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ADS8555SPM
Texas Instruments
IC ADC 16BIT SAR 64LQFP
1195 Pcs New Original In Stock
16 Bit Analog to Digital Converter 6 Input 1 SAR 64-LQFP (10x10)
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ADS8555SPM
Product Overview
1403913
DiGi Electronics Part Number
ADS8555SPM-DGManufacturer
Texas Instruments
ADS8555SPM
Description
IC ADC 16BIT SAR 64LQFPInventory
1195 Pcs New Original In Stock
16 Bit Analog to Digital Converter 6 Input 1 SAR 64-LQFP (10x10)
Quantity
Minimum 1
Minimum 1
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ADS8555SPM Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Tray
Series
-
Product Status
Active
Number of Bits
16
Sampling Rate (Per Second)
630k
Number of Inputs
6
Input Type
Single Ended
Data Interface
SPI, Parallel
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
2.7V ~ 3.6V, 5V
Features
Simultaneous Sampling
Operating Temperature
-40°C ~ 125°C
Package / Case
64-LQFP
Supplier Device Package
64-LQFP (10x10)
Mounting Type
Surface Mount
Base Product Number
ADS8555
Datasheet & Documents
HTML Datasheet
ADS8555SPM-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
2156-ADS8555SPM
296-28206
-ADS8555SPM-NDR
TEXTISADS8555SPM
3301-ADS8555SPM
-296-28206-DG
Standard Package
100
Alternative Parts
View DetailsPART 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
每次購買都能看到用心的包裝設計，安心十足，快遞速度也令人滿意。
de desembre 02, 2025
DiGi Electronics has a proven track record of providing dependable equipment that exceeds our expectations.
de desembre 02, 2025
The smooth and quick return process demonstrated their commitment to customer satisfaction, making me feel valued.
de desembre 02, 2025
They keep their inventory well-organized, ensuring quick response times.
de desembre 02, 2025
The earnest support after my purchase made me feel valued and well taken care of.
de desembre 02, 2025
DiGi Electronics’ commitment to punctuality demonstrates their professionalism.
de desembre 02, 2025
Efficient dispatch process contributed to the rapid shipping.
de desembre 02, 2025
Customer service was very responsive, and they expedited my shipping request without any hassle.
de desembre 02, 2025
Great packaging quality that matches the high standards of their products.
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Frequently Asked Questions (FAQ)
What are the critical design considerations when replacing the ADS8555SPM with the ADS8556IPM in an existing 16-bit data acquisition system, and how might simultaneous sampling behavior differ between these two TI ADCs?
While the ADS8556IPM is listed as a substitute for the ADS8555SPM, it features eight analog inputs instead of six and supports a slightly higher throughput rate. However, both share the same 16-bit SAR architecture, external/internal reference support, and SPI/parallel interface. The key risk in substitution lies in pin compatibility: the ADS8556IPM uses a different pinout despite the same 64-LQFP package, which may require PCB layout changes. Additionally, although both claim 'simultaneous sampling,' the ADS8556IPM samples all eight channels at once, whereas the ADS8555SPM samples six—this affects timing alignment in multi-sensor systems. Verify your channel count needs and revalidate timing budgets before swapping to avoid signal skew or firmware incompatibility.
How should I manage power sequencing and decoupling when integrating the ADS8555SPM into a mixed-voltage system with both 3.3V digital logic and 5V analog front-end components to prevent latch-up or ADC errors?
The ADS8555SPM accepts dual supply rails—2.7V to 3.6V (or 5V) for digital I/O and 5V for the analog section—making power sequencing critical. To avoid latch-up or erroneous conversions, ensure the analog 5V supply (AVDD) is stable before or simultaneously with the digital supply (DVDD). Use low-ESR ceramic capacitors (e.g., 100nF + 10µF) near each supply pin, placed as close as possible to the package. Since the digital interface tolerates 5V logic even when DVDD is 3.3V, level translation may not be needed, but verify signal rise times to prevent overshoot. A soft-start circuit or supervisor IC can enforce proper sequencing, especially in systems where 3.3V rails power up before 5V, reducing the risk of reverse biasing internal ESD structures.
Can the ADS8555SPM reliably operate in high-vibration industrial environments near motors or actuators, and what PCB layout practices minimize noise coupling into the 16-bit SAR ADC’s input channels?
Yes, the ADS8555SPM can operate in high-vibration environments due to its robust LQFP package and -40°C to 125°C operating range, but mechanical stress on solder joints over time may affect long-term reliability. To mitigate noise from nearby motors or switching circuits, maintain a solid ground plane beneath the ADC, separate analog and digital grounds (tied at a single point near the ADC), and route high-speed digital lines away from analog input traces. Use shielded twisted-pair cabling for sensor inputs and place anti-aliasing filters (RC networks) as close to the ADC pins as possible. Additionally, avoid running clock or SPI lines parallel to analog inputs, as coupling can degrade ENOB—especially critical when targeting full 16-bit accuracy in electrically noisy settings.
What are the risks of using the internal reference of the ADS8555SPM versus an external precision reference like the REF5050 in a battery-powered measurement system requiring long-term stability and low drift?
The ADS8555SPM includes an internal 2.5V reference, but its initial accuracy (±0.1%) and temperature drift (typically 10 ppm/°C) may not suffice for high-precision, long-duration measurements in variable environments. In battery-powered systems where thermal cycling occurs, an external reference like the REF5050 (±0.05%, 3 ppm/°C drift) significantly improves measurement consistency over time. The trade-off is increased BOM cost, board space, and slight power overhead (~1 mA). If your application demands better than 14–15 effective bits over temperature, use the external reference mode of the ADS8555SPM and buffer it with a low-noise op-amp. Bypass the REF5050 with a 10µF tantalum and 100nF ceramic capacitor to maintain stability under dynamic load conditions.
Is it safe to operate the ADS8555SPM at its maximum sampling rate of 630 kSPS continuously in a 125°C ambient environment, and how does self-heating impact linearity and thermal shutdown risk?
Operating the ADS8555SPM at 630 kSPS continuously near its 125°C limit is feasible but introduces thermal risks due to self-heating from internal switching currents. While the device is rated for -40°C to 125°C junction temperature, sustained high-speed conversion increases power dissipation, potentially pushing the die beyond safe limits without adequate thermal relief. This can degrade integral nonlinearity (INL) and increase offset drift, reducing effective resolution. To mitigate this, ensure sufficient copper pour under the LQFP package (use thermal vias to inner layers or bottom plane), avoid enclosing the ADC in dense component clusters, and consider derating the sampling rate if ambient temperatures exceed 105°C. Monitor junction temperature using TI’s thermal resistance model (θJA ≈ 38°C/W) and add airflow or heatsinking if necessary to preserve 16-bit performance.
Quality Assurance (QC)
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ADS8555SPM CAD Models
Texas Instruments ADS8555SPM PCB symbols & footprints
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