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ADS7825UB
Texas Instruments
IC ADC 16BIT SAR 28SOIC
1377 Pcs New Original In Stock
16 Bit Analog to Digital Converter 4 Input 1 SAR 28-SOIC
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5.0 / 5.0
- (388 Ratings)
ADS7825UB
Product Overview
1238827
DiGi Electronics Part Number
ADS7825UB-DGManufacturer
Texas Instruments
ADS7825UB
Description
IC ADC 16BIT SAR 28SOICInventory
1377 Pcs New Original In Stock
16 Bit Analog to Digital Converter 4 Input 1 SAR 28-SOIC
Quantity
Minimum 1
Minimum 1
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ADS7825UB Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
-
Series
-
Product Status
Last Time Buy
Number of Bits
16
Sampling Rate (Per Second)
40k
Number of Inputs
4
Input Type
Single Ended
Data Interface
SPI, Parallel
Configuration
S/H-ADC
Ratio - S/H:ADC
1:1
Number of A/D Converters
1
Architecture
SAR
Reference Type
External, Internal
Voltage - Supply, Analog
5V
Voltage - Supply, Digital
5V
Features
-
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SOIC (0.295", 7.50mm Width)
Supplier Device Package
28-SOIC
Mounting Type
Surface Mount
Base Product Number
ADS7825
Datasheet & Documents
Manufacturer Product Page
ADS7825UB Specifications
HTML Datasheet
ADS7825UB-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
ADS7825UBE4-DG
ADS7825UBG4
ADS7825UBG4-DG
-ADS7825UBE4-NDR
ADS7825UB-NDR
-ADS7825UB-DG
ADS7825UBE4
TEXTISADS7825UB
2156-ADS7825UB
-ADS7825UB-NDR
-ADS7825UBE4
-ADS7825UBG4-NDR
-ADS7825UBG4
Standard Package
20
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
在這裡購物非常愉快，價格親民，網站體驗優秀。
de desembre 02, 2025
Ils offrent une excellente performance à un prix qui reste abordable, la fiabilité est au rendez-vous.
de desembre 02, 2025
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Frequently Asked Questions (FAQ)
Can the ADS7825UB be used in a high-channel-count data acquisition system, and what are the key design constraints when integrating it alongside similar 16-bit SAR ADCs like the ADS8688?
The ADS7825UB supports only 4 single-ended inputs, making it unsuitable for high-channel-count systems without external multiplexing. When comparing with the ADS8688IDBTR—which integrates 8 channels and operates on a similar 16-bit SAR architecture—the ADS7825UB requires additional signal conditioning and timing control to scale channel density. Designers must account for increased board space, crosstalk risks from external multiplexers, and precise SPI/parallel interface timing. For scalable multi-channel designs, migrating to the ADS8688 reduces component count and layout complexity, though the ADS7825UB may still serve legacy or low-channel applications where availability permits.
What are the implications of the ADS7825UB being labeled as Last Time Buy, and how should engineers plan for long-term reliability and obsolescence in new designs?
With the ADS7825UB in Last Time Buy status, TI has signaled discontinuation, increasing supply chain risk for long-term production. Engineers should assess lifetime buy quantities or evaluate drop-in replacements like the ADS8688IDBTR, which offers similar 16-bit resolution but with enhanced integration. Designers must validate compatibility in terms of timing, voltage levels (ADS7825UB uses 5V supplies; ADS8688 supports 3.3V/5V), and package footprint (28-SOIC is shared). For new designs, incorporating the ADS7825UB introduces obsolescence risk—mitigate by designing with socket adaptability or dual-footprint layouts that allow future conversion.
How does the dual interface support (SPI and parallel) on the ADS7825UB impact microcontroller selection and real-time performance in industrial control applications?
The ADS7825UB's dual SPI and parallel interfaces offer flexibility but introduce real-time trade-offs. Parallel interface usage enables faster throughput (up to 40kSPS with 5V MCU), beneficial for time-critical control loops, but demands more GPIOs and increases MCU complexity. In contrast, SPI reduces pin count but may create bandwidth bottlenecks on shared buses. Engineers must confirm that the host microcontroller can meet the 28-SOIC device’s timing specs—particularly t_CONV and t_ACCESS—especially when multiple ADCs are daisy-chained. For real-time deterministic sampling, assess parallel mode’s timing margin against system clock jitter and bus loading effects.
What are the critical design-in risks when replacing a malfunctioning ADS7825UB in a field-deployed system, and how does its internal/external reference option affect measurement stability?
Replacing an ADS7825UB in a fielded system risks measurement drift if the reference configuration isn’t preserved. The device supports both internal and external references—using the internal reference simplifies design but may introduce ±2 LSB offset drift over temperature. If the original design used an external precision reference (e.g., REF5050), replacing with a unit that defaults to internal without recalibration causes significant error. Always verify reference selection via pin strapping (REFSEL) and ensure stable 5V analog supply filtering (10µF ceramic + 100nF near VDDA). Also, match PCB layout parasitics—especially trace length and ground plane integrity—to maintain signal integrity at 16-bit resolution.
How does the 5V-only supply requirement of the ADS7825UB create compatibility issues in modern mixed-signal designs, and what voltage translation strategies mitigate integration risks?
The ADS7825UB requires 5V for both analog (VDDA) and digital (VDDD) supplies, which conflicts with modern 3.3V microcontrollers and FPGAs. Direct interfacing risks overvoltage damage to 3.3V logic inputs. Use bidirectional level translators (e.g., TXS0108E) on SPI or parallel lines, ensuring propagation delays don’t violate t_HOLD and t_SETUP timing. Additionally, isolate digital noise by separating 5V and 3.3V ground planes with a single-point tie and ferrite beads on power rails. Note that no direct 3.3V-compatible pin-for-pin variant exists—conversion requires careful BOM and layout updates, favoring newer SAR ADCs like the ADS8688 for simplified supply architecture.
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.
ADS7825UB CAD Models
Texas Instruments ADS7825UB PCB symbols & footprints
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