A/D Converters. ADC0808 Datasheet

ADC0808 Converters. Datasheet pdf. Equivalent

ADC0808 Datasheet
Recommendation ADC0808 Datasheet
Part ADC0808
Description 8-Bit uP Compatible A/D Converters
Feature ADC0808; ADC0808/ADC0809 8-Bit μP Compatible A/D Converters with 8-Channel Multiplexer ADC0808/ADC0809 July.
Manufacture National Semiconductor
Datasheet
Download ADC0808 Datasheet




National Semiconductor ADC0808
ADC0808/ADC0809
July 8, 2009
8-Bit μP Compatible A/D Converters with 8-Channel
Multiplexer
General Description
The ADC0808, ADC0809 data acquisition component is a
monolithic CMOS device with an 8-bit analog-to-digital con-
verter, 8-channel multiplexer and microprocessor compatible
control logic. The 8-bit A/D converter uses successive ap-
proximation as the conversion technique. The converter fea-
tures a high impedance chopper stabilized comparator, a
256R voltage divider with analog switch tree and a successive
approximation register. The 8-channel multiplexer can direct-
ly access any of 8-single-ended analog signals.
The device eliminates the need for external zero and full-scale
adjustments. Easy interfacing to microprocessors is provided
by the latched and decoded multiplexer address inputs and
latched TTL TRI-STATE outputs.
The design of the ADC0808, ADC0809 has been optimized
by incorporating the most desirable aspects of several A/D
conversion techniques. The ADC0808, ADC0809 offers high
speed, high accuracy, minimal temperature dependence, ex-
cellent long-term accuracy and repeatability, and consumes
minimal power. These features make this device ideally suit-
ed to applications from process and machine control to con-
sumer and automotive applications. For 16-channel multi-
plexer with common output (sample/hold port) see ADC0816
data sheet. (See AN-247 for more information.)
Features
Easy interface to all microprocessors
Operates ratiometrically or with 5 VDC or analog span
adjusted voltage reference
No zero or full-scale adjust required
8-channel multiplexer with address logic
0V to VCC input range
Outputs meet TTL voltage level specifications
ADC0808 equivalent to MM74C949
ADC0809 equivalent to MM74C949-1
Key Specifications
Resolution
Total Unadjusted Error
Single Supply
Low Power
Conversion Time
8 Bits
±½ LSB and ±1 LSB
5 VDC
15 mW
100 μs
Block Diagram
See Ordering Information
© 2009 National Semiconductor Corporation 5672
567201
www.national.com



National Semiconductor ADC0808
Connection Diagrams
Dual-In-Line Package
Molded Chip Carrier Package
567211
Order Number ADC0808CCN or ADC0809CCN
See NS Package NA28E
Ordering Information
Temperature Range
Package Outline
NA28E Molded DIP
±½ LSB Unadjusted
Error
±1 LSB Unadjusted
ADC0808CCN
ADC0809CCN
567212
Order Number ADC0808CCV or ADC0809CCV
See NS Package V28A
−40°C to +85°C
V28A Molded Chip Carrier
ADC0808CCV
ADC0809CCV
V28A Molded Chip Carrier
(Tape and Reel)
ADC0808CCVX
ADC0809CCVX
www.national.com
2



National Semiconductor ADC0808
Absolute Maximum Ratings
(Notes 2, 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (VCC) (Note 3)
Voltage at Any Pin
6.5V
−0.3V to (VCC
+0.3V)
Except Control Inputs
Voltage at Control Inputs
−0.3V to +15V
(START, OE, CLOCK, ALE, ADD A, ADD B, ADD C)
Storage Temperature Range
−65°C to +150°C
Package Dissipation at TA=25°C
Lead Temp. (Soldering, 10 seconds)
875 mW
Dual-In-Line Package (plastic)
260°C
Molded Chip Carrier Package
Vapor Phase (60 seconds)
215°C
Infrared (15 seconds)
220°C
ESD Susceptibility (Note 8)
400V
Operating Conditions
(Notes 1, 2)
Temperature Range
Range of VCC
TMINTATMAX
−40°CTA+85°C
4.5 VDC to 6.0 VDC
Electrical Characteristics – Converter Specifications
Converter Specifications: VCC=5 VDC=VREF+, VREF(−)=GND, TMINTATMAX and fCLK=640 kHz unless otherwise stated.
Symbol
Parameter
Conditions
Min Typ Max
ADC0808
Total Unadjusted Error
(Note 5)
ADC0809
Total Unadjusted Error
(Note 5)
Input Resistance
25°C
TMIN to TMAX
0°C to 70°C
TMIN to TMAX
From Ref(+) to Ref(−)
±½
±¾
±1
±1¼
1.0 2.5
VREF(+)
Analog Input Voltage Range
Voltage, Top of Ladder
(Note 4) V(+) or V(−)
Measured at Ref(+)
GND − 0.1
VCC
VCC + 0.1
VCC + 0.1
Units
LSB
LSB
LSB
LSB
kΩ
VDC
V
Voltage, Center of Ladder
(VCC/2) − 0.1 VCC/2 (VCC/2) + 0.1 V
VREF(−)
IIN
Voltage, Bottom of Ladder
Comparator Input Current
Measured at Ref(−)
fc=640 kHz, (Note 6)
−0.1
−2
0
±0.5
2
V
μA
Electrical Characteristics – Digital Levels and DC Specifications
Digital Levels and DC Specifications: ADC0808CCN, ADC0808CCV, ADC0809CCN and ADC0809CCV, 4.75VCC5.25V,
−40°CTA+85°C unless otherwise noted
Symbol
Parameter
Conditions
Min
Typ Max
Units
ANALOG MULTIPLEXER
IOFF(+)
OFF Channel Leakage Current
IOFF(−)
OFF Channel Leakage Current
CONTROL INPUTS
VCC=5V, VIN=5V,
TA=25°C
TMIN to TMAX
VCC=5V, VIN=0,
TA=25°C
TMIN to TMAX
10 200
1.0
−200
−1.0
−10
nA
μA
nA
μA
VIN(1)
VIN(0)
Logical “1” Input Voltage
Logical “0” Input Voltage
(VCC − 1.5)
V
1.5 V
3 www.national.com







@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)