|Category||Data Conversion => ADC (Analog to Digital Converters)|
|Description||ADC0808 - 8-bit Microprocessor Compatible A/D Converters With 8-Channel Multiplexer, Package: Plcc, Pin Nb=28|
|Company||National Semiconductor Corporation|
|Datasheet||Download ADC0808 datasheet
|Cross ref.||Similar parts: AD9481, M58990P, MAX118|
The ADC0808, ADC0809 data acquisition component is a monolithic CMOS device with an 8-bit analog-to-digital converter, 8-channel multiplexer and microprocessor compatible control logic. The 8-bit A/D converter uses successive approximation as the conversion technique. The converter features a high impedance chopper stabilized comparator, a 256R voltage divider with analog switch tree and a successive approximation register. The 8-channel multiplexer can directly 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, excellent long-term accuracy and repeatability, and consumes minimal power. These features make this device ideally suited to applications from process and machine control to consumer and automotive applications. For 16-channel multiplexer with common output (sample/hold port) see ADC0816 data sheet. (See AN-247 for more information.)Features
n Easy interface to all microprocessors n Operates ratiometrically or with 5 VDC or analog span adjusted voltage reference n No zero or full-scale adjust required n 8-channel multiplexer with address logic to 5V input range with single 5V power supply n Outputs meet TTL voltage level specifications n ADC0808 equivalent n ADC0809 equivalent to MM74C949-1Resolution Total Unadjusted Error Single Supply Low Power Conversion Time 8 Bits
Dual-In-Line Package Molded Chip Carrier Package
TEMPERATURE RANGE Error ADC0809CCN N28A Molded DIP ADC0809CCV V28A Molded Chip Carrier
Dual-In-Line Package (plastic) Molded Chip Carrier Package Vapor Phase (60 seconds) Infrared (15 seconds) ESD Susceptibility (Note 8)
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 Except Control Inputs Voltage at Control Inputs Storage Temperature Range Package Dissipation TA =25°C Lead Temp. (Soldering, 10 seconds) 875 mW (START, OE, CLOCK, ALE, ADD A, ADD B, ADD to (VCC+0.3V)
Converter Specifications: VCC =5 VDC =VREF+, VREF(-) =GND, TMINTATMAX and fCLK =640 kHz unless otherwise stated. Symbol ADC0808 Total Unadjusted Error (Note 5) ADC0809 Total Unadjusted Error (Note 5) Input Resistance Analog Input Voltage Range VREF(+) Voltage, Top of Ladder Voltage, Center of Ladder to 70°C TMIN to TMAX From Ref(+) to Ref(-) (Note 4) V(+) or V(-) Measured at Ref(+) 1.0 GND-0.10 VCC VCC/2+0.1 25°C TMIN to TMAX Parameter Conditions Min Typ Max Units LSB k VDC VVoltage, Bottom of Ladder Comparator Input Current
Digital Levels and DC Specifications: ADC0808CCV, ADC0809CCN and 4.75VCC5.25V, -40°CTA+85°C unless otherwise noted Symbol ANALOG MULTIPLEXER IOFF(+) OFF Channel Leakage Current VCC =5V, VIN TA =25°C TMIN to TMAX IOFF(-) OFF Channel Leakage Current VCC =5V, VIN TA =25°C TMIN to TMAX CONTROL INPUTS IIN(1) IIN(0) ICC Logical "1" Input Voltage Logical "0" Input Voltage Logical "1" Input Current (The Control Inputs) Logical "0" Input Current (The Control Inputs) Supply Current fCLK =640 kHz
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