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ADS1211E/1K
Texas Instruments
IC ADC 24BIT SIGMA-DELTA 28SSOP
5083 Pcs New Original In Stock
24 Bit Analog to Digital Converter 4 Input 1 Sigma-Delta 28-SSOP
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ADS1211E/1K
Product Overview
1387876
DiGi Electronics Part Number
ADS1211E/1K-DGManufacturer
Texas Instruments
ADS1211E/1K
Description
IC ADC 24BIT SIGMA-DELTA 28SSOPInventory
5083 Pcs New Original In Stock
24 Bit Analog to Digital Converter 4 Input 1 Sigma-Delta 28-SSOP
Quantity
Minimum 1
Minimum 1
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ADS1211E/1K Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
-
Series
-
Product Status
Last Time Buy
Number of Bits
24
Sampling Rate (Per Second)
16k
Number of Inputs
4
Input Type
Differential
Data Interface
SPI
Configuration
MUX-PGA-ADC
Ratio - S/H:ADC
-
Number of A/D Converters
1
Architecture
Sigma-Delta
Reference Type
External, Internal
Voltage - Supply, Analog
5V
Voltage - Supply, Digital
5V
Features
PGA
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SSOP (0.209", 5.30mm Width)
Supplier Device Package
28-SSOP
Mounting Type
Surface Mount
Base Product Number
ADS1211
Datasheet & Documents
Manufacturer Product Page
ADS1211E/1K Specifications
HTML Datasheet
ADS1211E/1K-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
ADS1211E/1K-NDR
Standard Package
1,000
Alternative Parts
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Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
The overall value I get from DiGi Electronics is exceptional, considering the safety and price benefits.
de desembre 02, 2025
Packaging was done thoughtfully, ensuring the items arrived safely and intact.
de desembre 02, 2025
Affordable prices combined with excellent customer support make DiGi stand out.
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Frequently Asked Questions (FAQ)
Can the ADS1211E/1K be used as a drop-in replacement for the ADS1256IDBR in high-precision sensor applications, and what are the key design-in risks?
The ADS1211E/1K is not a direct drop-in replacement for the ADS1256IDBR due to differences in interface timing, pinout, and integration level. While both are 24-bit sigma-delta ADCs, the ADS1211E/1K lacks an onboard oscillator and requires an external clock, increasing design complexity. Additionally, the ADS1211E/1K uses a 28-SSOP package vs. the ADS1256IDBR's 32-TQFP, requiring PCB layout changes. Key risks include timing mismatches in SPI communication and reduced system-level integration, as the ADS1256IDBR includes a built-in oscillator and multiplexer control. When replacing, verify clock generation, layout rework, and firmware SPI settings to prevent data corruption or reduced throughput in precision sensing designs.
What are the reliability concerns when using the ADS1211E/1K in industrial environments near its maximum operating temperature of 85°C?
Operating the ADS1211E/1K near its 85°C upper limit increases long-term reliability risks, particularly in high-humidity or thermally cycling environments. Since the device has MSL 2 (1-year floor life), moisture ingress during reflow can cause delamination or popcorning if not stored and handled properly. To mitigate failure risks, use conformal coating, ensure proper PCB thermal vias for heat dissipation, and avoid placing the ADS1211E/1K near high-power components. Also consider derating performance—reduce sampling rate or enable duty cycling—to minimize self-heating and extend operational life in harsh industrial settings.
How does the external reference dependency of the ADS1211E/1K impact accuracy in precision weigh-scale designs, and what reference ICs are recommended?
The ADS1211E/1K supports both internal and external references, but for high-accuracy weigh-scale applications, an external precision reference like the REF5025 or ADR4525 is critical to minimize drift and noise. Relying on the internal reference limits long-term stability, especially under temperature extremes or power supply fluctuations. Using an external reference with <10 ppm/°C drift and low noise (<10 µV RMS) improves overall system accuracy. Ensure low-impedance routing and proper decoupling (10 µF X7R + 100 nF ceramic) near the REF pins to prevent oscillation or gain error in strain gauge signal chains using the ADS1211E/1K.
What are the signal integrity challenges when interfacing the ADS1211E/1K's SPI bus in noisy industrial systems, and how can they be mitigated?
In noisy industrial environments, the ADS1211E/1K's SPI interface is susceptible to glitches due to long trace lengths or poor grounding, potentially corrupting configuration or ADC data. To ensure signal integrity, keep SPI traces short and matched in length, use ground shielding around SCLK and DIN lines, and implement series termination resistors (22–47 Ω) near the driver. Use opto-isolation or digital isolators (e.g., ISO7741) if interfacing with microcontrollers in high-noise zones. Additionally, enable SPI mode 1 or 3 consistently and validate timing margins against the ADS1211E/1K’s t<sub>SU</sub> and t<sub>HD</sub> specs to avoid communication errors in motor control or PLC-like applications.
What design trade-offs arise when using the PGA in the ADS1211E/1K for low-level thermocouple signals vs. external instrumentation amplifiers?
Using the integrated PGA in the ADS1211E/1K simplifies signal chain design for thermocouple measurements but introduces trade-offs in noise performance and input current. At high gains (e.g., 128V/V), the PGA’s input-referred noise may degrade resolution for microvolt-level thermocouple outputs. Additionally, the ADS1211E/1K’s input impedance varies with PGA setting, risking signal loading if filtering capacitors are too large. For better performance, consider using an external low-input-bias-current amplifier like the INA333 before the ADS1211E/1K, especially in cold-junction compensation circuits. This improves linearity and allows independent optimization of filtering and amplification stages.
Quality Assurance (QC)
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ADS1211E/1K CAD Models
Texas Instruments ADS1211E/1K PCB symbols & footprints
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