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AD1380

Low Cost 16-Bit Sampling ADC



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AD1380 pdf
FEATURES
Complete sampling 16-bit ADC with reference and clock
50 kHz throughput
±1/2 LSB nonlinearity
Low noise SHA: 300 μV p-p
32-lead hermetic DIP
Parallel output
Low power: 900 μW
APPLICATIONS
Medical and analytical instrumentation
Signal processing
Data acquisition systems
Professional audio
Automatic test equipment (ATE)
Telecommunications
GENERAL DESCRIPTION
The AD1380 is a complete, low cost 16-bit analog-to-digital
converter, including internal reference, clock and sample/hold
amplifier. Internal thin-film-on-silicon scaling resistors allow
analog input ranges of ±2.5 V, ±5 V, ±10 V, 0 V to +5 V and
0 V to +10 V.
Important performance characteristics of the AD1380 include
maximum linearity error of ±0.003% of FSR (AD1380KD) and
maximum 16-bit conversion time of 14 μs. Transfer
characteristics of the AD1380 (gain, offset and linearity) are
specified for the combined ADC/sample-and-hold amplifier
(SHA), so total performance is guaranteed as a system. The
AD1380 provides data in parallel with corresponding clock and
status outputs. All digital inputs and outputs are TTL or 5 V
CMOS-compatible.
The serial output function is no longer available after date
code 0120.
Low Cost
16-Bit Sampling ADC
AD1380
FUNCTIONAL BLOCK DIAGRAM
S/H +10V +20V
COMPARATOR GAIN
OUT SPAN SPAN BIPOLAR
IN
ADJ
32 6
7
4
53
AD1380
24 MSB
S/H IN 31
+5V 29
SAMPLE
AND
HOLD
REF
ADC
23 BIT 2
10 BIT 15
DIGITAL 30
COMMON
+15V 2
ANALOG 8
COMMON
TIMING CIRCUITRY
9 LSB
25 NC
27 BUSY
–15V 1
28
START
CONVERT
26
CLOCK
OUT
NC = NO CONNECT
Figure 1.
Rev. D
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 that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved.



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AD1380 pdf
AD1380
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Theory of Operation ........................................................................ 6
Description of Operation ................................................................ 7
Gain Adjustment .......................................................................... 7
Zero Offset Adjustment............................................................... 7
Timing............................................................................................ 7
REVISION HISTORY
6/05—Rev. C to Rev. D
Updated Format................................................................. Universal
Updated Outline Dimensions ....................................................... 12
5/03—Rev. B to Rev. C
Removed serial output function and updated
format.................................................................................. Universal
Change to Product Description...................................................... 1
Change to Functional Block Diagram ........................................... 1
Change to Figure 5 .......................................................................... 4
Deleted Text from Digital Output Data section ........................... 5
Deleted Figure 7 and Renumbered Remainder of Figures.......... 5
Updated Outline Dimensions ......................................................... 8
Digital Output Data ......................................................................8
Input Scaling ..................................................................................8
Calibration (14-Bit Resolution Examples) .................................9
Grounding, Decoupling and Layout Considerations ...............9
Applications..................................................................................... 11
Outline Dimensions ....................................................................... 12
Ordering Guide .......................................................................... 12
Rev. D | Page 2 of 12



Part Number AD1380
Description Low Cost 16-Bit Sampling ADC
Maker Analog Devices - Analog Devices
Total Page 12 Pages
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