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ADS8508IBDWR
Texas Instruments
IC ADC 12BIT SAR 20SOIC
2381 Pcs New Original In Stock
12 Bit Analog to Digital Converter 1 Input 1 SAR 20-SOIC
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5.0 / 5.0
- (172 Ratings)
ADS8508IBDWR
Product Overview
1236401
DiGi Electronics Part Number
ADS8508IBDWR-DGManufacturer
Texas Instruments
ADS8508IBDWR
Description
IC ADC 12BIT SAR 20SOICInventory
2381 Pcs New Original In Stock
12 Bit Analog to Digital Converter 1 Input 1 SAR 20-SOIC
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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ADS8508IBDWR Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Number of Bits
12
Sampling Rate (Per Second)
250k
Number of Inputs
1
Input Type
Single Ended
Data Interface
SPI
Configuration
S/H-ADC
Ratio - S/H:ADC
1:1
Number of A/D Converters
1
Architecture
SAR
Reference Type
External, Internal
Voltage - Supply, Analog
5V
Voltage - Supply, Digital
5V
Features
-
Operating Temperature
-40°C ~ 85°C
Package / Case
20-SOIC (0.295", 7.50mm Width)
Supplier Device Package
20-SOIC
Mounting Type
Surface Mount
Base Product Number
ADS8508
Datasheet & Documents
HTML Datasheet
ADS8508IBDWR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
TEXTISADS8508IBDWR
2156-ADS8508IBDWR
Standard Package
2,000
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
這次購買讓我體驗到快速的運輸速度與平價的價格，真的很棒的購物經驗！
de desembre 02, 2025
価格面で大変お得感があり、頻繁に利用しています。
de desembre 02, 2025
いつも丁寧な対応と迅速な配送に感謝しています。
de desembre 02, 2025
I love how their packaging is both environmentally conscious and high in quality.
de desembre 02, 2025
Support staff is always courteous and helpful in resolving concerns.
de desembre 02, 2025
Their eco-friendly packaging shows genuine concern for the environment—well done, DiGi!
de desembre 02, 2025
Their commitment to rapid response times keeps my business running smoothly.
de desembre 02, 2025
They shipped my items rapidly, and their after-sales responses were thorough and timely.
de desembre 02, 2025
Delivery was efficient, and the eco packaging was a sustainable choice.
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Frequently Asked Questions (FAQ)
Can the ADS8508IBDWR be safely replaced with the ADS8507IBDWR in a 5V single-supply industrial data acquisition system without redesigning the analog front end?
Replacing the ADS8508IBDWR with the ADS8507IBDWR is not recommended without careful evaluation. While both are 12-bit SAR ADCs in 20-SOIC packages with SPI interfaces, the ADS8507 has a lower sampling rate (200 kSPS vs. 250 kSPS) and different internal reference characteristics. More critically, the ADS8507 requires an external reference, whereas the ADS8508IBDWR supports both internal and external references. If your design relies on the internal reference of the ADS8508IBDWR for simplicity and cost savings, switching to the ADS8507IBDWR would necessitate adding an external precision voltage reference and potentially modifying the PCB layout, introducing noise and calibration risks. Always validate timing margins and reference stability in your specific application before substitution.
What are the key layout and grounding considerations when integrating the ADS8508IBDWR into a mixed-signal PCB to minimize noise and ensure 12-bit accuracy?
To maintain 12-bit performance with the ADS8508IBDWR, strict analog and digital separation is essential. Use a solid ground plane but partition analog and digital sections, connecting them at a single point near the ADC’s ground pin. Route the analog input trace away from digital signals (especially SCLK and SDATA) and use guard rings if necessary. Place the bypass capacitors (100 nF ceramic + 10 µF tantalum) as close as possible to the AVDD and DVDD pins. Since the ADS8508IBDWR shares a common 5V supply for analog and digital domains, ensure that digital return currents do not flow through the analog ground path. Also, avoid running high-speed digital lines underneath the device. These practices mitigate coupling noise that could degrade effective number of bits (ENOB) in real-world conditions.
Is the ADS8508IBDWR suitable for battery-powered field sensors operating at –30°C, and what derating or compensation strategies should be applied?
Yes, the ADS8508IBDWR is rated for –40°C to +85°C operation, making it suitable for –30°C field deployments. However, at low temperatures, internal reference drift and capacitor settling time in the SAR architecture may degrade linearity. If using the internal reference, monitor long-term drift over temperature—TI specifies ±2 ppm/°C typical, but system-level calibration may be needed for precision applications. Additionally, ensure that input signal source impedance remains stable across temperature, as high source impedance combined with cold-start conditions can increase acquisition time errors. For critical measurements, consider periodic self-calibration or use an external precision reference with better tempco. Always validate performance across the full thermal cycle during prototyping.
How does the ADS8508IBDWR compare to the Analog Devices AD7091R-4 in terms of power efficiency, interface flexibility, and drop-in compatibility for a 5V industrial control module?
The ADS8508IBDWR and AD7091R-4 differ significantly in integration and use case. The ADS8508IBDWR is a single-channel, 12-bit SAR ADC with SPI interface and internal/external reference options, ideal for low-channel-count, cost-sensitive systems. In contrast, the AD7091R-4 is a quad-channel, 12-bit ADC with both SPI and parallel interfaces and lower power per channel. While not pin-compatible, the AD7091R-4 offers better channel density and faster throughput per channel (1 MSPS aggregate), but at higher complexity. For a single-input 5V system where board space and BOM cost are critical, the ADS8508IBDWR is often preferable. However, if future scalability to multiple sensors is anticipated, the AD7091R-4 provides a more flexible path—though it requires a redesign of the digital interface and power management.
What failure modes should I anticipate when using the ADS8508IBDWR in a high-vibration automotive environment near its –40°C lower temperature limit?
In high-vibration automotive environments operating near –40°C, the ADS8508IBDWR may face mechanical stress on the 20-SOIC package leads and solder joints, potentially leading to intermittent connections or early fatigue failure. Additionally, cold temperatures increase the risk of tin whisker growth on non-RoHS-compliant board finishes, though the ADS8508IBDWR itself is RoHS3-compliant. Thermal cycling can exacerbate CTE mismatches between the SOIC package and PCB, risking cracked joints. Mitigate these risks by using conformal coating to dampen vibration effects, selecting a PCB with high Tg material, and implementing underfill if reliability testing shows joint weakness. Also, ensure that input signal conditioning components (e.g., op-amps, filters) are equally rated for the full temperature and mechanical environment—ADC performance is only as robust as the weakest link in the signal chain.
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.
ADS8508IBDWR CAD Models
Texas Instruments ADS8508IBDWR PCB symbols & footprints
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