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ADS1146IPW
Texas Instruments
IC ADC 16BIT SIGMA-DELTA 16TSSOP
1287 Pcs New Original In Stock
16 Bit Analog to Digital Converter 1 Input 1 Sigma-Delta 16-TSSOP
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5.0 / 5.0
- (148 Ratings)
ADS1146IPW
Product Overview
1380887
DiGi Electronics Part Number
ADS1146IPW-DGManufacturer
Texas Instruments
ADS1146IPW
Description
IC ADC 16BIT SIGMA-DELTA 16TSSOPInventory
1287 Pcs New Original In Stock
16 Bit Analog to Digital Converter 1 Input 1 Sigma-Delta 16-TSSOP
Quantity
Minimum 1
Minimum 1
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ADS1146IPW Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Tube
Series
-
Product Status
Active
Number of Bits
16
Sampling Rate (Per Second)
2k
Number of Inputs
1
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 ~ 5.25V
Voltage - Supply, Digital
2.7V ~ 5.25V
Features
PGA
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
ADS1146
Datasheet & Documents
Manufacturer Product Page
ADS1146IPW Specifications
HTML Datasheet
ADS1146IPW-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
296-27415-5
-ADS1146IPW-NDR
-296-27415-5
-296-27415-5-DG
Standard Package
90
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Feeling good about buying from a company that cares about the environment and my wallet.
de desembre 02, 2025
Their pricing and packaging quality allow for worry-free procurement of electronic components.
de desembre 02, 2025
Their commitment to fast delivery and responsive support makes every transaction enjoyable.
de desembre 02, 2025
Fast response times and professional communication set DiGi Electronics apart from others in the industry.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when integrating the ADS1146IPW in a noisy industrial environment with long sensor traces?
When using the ADS1146IPW in noisy environments, the primary risk is signal integrity degradation due to EMI on long sensor lines. Since the ADC supports both differential and single-ended inputs, always use differential signaling with twisted-pair wiring to maximize common-mode rejection. Additionally, leverage the built-in PGA to amplify low-level signals before digitization, but ensure external RC filtering (anti-aliasing) is placed close to the ADC inputs to suppress high-frequency noise beyond the sigma-delta modulator’s bandwidth. Consider shielding and grounding strategies, especially when operating near the 2.7V minimum supply, where noise margins are reduced.
Can the ADS1146IPW replace the ADS1115 in an existing design, and what are the critical differences in performance and interface?
Yes, the ADS1146IPW can replace the ADS1115 in certain applications, but key differences must be addressed. While both are 16-bit sigma-delta ADCs, the ADS1146IPW uses an SPI interface versus the ADS1115’s I2C, requiring PCB layout and firmware changes. The ADS1146IPW lacks an internal reference (requires external precision reference) vs. the ADS1115’s internal 2.048V reference, impacting system cost and accuracy. However, the ADS1146IPW offers a higher sampling rate (2kSPS vs. 860SPS) and better INL performance, making it suitable for higher-precision, faster-response systems where SPI resources are available.
How does the external reference requirement of the ADS1146IPW impact system accuracy in battery-powered designs?
The ADS1146IPW requires an external voltage reference, which directly influences system accuracy and stability in battery-powered applications. As battery voltage declines over time, using a non-stabilized reference (e.g., tied directly to VDD) leads to gain errors in the ADC output. To maintain accuracy, pair the ADS1146IPW with a low-quiescent-current precision reference like the REF5025 or LP2985-2.5. Ensure the reference has low temperature drift and adequate drive capability, especially when the PGA is active, to prevent linearity errors under dynamic loading.
What are the reliability concerns when operating the ADS1146IPW at the upper limit of its 105°C temperature range in an embedded sensor module?
Operating the ADS1146IPW at 105°C requires careful thermal and electrical design to maintain long-term reliability. While the device is rated for -40°C to 105°C, performance parameters like offset drift, gain error, and noise can degrade near the thermal limits. Ensure adequate PCB copper for heat dissipation and avoid placing the ADC near high-power components. Validate stability of the external reference and power supply under temperature extremes. Also, verify that the SPI signal integrity is maintained, as timing margins shrink at elevated temperatures due to increased propagation delays.
What are the critical trade-offs when using the onboard PGA of the ADS1146IPW with high-impedance sensor sources?
When using the PGA in the ADS1146IPW with high-impedance sensors (e.g., thermistors, pH probes), the main trade-off is between signal gain and settling time. High input impedance combined with the PGA’s input capacitance can cause slow signal settling, leading to measurement inaccuracies at higher data rates. To mitigate this, reduce the ADC’s output data rate or insert an external unity-gain buffer amplifier (e.g., OPA333) between the sensor and ADS1146IPW. Also ensure that the external driver can settle within the ADC’s acquisition time to avoid gain and linearity errors.
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.
ADS1146IPW CAD Models
Texas Instruments ADS1146IPW PCB symbols & footprints
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