Counterfeit and defect prevention
Visual and packaging inspection
Electrical performance verification
Service Email:
[email protected]
>
ADS8684IDBTR
Texas Instruments
IC ADC 16BIT SAR 38TSSOP
16065 Pcs New Original In Stock
16 Bit Analog to Digital Converter 4 Input 1 SAR 38-TSSOP
Request Quote
(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (109 Ratings)
ADS8684IDBTR
Product Overview
1258438
DiGi Electronics Part Number
ADS8684IDBTR-DGManufacturer
Texas Instruments
ADS8684IDBTR
Description
IC ADC 16BIT SAR 38TSSOPInventory
16065 Pcs New Original In Stock
16 Bit Analog to Digital Converter 4 Input 1 SAR 38-TSSOP
CAD Models - PCB Symbols & Footprints
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
ADS8684IDBTR Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Number of Bits
16
Sampling Rate (Per Second)
500k
Number of Inputs
4
Input Type
Differential, Single Ended
Data Interface
SPI
Configuration
PGA-MUX-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
1.65V ~ 5.25V
Features
PGA
Operating Temperature
-40°C ~ 125°C
Package / Case
38-TFSOP (0.173", 4.40mm Width)
Supplier Device Package
38-TSSOP
Mounting Type
Surface Mount
Base Product Number
ADS8684
Datasheet & Documents
Manufacturer Product Page
ADS8684IDBTR Specifications
HTML Datasheet
ADS8684IDBTR-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
296-39875-6
ADS8684IDBTR-DG
296-39875-1
296-39875-2
-296-39875-1-DG
Standard Package
2,000
Alternative Parts
PART 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
價格透明且優惠，運送速度也非常快，我推薦給朋友們。
de desembre 02, 2025
I've never been disappointed with the performance of their products.
de desembre 02, 2025
Shopping here gives me peace of mind because I know I’ll get great quality at a lower price.
de desembre 02, 2025
Their logistics team ensures prompt delivery, making the entire purchasing process smooth and reliable.
de desembre 02, 2025
The speed of delivery from DiGi Electronics makes a significant difference in my operations.
de desembre 02, 2025
I’ve used their components in various demanding environments, and they’ve held up remarkably well.
Publish Evalution
Evalution Message
Please enter your review message.
Please post honest comments and do not post ilegal comments.
Frequently Asked Questions (FAQ)
Can the ADS8684IDBTR operate reliably in high-temperature industrial applications up to 125°C, and what PCB layout practices should be followed to ensure signal integrity under these conditions?
Yes, the ADS8684IDBTR is specified for operation from -40°C to 125°C, making it suitable for harsh industrial environments. However, maintaining signal integrity at maximum temperature requires careful PCB design. Use a solid ground plane, minimize trace lengths for analog inputs, and isolate analog and digital supply domains with ferrite beads. Ensure adequate thermal vias under the exposed pad (if present) to improve heat dissipation. Avoid placing heat-generating components nearby to prevent localized overheating, which could exceed junction temperature limits despite ambient ratings.
How does the internal PGA in the ADS8684IDBTR affect noise performance compared to external amplification, and when should I bypass it for better SNR?
The integrated PGA in the ADS8684IDBTR provides gain settings up to 8V/V, which helps match small input signals to the full-scale range, improving resolution. However, enabling the PGA also amplifies input-referred noise, potentially degrading SNR compared to using an external ultra-low-noise amplifier followed by a fixed-gain ADC. Bypass the internal PGA when input signals already span >50% of the ADC's input range or when ultra-high precision is required. For microvolt-level signals, evaluate if a discrete instrumentation amplifier (e.g., INA188) with lower 1/f noise offers better system-level performance than the ADS8684IDBTR’s internal PGA.
Is the ADS8684IDBTR a viable drop-in replacement for the MAX11044 or ADS8584S in an existing 16-bit data acquisition system, and what interface differences should be considered?
The ADS8684IDBTR is not a direct pin-to-pin replacement for the MAX11044 or ADS8584S due to differences in package (38-TSSOP vs. 48-QFP) and internal architecture—specifically, the ADS8584S includes multiple SAR cores and simultaneous sampling, while the ADS8684IDBTR uses a single SAR with a multiplexer. However, functionally, it can replace both in multiplexed applications requiring 16-bit resolution at 500kSPS. Key interface differences include SPI timing compatibility—verify SCLK frequency and mode (ADS8684IDBTR supports SPI modes 0 and 3)—and ensure the digital supply level (1.65V to 5.25V) matches the host controller. Also, note that MAX11044 uses internal reference only, whereas ADS8684IDBTR supports both internal and external references, allowing for improved accuracy with an external REF50xx device.
What are the risks of using the internal reference on the ADS8684IDBTR in a precision measurement system, and when should I use an external reference like the REF5040?
The internal reference on the ADS8684IDBTR simplifies design but has higher initial accuracy error (typically ±4.3 mV) and drift (~20ppm/°C) compared to precision external references. In high-accuracy or wide-temperature applications, this can introduce significant measurement drift. Use an external reference such as the REF5040 (0.05% initial accuracy, 3ppm/°C drift) when system-level accuracy must be better than ±0.1%. Also, the internal reference may be more susceptible to noise coupling from digital switching; an external reference with proper decoupling (10µF X7R + 100nF ceramic) improves stability. Switching to external reference mode requires updating CONF register settings and validating REF_EN bit configuration.
How does the multiplexed input structure of the ADS8684IDBTR impact crosstalk and settling time, and what design rules minimize channel-to-channel interference in high-impedance sensor applications?
The ADS8684IDBTR uses a single SAR ADC with an integrated mux and sample-and-hold, creating potential crosstalk during channel switching—especially with high-impedance source (>1kΩ). Fast switching between channels can leave residual charge from prior inputs, causing settling errors. To minimize this, ensure the analog front-end includes a low-output-impedance buffer (e.g., OPA4188) before the ADC inputs. Use the programmable delay between channel changes via SPI command to allow adequate acquisition time (recommended ≥1.5µs per channel at 500kSPS). For critical measurements, consider interposing dummy conversions between sensitive channels or oversampling. Also, avoid routing digital lines near analog traces to reduce charge injection coupling into inactive channels.
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.
ADS8684IDBTR CAD Models
Texas Instruments ADS8684IDBTR PCB symbols & footprints
productDetail
