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ADS5281IRGCT
Texas Instruments
IC ADC 12BIT PIPELINED 64VQFN
2211 Pcs New Original In Stock
12 Bit Analog to Digital Converter 8 Input 8 Pipelined 64-VQFN (9x9)
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5.0 / 5.0
- (73 Ratings)
ADS5281IRGCT
Product Overview
1381329
DiGi Electronics Part Number
ADS5281IRGCT-DGManufacturer
Texas Instruments
ADS5281IRGCT
Description
IC ADC 12BIT PIPELINED 64VQFNInventory
2211 Pcs New Original In Stock
12 Bit Analog to Digital Converter 8 Input 8 Pipelined 64-VQFN (9x9)
Quantity
Minimum 1
Minimum 1
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ADS5281IRGCT Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Number of Bits
12
Sampling Rate (Per Second)
50M
Number of Inputs
8
Input Type
Differential
Data Interface
LVDS - Serial, SPI
Configuration
S/H-ADC
Ratio - S/H:ADC
1:1
Number of A/D Converters
8
Architecture
Pipelined
Reference Type
External, Internal
Voltage - Supply, Analog
3V ~ 3.6V
Voltage - Supply, Digital
1.7V ~ 1.9V
Features
Simultaneous Sampling
Operating Temperature
-40°C ~ 85°C
Package / Case
64-VFQFN Exposed Pad
Supplier Device Package
64-VQFN (9x9)
Mounting Type
Surface Mount
Base Product Number
ADS5281
Datasheet & Documents
Manufacturer Product Page
ADS5281IRGCT Specifications
HTML Datasheet
ADS5281IRGCT-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
ADS5281IRGCTG4
296-23307-6-NDR
-ADS5281IRGCT-NDR
296-23307-1-NDR
-ADS5281IRGCTG4
296-23307-6
296-23307-2
-ADS5281IRGCTG4-NDR
-296-23307-1-NDR
296-23307-1
296-23307-2-NDR
-296-23307-1-DG
ADS5281IRGCTG4-DG
Standard Package
250
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
Their attractive pricing makes technology more accessible for everyone.
de desembre 02, 2025
Their website’s user experience is excellent, enhancing overall satisfaction with every visit.
de desembre 02, 2025
The consistent delivery schedule gives me confidence in shopping with them repeatedly.
de desembre 02, 2025
The customer service at DiGi Electronics is exceptional; their team is always attentive and eager to help with any inquiries.
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Frequently Asked Questions (FAQ)
Can the ADS5281IRGCT be safely used in a multi-board system where analog and digital grounds are separated, and how should I handle the exposed pad and LVDS return paths to avoid ground loops or noise coupling?
Yes, the ADS5281IRGCT can be used in split-ground systems, but careful layout is critical. The exposed pad must be connected to the analog ground plane with multiple vias to ensure thermal and electrical stability, as it is internally bonded to the analog ground. For LVDS signals, maintain a continuous reference plane (preferably analog ground) beneath the differential pairs and avoid crossing ground splits. Use a single-point ground connection between analog and digital grounds near the power supply to minimize ground loops. Failure to properly manage return currents can lead to increased jitter and SNR degradation, especially at 50 MSPS.
What are the key risks when replacing the ADS5281IRGCT with a lower-cost 12-bit ADC like the AD9230BCPZ-50 in an 8-channel simultaneous sampling application, and how do their input architectures differ in real-world performance?
Replacing the ADS5281IRGCT with the AD9230BCPZ-50 introduces significant functional and performance risks. The ADS5281IRGCT features true simultaneous sampling across all 8 channels via individual sample-and-hold circuits (1:1 S/H:ADC ratio), while the AD9230BCPZ-50 is a single-channel ADC requiring external multiplexing, introducing channel-to-channel skew and timing uncertainty. Additionally, the AD9230 lacks integrated LVDS outputs and requires separate level translation, increasing design complexity and noise susceptibility. In time-synchronized applications like beamforming or power monitoring, this skew can cause measurement errors exceeding 1 LSB, making the substitution unsuitable despite similar nominal resolution and speed.
How does the internal reference of the ADS5281IRGCT compare to using a high-precision external reference like the REF5025 in terms of long-term drift and system calibration overhead, and when is each approach justified?
The ADS5281IRGCT’s internal reference is convenient but has higher drift (~30 ppm/°C typical) compared to the REF5025 (~3 ppm/°C). In temperature-varying environments or high-accuracy applications (e.g., medical instrumentation or precision test equipment), using the REF5025 with the ADS5281IRGCT’s external reference mode reduces gain error drift by an order of magnitude. However, this adds cost, board space, and requires careful decoupling and layout. If your system undergoes periodic calibration or operates in a stable thermal environment, the internal reference may suffice. For mission-critical measurements without frequent recalibration, the external reference is strongly recommended to maintain accuracy over time and temperature.
What layout and decoupling strategies are essential to maintain SNR performance when routing the 8 differential analog inputs of the ADS5281IRGCT on a 4-layer PCB with mixed digital signals nearby?
To preserve SNR on the ADS5281IRGCT, route all 8 differential analog input pairs as tightly coupled, length-matched microstrips on an inner layer with a solid analog ground plane directly beneath. Maintain at least 3x trace width spacing from digital signals (especially SPI or clock lines) to minimize crosstalk. Use individual 10 nF + 1 µF ceramic capacitors at each analog supply pin (AVDD), placed as close as possible to the pins, with a single bulk capacitor (10 µF) near the package. Avoid vias in the signal path, and ensure the digital return currents do not flow under the analog input traces. Poor decoupling or improper routing can degrade SNR by 6–10 dB, particularly at higher input frequencies near the Nyquist limit.
Is the ADS5281IRGCT suitable for operation in an industrial motor drive environment with high EMI, and what additional filtering or shielding techniques are needed to ensure reliable 12-bit performance?
The ADS5281IRGCT can be used in industrial motor drive environments, but requires robust EMI mitigation due to its high-speed LVDS interface and sensitive analog front-end. Implement π-filters or RC low-pass filters (cutoff ~10 MHz) on each analog input to suppress high-frequency noise from PWM sources. Enclose the ADC and input circuitry in a grounded metal shield, and use common-mode chokes on LVDS lines if routing over long distances. Ensure the 1.8V digital supply is clean and isolated from noisy digital rails using an LDO with good PSRR. Without these measures, conducted and radiated EMI can introduce spurious tones or increase DNL errors, compromising effective resolution in current sensing or encoder feedback applications.
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ADS5281IRGCT CAD Models
Texas Instruments ADS5281IRGCT PCB symbols & footprints
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