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AD558JN Datasheet(PDF) 1 Page - Analog Devices

No. de pieza AD558JN
Descripción Electrónicos  DACPORT Low Cost, Complete uP-Compatible 8-Bit DAC
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

AD558JN Datasheet(HTML) 1 Page - Analog Devices

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FUNCTIONAL BLOCK DIAGRAM
CONTROL
AMP
BAND -
GAP
REFERENCE
AD558
OUTPUT
AMP
8-BIT VOLTAGE-SWITCHING
D-TO-A CONVERTER
MSB
I2L LATCHES
I2L
CONTROL
LOGIC
LSB
VOUT
VOUTSENSE A
VOUTSELECT
GND
+VCC
MSB
GND
CS
CE LSB
CONTROL
INPUTS
DIGITAL INPUT DATA (BUS)
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.
a
DACPORT Low Cost, Complete
µP-Compatible 8-Bit DAC
AD558*
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
FEATURES
Complete 8-Bit DAC
Voltage Output–2 Calibrated Ranges
Internal Precision Bandgap Reference
Single-Supply Operation: +5 V to +15 V
Full Microprocessor Interface
Fast: 1
s Voltage Settling to
1/2 LSB
Low Power: 75 mW
No User Trims
Guaranteed Monotonic Over Temperature
All Errors Specified TMIN to TMAX
Small 16-Pin DIP and 20-Pin PLCC Packages
Single Laser-Wafer-Trimmed Chip for Hybrids
Low Cost
MIL-STD-883 Compliant Versions Available
PRODUCT DESCRIPTION
The AD558 DACPORT® is a complete voltage-output 8-bit
digital-to-analog converter, including output amplifier, full
microprocessor interface and precision voltage reference on a
single monolithic chip. No external components or trims are
required to interface, with full accuracy, an 8-bit data bus to an
analog system.
The performance and versatility of the DACPORT is a result of
several recently-developed monolithic bipolar technologies. The
complete microprocessor interface and control logic is imple-
mented with integrated injection logic (I
2L), an extremely dense
and low power logic structure that is process-compatible with
linear bipolar fabrication. The internal precision voltage reference
is the patented low voltage bandgap circuit which permits full-
accuracy performance on a single +5 V to +15 V power supply.
Thin-film silicon-chromium resistors provide the stability re-
quired for guaranteed monotonic operation over the entire oper-
ating temperature range (all grades), while recent advances in
laser-wafer-trimming of these thin-film resistors permit absolute
calibration at the factory to within
±1 LSB; thus no user-trims
for gain or offset are required. A new circuit design provides
voltage settling to
±1/2 LSB for a full-scale step in 800 ns.
The AD558 is available in four performance grades. The AD558J
and K are specified for use over the 0
°C to +70°C temperature
range, while the AD558S and T grades are specified for –55
°C
to +125
°C operation. The “J” and “K” grades are available
either in 16-pin plastic (N) or hermetic ceramic (D) DIPS.
They are also available in 20-pin JEDEC standard PLCC pack-
ages. The “S” and “T” grades are available in the 16-pin her-
metic ceramic DIP package.
*Protected by U.S. Patent Nos. 3,887,863; 3,685,045; 4,323,795; Patents
Pending.
DACPORT is a registered trademark of Analog Devices, Inc.
PRODUCT HIGHLIGHTS
1. The 8-bit I2L input register and fully microprocessor-
compatible control logic allow the AD558 to be directly
connected to 8- or 16-bit data buses and operated with
standard control signals. The latch may be disabled for
direct DAC interfacing.
2. The laser-trimmed on-chip SiCr thin-film resistors are
calibrated for absolute accuracy and linearity at the factory.
Therefore, no user trims are necessary for full rated accuracy
over the operating temperature range.
3. The inclusion of a precision low voltage bandgap reference
eliminates the need to specify and apply a separate refer-
ence source.
4. The voltage switching structure of the AD558 DAC section
along with a high speed output amplifier and laser trimmed
resistors give the user a choice of 0 V to +2.56 V or 0 V to
+10 V output ranges, selectable by pin-strapping. Circuitry is
internally compensated for minimum settling time on both
ranges; typically settling to
±1/2 LSB for a full-scale 2.55 volt
step in 800 ns.
5. The AD558 is designed and specified to operate from a
single +4.5 V to +16.5 V power supply.
6. Low digital input currents, 100
µA max, minimize bus load-
ing. Input thresholds are TTL/low voltage CMOS compat-
ible over the entire operating VCC range.
7. All AD558 grades are available in chip form with guaranteed
specifications from +25
°C to T
MAX. MIL-STD-883, Class B
visual inspection is standard on Analog Devices bipolar
chips. Contact the factory for additional chip information.
8. The AD558 is available in versions compliant with MIL-
STD-883. Refer to Analog Devices Military Products Data-
book or current AD558/883B data sheet for detailed
specifications.


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