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ADC0803LCN
Texas Instruments
IC ADC 8BIT SAR 20DIP
2324 Pcs New Original In Stock
8 Bit Analog to Digital Converter 1 Input 1 SAR 20-PDIP
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Minimum 1
5.0 / 5.0
- (411 Ratings)
ADC0803LCN
Product Overview
1379233
DiGi Electronics Part Number
ADC0803LCN-DGManufacturer
Texas Instruments
ADC0803LCN
Description
IC ADC 8BIT SAR 20DIPInventory
2324 Pcs New Original In Stock
8 Bit Analog to Digital Converter 1 Input 1 SAR 20-PDIP
Quantity
Minimum 1
Minimum 1
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ADC0803LCN Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
-
Series
-
Product Status
Obsolete
Number of Bits
8
Sampling Rate (Per Second)
10k
Number of Inputs
1
Input Type
Differential
Data Interface
Parallel
Configuration
ADC
Ratio - S/H:ADC
-
Number of A/D Converters
1
Architecture
SAR
Reference Type
External, Supply
Voltage - Supply, Analog
4.5V ~ 6.3V
Voltage - Supply, Digital
4.5V ~ 6.3V
Features
-
Operating Temperature
-40°C ~ 85°C
Package / Case
20-DIP (0.300", 7.62mm)
Supplier Device Package
20-PDIP
Mounting Type
Through Hole
Base Product Number
ADC0803
Datasheet & Documents
HTML Datasheet
ADC0803LCN-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
ADC0803LCN-DG
-296-36355-5-DG
-296-36355-5
*ADC0803LCN
296-36355-5
-ADC0803LCN-DG
Standard Package
18
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
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de desembre 02, 2025
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Frequently Asked Questions (FAQ)
Can the ADC0803LCN be used in a modern low-voltage 3.3V microcontroller system, and what are the interface risks?
The ADC0803LCN requires a 4.5V to 6.3V analog and digital supply, making it incompatible with direct 3.3V logic systems. Using it with a 3.3V microcontroller introduces signal level mismatch risks, particularly on the parallel data output lines. To integrate safely, use level translators (e.g., TXB0108) or a buffer with 5V-tolerant outputs. Additionally, ensure the 3.3V MCU can drive ADC0803LCN's digital input control lines (e.g., WR, CS) by verifying VIH/VIL thresholds in the datasheet. Operating at 5V also increases power dissipation in portable designs—consider this trade-off when selecting bypass capacitors and heat management in high-temperature environments.
What are the key design-in risks when replacing the obsolete ADC0803LCN with a modern 8-bit ADC like the ADS7884?
Replacing the ADC0803LCN with the ADS7884 introduces several interface and architectural mismatches. The ADC0803LCN uses a parallel interface and SAR with differential input, while the ADS7884 uses SPI and single-ended input. This requires significant PCB redesign and microcontroller firmware changes. Additionally, the ADC0803LCN's self-clocking R-C oscillator (tied to CLKIN/CLKR) demands precise external component selection for stable sampling; modern replacements may require crystal or external clock sources. Always validate timing margins for conversion start and data readout—mishandling can result in corrupted samples. Retain ADC0803LCN only if through-hole assembly and legacy system compatibility are priorities.
How does the external reference input on the ADC0803LCN affect accuracy in noisy industrial environments?
The ADC0803LCN uses an external reference voltage tied to the VREF/2 pin, which directly sets the full-scale input range. In noisy industrial settings, poor reference stability or supply ripple can significantly degrade conversion accuracy. For example, a 5V supply used as VREF/2 implies a 10V full-scale range, but any noise on VREF propagates directly to output error. To mitigate this, use a low-noise precision reference (e.g., LM4040) regulated and filtered with a 0.1µF ceramic capacitor close to the VREF/2 pin. Also, ensure high-impedance analog inputs are shielded and routed away from digital traces to avoid coupling—especially critical in differential mode where CMRR performance depends on balanced layout.
Is the ADC0803LCN suitable for battery-powered applications given its 10ksps sampling rate and power requirements?
The ADC0803LCN is not ideal for battery-powered designs due to its static power draw and lack of power-down modes. It draws approximately 15mA continuously at 5V, consuming ~75mW—too high for long-term battery operation. At 10ksps, it also samples faster than needed for many low-frequency sensor signals (e.g., temperature), wasting energy. If using ADC0803LCN in such a system, gate its power using a MOSFET controlled by the MCU to limit on-time. Consider migrating to modern alternatives like the ADC081S021 (SPI, 50ksps, 0.25mW) when redesign is feasible. Prioritize the ADC0803LCN only in legacy systems where through-hole assembly and identical timing behavior are critical.
What are the reliability concerns when using the obsolete and RoHS non-compliant ADC0803LCN in new designs for industrial equipment?
Using the obsolete ADC0803LCN in new designs poses long-term supply and reliability risks. With no active manufacturing, sourcing depends on limited stock (e.g., 2303 units available), increasing vulnerability to counterfeit parts. Its RoHS non-compliance may violate environmental regulations in EU or medical markets. The 20-PDIP package also limits board density and automated assembly compared to modern SMD ADCs. For industrial equipment with 10+ year lifecycles, this creates obsolescence management burdens. If you must use ADC0803LCN, secure long-term stock and validate second-source authenticity. Design with socketing to allow future substitution, and document the risk in your bill-of-materials for audit compliance.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
ADC0803LCN CAD Models
Texas Instruments ADC0803LCN PCB symbols & footprints
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