...

Page 8

AD767 Figure 9. TMS32020 – AD767 Interface ADSP-2100 – AD767 INTERFACE The ADSP-2100 single chip DSP processor may be interfaced to the AD767 as shown in Figure 10. With a clock frequency of 32 MHz, and instruction execution in a ...

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