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ADS1220IPWR
Texas Instruments
IC ADC 24BIT SIGMA-DELTA 16TSSOP
12469 Pcs New Original In Stock
24 Bit Analog to Digital Converter 2, 4 Input 1 Sigma-Delta 16-TSSOP
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ADS1220IPWR
Product Overview
1236649
DiGi Electronics Part Number
ADS1220IPWR-DGManufacturer
Texas Instruments
ADS1220IPWR
Description
IC ADC 24BIT SIGMA-DELTA 16TSSOPInventory
12469 Pcs New Original In Stock
24 Bit Analog to Digital Converter 2, 4 Input 1 Sigma-Delta 16-TSSOP
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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ADS1220IPWR 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)
2k
Number of Inputs
2, 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, Internal, Supply
Voltage - Supply, Analog
2.3V ~ 5.5V, ±2.5
Voltage - Supply, Digital
2.3V ~ 5.5V
Features
PGA, Temperature Sensor
Operating Temperature
-40°C ~ 125°C
Package / Case
16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package
16-TSSOP
Mounting Type
Surface Mount
Base Product Number
ADS1220
Datasheet & Documents
Manufacturer Product Page
ADS1220IPWR Specifications
HTML Datasheet
ADS1220IPWR-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
296-39851-6
ADS1220IPWR-DG
-296-39851-1-DG
296-39851-2
296-39851-1
Standard Package
2,500
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Their budget-friendly prices help me save, and their eco-packaging aligns with my values.
Dec 02, 2025
Their responsive customer service team always addresses our concerns promptly.
Dec 02, 2025
Whenever we've faced technical challenges, their support team provided quick, detailed guidance to resolve them.
Dec 02, 2025
I appreciated the prompt shipping and the careful, secure packaging.
Dec 02, 2025
Speedy delivery combined with reliable, durable products makes DiGi Electronics my go-to supplier.
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Frequently Asked Questions (FAQ)
Can the ADS1220IPWR safely interface with a 3.3V microcontroller when using an external 5V analog reference, and what are the risks of damaging the SPI lines or ADC inputs during power-up sequencing?
Yes, the ADS1220IPWR can interface with a 3.3V microcontroller even with a 5V external reference, but power-up sequencing is critical. The digital I/O pins on the ADS1220IPWR are not 5V-tolerant when the device is unpowered, so applying 3.3V logic to SCLK, DIN, or CS before VDD reaches ~1.8V may forward-bias internal ESD diodes, causing latch-up or damage. To mitigate this, use a voltage supervisor to ensure the microcontroller only drives the SPI bus after ADS1220IPWR VDD is stable, or employ level-shifting buffers with enable control. Additionally, ensure the external reference voltage does not exceed AVDD + 0.3V during startup to avoid stressing the internal PGA and modulator.
What are the key reliability concerns when replacing the ADS1220IPWR with the ADS122C04IPWR in a battery-powered industrial sensor node, especially regarding quiescent current and long-term drift?
While the ADS122C04IPWR offers I²C interface convenience, it draws significantly higher quiescent current (120 µA typical vs. 180 µA shutdown current on ADS1220IPWR), which may reduce battery life in always-on applications. More critically, the ADS122C04IPWR lacks the same level of internal reference stability and PGA linearity over temperature, leading to higher offset and gain drift in harsh environments. For precision measurements over years in remote deployments, the ADS1220IPWR’s superior noise performance and lower long-term drift (especially when paired with a stable external reference like the REF5025) make it a more reliable choice despite requiring SPI routing.
How should I handle ground layout and decoupling when integrating the ADS1220IPWR into a mixed-signal PCB with high-current digital components nearby, to avoid degrading 24-bit performance?
To preserve 24-bit accuracy, isolate the ADS1220IPWR’s analog ground (AGND) from noisy digital return paths using a single-point star ground connection near the ADC. Place a 10 µF tantalum or ceramic capacitor directly at AVDD and a 0.1 µF ceramic capacitor at DVDD, both as close to the pins as possible. Route analog input traces away from switching regulators, clocks, or high-speed digital lines, and use guard rings tied to AGND around sensitive inputs. Avoid splitting the ground plane; instead, use a solid ground plane with careful component placement to minimize return current loops that could couple noise into the ADC’s reference or input stages.
Is it safe to operate the ADS1220IPWR at its maximum sampling rate of 2 kSPS continuously in a 125°C ambient environment, and what thermal management or derating practices should be applied?
Operating the ADS1220IPWR at 2 kSPS continuously at 125°C is within its specified limits, but self-heating from the internal PGA and modulator can elevate the junction temperature beyond ambient. At full load, power dissipation may reach ~5 mW, which in a 16-TSSOP package without thermal vias can cause a 10–15°C rise. This reduces long-term reliability and may increase offset drift. To mitigate, ensure adequate copper pour under the package connected to AGND, avoid enclosing the device in dense layouts, and consider reducing PGA gain or duty-cycling conversions if thermal buildup is observed. Always validate performance in the final thermal environment using an infrared camera or thermocouple.
When using the ADS1220IPWR’s internal temperature sensor for cold-junction compensation in a thermocouple application, how accurate is it compared to an external precision sensor like the TMP117, and what calibration steps are necessary?
The ADS1220IPWR’s internal temperature sensor has a typical accuracy of ±2°C and lacks factory calibration, making it unsuitable for high-precision cold-junction compensation without user calibration. In contrast, the TMP117 offers ±0.1°C accuracy and digital output. For applications requiring better than ±1°C total system accuracy, use the TMP117 placed thermally close to the thermocouple junction and average multiple readings from both sensors. If using only the ADS1220IPWR’s sensor, perform a two-point calibration in a thermal chamber at 0°C and 50°C to characterize offset and slope, then apply correction coefficients in firmware. Always account for thermal lag between the ADC die and the thermocouple connection point.
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ADS1220IPWR CAD Models
Texas Instruments ADS1220IPWR PCB symbols & footprints
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