ADC1031 National Semiconductor, ADC1031 Datasheet

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ADC1031

Manufacturer Part Number
ADC1031
Description
ADC1031/ADC1034/ADC1038 10-Bit Serial I/O A/D Converters with Analog Multiplexer and Track/Hold Function
Manufacturer
National Semiconductor
Datasheet
C 1995 National Semiconductor Corporation
ADC1031 ADC1034 ADC1038 10-Bit Serial
I O A D Converters with Analog Multiplexer
and Track Hold Function
General Description
The ADC1031 ADC1034 and ADC1038 are 10-bit succes-
sive approximation A D converters with serial I O The seri-
al input for the ADC1034 and ADC1038 controls a single-
ended analog multiplexer that selects one of 4 input chan-
nels (ADC1034) or one of 8 input channels (ADC1038) The
ADC1034 and ADC1038 serial output data can be config-
ured into a left- or right-justified format
An input track hold is implemented by a capacitive refer-
ence ladder and sampled-data comparator This allows the
analog input to vary during the A D conversion cycle
Separate serial I O and conversion clock inputs are provid-
ed to facilitate the interface to various microprocessors
Applications
Y
Y
Y
Y
TRI-STATE is a registered trademark of National Semiconductor Corporation
MICROWIRE
Connection Diagrams
Ordering Information
Engine control
Process control
Instrumentation
Test equipment
ADC1031 In NS Package N08E
TM
is a trademark of National Semiconductor Corporation
Top View
TL H 10556–4
TL H 10556
Industrial
ADC1031CIN
ADC1034CIN
ADC1034CIWM
ADC1038CIN
ADC1038CIWM
Military
ADC1034CMJ
ADC1038CMJ
b
Dual-In-Line and SO Packages
55 C
b
ADC1034 In NS Packages
40 C
J16A M16B or N16E
s
s
T
A s
Top View
T
A s
a
a
125 C
Features
Y
Y
Y
Y
Y
Y
Y
Y
Key Specifications
Y
Y
Y
Y
Y
Y
85 C
Serial I O (MICROWIRE
Separate asynchronous converter clock and serial data
I O clock
Analog input track hold function
Ratiometric or absolute voltage referencing
No zero or full scale adjustment required
0V to 5V analog input range with single 5V power
supply
TTL MOS input output compatible
No missing codes
Resolution
Total unadjusted error
Single supply
Power dissipation
Max conversion time (f
Serial data exchange time (f
TL H 10556 – 3
Package
Package
M16B
M20B
N08E
N16E
N20A
J16A
J20A
C
ADC1038 In NS Packages
TM
e
J20A M20B or N20A
compatible)
S
3 MHz)
e
Top View
1 MHz)
RRD-B30M75 Printed in U S A
g
13 7 s (max)
20 mW (max)
January 1995
1 LSB (max)
10 s (max)
TL H 10556 – 2
5V
10 bits
g
5%

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ADC1031 Summary of contents

Page 1

... Converters with Analog Multiplexer and Track Hold Function General Description The ADC1031 ADC1034 and ADC1038 are 10-bit succes- sive approximation A D converters with serial I O The seri- al input for the ADC1034 and ADC1038 controls a single- ended analog multiplexer that selects one of 4 input chan- ...

Page 2

... Analog Input Voltage IN On Channel Leakage Current (Note 12) Off Channel Leakage Current (Note 12) Power Supply Zero Error Sensitivity Full Scale Error Operating Ratings (Notes 1 3) Temperature Range ADC1031CIN ADC1034CIN 6 5V ADC1034CIWM ADC1038CIN ADC1038CIWM ADC1034CMJ ADC1038CMJ Supply Voltage (V ...

Page 3

Electrical Characteristics The following specifications apply for V CC specified Boldface limits apply for T A Symbol Parameter DIGITAL AND DC CHARACTERISTICS V Logical ‘‘1’’ Input Voltage IN(1) V Logical ‘‘0’’ Input Voltage IN(0) I Logical ‘‘1’’ Input Current IN(1) ...

Page 4

... Absolute Maximum Ratings whichever is lower For this e b Jmax these parts when board mounted follow ADC1031 with CIN suffixes ADC1034 with CMJ JA resistor levels (4 5V) as high level analog inputs (5V) can cause an input diode to conduct especially ...

Page 5

Typical Performance Characteristics Power Supply Current ( CLK Linearity Error vs C Frequency CLK Power Supply Current (I ) Reference Current ( Ambient Temperature vs Ambient Temperature Linearity Error vs Linearity Error vs Ambient ...

Page 6

Test Circuits 10556–6 Timing Diagrams DO High to Low State TL H 10556–9 DI Data Input Timing TL H 10556– except ‘‘TRI-STATE’’ 10556 – Low to High State ...

Page 7

... Timing Diagrams (Continued) ADC1038 ADC1034 CS High during Conversion C continuously enabled CLK ADC1031 CS High during Conversion 10556– 10556– 15 ...

Page 8

Timing Diagrams (Continued) ADC1038 ADC1034 CS Low Continuously C continuously enabled CLK Multiplexer Address Channel Assignment Tables ADC1038 MUX Address ...

Page 9

ADC1038 Functional Block Diagram 9 ...

Page 10

... DO is erroneous as it depends on the state of the Parallel Load 16-Bit Shift Regis- ter on power up which is unpredictable The ADC1031 implements its serial interface with only four control pins since it has only one analog input and comes in shifts out the ...

Page 11

... After the channel address is received the ladder is switched to sample the proper ana- log input This sampling mode is maintained for cycles after the multiplexer addressing information is loaded in For the ADC1031 4 8 the sampling of the analog input starts on S ’s 4th rising edge CLK ...

Page 12

... External Reference 2 5V Full Scale TL H 10556– REFERENCE AND INPUT The two V inputs of the ADC1031 4 8 are fully differen- REF tial and define the zero to full-scale input range of the converter This allows the designer to easily vary the span ...

Page 13

Protecting the Analog Inputs Zero-Shift and Span-Adjust (2V Diodes are IN914 TL H 10556 – 5V resistors 10556– 10556 – 27 ...

Page 14

14 ...

Page 15

Physical Dimensions inches (millimeters) Order Number ADC1034CMJ NS Package Number J16A Order Number ADC1038CMJ NS Package Number J20A 15 ...

Page 16

Physical Dimensions inches (millimeters) (Continued) Order Number ADC1034CIWM NS Package Number M16B Order Number ADC1038CIWM NS Package Number M20B 16 ...

Page 17

... Physical Dimensions inches (millimeters) (Continued) Order Number ADC1031CIN NS Package Number N08E Order Number ADC1034CIN NS Package Number N16E 17 ...

Page 18

... National Semiconductor National Semiconductor National Semiconductores Japan Ltd Hong Kong Ltd Do Brazil Ltda Sumitomo Chemical 13th Floor Straight Block ...

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