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ADS1242IPWT
Texas Instruments
IC ADC 24BIT SIGMA-DELTA 16TSSOP
2073 Pcs New Original In Stock
24 Bit Analog to Digital Converter 4 Input 1 Sigma-Delta 16-TSSOP
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5.0 / 5.0
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ADS1242IPWT
Product Overview
1228805
DiGi Electronics Part Number
ADS1242IPWT-DGManufacturer
Texas Instruments
ADS1242IPWT
Description
IC ADC 24BIT SIGMA-DELTA 16TSSOPInventory
2073 Pcs New Original In Stock
24 Bit Analog to Digital Converter 4 Input 1 Sigma-Delta 16-TSSOP
Quantity
Minimum 1
Minimum 1
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ADS1242IPWT Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Number of Bits
24
Sampling Rate (Per Second)
15
Number of Inputs
4
Input Type
Differential, Single Ended
Data Interface
SPI
Configuration
MUX-PGA-ADC
Ratio - S/H:ADC
-
Number of A/D Converters
1
Architecture
Sigma-Delta
Reference Type
External
Voltage - Supply, Analog
2.7V ~ 3.3V, 5V
Voltage - Supply, Digital
2.7V ~ 5.25V
Features
PGA
Operating Temperature
-40°C ~ 85°C
Package / Case
16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package
16-TSSOP
Mounting Type
Surface Mount
Base Product Number
ADS1242
Datasheet & Documents
Manufacturer Product Page
ADS1242IPWT Specifications
HTML Datasheet
ADS1242IPWT-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
296-12417-5
ADS1242IPWTTR-NDR
-ADS1242IPWTCT-NDR
ADS1242IPWTG4-DG
ADS1242IPWTDKR
-ADS1242IPWTG4
ADS1242IPWTTR
ADS1242IPWTCT-NDR
-ADS1242IPWTCT
-ADS1242IPWTG4-NDR
296-12417-5-DG
2156-ADS1242IPWTTR
-ADS1242IPWT-NDR
ADS1242IPWTCT
-ADS1242IPWTCT-DG
ADS1242IPWTG4
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
L’utilisation d’emballages durables chez DiGi Electronics est un vrai plus. Et leurs prix sont tout aussi attractifs.
de desembre 02, 2025
Toujours livré rapidement, leur service après-vente est irréprochable.
de desembre 02, 2025
早くて丁寧な配送サービスに満足しています。
de desembre 02, 2025
スタッフの対応が親切で、安心して相談できます。
de desembre 02, 2025
Even after years of use, DiGi Electronics' products still function flawlessly, highlighting their durability.
de desembre 02, 2025
Their technical support staff helps us resolve problems without needing to escalate.
de desembre 02, 2025
Shipment was swift, and the durability of the product makes it clear that high-quality materials are used.
de desembre 02, 2025
Their products have proven to be consistently reliable over time.
de desembre 02, 2025
Customer service was proactive and followed up to ensure satisfaction.
de desembre 02, 2025
Timely shipments combined with thoughtful packaging make working with DiGi Electronics a pleasure.
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Frequently Asked Questions (FAQ)
When designing in the ADS1242IPWT for a low-power sensor interface, what risks should I consider if I power the analog and digital supplies from separate voltage rails?
When using separate supplies for the analog (2.7V–3.3V or 5V) and digital (2.7V–5.25V) domains in the ADS1242IPWT, ensure both voltage rails stabilize before enabling conversions to prevent latching issues or reference instability. A common risk is ground bounce or noise coupling from the digital supply into the analog section, degrading SNR and effective resolution. Always tie AVDD and DVDD to clean, filtered sources with ferrite beads when split, and ensure common ground planes with minimal impedance. The ADS1242IPWT tolerates this operation, but poor supply segregation can compromise its 24-bit sigma-delta performance in precision applications.
Can the ADS1242IPWT replace the ADS1240UG in an existing thermocouple measurement system without redesigning the signal chain?
Yes, the ADS1242IPWT can generally replace the ADS1240UG in thermocouple applications due to identical pinouts, 24-bit sigma-delta architecture, and onboard PGA. However, verify that your external reference voltage meets the ADS1242IPWT’s compliance requirements, as it uses an external reference—unlike some integrated-reference variants. Additionally, ensure SPI timing meets the 15 SPS data rate alignment and confirm that your firmware handles the status bits in the data output frame, which may differ slightly. The replacement improves long-term reliability due to better temperature drift specifications in the ADS1242IPWT.
How does the external reference requirement of the ADS1242IPWT impact accuracy in a noisy industrial environment, and how can I mitigate this risk?
The ADS1242IPWT relies on an external reference, making it vulnerable to noise and voltage drift in industrial settings. Any fluctuation in the reference directly scales the ADC output, introducing measurement errors. To mitigate this, use a precision, low-noise reference such as the REF5025 or REF35 with adequate decoupling (10μF tantalum + 100nF ceramic) near the REF pins. Route reference traces away from digital or high-current paths and consider shielding in high EMI environments. Monitoring the reference voltage via one of the four input channels can also enable real-time error correction in software.
What are the integration risks of using the internal PGA of the ADS1242IPWT with high-impedance load cells, and how can I reduce measurement errors?
The ADS1242IPWT’s internal PGA can amplify signals from high-impedance load cells, but the input impedance—especially in single-ended mode—may cause gain errors or long settling times if the source impedance exceeds a few kΩ. For accurate results, use differential inputs to improve common-mode rejection and ensure the driving circuitry has low output impedance (<1 kΩ). Adding external unity-gain buffers (e.g., OPA333) before the ADS1242IPWT inputs helps maintain signal integrity and prevents leakage currents from affecting the 24-bit resolution. Also, limit chopper-stabilized amplifier use due to potential switching noise interference.
Is the ADS1242IPWT suitable for continuous high-throughput data logging at 15 SPS with SPI clock tolerance on a microcontroller with limited timing precision?
The ADS1242IPWT supports 15 SPS maximum output rate, making it suitable for low-speed data logging, but timing precision matters. The SPI interface requires stable SCLK synchronization with DRDY signals, and microcontrollers with imprecise SPI timing can miss data or trigger false reads. Use the DRDY pin to interrupt the MCU and initiate SPI reads instead of polling. Set SPI clock polarity and phase to Mode 1 (CPOL=0, CPHA=1) as required by the ADS1242IPWT, and maintain SCLK frequency within specified limits (typically <1.8 MHz). Implement hardware flow control when possible to prevent data loss during continuous conversions.
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.
ADS1242IPWT CAD Models
Texas Instruments ADS1242IPWT PCB symbols & footprints
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