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ADS124S08IPBS
Texas Instruments
IC ADC 24BIT SIGMA-DELTA 32LQFP
69468 Pcs New Original In Stock
24 Bit Analog to Digital Converter 12 Input 1 Sigma-Delta 32-TQFP (5x5)
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ADS124S08IPBS
Product Overview
1249850
DiGi Electronics Part Number
ADS124S08IPBS-DGManufacturer
Texas Instruments
ADS124S08IPBS
Description
IC ADC 24BIT SIGMA-DELTA 32LQFPInventory
69468 Pcs New Original In Stock
24 Bit Analog to Digital Converter 12 Input 1 Sigma-Delta 32-TQFP (5x5)
Quantity
Minimum 1
Minimum 1
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ADS124S08IPBS Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Tray
Series
-
Product Status
Active
Number of Bits
24
Sampling Rate (Per Second)
4k
Number of Inputs
12
Input Type
Single Ended
Data Interface
SPI
Configuration
MUX-PGA-ADC
Ratio - S/H:ADC
0:1
Number of A/D Converters
1
Architecture
Sigma-Delta
Reference Type
External, Internal
Voltage - Supply, Analog
2.7V ~ 5.25V
Voltage - Supply, Digital
2.7V ~ 3.6V
Features
PGA
Operating Temperature
-50°C ~ 125°C
Package / Case
32-TQFP
Supplier Device Package
32-TQFP (5x5)
Mounting Type
Surface Mount
Base Product Number
ADS124S08
Datasheet & Documents
Manufacturer Product Page
ADS124S08IPBS Specifications
HTML Datasheet
ADS124S08IPBS-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
2156-ADS124S08IPBS
296-45189
TEXTISADS124S08IPBS
Standard Package
250
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
I appreciate their commitment to ensuring customer satisfaction after purchase.
de desembre 02, 2025
DiGi Electronics consistently delivers high-quality products with impressive reliability.
de desembre 02, 2025
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Frequently Asked Questions (FAQ)
Can the ADS124S08IPBS operate reliably in high-temperature industrial applications above 105°C, and what PCB design considerations should I implement to ensure stability at maximum junction temperature?
Yes, the ADS124S08IPBS is rated for operation from -50°C to +125°C, making it suitable for high-temperature industrial environments such as motor control or downhole sensing. To ensure reliability at elevated temperatures, minimize thermal resistance by using adequate copper vias under the exposed pad, maintain ground plane integrity, and avoid placing heat-generating components nearby. Monitor junction temperature by calculating power dissipation (considering SPI clock rate and PGA gain settings) and derating performance if operating near 125°C to prevent long-term drift or reference instability.
How does the internal PGA in the ADS124S08IPBS affect noise performance compared to external amplification, and when should I bypass it for better signal integrity?
The integrated PGA in the ADS124S08IPBS provides up to 128x gain with low noise (650nVpp at 60SPS), which is sufficient for most sensor interfaces like RTDs or thermocouples. However, using high gain settings increases quantization noise contribution and may limit dynamic range. For low-frequency, microvolt-level signals requiring ultra-low noise, consider bypassing the PGA and using a low-noise external amplifier (e.g., INA188) followed by the ADS124S08IPBS in gain = 1 mode. This avoids PGA-induced nonlinearities and allows optimized filtering between stages.
Is the ADS124S08IPBS a viable drop-in replacement for the MAX11200 or ADS1256 in existing data acquisition systems, and what key interface differences should I watch for?
While the ADS124S08IPBS offers similar 24-bit resolution and sigma-delta architecture, it is not a direct pin-to-pin replacement for the MAX11200 or ADS1256. Compared to the MAX11200, the ADS124S08IPBS has a 12-channel multiplexer vs. 8 channels and includes an integrated PGA—requiring routing and layout revisions. The ADS1256 uses a different SPI protocol (DOUT tied to MISO) and has dual analog supplies, so level-shifting and firmware timing adjustments are needed when migrating. Always verify timing requirements for CONVST and DRDY signals and validate SPI mode (mode 1 supported by ADS124S08IPBS) in your MCU driver.
What are the risks of using the internal reference on the ADS124S08IPBS in a noisy system environment, and when should I switch to an external reference like the REF5025?
The internal 2.048V reference on the ADS124S08IPBS has a typical drift of 3ppm/°C and is suitable for cost-sensitive or space-constrained designs. However, in electrically noisy environments—especially with switching power supplies or high-speed digital signals—this reference can couple noise, increasing ADC output instability. For precision measurements (e.g., strain gauges or weigh scales), use an external reference like the REF5025 (2.5V, 3ppm/°C max, low noise) with proper decoupling (10µF ceramic + 100nF near the ADS124S08IPBS REFP pin). This improves long-term accuracy and reduces sensitivity to supply transients.
How can I minimize crosstalk between input channels on the ADS124S08IPBS when switching rapidly between high-impedance sensor sources?
Crosstalk in the ADS124S08IPBS can occur when multiplexing high-impedance sources (>1kΩ) at high data rates due to incomplete settling of the input buffer and charge injection. To mitigate this, ensure source impedance is below 1kΩ or increase the input settling time by reducing the data rate or inserting a software delay after channel change. Use on-chip buffer if enabled (lowers effective drive requirement), and add small RC filters (e.g., 10Ω + 100nF) at each input. For critical measurements, perform system-level crosstalk calibration by grounding adjacent channels and measuring offset shifts when switching.
Quality Assurance (QC)
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ADS124S08IPBS CAD Models
Texas Instruments ADS124S08IPBS PCB symbols & footprints
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