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Texas Instruments ADS1286UAG4
- Part No.:
- ADS1286UAG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADS1286UAG4.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,388
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Product details
Overview
The ADS1286UAG4 from Texas Instruments is a 12-bit, 20kHz SAR analog-to-digital converter with differential input, sample-and-hold amplifier, SPI/SSI-compatible serial interface, and micropower operation at 250µA typical supply current. It features guaranteed no missing codes, ±1 LSB integral linearity (for UL-grade), and operates over –40°C to +85°C in an 8-pin SOIC package - ideal for isolated remote data acquisition systems.
For engineers reviewing the ADS1286UAG4 datasheet, ADS1286UAG4 pinout, ADS1286UAG4 application, or ADS1286UAG4 equivalent, key selection criteria include its 20kHz sampling rate, 250µA quiescent current, 12-bit resolution with no missing codes, differential input architecture, and SOIC-8 packaging with industrial temperature range.
Technical Context
The ADS1286UAG4 implements a successive approximation register (SAR) ADC architecture with integrated sample-and-hold amplifier and CMOS-compatible digital interface. Its serial communication uses a synchronous 3-wire protocol (CS/SHDN, DCLOCK, DOUT), where data is output LSB-first after one null bit on the falling edge of DCLOCK.
It supports flexible reference voltage inputs from 1.25V to VCC+0.05V, exhibits 82dB power supply rejection, and achieves 72dB SINAD at 1kHz with 5Vp-p input. Conversion time is fixed at 12 clock cycles, and acquisition time is 1.5–2.0 clock cycles, enabling precise timing control in low-power embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 4096 discrete output levels with monotonic transfer function and guaranteed no missing codes. |
| Sampling Rate | 20 kHz maximum - supports real-time monitoring of fast-changing analog signals such as transducer outputs or sensor bursts. |
| Supply Current | 250 µA typical at 200 kHz clock - enables multi-year battery life in portable or remote sensing nodes. |
| Input Type | Differential (±In) - rejects common-mode noise and improves signal integrity in noisy industrial environments. |
| Reference Range | 1.25 V to VCC+0.05 V - allows flexible scaling of full-scale input range without external amplification. |
| Integral Linearity | ±1 LSB (ADS1286UL grade) - ensures accurate end-point accuracy critical for precision measurement applications. |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive under-hood or field-deployed equipment. |
| Digital Interface | SPI/SSI-compatible 3-wire serial - simplifies microcontroller integration with minimal GPIO usage and no parallel bus overhead. |
Pinout & Package
The ADS1286UAG4 is housed in an 8-pin SOIC (D) package per JEDEC MS-012, with standard 1.27 mm pitch and RoHS-compliant lead finish. Pin 1 is located at the top-left corner with notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VREF) | Reference voltage input | Defines full-scale analog input range; accepts 1.25–5.05 V; high-impedance node during shutdown. |
| 2 (+In) | Non-inverting analog input | Differential input terminal; accepts 0 to VREF with respect to –In; supports rail-to-rail common-mode range. |
| 3 (–In) | Inverting analog input | Differential input terminal; connects to system ground or remote sense point to reject common-mode interference. |
| 4 (GND) | Analog/digital ground | Single ground reference for analog and digital sections; requires low-impedance PCB connection to minimize noise coupling. |
| 5 (CS/SHDN) | Chip select / shutdown control | Active-low enable for conversion and serial output; logic-high forces full shutdown (3 µA max). |
| 6 (DOUT) | Serial data output | LSB-first 12-bit output; data valid on falling DCLOCK edge; tri-stated when CS is high. |
| 7 (DCLOCK) | Data clock input | Synchronizes serial data transfer and determines conversion speed; minimum pulse width 50 ns. |
| 8 (+VCC) | Power supply | +4.5 V to +5.25 V supply; powers analog and digital circuitry; bypass capacitor required at pin. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 250 µA typical supply current at 20 kHz sampling enables battery-powered deployments exceeding 5 years with coin-cell sources. |
| No missing codes guarantee | Ensures monotonicity across full 12-bit transfer function - essential for closed-loop control and calibration-critical instrumentation. |
| Differential input architecture | Rejects common-mode noise up to 82 dB PSRR and enables direct connection to bridge sensors or thermocouples without front-end amplifiers. |
| Auto-shutdown between conversions | Reduces average current draw proportionally to sampling rate - e.g., ~40 µA at 1.6 kHz - optimizing energy-per-sample efficiency. |
| Flexible reference support | Operates with reference voltages as low as 1.25 V while maintaining linearity, enabling high-resolution measurements on sub-5V systems. |
Applications
| Remote Data Acquisition | Isolated Data Acquisition |
|---|---|
Use Scenario: Wireless sensor nodes deployed in utility metering, environmental monitoring, or structural health sensing where power and space are constrained. IC Role / Device Role / Timing Role: Primary ADC capturing analog sensor outputs (e.g., pressure, humidity) and serially transmitting digitized data via low-power MCU interface. Use Value: 250 µA quiescent current and 20 kHz sampling allow rapid wake-up and burst acquisition without compromising battery life. | Use Scenario: Industrial PLC modules requiring galvanic isolation between field-side analog inputs and controller-side digital buses. IC Role / Device Role / Timing Role: Isolated-side ADC interfacing to isolated power and signal lines; communicates across opto- or capacitive isolators using 3-wire serial protocol. Use Value: Differential input and 82 dB PSRR suppress noise induced by isolation barriers and switching power supplies. |
| Transducer Interface | Battery-Operated Systems |
Use Scenario: Direct digitization of low-level outputs from load cells, strain gauges, or RTDs in portable test equipment or handheld instruments. IC Role / Device Role / Timing Role: Front-end ADC with built-in sample-and-hold, eliminating need for external S/H or driver op-amps in ratiometric configurations. Use Value: Guaranteed no missing codes and ±1 LSB INL ensure traceable metrology-grade accuracy without post-calibration linearization. | Use Scenario: Portable medical devices (e.g., ECG monitors, glucose meters) or IoT endpoints powered by single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Power-gated ADC activated only during measurement intervals; enters <3 µA shutdown state between samples. Use Value: Auto-shutdown and programmable sample rate reduce average current to <50 µA - extending operational life beyond 10,000 measurements per charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1286UA | Same SOIC-8 package, identical pinout and electrical specs; differs only in MSL rating (Level-2 vs Level-2-260C-1 YEAR) and tape/reel packaging. | Identical functional use; suitable for same PCB layout and firmware - differs only in moisture sensitivity handling and reel quantity (75 vs 2500). | Select ADS1286UAG4 for tube delivery and guaranteed MSL-2 compliance; choose ADS1286UA for large-volume tape-and-reel production. |
| ADS1286UB | Same package and pinout; ±2 LSB INL (vs ±1 LSB for UL-grade); otherwise identical timing, power, and interface behavior. | Acceptable for non-critical measurement where ±2 LSB linearity suffices; not recommended for metrology or calibration-critical paths. | Choose ADS1286UAG4 when ±1 LSB INL is required; ADS1286UB offers cost advantage where tighter linearity is unnecessary. |
Compared with ADS1286UA and ADS1286UB, the ADS1286UAG4 provides identical functionality and pin compatibility but is specifically marked and packaged for tube delivery with verified MSL-2 compliance - making it optimal for low-volume prototyping, qualification testing, and small-batch industrial builds requiring traceable handling.
Availability
The ADS1286UAG4 is available at Aetrix Electronics and suitable for remote data acquisition, isolated sensor interfaces, and battery-operated instrumentation requiring stable component supply across extended product lifecycles.
Supply support for ADS1286UAG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The ADS1286UAG4 belongs to TI's precision data converter portfolio, designed specifically for low-power, high-accuracy analog digitization in resource-constrained and electrically noisy environments.
FAQ
What is the operating temperature range of the ADS1286UAG4?
The ADS1286UAG4 is rated for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is confirmed in TI's Package Option Addendum and applies to all SOIC variants including ADS1286UAG4, ADS1286UA, and ADS1286UB. The device maintains specified performance - including 12-bit resolution, ±1 LSB INL, and 250 µA supply current - across this full range.
Does the ADS1286UAG4 support true differential input operation?
Yes, the ADS1286UAG4 supports true differential input operation via dedicated +In and –In pins. The full-scale input range is defined as (+In) – (–In), allowing rejection of common-mode noise and direct connection to differential sensors like Wheatstone bridges. Input common-mode voltage can range from –0.2 V to VCC+0.2 V, and the device guarantees no missing codes across the full 12-bit span under differential configuration.
What is the meaning of the "G4" suffix in ADS1286UAG4?
The "G4" suffix in ADS1286UAG4 denotes a specific packaging variant: tube delivery (75 units per tube), SOIC-8 package (D), and MSL Level-2-260°C-1 YEAR moisture sensitivity rating. It does not indicate a functional or electrical revision - ADS1286UAG4 shares identical specifications, pinout, and performance with ADS1286UA and ADS1286UB, differing only in packaging and labeling per TI's ordering nomenclature.
Can the ADS1286UAG4 operate with a 3.3V supply voltage?
No - the ADS1286UAG4 requires a +4.5 V to +5.25 V supply (VCC), as specified in Absolute Maximum Ratings and Electrical Characteristics tables. While the digital logic thresholds scale with VCC, the internal reference buffer, comparator, and SAR core are designed for 5V operation. Using 3.3V violates the minimum VCC specification and will result in undefined behavior, failed conversions, or permanent damage.
How does the ADS1286UAG4 achieve low power consumption during idle periods?
The ADS1286UAG4 achieves low idle power through hardware-controlled auto-shutdown: when CS/SHDN is driven high, the device disables bias circuits, powers down the comparator, places the reference input in high-impedance state, and reduces supply current to ≤3 µA. This shutdown state persists until CS falls again, enabling precise duty-cycle control and microamp-level average current in intermittent-sampling applications.
ADS1286UAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 20k
- Number of Inputs:
- 1
- Input Type:
- Differential
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1286UAG4 FAQ
1.How can I place an order for ADS1286UAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1286UAG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS1286UAG4 reliable?
The price and inventory of ADS1286UAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1286UAG4 is usually 5 days.
3.What payment methods are accepted for ADS1286UAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1286UAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1286UAG4?
ADS1286UAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1286UAG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS1286UAG4?
For technical support, including ADS1286UAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1286UAG4 requirements.
6.How does Aetrix verify that ADS1286UAG4 is sourced from the original manufacturer or authorized distributors?
All ADS1286UAG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS1286UAG4 meets industry standards.
7.What is the process for return or replacement of ADS1286UAG4?
All ADS1286UAG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1286UAG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS1286UAG4 part is unused and in its original packaging.
Return procedure for ADS1286UAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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