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ADS7947SRTET
Texas Instruments
IC ADC 12BIT SAR 16WQFN
1445 Pcs New Original In Stock
12 Bit Analog to Digital Converter 2 Input 1 SAR 16-WQFN (3x3)
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ADS7947SRTET
Product Overview
1239814
DiGi Electronics Part Number
ADS7947SRTET-DGManufacturer
Texas Instruments
ADS7947SRTET
Description
IC ADC 12BIT SAR 16WQFNInventory
1445 Pcs New Original In Stock
12 Bit Analog to Digital Converter 2 Input 1 SAR 16-WQFN (3x3)
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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ADS7947SRTET 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)
2M
Number of Inputs
2
Input Type
Pseudo-Differential
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
1.65V ~ 5.25V
Features
-
Operating Temperature
-40°C ~ 125°C
Package / Case
16-WFQFN Exposed Pad
Supplier Device Package
16-WQFN (3x3)
Mounting Type
Surface Mount
Base Product Number
ADS7947
Datasheet & Documents
HTML Datasheet
ADS7947SRTET-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
296-32020-1
296-32020-2
ADS7947SRTET-DG
296-32020-6
Standard Package
250
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
DiGi Electronics는 가격과 배송이 모두 신뢰 가능합니다.
de desembre 02, 2025
他們的運送很準時，從未因延遲而失望，每次都很滿意！
de desembre 02, 2025
Their budget-friendly options never compromise on reliability.
de desembre 02, 2025
Received my goods in record time! The packaging was robust and safe.
de desembre 02, 2025
I admire DiGi Electronics’ consistent focus on customer satisfaction.
de desembre 02, 2025
We are very satisfied with the extensive range of products and the swift order processing.
de desembre 02, 2025
Shipping always arrives promptly, showcasing their efficiency.
de desembre 02, 2025
DiGi Electronics delivers every time with great prices and on-time shipping—very dependable.
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Frequently Asked Questions (FAQ)
When designing a portable battery-powered device requiring 2-channel, 12-bit analog-to-digital conversion, what are the key considerations for selecting the Texas Instruments ADS7947SRTET to ensure optimal power efficiency and signal integrity with its 2.7V to 5.25V analog supply?
When selecting the ADS7947SRTET for a battery-powered application, focus on its active power consumption at your typical operating voltage and sampling rate. The 2.7V lower analog supply limit is crucial for maximizing battery life. To maintain signal integrity, ensure your analog source impedance is significantly lower than the input impedance of the ADS7947SRTET to avoid loading effects. For power efficiency, consider using the SPI interface in a manner that minimizes bus activity when conversions aren't needed, and investigate if the ADS7947SRTET has any low-power modes, although they are not explicitly listed. Careful layout, including proper grounding and decoupling capacitors close to the analog supply pins, is also paramount, especially when operating near the lower voltage limits.
My design requires replacing an older 12-bit SAR ADC with a similar channel count and SPI interface. How does the Texas Instruments ADS7947SRTET, with its 2M sample rate and pseudo-differential input, compare to a hypothetical competitor like the Analog Devices AD7490ARTZ in terms of integration complexity and potential performance trade-offs?
When considering the ADS7947SRTET as a replacement for an older ADC like the AD7490ARTZ, the integration complexity is generally low due to the common SPI interface and similar architecture. However, the ADS7947SRTET's pseudo-differential input offers an advantage by allowing for common-mode rejection, which can improve accuracy in noisy environments compared to a purely single-ended input. The ADS7947SRTET's 2M sample rate is a significant uplift if your current design is slower, potentially allowing for higher throughput. Be mindful of the ADS7947SRTET's reference type (External) – ensure your reference voltage is stable and within the specified range. The footprint and pinout (16-WQFN 3x3) should also be verified for direct PCB compatibility or if minor layout adjustments are needed.
I'm experiencing intermittent data errors when using the ADS7947SRTET at its maximum 2M sample rate in a high-temperature industrial environment (-40°C to 125°C). What specific design considerations or potential failure modes related to the ADS7947SRTET could be causing these issues, and how can I mitigate them?
Intermittent data errors with the ADS7947SRTET at 2M samples/sec in a high-temperature environment often point to thermal management or signal integrity issues. While the ADS7947SRTET is rated for 125°C, exceeding its thermal dissipation capabilities can lead to performance degradation. Ensure adequate copper pour and vias on your PCB to draw heat away from the 16-WQFN (3x3) package. Additionally, at high speeds, crosstalk between adjacent signals on the SPI bus can become problematic. Review your layout for proper routing of digital signals, keeping them short and separated from analog lines. Also, verify the stability of your external reference voltage, as temperature fluctuations can affect its accuracy, directly impacting the ADC's readings. Consider a slightly lower sampling rate if these issues persist to reduce stress on the device.
My application involves acquiring signals from two sensors with potentially different common-mode voltages. How can the pseudo-differential input of the Texas Instruments ADS7947SRTET be effectively utilized to handle these varying common-mode potentials without requiring complex signal conditioning circuitry, and what are the primary risks associated with this approach?
The pseudo-differential input of the ADS7947SRTET is designed to accept signals where both the positive and negative inputs can vary. This is ideal for your scenario with two sensors having different common-mode voltages. You can connect each sensor's output to one of the ADS7947SRTET's input channels, with the other channel potentially grounded or connected to a common reference point to establish the common-mode baseline. The primary risk with the ADS7947SRTET's pseudo-differential input is that it still has common-mode voltage limits (within its analog supply range). If the common-mode voltage of either input exceeds the ADS7947SRTET's specified range, it can lead to clipping, inaccurate readings, or even device damage. Ensure your sensor outputs remain within the ADC's common-mode input range.
I need to replace a legacy 12-bit ADC, and the Texas Instruments ADS7947SRTET is a candidate. However, my previous design struggled with settling time issues when using a higher-impedance source. What practical steps can I take with the ADS7947SRTET's input stage, considering its SAR architecture, to ensure accurate readings even with source impedances up to 10kΩ, given its 1:1 S/H ratio?
When facing settling time issues with higher source impedances like 10kΩ, and using the ADS7947SRTET, the key is to ensure the internal sample-and-hold capacitor fully charges before the conversion begins. The ADS7947SRTET's 1:1 S/H ratio means the acquisition time is directly tied to the sampling rate. To mitigate this with a 10kΩ source impedance, consider using a low-ESR capacitor directly at the input pins of the ADS7947SRTET to form a low-pass filter and reduce the effective source impedance seen by the ADC's internal circuitry. You may also need to reduce the sampling rate of the ADS7947SRTET to allow sufficient time for the capacitor to settle. Carefully review the ADS7947SRTET's datasheet for specific acquisition time recommendations at different sampling rates, and experiment to find the optimal balance between speed and accuracy for your source impedance.
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ADS7947SRTET CAD Models
Texas Instruments ADS7947SRTET PCB symbols & footprints
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