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Analog Devices Semiconductor Electronic Components Datasheet

AD571 Datasheet

10-Bit A/D Converter

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AD571 pdf
a
10-Bit A/D Converter
AD571*
FEATURES
Complete A/D Converter with Reference and Clock
Fast Successive Approximation Conversion: 40 s max
No Missing Codes Over Temperature
0؇C to +70؇C: AD571K
–55؇C to +125؇C: AD571S
Digital Multiplexing: Three-State Outputs
18-Pin Ceramic DIP
Low Cost Monolithic Construction
PRODUCT DESCRIPTION
The AD571 is an 10-bit successive approximation A/D con-
verter consisting of a DAC, voltage reference, clock, compara-
tor, successive approximation register and output buffers—all
fabricated on a single chip. No external components are re-
quired to perform a full accuracy 10-bit conversion in 40 µs.
Operating on supplies of +5 V to +15 V and –15 V, the
AD571 will accepts analog inputs of 0 V to +10 V unipolar of
± 5 V bipolar, externally selectable. When the BLANK and
CONVERT input is driven low, the three-state outputs will be
open and a conversion will commence. Upon completion of the
conversion, the DATA READY line goes low and the data ap-
pears at the output. Pulling the BLANK and CONVERT input
high blanks the outputs and readies the device for the next con-
version. The AD571 executes a true 10-bit conversion with no
missing codes in 40 µs maximum.
The AD571 is available in two version for the 0°C to +70°C
temperature range, the AD571J and K. The AD571S guarantees
10-bit accuracy and no missing codes from –55°C to +125°C.
*Covered by Patent Nos. 3,940,760; 4,213,806; 4,136,349.
FUNCTIONAL BLOCK DIAGRAM
DIGITAL
BLANK &
V+ V– COMMON CONVERT CONTROL
10 12
16
11
ANALOG 13
IN
5k
B&C
ANALOG 14
COMMON
COMPARATOR
BIPOLAR
OFFSET 15
CONTROL
10-BIT
CURRENT
OUTPUT
DAC
10-BIT
SAR
INT.
CLOCK
DATA
READY
3 STATE
BUFFERS
TEMPERATURE COMPENSATED
BURIED ZENER REFERENCE
AND DAC CONTROL
AUTO BLANK
CONTROL
AD571
17
DATA READY
9 MSB
8
7
6
5 BIT
4 OUTPUTS
3
2
1
18 LSB
PRODUCT HIGHLIGHTS
1. The AD571 is a complete 10-bit A/D converter. No external
components are required to perform a conversion. Full-scale
calibration accuracy of ± 0.3% is achieved without external
trims.
2. The AD571 is a single chip device employing the most ad-
vanced IC processing techniques. Thus, the user has at his
disposal a truly precision component with the reliability and
low cost inherent in monolithic construction,
3. The AD571 accepts either unipolar (0 V to +10 V) or bipolar
(–5 V to +5 V) analog inputs by grounding or opening a
single pin.
4. The device offers true 10-bit accuracy and exhibits no miss-
ing codes over its entire operating temperature range.
5. Operation is guaranteed with –15 V and +5 V or +15 V sup-
plies. The device will also operate with a –12 V supply.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703


Analog Devices Semiconductor Electronic Components Datasheet

AD571 Datasheet

10-Bit A/D Converter

No Preview Available !

AD571 pdf
AD571–SPECIFICATIONS (TA = +25؇C, V+ = +5 V, V– = –12 V or –15 V, all voltages measured with respect to
digital common, unless otherwise noted)
Model
AD571J
Min Typ
Max
AD571K
Min Typ
Max
AD571S
Min Typ
Max
Units
RESOLUTION
RELATIVE ACCURACY, TA
TMIN to TMAX
FULL-SCALE CALIBRATION
UNIPOLAR OFFSET
BIPOLAR OFFSET
10
؎1
؎1
±2
؎1
؎1
10
؎1/2
؎1/2
±2
؎1/2
؎1/2
10 Bits
؎1 LSB
؎1 LSB
± 2 LSB
؎1 LSB
؎1 LSB
DIFFERENTIAL NONLINEAIRTY, TA
TMIN to TMAX
TEMPERATURE RANGE
TEMPERATURE COEFFICIENTS
Unipolar Offset
Bipolar Offset
Full-Scale Calibration2
10
9
0
10
10
+70 0
؎2
؎2
؎4
10
10
+70 –55
؎1
؎1
؎2
+125
Bits
Bits
°C
؎2 LSB
؎2 LSB
؎5 LSB
POWER SUPPLY REJECTION
CMOS Positive Supply
+13.5 V V + +16.5 V
TTL Positive Supply
+4.5 V V + +5.5 V
Negative Supply
–16.0 V V – –13.5 V
ANALOG INPUT IMPEDANCE
ANALOG INPUT RANGES
Unipolar
Bipolar
–––
؎2
؎2
3.0 5.0 7.0
0 +10
–5 +5
؎1
؎1
؎1
3.0 5.0 7.0
0 +10
–5 +5
– – – LSB
؎2 LSB
؎2 LSB
3.0 5.0 7.0 k
0 +10 V
–5 +5 V
OUTPUT CODING
Unipolar
Bipolar
Positive True Binary
Positive True Offset Binary
Positive True Binary
Positive True Offset Binary
Positive True Binary
Positive True Offset Binary
LOGIC OUTPUT
Output Sink Current
(VOUT = 0.4 V max, TMIN to TMAX)
Output Source Current1
(VOUT = 2.4 V max, TMIN to TMAX)
Output Leakage
LOGIC INPUT
Input Current
Logic “1”
Logic “0”
CONVERSION TIME, TMIN to TMAX
POWER SUPPLY
V+
V–
3.2
0.5
2.0
15
+4.5
–12.0
25
+5.0
–15
؎40
؎100
0.8
40
+7.0
–16.5
3.2
0.5
2.0
15 25
+4.5
–12.0
+5.0
–15
؎40
؎100
0.8
40
+16.5
–16.5
3.2
0.5
2.0
15 25
+4.5
–12.0
+5.0
–15
mA
mA
؎40 µA
؎100
0.8
40
µA
V
V
µs
+7.0
–16.5
V
V
OPERATING CURRENT
V+
V–
7 10
9 15
7 10
9 15
7 10 mA
9 15 mA
PACKAGE OPTION2
Ceramic DIP (D-18)
AD571JD
AD571KD
AD571SD
NOTES
1The data output lines have active pull-ups to source 0.5 mA. The DATA READY line is open collector with a nominal 6 kinternal pull-up resistor.
2For details on grade and package offerings for SD-grade in accordance with MIL-STD-883, refer to Analog Devices’ Military Products databook or current /883B
data sheet.
Specifications subject to change without notice.
Specifications shown in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min
and max specifications are guaranteed, although only those shown in boldface are tested on all production units.
–2– REV. A


Part Number AD571
Description 10-Bit A/D Converter
Maker Analog Devices
Total Page 8 Pages
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