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ADS7953SBRHBT
Texas Instruments
IC ADC 12BIT SAR 32VQFN
2169 Pcs New Original In Stock
12 Bit Analog to Digital Converter 16 Input 1 SAR 32-VQFN (5x5)
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5.0 / 5.0
- (504 Ratings)
ADS7953SBRHBT
Product Overview
1251214
DiGi Electronics Part Number
ADS7953SBRHBT-DGManufacturer
Texas Instruments
ADS7953SBRHBT
Description
IC ADC 12BIT SAR 32VQFNInventory
2169 Pcs New Original In Stock
12 Bit Analog to Digital Converter 16 Input 1 SAR 32-VQFN (5x5)
Quantity
Minimum 1
Minimum 1
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ADS7953SBRHBT Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Cut Tape (CT) & Digi-Reel®
Series
microPOWER™
Product Status
Active
Number of Bits
12
Sampling Rate (Per Second)
1M
Number of Inputs
16
Input Type
Single Ended
Data Interface
SPI
Configuration
MUX-S/H-ADC
Ratio - S/H:ADC
1:1
Number of A/D Converters
1
Architecture
SAR
Reference Type
External
Voltage - Supply, Analog
2.7V ~ 5.25V
Voltage - Supply, Digital
1.7V ~ 5.25V
Features
-
Operating Temperature
-40°C ~ 125°C
Package / Case
32-VFQFN Exposed Pad
Supplier Device Package
32-VQFN (5x5)
Mounting Type
Surface Mount
Base Product Number
ADS7953
Datasheet & Documents
HTML Datasheet
ADS7953SBRHBT-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
296-25844-2
296-25844-1
-296-25844-1-DG
-ADS7953SBRHBT-NDR
296-25844-6
Standard Package
250
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
價格公開透明，沒有任何 hidden charges，讓我感到非常可信賴。
de desembre 02, 2025
DiGi Electronics' products are a perfect combo of affordability and reliability—highly recommended.
de desembre 02, 2025
Their professionalism made all my queries feel valued and addressed promptly.
de desembre 02, 2025
We are impressed by the reliability of their stock levels and after-sales support.
de desembre 02, 2025
Always impressed by their punctuality—my orders arrive right when promised.
de desembre 02, 2025
Their attention to support and tracking detail sets them apart.
de desembre 02, 2025
I appreciate the effort to reduce environmental impact through thoughtful packaging choices.
de desembre 02, 2025
Received my order rapidly, and their team was very quick to address any post-purchase concerns.
de desembre 02, 2025
Their tracking notifications were detailed and timely, giving peace of mind throughout delivery.
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Frequently Asked Questions (FAQ)
How does the ADS7953SBRHBT perform in high-channel-count data acquisition systems where power dissipation and crosstalk are critical design concerns?
In high-channel-count applications, the ADS7953SBRHBT offers a favorable balance of low power consumption (microPOWER™ technology) and 16-channel integration, but careful attention must be paid to channel-to-channel crosstalk due to its internal multiplexer switching. At maximum sampling rates (1MSPS), incomplete settling between channels can introduce errors, especially with high-source impedance. To mitigate this, use low-impedance drive buffers (e.g., OPA363) and ensure the analog input settling time accounts for multiplexer switching transient spikes. Additionally, maintaining a solid ground plane and minimizing trace capacitance reduces crosstalk. For thermally sensitive designs, the 32-VQFN (5x5) package’s exposed pad must be properly soldered to a thermal pad connected to ground to enhance heat dissipation and signal integrity.
Can the ADS7953SBRHBT replace the MAX11341B in a 3V-powered industrial sensor module, and what design adjustments are required?
While both the ADS7953SBRHBT and MAX11341B are 12-bit, 16-channel SAR ADCs, directly replacing the MAX11341B with the ADS7953SBRHBT requires evaluating key interface and performance differences. The ADS7953SBRHBT requires an external reference, whereas the MAX11341B has an internal 2.048V reference, so a stable external reference like the REF5025 must be added to maintain accuracy. Additionally, the SPI timing must be verified—the ADS7953SBRHBT has specific tDATA and tCONV requirements that may necessitate adjusting the host MCU’s clock polarity and latency. Also, the MAX11341B has lower input current leakage, so if the system uses high-impedance sensors, consider adding input protection and buffering to prevent DC errors in the ADS7953SBRHBT circuit.
What are the reliability risks when using the ADS7953SBRHBT in automotive under-the-hood applications exposed to wide temperature swings and EMI?
The ADS7953SBRHBT is rated for -40°C to 125°C operation, making it suitable for harsh environments, but real-world automotive use requires additional precautions. The SAR architecture is inherently less susceptible to EMI than delta-sigma ADCs, still, high-frequency noise on analog lines can alias into the signal band due to multiplexer switching. To improve reliability, implement local filtering (RC network with f_c > 10× signal bandwidth) at each input, and use a clean, regulated LDO (e.g., TPS7A47) for the AVDD supply. The 32-VQFN package is MSL-3 rated, so moisture absorption during assembly must be controlled—reflow within 168 hours of exposure or bake per JEDEC standards. For long-term operation, avoid sustained use beyond 125°C junction temperature to prevent accelerated electromigration.
How does the external reference requirement of the ADS7953SBRHBT affect system accuracy in portable battery-powered data loggers?
The ADS7953SBRHBT’s reliance on an external reference introduces both flexibility and risk in battery-powered systems. As the battery voltage drops over time, the reference voltage (e.g., from a low-quiescent-current device like LP2985-2.5) must remain stable to maintain ADC accuracy. If the reference drifts due to temperature or supply variation, gain and offset errors propagate directly into measurements. To optimize performance, select a reference with <20 ppm/°C drift and low dropout. Additionally, power the ADS7953SBRHBT’s digital and analog supplies from separate LDOs to minimize digital coupling through DVDD. Duty-cycling the ADC and reference using a GPIO-controlled enable (rather than always-on) can extend battery life while maintaining measurement consistency.
What are the integration challenges when interfacing the ADS7953SBRHBT with an STM32 microcontroller over SPI in a noisy industrial environment?
Interfacing the ADS7953SBRHBT with an STM32 MCU requires careful SPI configuration and noise management. The ADC’s SPI interface supports up to 20 MHz clock rates, but high-speed digital signals can couple into sensitive analog inputs on shared PCBs. To reduce noise, route SPI lines away from analog traces, use ground guard traces, and terminate MISO with a small series resistor (22Ω) near the ADC. Also, ensure the STM32 SPI mode matches the ADS7953SBRHBT’s timing: mode 0 (CPOL=0, CPHA=0) is typical, but verify tCONV (conversion time) and tDATA (data valid window) in the timing diagrams. In electrically noisy plants, consider adding ferrite beads on DVDD and decoupling with 100nF X7R + 10μF ceramic caps close to the 32-VQFN package. Use a separate ground return path for the digital SPI signals if ground bounce exceeds 200mV.
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ADS7953SBRHBT CAD Models
Texas Instruments ADS7953SBRHBT PCB symbols & footprints
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