D ts e t
aa h e
R c e t r lc r nc
o h se Ee to is
Ma u a t r dCo o e t
n fc u e
mp n n s
R c e tr b a d d c mp n ns ae
o h se rn e
o oet r
ma ua trd u ig ete dewaes
n fcue sn i r i/ fr
h
p rh s d f m te oiia s p l r
uc a e r
o h r n l u pi s
g
e
o R c e tr waes rce td f m
r o h se
fr e rae r
o
te oiia I. Al rce t n ae
h
r nl P
g
l e rai s r
o
d n wi tea p o a o teOC
o e t h p rv l f h
h
M.
P r aetse u igoiia fcoy
at r e td sn r n la tr
s
g
ts p o rmso R c e tr e eo e
e t rga
r o h se d v lp d
ts s lt n t g aa te p o u t
e t oui s o u rne
o
rd c
me t o e c e teOC d t s e t
es r x e d h
M aa h e.
Qu l yOv riw
ai
t
e ve
• IO- 0 1
S 90
•A 92 cr ct n
S 1 0 et ai
i
o
• Qu l e Ma ua trr Ls (
ai d
n fcues it QML MI- R -
) LP F
385
53
•C a sQ Mitr
ls
lay
i
•C a sVS a eL v l
ls
p c ee
• Qu l e S p l r Ls o D sr uos( L )
ai d u pi s it f it b tr QS D
e
i
•R c e trsacic l u pir oD A a d
o h se i
r ia s p l t L n
t
e
me t aln u t a dD A sa d r s
es lid sr n L tn ad .
y
R c e tr lcrnc , L i c mmi e t
o h se Ee t is L C s o
o
tdo
t
s p ligp o u t ta s t f c so r x e t-
u pyn rd cs h t ai y u tme e p ca
s
t n fr u lya daee u loto eoiial
i s o q ai n r q a t h s r n l
o
t
g
y
s p l db id sr ma ua trr.
u pi
e yn ut
y n fcues
T eoiia ma ua trr d ts e t c o a yn ti d c me t e e t tep r r n e
h r n l n fcue’ aa h e a c mp n ig hs o u n r cs h ef ma c
g
s
o
a ds e ic t n o teR c e tr n fcue v rino ti d vc . o h se Ee t n
n p c ai s f h o h se ma ua trd eso f hs e ie R c e tr lcr -
o
o
isg aa te tep r r n eo i s mio d co p o u t t teoiia OE s e ic -
c u rne s h ef ma c ft e c n u tr rd cs o h r n l M p c a
o
s
g
t n .T pc lv le aefr eee c p r o e o l. eti mii m o ma i m rt g
i s ‘y ia’ au s r o rfrn e up s s ny C r n nmu
o
a
r xmu ai s
n
ma b b s do p o u t h rceiain d sg , i lt n o s mpetsig
y e a e n rd c c aa tr t , e in smuai , r a l e t .
z o
o
n
© 2 1 R cetr l t n s LC Al i t R sre 0 1 2 1
0 3 ohs E cr i , L . lRg s eevd 7 1 0 3
e e oc
h
T l r m r, l s v iw wrcl . m
o e n oe p ae it w . e c o
a
e
s
o ec
ADC0831/ADC0832/ADC0834/ADC0838 8-Bit Serial I/O A/D Converters with Multiplexer Options
August 1999
ADC0831/ADC0832/ADC0834/ADC0838
8-Bit Serial I/O A/D Converters with Multiplexer Options
General Description
The ADC0831 series are 8-bit successive approximation A/D
converters with a serial I/O and configurable input multiplex-
ers with up to 8 channels. The serial I/O is configured to
comply with the NSC MICROWIRE
™
serial data exchange
standard for easy interface to the COPS
™
family of proces-
sors, and can interface with standard shift registers or µPs.
The 2-, 4- or 8-channel multiplexers are software configured
for single-ended or differential inputs as well as channel as-
signment.
The differential analog voltage input allows increasing the
common-mode rejection and offsetting the analog zero input
voltage value. In addition, the voltage reference input can be
adjusted to allow encoding any smaller analog voltage span
to the full 8 bits of resolution.
n
Operates ratiometrically or with 5 V
DC
voltage
reference
n
No zero or full-scale adjust required
n
2-, 4- or 8-channel multiplexer options with address logic
n
Shunt regulator allows operation with high voltage
supplies
n
0V to 5V input range with single 5V power supply
n
Remote operation with serial digital data link
n
TTL/MOS input/output compatible
n
0.3" standard width, 8-, 14- or 20-pin DIP package
n
20 Pin Molded Chip Carrier Package (ADC0838 only)
n
Surface-Mount Package
Key Specifications
n
n
n
n
n
Resolution
Total Unadjusted Error
Single Supply
Low Power
Conversion Time
8 Bits
Features
n
NSC MICROWIRE compatible — direct interface to
COPS family processors
n
Easy interface to all microprocessors, or operates
“stand-alone”
±
1
⁄
2
LSB and
±
1 LSB
5 V
DC
15 mW
32 µs
Typical Application
DS005583-1
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
COPS
™
and MICROWIRE
™
are trademarks of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation
DS005583
www.national.com
Connection Diagrams
ADC0838 8-Channel Mux
Small Outline/Dual-In-Line Package
(WM and N)
ADC0834 4-Channel MUX
Small Outline/Dual-In-Line Package
(WM and N)
ADC0832 2-Channel MUX
Dual-In-Line Package (N)
DS005583-31
DS005583-30
COM internally connected to GND.
V
REF
internally connected to V
CC
.
Top View
COM internally connected to A GND
Top View
DS005583-8
Top View
Top View
Top View
ADC0832 2-Channel MUX
Small Outline Package (WM)
ADC0831 Single
Differential Input
Dual-In-Line Package (N)
ADC0831 Single Differential Input
Small Outline Package (WM)
DS005583-32
Top View
DS005583-41
Top View
Top View
ADC0838 8-Channel MUX
Molded Chip Carrier (PCC)
Package (V)
DS005583-42
DS005583-33
www.national.com
2
Ordering Information
Part Number
ADC0831CCN
ADC0831CCWM
ADC0832CIWM
ADC0832CCN
ADC0832CCWM
ADC0834BCN
ADC0834CCN
ADC0834CCWM
ADC0838BCV
ADC0838CCV
ADC0838CCN
ADC0838CIWM
ADC0838CCWM
See NS Package Number M14B, M20B, N08E, N14A, N20A or V20A
8
4
2
Analog Input
Channels
1
Total
Unadjusted Error
Package
Molded (N)
SO(M)
SO(M)
Molded (N)
SO(M)
Temperature
Range
0˚C to +70˚C
0˚C to +70˚C
−40˚C to +85˚C
0˚C to +70˚C
0˚C to +70˚C
0˚C to +70˚C
0˚C to +70˚C
0˚C to +70˚C
0˚C to +70˚C
0˚C to +70˚C
0˚C to +70˚C
−40˚C to +85˚C
0˚C to +70˚C
±
1
±
1
±
1
⁄
2
±
1
±
⁄
±
1
12
Molded (N)
Molded (N)
SO(M)
PCC (V)
PCC (V)
Molded (N)
SO(M)
SO(M)
3
www.national.com
Absolute Maximum Ratings
(Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Current into V
+
(Note 3)
Supply Voltage, V
CC
(Note 3)
Voltage
Logic Inputs
Analog Inputs
Input Current per Pin (Note 4)
Package
Storage Temperature
Package Dissipation
at T
A
= 25˚C (Board Mount)
15 mA
6.5V
−0.3V to V
CC
+ 0.3V
−0.3V to V
CC
+ 0.3V
±
5 mA
±
20 mA
−65˚C to +150˚C
0.8W
Lead Temperature (Soldering 10 sec.)
Dual-In-Line Package (Plastic)
Molded Chip Carrier Package
Vapor Phase (60 sec.)
Infrared (15 sec.)
ESD Susceptibility (Note 5)
260˚C
215˚C
220˚C
2000V
Operating Ratings
(Notes 1, 2)
Supply Voltage, V
CC
Temperature Range
ADC0832/8CIWM
ADC0834BCN,
ADC0838BCV,
ADC0831/2/4/8CCN,
ADC0838CCV,
ADC0831/2/4/8CCWM
4.5 V
DC
to 6.3 V
DC
T
MIN
≤T
A
≤T
MAX
−40˚C to +85˚C
0˚C to +70˚C
Converter and Multiplexer Electrical Characteristics
The following specifications apply for
V
CC
= V+ = V
REF
= 5V, V
REF
≤
V
CC
+0.1V, T
A
= T
j
= 25˚C, and f
CLK
= 250 kHz unless otherwise specified.
Boldface limits
apply from T
MIN
to T
MAX
.
Conditions
Parameter
Typ
(Note 12)
CONVERTER AND MULTIPLEXER CHARACTERISTICS
Total Unadjusted Error
ADC0838BCV
ADC0834BCN
ADC0838CCV
ADC0831/2/4/8CCN
ADC0831/2/4/8CCWM
ADC0832/8CIWM
Minimum Reference
Input Resistance (Note 7)
Maximum Reference
Input Resistance (Note 7)
Maximum Common-Mode
Input Range (Note 8)
Minimum Common-Mode
Input Range (Note 8)
DC Common-Mode Error
Change in zero
error from V
CC
= 5V
to internal zener
operation (Note 3)
V
Z
, internal
diode breakdown
(at V
+
) (Note 3)
Power Supply Sensitivity
I
OFF
, Off Channel Leakage
Current (Note 9)
V
CC
= 5V
±
5%
On Channel = 5V,
Off Channel = 0V
On Channel = 0V,
Off Channel = 5V
MIN
MAX
15 mA into V+
15 mA into V+
V
CC
= N.C.
V
REF
= 5V
1
6.3
8.5
1
6.3
8.5
1
6.3
8.5
V
LSB
µA
µA
LSB
V
CC
+0.05
GND −0.05
V
CC
+0.05
GND −0.05
V
CC
+0.05
GND−0.05
V
V
LSB
3.5
5.9
3.5
5.4
5.9
kΩ
3.5
V
REF
= 5.00 V
(Note 6)
CIWM Devices
Tested
Limit
(Note 13)
Design
Limit
(Note 14)
BCV, CCV, CCWM, BCN
and CCN Devices
Typ
(Note 12)
Tested
Limit
(Note 13)
Design
Limit
(Note 14)
Units
±
1
⁄
2
±
1
⁄
2
±
1
±
1
±
1
±
1
1.3
3.5
1.3
±
1
⁄
2
±
1
⁄
2
±
1
±
1
±
1
1.3
kΩ
LSB
(Max)
±
1/16
±
1
⁄
4
±
1/16
±
1
⁄
4
±
1
⁄
4
±
1/16
±
1
⁄
4
−0.2
−1
+0.2
+1
±
1
⁄
4
±
1/16
±
1
⁄
4
−0.2
+0.2
±
1
⁄
4
−1
+1
www.national.com
4
京公网安备 11010802033920号
EEWORLD
