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ADC0800 Datasheet

ADC0800 8-Bit A/D Converter

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ADC0800 8-Bit A D Converter
General Description
The ADC0800 is an 8-bit monolithic A D converter using P-
channel ion-implanted MOS technology It contains a high
input impedance comparator 256 series resistors and ana-
log switches control logic and output latches Conversion is
performed using a successive approximation technique
where the unknown analog voltage is compared to the re-
sistor tie points using analog switches When the appropri-
ate tie point voltage matches the unknown voltage conver-
sion is complete and the digital outputs contain an 8-bit
complementary binary word corresponding to the unknown
The binary output is TRI-STATE to permit bussing on com-
mon data lines
The ADC0800PD is specified over b55 C to a125 C and
the ADC0800PCD is specified over 0 C to 70 C
Block Diagram
Features
Y Low cost
Y g5V 10V input ranges
Y No missing codes
Y Ratiometric conversion
Y TRI-STATE outputs
Y Fast
Y Contains output latches
Y TTL compatible
Y Supply voltages
Y Resolution
Y Linearity
Y Conversion speed
Y Clock range
February 1995
TCe50 ms
5 VDC and b12 VDC
8 bits
g1 LSB
40 clock periods
50 to 800 kHz
(00000000e afull-scale)
TRI-STATE is a registered trademark of National Semiconductor Corp
C1995 National Semiconductor Corporation TL H 5670
TL H 5670 – 1
RRD-B30M115 Printed in U S A


National Semiconductor Electronic Components Datasheet

ADC0800 Datasheet

ADC0800 8-Bit A/D Converter

No Preview Available !

Absolute Maximum Ratings (Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage (VDD)
Supply Voltage (VGG)
Voltage at Any Input
Input Current at Any Pin (Note 2)
VSSb22V
VSSb22V
VSSa0 3V to VSSb22V
5 mA
Package Input Current (Note 2)
20 mA
Electrical Characteristics
Power Dissipation (Note 3)
ESD Susceptibility (Note 4)
Storage Temperature
Lead Temperature (Soldering 10 sec )
875 mW
500V
150 C
300 C
Operating Ratings (Note 1)
Temperature Range
ADC0800PD
ADC0800PCD
TMIN s TA s TMAX
b55 C s TA s a125 C
0 C s TA s a70 C
These specifications apply for VSSe5 0 VDC VGGeb12 0 VDC VDDe0 VDC a reference voltage of 10 000 VDC across the
on-chip R-network (VR-NETWORK TOPe5 000 VDC and VR-NETWORK BOTTOMeb5 000 VDC) and a clock frequency of 800
kHz For all tests a 475X resistor is used from pin 5 to VR-NETWORK BOTTOM e b5 VDC Unless otherwise noted these
specifications apply over an ambient temperature range of b55 C to a125 C for the ADC0800PD and 0 C to a70 C for the
ADC0800PCD
Parameter
Conditions
Min Typ Max
Units
Non-Linearity
TAe25 C (Note 8)
Over Temperature (Note 8)
g1 LSB
g2 LSB
Differential Non-Linearity
g LSB
Zero Error
g2 LSB
Zero Error Temperature Coefficient
(Note 9)
0 01 % C
Full-Scale Error
g2 LSB
Full-Scale Error Temperature Coefficient (Note 9)
0 01 % C
Input Leakage
1 mA
Logical ‘‘1’’ Input Voltage
Logical ‘‘0’’ Input Voltage
Logical Input Leakage
Logical ‘‘1’’ Output Voltage
Logical ‘‘0’’ Output Voltage
Disabled Output Leakage
Clock Frequency
Clock Pulse Duty Cycle
All Inputs
All Inputs
TAe25 C All Inputs VILe
VSSb10V
All Outputs IOHe100 mA
All Outputs IOLe1 6 mA
TAe25 C All Outputs VOLe
VSS 10V
0 CsTAsa70 C
b55 CsTAsa125 C
VSSb1 0
VGG
24
50
100
40
VSS
VSSb4 2
1
04
2
800
500
60
V
V
mA
V
V
mA
kHz
kHz
%
TRI-STATE Enable Disable Time
1 ms
Start Conversion Pulse
(Note 10)
1 3 Clock
Periods
Power Supply Current
TAe25 C
20 mA
Note 1 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur DC and AC electrical specifications do not apply when operating
the device beyond its specified operating conditions
Note 2 When the input voltage (VIN) at any pin exceeds the power supply rails (VIN k Vb or VIN l Va) the absolute value of current at that pin should be limited
to 5 mA or less The 20 mA package input current limits the number of pins that can exceed the power supply boundaries with a 5 mA current limit to four
Note 3 The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX iJA and the ambient temperature TA The maximum
allowable power dissipation at any temperature is PD e (TJMAX b TA) iJA or the number given in the Absolute Maximum Ratings whichever is lower For this
device TJMAX e 125 C and the typical junction-to-ambient thermal resistance of the ADC0800PD and ADC0800PCD when board mounted is 66 C W
Note 4 Human body model 100 pF discharged through a 1 5 kX resistor
Note 5 Typicals are at 25 C and represent most likely parametric norm
Note 6 Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level)
Note 7 Design limits are guaranteed but not 100% tested These limits are not used to calculate outgoing quality levels
Note 8 Non-linearity specifications are based on best straight line
Note 9 Guaranteed by design only
Note 10 Start conversion pulse duration greater than 3 clock periods will cause conversion errors
2


Part Number ADC0800
Description ADC0800 8-Bit A/D Converter
Maker National Semiconductor
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ADC0800 Datasheet PDF






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