Counterfeit and defect prevention
Visual and packaging inspection
Electrical performance verification
Service Email:
[email protected]
>
ADS7815U
Texas Instruments
IC ADC 16BIT SAR 28SOIC
1183 Pcs New Original In Stock
16 Bit Analog to Digital Converter 1 Input 1 SAR 28-SOIC
Request Quote
(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (259 Ratings)
ADS7815U
Product Overview
1229185
DiGi Electronics Part Number
ADS7815U-DGManufacturer
Texas Instruments
ADS7815U
Description
IC ADC 16BIT SAR 28SOICInventory
1183 Pcs New Original In Stock
16 Bit Analog to Digital Converter 1 Input 1 SAR 28-SOIC
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
Shipping & Delivery
Quality Assurance
365 - Day Quality Guarantee - Every part fully backed.
90 - Day Refund or Exchange - Defective parts? No hassle.
Limited Stock, Order Now - Get reliable parts without worry.
Global Shipping & Secure Packaging
Worldwide Delivery in 3-5 Business Days
100% ESD Anti-Static Packaging
Real-Time Tracking for Every Order
Secure & Flexible Payment
Credit Card, VISA, MasterCard, PayPal, Western Union, Telegraphic Transfer(T/T) and more
All payments encrypted for security
ADS7815U Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Tube
Series
-
Product Status
Last Time Buy
Number of Bits
16
Sampling Rate (Per Second)
250k
Number of Inputs
1
Input Type
Single Ended
Data Interface
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
-25°C ~ 85°C
Package / Case
28-SOIC (0.295", 7.50mm Width)
Supplier Device Package
28-SOIC
Mounting Type
Surface Mount
Base Product Number
ADS7815
Datasheet & Documents
Manufacturer Product Page
ADS7815U Specifications
HTML Datasheet
ADS7815U-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
-ADS7815UG4
2156-ADS7815U
-ADS7815U-NDR
-ADS7815UE4
-ADS7815UG4-NDR
ADS7815U-NDR
-ADS7815U-DG
TEXTISADS7815U
-ADS7815UE4-NDR
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
Leur service après-vente est très professionnel, ils ont toujours été à l'écoute et réactifs à mes demandes.
de desembre 02, 2025
The packaging materials used by DiGi are robust and reliable, preventing any damage during transit.
de desembre 02, 2025
The staff was friendly and helped me track my order without any hassle.
de desembre 02, 2025
The speed of delivery is amazing, facilitating urgent needs.
Publish Evalution
Evalution Message
Please enter your review message.
Please post honest comments and do not post ilegal comments.
Frequently Asked Questions (FAQ)
Is the ADS7815U still a viable choice for new designs given its 'Last Time Buy' status, and what are the risks of long-term supply chain dependency?
The ADS7815U is currently in a 'Last Time Buy' phase, meaning Texas Instruments is discontinuing it and no longer accepting new orders beyond existing inventory. While 1,137 units are in stock, this supply is finite and not replenishable. For new designs, this poses significant long-term risk: once stock depletes, you cannot reorder, potentially halting production. We recommend qualifying a drop-in replacement like the ADS7811U (lower speed but pin-compatible) or migrating to a modern alternative such as the ADS9224RIRHBR, which offers higher throughput, lower power, and ongoing support—critical for designs with 5+ year lifecycles.
Can I replace the ADS7815U with the ADS7811U in an existing 16-bit data acquisition system without redesigning the PCB or firmware?
The ADS7815U and ADS7811U share the same 28-SOIC package and pinout, making them electrically and mechanically compatible for drop-in replacement. However, the ADS7811U has a lower sampling rate (200 kSPS vs. 250 kSPS) and slightly different timing characteristics. If your system operates below 200 kSPS and timing margins are not tight, the swap is feasible. Verify setup/hold times for the parallel interface and confirm that your microcontroller can accommodate the minor timing shifts. Always validate performance under worst-case conditions, especially in high-accuracy applications where settling time affects effective resolution.
What are the key reliability concerns when using the ADS7815U in industrial environments near its upper temperature limit of 85°C, especially regarding long-term drift and reference stability?
Operating the ADS7815U near its 85°C maximum ambient temperature increases risk of long-term parameter drift, particularly in offset and gain error, due to thermal stress on internal circuitry. Since it uses an external reference, any drift in your reference voltage (e.g., from a bandgap or voltage reference IC) will directly impact accuracy. At elevated temperatures, even high-quality references can exhibit increased noise and drift. To mitigate risk, use a precision low-drift reference (e.g., REF5025), ensure adequate PCB thermal management, and avoid sustained operation above 70°C unless system-level calibration is implemented. Consider derating and periodic recalibration in mission-critical applications.
How does the ADS7815U’s single-ended input and parallel interface constrain high-noise or high-channel-count system designs, and what architectural workarounds are effective?
The ADS7815U’s single-ended input lacks common-mode noise rejection, making it susceptible to ground loops and EMI in industrial or motor-drive environments. Its parallel 16-bit interface also consumes significant GPIO pins (16 data + control lines), limiting scalability in multi-channel systems. To mitigate noise, use shielded twisted-pair wiring, local analog ground planes, and RC filtering at the input. For channel expansion, pair the ADS7815U with a precision analog multiplexer (e.g., DG408) ahead of the ADC, but account for multiplexer settling time in your sampling budget. Alternatively, consider migrating to a differential-input ADC with SPI interface (like the ADS9224RIRHBR) to reduce pin count and improve noise immunity.
What design precautions are necessary when using the ADS7815U with a split ±5V analog supply, especially regarding power sequencing and decoupling to avoid latch-up or ADC saturation?
The ADS7815U requires careful power sequencing when using ±5V analog supplies: both rails must ramp up within 100ms of each other to prevent internal ESD structures from forward-biasing, which can cause latch-up or erroneous conversions. Always power digital (5V) and analog (±5V) supplies simultaneously or ensure analog rails stabilize first. Use low-ESR ceramic capacitors (100nF) at each supply pin, placed as close as possible to the IC. Add a 10µF bulk capacitor on each rail to handle transient current demands during SAR conversion. Avoid hot-plugging or supply reversal, as the device lacks built-in protection. A power supervisor IC can enforce proper sequencing in critical designs.
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.
ADS7815U CAD Models
Texas Instruments ADS7815U PCB symbols & footprints
productDetail
