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ADC128S052CIMTX/NOPB
Texas Instruments
IC ADC 12BIT SAR 16TSSOP
22021 Pcs New Original In Stock
12 Bit Analog to Digital Converter 8 Input 1 SAR 16-TSSOP
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5.0 / 5.0
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ADC128S052CIMTX/NOPB
Product Overview
1373933
DiGi Electronics Part Number
ADC128S052CIMTX/NOPB-DGManufacturer
Texas Instruments
ADC128S052CIMTX/NOPB
Description
IC ADC 12BIT SAR 16TSSOPInventory
22021 Pcs New Original In Stock
12 Bit Analog to Digital Converter 8 Input 1 SAR 16-TSSOP
Quantity
Minimum 1
Minimum 1
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ADC128S052CIMTX/NOPB Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Number of Bits
12
Sampling Rate (Per Second)
500k
Number of Inputs
8
Input Type
Single Ended
Data Interface
SPI, DSP
Configuration
MUX-S/H-ADC
Ratio - S/H:ADC
1:1
Number of A/D Converters
1
Architecture
SAR
Reference Type
Supply
Voltage - Supply, Analog
2.7V ~ 5.25V
Voltage - Supply, Digital
2.7V ~ 5.25V
Features
-
Operating Temperature
-40°C ~ 105°C
Package / Case
16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package
16-TSSOP
Mounting Type
Surface Mount
Base Product Number
ADC128S052
Datasheet & Documents
Manufacturer Product Page
ADC128S052CIMTX/NOPB Specifications
HTML Datasheet
ADC128S052CIMTX/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
296-41183-2
ADC128S052CIMTX/NOPB-DG
296-41183-1
296-41183-6
Standard Package
2,500
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
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Frequently Asked Questions (FAQ)
What are the key design risks when using the ADC128S052CIMTX/NOPB in a mixed-signal PCB layout with high-speed digital lines nearby, and how can I mitigate crosstalk and ground bounce?
The ADC128S052CIMTX/NOPB is sensitive to digital noise due to its shared supply rails (2.7V–5.25V analog and digital) and SPI interface. A major risk is coupling high-frequency digital return currents into the analog ground plane, which can degrade SNR and introduce code jitter. To mitigate this, use a solid ground plane with careful partitioning—route digital signals away from analog inputs and the reference node. Place a 0.1µF ceramic capacitor directly at the VDDA pin and isolate the analog supply with a ferrite bead if using a shared regulator. Avoid routing SPI clock lines parallel to analog input traces; instead, use guard rings or ground shielding. These steps are critical to maintaining the ADC128S052CIMTX/NOPB’s 12-bit accuracy in noisy environments.
Can the ADC128S052CIMTX/NOPB safely replace the older ADC128S022 in an existing 3.3V industrial sensor design, and what timing or interface changes must be considered?
While both the ADC128S052CIMTX/NOPB and ADC128S022 are 12-bit SAR ADCs with 8 single-ended inputs and SPI interfaces, the ADC128S052CIMTX/NOPB supports a higher maximum sampling rate (500 kSPS vs. 200 kSPS), which may affect SPI timing requirements. Ensure your microcontroller can support the shorter acquisition and conversion times—verify setup/hold times for SCLK and CS signals in your current design. Also, confirm that the reference voltage (tied to VDD) remains stable under faster switching loads. The pinout is identical, so physical replacement is straightforward, but firmware may need updates to accommodate faster data transfer rates and potential pipeline delays when using the ADC128S052CIMTX/NOPB at full speed.
How does the internal reference of the ADC128S052CIMTX/NOPB impact measurement accuracy in battery-powered applications where supply voltage varies between 3.0V and 4.2V, and should I use an external reference instead?
The ADC128S052CIMTX/NOPB uses the supply voltage (VDD) as its reference, meaning any ripple or drift in the supply directly affects conversion accuracy—this is a critical limitation in battery-powered systems where VDD decays over time. For example, a 3.3V nominal supply dropping to 3.0V can introduce up to 9% gain error in worst-case scenarios. If your application requires ±10mV accuracy across the battery life, consider adding a low-noise, precision external reference like the REF3025 (2.5V, ±0.2%) and buffer it with a low-offset op-amp. However, this increases cost and board space. For less stringent applications (e.g., threshold detection), the internal reference of the ADC128S052CIMTX/NOPB may suffice with proper supply filtering and periodic calibration.
What are the thermal and long-term reliability concerns when operating the ADC128S052CIMTX/NOPB near its maximum junction temperature of 105°C in an enclosed automotive sensor module?
Operating the ADC128S052CIMTX/NOPB continuously at or near 105°C accelerates electromigration and increases the risk of parametric drift, especially in offset and gain error, which can exceed datasheet specs over time. In enclosed automotive environments with poor airflow, thermal cycling can also stress the 16-TSSOP package solder joints. To improve reliability, ensure adequate copper pour under the package for heat dissipation and avoid placing heat-generating components nearby. Monitor junction temperature using the thermal resistance (θJA ≈ 90°C/W) and consider derating the sampling rate if self-heating is significant. For mission-critical systems, perform accelerated life testing or select a higher-grade automotive-qualified ADC if long-term stability is paramount.
Is the ADC128S052CIMTX/NOPB a suitable drop-in replacement for the Analog Devices AD7091R-8 in a multi-channel data logging system, and what firmware or hardware adjustments are needed?
The ADC128S052CIMTX/NOPB and AD7091R-8 are both 12-bit, 8-channel SAR ADCs with SPI interfaces, but they differ in key operational details. The AD7091R-8 has an internal reference and supports up to 1 MSPS, while the ADC128S052CIMTX/NOPB relies on VDD as reference and runs at 500 kSPS. As a drop-in replacement, you must verify that your system can tolerate the lower speed and supply-dependent reference. Additionally, the ADC128S052CIMTX/NOPB requires explicit channel addressing via SPI commands, whereas the AD7091R-8 uses a simpler auto-increment mode. Firmware will need updates to manage channel selection and timing. Also, ensure your analog front-end can drive the ADC128S052CIMTX/NOPB’s input capacitance (typically 10–15 pF) within the acquisition window to avoid sampling errors.
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ADC128S052CIMTX/NOPB CAD Models
Texas Instruments ADC128S052CIMTX/NOPB PCB symbols & footprints
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