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PDF AD-C0838CCN Data sheet ( Hoja de datos )
| Número de pieza | AD-C0838CCN | |
| Descripción | ADC0838 | |
| Fabricantes | ETC | |
| Logotipo |  |
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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.
Features
n NSC MICROWIRE compatible — direct interface to
COPS family processors
n Easy interface to all microprocessors, or operates
“stand-alone”
n Operates ratiometrically or with 5 VDC 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 Resolution
n Total Unadjusted Error
n Single Supply
n Low Power
n Conversion Time
8 Bits
±1⁄2 LSB and ±1 LSB
5 VDC
15 mW
32 µs
Typical Application
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
COPS™ and MICROWIRE™ are trademarks of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS005583
DS005583-1
www.national.com
1 page  
Converter and Multiplexer Electrical Characteristics The following specifications apply for
VCC = V+ = VREF = 5V, VREF ≤ VCC +0.1V, TA = Tj = 25˚C, and fCLK = 250 kHz unless otherwise specified. Boldface limits
apply from TMIN to TMAX. (Continued)
Parameter
Conditions
CONVERTER AND MULTIPLEXER CHARACTERISTICS
ION, On Channel Leakage
Current (Note 9)
On Channel=0V,
Off Channel=5V
On Channel=5V,
Off Channel=0V
DIGITAL AND DC CHARACTERISTICS
VIN(1), Logical “1” Input
Voltage (Min)
VCC=5.25V
VIN(0), Logical “0” Input
Voltage (Max)
VCC=4.75V
IIN(1), Logical “1” Input
Current (Max)
VIN=5.0V
IIN(0), Logical “0” Input
Current (Max)
VIN=0V
VOUT(1), Logical “1” Output
Voltage (Min)
VOUT(0), Logical “0” Output
Voltage (Max)
IOUT, TRI-STATE Output
Current (Max)
ISOURCE, Output Source
Current (Min)
VCC=4.75V
IOUT=−360 µA
IOUT=−10 µA
VCC=4.75V
IOUT=1.6 mA
VOUT=0V
VOUT=5V
VOUT=0V
ISINK, Output Sink Current (Min)
ICC, Supply Current (Max)
ADC0831, ADC0834,
VOUT=VCC
ADC0838
ADC0832
Includes Ladder
Current
CIWM Devices
Typ
(Note 12)
Tested
Limit
(Note 13)
Design
Limit
(Note 14)
−0.2
−1
+0.2
+1
2.0
0.8
0.005
1
−0.005
−1
−0.1
0.1
−14
16
0.9
2.3
2.4
4.5
0.4
−3
3
−6.5
8.0
2.5
6.5
BCV, CCV, CCWM, BCN
and CCN Devices
Typ
Tested
Design
(Note 12)
Limit
Limit
(Note 13) (Note 14)
−0.2
−1
+0.2
+1
0.005
−0.005
2.0
0.8
1
−1
2.0
0.8
1
−1
−0.1
0.1
−14
16
0.9
2.3
2.4
4.5
0.4
−3
+3
−7.5
9.0
2.5
6.5
2.4
4.5
0.4
−3
+3
−6.5
8.0
2.5
6.5
Units
µA
µA
V
V
µA
µA
V
V
V
µA
µA
mA
mA
mA
mA
AC Characteristics
The following specifications apply for VCC = 5V, tr = tf = 20 ns and 25˚C unless otherwise specified.
Typ Tested
Parameter
Conditions
(Note 12)
Limit
(Note 13)
fCLK, Clock Frequency
Min
Max
10
tC, Conversion Time
Clock Duty Cycle
Not including MUX Addressing Time
Min
8
(Note 10)
Max
tSET-UP, CS Falling Edge or
Data Input Valid to CLK
Rising Edge
tHOLD, Data Input Valid
after CLK Rising Edge
Design
Limit
(Note 14)
400
40
60
250
90
Limit
Units
kHz
kHz
1/fCLK
%
%
ns
ns
5 www.national.com
5 Page 
ADC0838 Functional Block Diagram
11 www.national.com
11 Page | ||
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| PDF Descargar | [ Datasheet AD-C0838CCN.PDF ] | |
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