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ADS1131IDR
Texas Instruments
IC ADC 18BIT SIGMA-DELTA 16SOIC
3817 Pcs New Original In Stock
18 Bit Analog to Digital Converter 1 Input 1 Sigma-Delta 16-SOIC
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5.0 / 5.0
- (328 Ratings)
ADS1131IDR
Product Overview
1255681
DiGi Electronics Part Number
ADS1131IDR-DGManufacturer
Texas Instruments
ADS1131IDR
Description
IC ADC 18BIT SIGMA-DELTA 16SOICInventory
3817 Pcs New Original In Stock
18 Bit Analog to Digital Converter 1 Input 1 Sigma-Delta 16-SOIC
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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ADS1131IDR Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Number of Bits
18
Sampling Rate (Per Second)
80
Number of Inputs
1
Input Type
Differential
Data Interface
SPI
Configuration
ADC
Ratio - S/H:ADC
-
Number of A/D Converters
1
Architecture
Sigma-Delta
Reference Type
External
Voltage - Supply, Analog
3V ~ 5.3V
Voltage - Supply, Digital
3V ~ 5.3V
Features
-
Operating Temperature
-40°C ~ 85°C
Package / Case
16-SOIC (0.154", 3.90mm Width)
Supplier Device Package
16-SOIC
Mounting Type
Surface Mount
Base Product Number
ADS1131
Datasheet & Documents
HTML Datasheet
ADS1131IDR-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
2156-ADS1131IDR
TEXTISADS1131IDR
-296-29591-1-DG
296-29591-1
296-29591-2
-296-29591-1
296-29591-6
-ADS1131IDR-DG
Standard Package
2,500
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
DiGi Electronics 웹사이트는 사용자 친화적이고 탐색이 매우 쉬워서 원하는 상품을 빠르게 찾을 수 있었어요.
de desembre 02, 2025
Service client au top, très prompt à répondre et à résoudre toutes mes questions.
de desembre 02, 2025
すぐに届き、使いたいときにすぐ使えました。商品も高品質です。
de desembre 02, 2025
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de desembre 02, 2025
DiGi Electronics consistently provides excellent service and support.
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Frequently Asked Questions (FAQ)
What are the key design risks when integrating the ADS1131IDR into a high-precision industrial sensor interface, and how can I mitigate noise and grounding issues?
When integrating the ADS1131IDR in high-precision industrial environments, the primary risks include ground bounce, reference voltage instability, and susceptibility to electromagnetic interference due to its 18-bit resolution. To mitigate these, use a separate analog ground plane tied to the digital ground at a single point, place a low-ESR bypass capacitor (e.g., 100 nF ceramic + 10 µF tantalum) as close as possible to the AVDD and DVDD pins, and ensure the external voltage reference (e.g., REF5025) is low-noise and properly decoupled. Avoid routing digital SPI lines near the analog input traces to prevent coupling noise into the sensitive sigma-delta modulator.
Can the ADS1131IDR be safely replaced with the ADS1115IDGSR in a weigh-scale application without redesigning the entire signal chain?
While both are 16-SOIC packaged delta-sigma ADCs from Texas Instruments, direct replacement of the ADS1131IDR with the ADS1115IDGSR is not recommended without evaluation. The ADS1115 has only 16-bit resolution (vs. 18-bit in ADS1131IDR) and a faster 860 SPS rate, which may introduce quantization noise in low-frequency, high-resolution applications like weigh scales. Additionally, the ADS1115 includes an internal PGA and reference, altering input impedance and biasing requirements. If your design relies on the ADS1131IDR’s higher resolution and external reference flexibility, you’ll likely need to recalibrate gain stages and reassess noise performance.
How does the single-ended vs. differential input configuration affect measurement accuracy when using the ADS1131IDR with a bridge-type pressure sensor?
The ADS1131IDR’s differential input is essential for maximizing accuracy with bridge sensors, as it rejects common-mode noise (e.g., ground shifts or EMI) that single-ended setups cannot. However, improper layout—such as unbalanced trace lengths or mismatched source impedances—can degrade CMRR. Always route IN+ and IN− symmetrically, keep source impedance below 10 kΩ to minimize offset errors, and avoid sharing ground return paths with digital circuitry. For best results, use a precision instrumentation amplifier before the ADS1131IDR if the bridge output is very low-level (<10 mV).
What are the long-term reliability concerns for the ADS1131IDR when operated near its maximum supply voltage (5.3V) in an automotive under-hood environment?
Operating the ADS1131IDR at 5.3V continuously in high-temperature automotive environments (approaching 85°C) increases the risk of electromigration and long-term drift in the internal analog circuitry. Although the device is rated for this condition, sustained operation at voltage and temperature limits reduces mean time between failures (MTBF). To enhance reliability, consider derating the supply to 5.0V using a low-dropout regulator (e.g., TPS7B7701), ensure adequate PCB copper pour for thermal dissipation, and perform periodic calibration to compensate for potential offset drift over time.
Is it safe to share the SPI bus between the ADS1131IDR and other high-speed digital peripherals like a microcontroller and flash memory without risking data corruption?
Sharing the SPI bus with high-speed peripherals can risk data integrity with the ADS1131IDR due to its relatively slow maximum SCLK rate (2.048 MHz) and strict timing requirements for DRDY (data-ready) signaling. Fast-switching signals from other devices may induce glitches on the shared lines, especially if pull-ups are undersized or trace lengths are mismatched. To prevent corruption, use separate chip-select lines, insert series termination resistors (22–100 Ω) near the ADS1131IDR’s SPI pins, and prioritize its DRDY interrupt over other SPI transactions. Alternatively, dedicate a low-noise SPI peripheral or use daisy-chaining only if all devices support compatible clock polarity and phase settings.
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ADS1131IDR CAD Models
Texas Instruments ADS1131IDR PCB symbols & footprints
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