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Analog Devices Semiconductor Electronic Components Datasheet

AD561 Datasheet

Low Cost 10-Bit Monolithic D/A Converter

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AD561 pdf
a
Low Cost 10-Bit
Monolithic D/A Converter
AD561
FEATURES
Complete Current Output Converter
High Stability Buried Zener Reference
Laser Trimmed to High Accuracy (1/4 LSB Max Error,
AD561K, T)
Trimmed Output Application Resistors for 0 V to +10 V,
؎5 V Ranges
Fast Settling – 250 ns to 1/2 LSB
Guaranteed Monotonicity Over Full Operating
Temperature Range
TTL/DTL and CMOS Compatible (Positive True Logic)
Single Chip Monolithic Construction
Available in Chip Form
MlL-STD-883-Compliant Versions Available
PRODUCT DESCRIPTION
The AD561 is an integrated circuit 10-bit digital-to-analog
converter combined with a high stability voltage reference
fabricated on a single monolithic chip. Using ten precision high-
speed current-steering switches, a control amplifier, voltage
reference, and laser-trimmed thin-film SiCr resistor network,
the device produces a fast, accurate analog output current.
Laser trimmed output application resistors are also included to
facilitate accurate, stable current-to-voltage conversion; they are
trimmed to 0.1% accuracy, thus eliminating external trimmers
in many situations.
Several important technologies combine to make the AD561 the
most accurate and most stable 10-bit DAC available. The low
temperature coefficient, high stability thin-film network is
trimmed at the wafer level by a fine resolution laser system to
0.01% typical linearity. This results in an accuracy specification
of ± 1/4 LSB max for the K and T versions, and 1/2 LSB max
for the J and S versions.
The AD561 also incorporates a low noise, high stability
subsurface zener diode to produce a reference voltage with
excellent long term stability and temperature cycle characteris-
tics, which challenge the best discrete Zener references. A
temperature compensation circuit is laser-trimmed to allow
custom correction of the temperature coefficient of each device.
This results in a typical full-scale temperature coefficient of
15 ppm/°C; the TC is tested and guaranteed to 30 ppm/°C max
for the K and T versions, 60 ppm/°C max for the S, and
80 ppm/°C for the J.
The AD561 is available in four performance grades. The
AD561J and K are specified for use over the 0°C to +70°C
temperature range and are available in either a 16-pin
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.
FUNCTIONAL BLOCK DIAGRAM
TO-116
hermetically-sealed ceramic DIP or a 16-pin molded plastic
DIP. The AD561S and T grades are specified for the –55°C to
+125°C range and are available in the ceramic package.
PRODUCT HIGHLIGHTS
1. Advanced monolithic processing and laser trimming at the
wafer level have made the AD561 the most accurate 10-bit
converter available, while keeping costs consistent with large
volume integrated circuit production. The AD561K and T
have 1/4 LSB max relative accuracy and 1/2 LSB max
differential nonlinearity. The low TC R-2R ladder guaran-
tees that all AD561 units will be monotonic over the entire
operating temperature range.
2. Digital system interfacing is simplified by the use of a
positive true straight binary code. The digital input voltage
threshold is a function of the positive supply level; connect-
ing VCC to the digital logic supply automatically sets the
threshold to the proper level for the logic family being used.
Logic sink current requirement is only 25 µA.
3. The high speed current steering switches are designed to settle
in less than 250 ns for the worst case digital code transition.
This allows construction of successive-approximation A/D
converters in the 3 µs to 5 µs range.
4. The AD561 has an output voltage compliance range from
–2 V to +10 V, allowing direct current-to-voltage conversion
with just an output resistor, omitting the op amp. The 40 M
open collector output impedance results in negligible errors
due to output leakage currents.
5. The AD561 is available in versions compliant with MIL-
STD-883. Refer to the Analog Devices Military Products
Databook or current AD561/883B data sheet for detailed
specifications.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700 World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
© Analog Devices, Inc., 1997


Analog Devices Semiconductor Electronic Components Datasheet

AD561 Datasheet

Low Cost 10-Bit Monolithic D/A Converter

No Preview Available !

AD561 pdf
AD561–SPECIFICATIONS (TA = +25؇C, VCC = –15 V, unless otherwise noted.)
Model
AD561J
Min Typ Max
AD561K
Min Typ Max
RESOLUTION
ACCURACY (Error Relative
to Full Scale)
DIFFERENTIAL NONLINEARITY
DATA INPUTS
TTL, VCC = +5 V
Bit ON Logic “1”
Bit OFF Logic “0”
CMOS, 10 V VCC 16.5 V
Bit ON Logic “ 1 “
Bit OFF Logic “0”
Logic Current (Each Bit) (TMIN to TMAX)
Bit ON Logic “1”
Bit OFF Logic “0”
OUTPUT
Current
Unipolar
Bipolar
Resistance (Exclusive of
Application Resistors)
Unipolar Zero (All Bits OFF)
Capacitance
Compliance Voltage
SETTLING TIME TO 1/2 LSB
All Bits ON-to-OFF or OFF-to-ON
POWER REQUIREMENTS
VCC, +4.5 V dc to +16.5 V dc
VEE, –10.8 V dc to –16.5 V dc
POWER SUPPLY GAIN SENSITIVITY
VCC, +4.5 V dc to +16.5 V dc
VEE, –10.8 V dc to –16.5 V dc
TEMPERATURE RANGE
Operating
Storage (“D” Package)
(“N” Package)
TEMPERATURE COEFFICIENTS
With Internal Reference
Unipolar Zero
Bipolar Zero
Full Scale
Differential Nonlinearity
MONOTONICITY
PROGRAMMABLE OUTPUT
RANGES
CALIBRATION ACCURACY
Full-Scale Error with Fixed 25 `
Resistor
Bipolar Zero Error with Fixed 10
Resistor
CALIBRATION ADJUSTMENT
RANGE
Full Scale (With 50 Trimmer)
Bipolar Zero (With 50 Trimmer)
NOTES
*Specifications same as AD561J specifications.
Specifications subject to change without notice.
10 Bits
± 1/4
(0.025)
± 1/2
± 1/2
(0.05)
10 Bits
± 1/8
(0.012)
± 1/4
± 1/4
(0.025)
± 1/2
+2.0 *
+0.8
*
70% VCC
*
30% VCC
*
+5 +100
–5 –25
**
**
1.5 2.0 2.4 * * *
± 0.75 ± 1.0 ± 1.2 * * *
40 M
*
0.01 0.05
**
25 *
–2 –3 +10 * * *
250 *
8 10
12 16
**
**
2 10
4 25
**
**
0 to +70
–65 to +150
–25 to +85
**
**
**
1 10
2 20
15 80
2.5
Guaranteed Over Full Operating
Temperature Range
0 to +10
–5 to +5
15
2 10
15 30
2.5
Guaranteed Over Full Operating
Temperature Range
*
*
± 0.1 *
± 0.1 *
± 0.5 *
± 0.5 *
–2–
Units
LSB
% of FS
LSB
V
V
V
V
nA
µA
mA
mA
% of FS
pF
V
ns
mA
mA
ppm of FS/%
ppm of FS/%
°C
°C
°C
ppm of FS/°C
ppm of FS/°C
ppm of FS/°C
ppm of FS/°C
V
V
% of FS
% of FS
% of FS
% of FS
REV. A


Part Number AD561
Description Low Cost 10-Bit Monolithic D/A Converter
Maker Analog Devices
Total Page 8 Pages
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