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ADS8866IDGS
Texas Instruments
IC ADC 16BIT SAR 10VSSOP
1217 Pcs New Original In Stock
16 Bit Analog to Digital Converter 1 Input 1 SAR 10-VSSOP
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ADS8866IDGS
Product Overview
1232366
DiGi Electronics Part Number
ADS8866IDGS-DGManufacturer
Texas Instruments
ADS8866IDGS
Description
IC ADC 16BIT SAR 10VSSOPInventory
1217 Pcs New Original In Stock
16 Bit Analog to Digital Converter 1 Input 1 SAR 10-VSSOP
Quantity
Minimum 1
Minimum 1
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ADS8866IDGS Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Tube
Series
microPOWER™
Product Status
Active
Number of Bits
16
Sampling Rate (Per Second)
100k
Number of Inputs
1
Input Type
Pseudo-Differential, Single Ended
Data Interface
SPI
Configuration
S/H-ADC
Ratio - S/H:ADC
1:1
Number of A/D Converters
1
Architecture
SAR
Reference Type
External
Voltage - Supply, Analog
2.7V ~ 3.6V
Voltage - Supply, Digital
1.65V ~ 3.6V
Features
-
Operating Temperature
-40°C ~ 85°C
Package / Case
10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Supplier Device Package
10-VSSOP
Mounting Type
Surface Mount
Base Product Number
ADS8866
Datasheet & Documents
Manufacturer Product Page
ADS8866IDGS Specifications
HTML Datasheet
ADS8866IDGS-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
ADS8866IDGS-DG
TEXTISADS8866IDGS
296-46502-5
2156-ADS8866IDGS
Standard Package
80
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Whenever I contact their support, I get quick and detailed responses.
de desembre 02, 2025
DiGi Electronics provides exceptional after-sales support that truly exceeds expectations.
de desembre 02, 2025
DiGi Electronics always offers transparent prices, making the entire buying process straightforward.
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Frequently Asked Questions (FAQ)
Can the ADS8866IDGS replace a 12-bit ADC like the ADS7828 in a low-power sensor interface without requiring major firmware or reference voltage changes?
Yes, the ADS8866IDGS can serve as a drop-in replacement for the ADS7828 in many low-power applications, but with important caveats. While both use an SPI interface and operate from similar supply ranges (ADS8866IDGS: 2.7V–3.6V analog, 1.65V–3.6V digital), the ADS8866IDGS is a 16-bit SAR ADC with an external reference requirement, unlike the ADS7828’s internal 2.5V reference. You’ll need to provide a stable external reference (e.g., REF5025) and ensure your signal conditioning supports the higher resolution. Additionally, the increased resolution may expose noise issues previously masked by the 12-bit system—verify layout and grounding. Firmware will require updates to handle 16-bit data packets, but timing and protocol compatibility simplify integration.
What are the key reliability risks when using the ADS8866IDGS in an industrial environment operating near its -40°C to 85°C limit, especially regarding reference stability and startup behavior?
Operating the ADS8866IDGS near its temperature extremes introduces two primary reliability risks: reference voltage drift and inconsistent startup timing. Since the ADC requires an external reference, any temperature-induced drift in your reference IC (e.g., bandgap vs. buried Zener types) will directly affect accuracy—consider using a precision reference like the REF3020 with low tempco (<10 ppm/°C). Additionally, at cold start (-40°C), power sequencing and digital I/O timing margins shrink; ensure your microcontroller meets VIH/VIL specs across temperature. The ADS8866IDGS itself is rated for the full range, but system-level validation under thermal cycling is essential. Also, verify MSL2 handling: exposure to ambient humidity before reflow can cause popcorning if not baked per J-STD-033.
How does the ADS8866IDGS compare to the Analog Devices AD7680 in terms of power efficiency and noise performance for battery-powered data logging applications?
The ADS8866IDGS holds an advantage in power efficiency over the AD7680 in low-duty-cycle logging applications due to its microPOWER™ architecture and lower active current (typically 220 µA at 100 kSPS vs. AD7680’s ~350 µA). However, the AD7680 includes an internal reference, simplifying design in space-constrained systems. In terms of noise, the ADS8866IDGS offers better effective resolution in clean environments thanks to its lower inherent noise floor, but this assumes a high-quality external reference and proper PCB layout. For battery-powered use, the ADS8866IDGS’s ability to operate down to 1.65V digital supply allows direct interfacing with low-voltage MCUs, reducing level-shifting complexity. If reference integration is critical, consider the ADS8860 (TI’s version with internal reference), but for optimized power and performance with external ref, the ADS8866IDGS is superior.
What design precautions are necessary when routing the analog input and SPI lines for the ADS8866IDGS on a mixed-signal PCB to avoid crosstalk and ensure 16-bit accuracy?
To maintain 16-bit performance with the ADS8866IDGS, strict analog-digital separation is required. Route the analog input (IN+ and IN-) as a tightly coupled differential pair (even in single-ended mode) with guard traces tied to AGND, and keep them away from digital signals—especially SCLK and SDI. Place the external reference capacitor (10 µF ceramic + 100 nF) as close as possible to the REFP pin. Use separate ground planes (AGND and DGND) connected at a single point near the ADC. The SPI lines should be length-matched and driven with series termination resistors (22–33 Ω) to reduce ringing, particularly if routing over 5 cm. Avoid running SPI traces parallel to the analog input. Also, power the ADS8866IDGS from a clean LDO with low output noise (<10 µV RMS), and decouple both AVDD and DVDD with 100 nF capacitors placed within 2 mm of the pins.
Is it safe to hot-swap or dynamically reconfigure the reference voltage input of the ADS8866IDGS during operation, such as switching between 2.5V and 4.096V references for dynamic range adjustment?
No, dynamically switching the reference voltage on the ADS8866IDGS during operation is not recommended and poses significant risks. The ADC is not designed for live reference changes—doing so can cause latch-up, invalid conversions, or long-term reliability degradation due to transient currents through the reference input ESD structures. If you need variable full-scale range, implement the switch *before* power-up using a multiplexer (e.g., TMUX1101) controlled by your MCU during initialization. Alternatively, use a programmable reference like the DAC8560 to set the reference voltage under software control, but ensure glitch energy during transitions is minimized and the ADS8866IDGS is deselected (CS high) during changes. Always validate such schemes with worst-case timing and transient analysis to avoid violating absolute maximum ratings.
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ADS8866IDGS CAD Models
Texas Instruments ADS8866IDGS PCB symbols & footprints
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