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Texas Instruments ADS1286P
- Part No.:
- ADS1286P
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADS1286P.pdf
- Description:
- IC ADC 12BIT SAR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,671
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Product details
Overview
ADS1286P from Texas Instruments (formerly Burr-Brown) is a 12-bit, 20kHz SAR analog-to-digital converter with differential input, sample-and-hold amplifier, and SPI/SSI-compatible 3-wire serial interface. It consumes only 250µA typical supply current at 5V and operates over 0°C to +70°C. Its micropower operation and two-wire serial capability make it suitable for remote sensor interfaces and isolated data acquisition systems.
For engineers reviewing the ADS1286P datasheet, ADS1286P pinout, ADS1286P application, or ADS1286P equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative parts - all grounded in the official SBAS053 datasheet and TI package documentation.
Technical Context
The ADS1286P implements a successive approximation register (SAR) architecture with integrated sample-and-hold and comparator. It supports synchronous serial communication via CS/SHDN, DCLOCK, and DOUT lines, requiring only three wires for full bidirectional control and data transfer.
It features guaranteed no missing codes over its full 12-bit range, ±2 LSB integral linearity (typical), and automatic shutdown between conversions - reducing quiescent current to 3µA when CS is high. Reference input supports 1.25V to VCC+0.05V, enabling flexible scaling for transducer signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 4096 discrete output codes with monotonic transfer function and no missing codes. |
| Sampling Rate | 20 kHz maximum - supports real-time monitoring of fast-changing analog signals such as vibration or audio-band sensor outputs. |
| Supply Current | 250 µA typical at 5V/12.5 kHz - enables multi-year battery life in portable instrumentation and remote nodes. |
| Input Type | Differential (±In) - rejects common-mode noise up to 82 dB PSRR, critical for noisy industrial environments. |
| Reference Range | 1.25 V to 5.25 V - allows direct interfacing with precision voltage references or scaled sensor excitation sources. |
| Operating Temp | 0°C to +70°C - qualified for commercial and industrial control applications without extended temperature derating. |
| Interface | SPI/SSI-compatible 3-wire serial (CS/SHDN, DCLOCK, DOUT) - simplifies isolation barrier design using digital optocouplers or capacitive isolators. |
Pinout & Package
ADS1286P is housed in an 8-pin plastic mini-DIP (PDIP) package per drawing 006, with through-hole mounting and 0.3-inch body width. Pin spacing is 0.1 inch, compatible with standard prototyping and production PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VREF | Reference voltage input - sets full-scale range; accepts 1.25V–5.25V; high-impedance node during shutdown. |
| 2 | +In | Non-inverting analog input - differential pair with –In; supports rail-to-rail input within ±0.2V of supply rails. |
| 3 | –In | Inverting analog input - connects to system ground or remote sense point to reject common-mode interference. |
| 4 | GND | Analog ground reference - must be tied to clean low-impedance ground plane to minimize noise coupling into ADC core. |
| 5 | CS/SHDN | Chip select / shutdown control - active-low enables conversion and serial output; high forces 3µA power-down mode. |
| 6 | DOUT | Serial data output - 12-bit straight-binary word, valid on falling edge of DCLOCK; tri-states when CS is high. |
| 7 | DCLOCK | Data clock input - synchronizes serial transfer and determines conversion speed; fCLK = 16 × fSAMPLE typical. |
| 8 | +VCC | Power supply - 4.5V to 5.25V operation; bypassing with 0.1µF ceramic capacitor at pin is mandatory for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| No missing codes | Guaranteed over full 12-bit range - eliminates data gaps in control loops or calibration-critical measurement systems. |
| Micropower sampling | 250 µA typical at 12.5 kHz - reduces thermal drift and extends battery life in handheld meters and wireless sensors. |
| Auto-shutdown | Current drops to 3 µA between conversions - eliminates need for external power gating in low-duty-cycle applications. |
| Differential input | Rejects common-mode noise up to 82 dB - enables accurate readings from bridge sensors or thermocouples in EMI-heavy settings. |
| Flexible reference | 1.25V–5.25V VREF range - permits use of low-voltage references to improve resolution for small-signal transducers. |
Applications
| Remote Data Acquisition | Isolated Data Acquisition |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and pressure in unattended field locations. IC Role / Device Role / Timing Role: Primary ADC converting conditioned analog outputs from multiple sensors into digital data for low-power MCU transmission. Use Value: 250 µA quiescent current and auto-shutdown enable >5-year battery life; 3-wire interface minimizes isolation component count. |
Use Scenario: Industrial PLC analog input module acquiring 4–20 mA loop signals across galvanic isolation barriers. IC Role / Device Role / Timing Role: Isolated-side ADC digitizing sensor signals after optocoupler or capacitive isolator level-shifting. Use Value: Differential input rejects ground-loop noise; CMOS logic levels ensure compatibility with isolated digital interfaces. |
| Transducer Interface | Battery Operated Systems |
|
Use Scenario: Precision load cell or strain gauge measurement in portable weighing equipment with 0.01% accuracy requirement. IC Role / Device Role / Timing Role: High-linearity ADC front-end capturing mV-level bridge outputs with minimal offset and gain error. Use Value: ±2 LSB integral linearity and <50 µVrms noise support sub-LSB repeatability; VREF flexibility allows matched excitation scaling. |
Use Scenario: Handheld multimeter or portable oscilloscope capturing AC/DC voltage and current waveforms. IC Role / Device Role / Timing Role: Core sampling ADC feeding real-time waveform processing engine in ultra-low-power microcontroller. Use Value: 20 kHz sampling rate captures 5 kHz fundamentals; 12-bit resolution provides >70 dB SINAD for clean display rendering. |
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 |
|---|---|---|---|
| ADS1286U | Same silicon, SOIC-8 package instead of PDIP; identical electrical specs and timing. | Preferred for surface-mount production; requires reflow-compatible layout but same signal integrity and performance. | Select ADS1286U for automated assembly; ADS1286P remains optimal for prototyping, through-hole boards, or legacy DIP footprints. |
| ADS1015IDGSR | 12-bit delta-sigma ADC with I²C interface; 3.3V-only supply; internal PGA; lower sampling rate (max 3.3 kSPS). | Better suited for low-speed, high-resolution sensor reading (e.g., thermistors); lacks differential sampling speed and SPI simplicity. | Choose ADS1015IDGSR only if I²C bus availability, internal gain, or ultra-low power (<200 µA) at sub-kHz rates outweighs need for 20 kHz throughput. |
Compared with ADS1286U and ADS1015IDGSR, the ADS1286P offers unique value in through-hole deployability, 20 kHz sampling with guaranteed no missing codes, and minimal interface overhead - making it irreplaceable in cost-sensitive, high-reliability remote sensing where layout simplicity and long-term serviceability matter.
Availability
ADS1286P 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 ADS1286P 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 acquired Burr-Brown in 2000 and maintains full technical support, manufacturing, and quality assurance for legacy precision analog products including the ADS1286 series.
The ADS1286P belongs to TI's precision SAR ADC product line, designed specifically for low-power, high-accuracy data acquisition in resource-constrained embedded systems where reliability and long-term availability are critical.
FAQ
What is the maximum sampling rate of the ADS1286P?
The ADS1286P supports a maximum sampling rate of 20 kHz, as specified in the SBAS053 datasheet under Timing Characteristics. This rate assumes fCLK = 200 kHz (16 × fSAMPLE) and is achievable across the full operating temperature range of 0°C to +70°C. The actual sustained rate depends on clock stability and proper CS timing - tCSD = 0 ns and tSUCS ≥ 30 ns must be observed.
Does the ADS1286P require an external reference voltage?
Yes, the ADS1286P requires an external reference voltage applied to the VREF pin. It accepts 1.25 V to 5.25 V, with optimal performance at 5.0 V per the datasheet test conditions. Using a lower reference improves resolution for small signals but increases sensitivity to offset and noise - the ADS1286P does not include an internal reference.
What package type is used for the ADS1286P?
The ADS1286P uses an 8-pin plastic mini-DIP (dual in-line package) with 0.3-inch body width and 0.1-inch pin pitch, per TI drawing number 006. This through-hole package is distinct from the SOIC-8 variants (e.g., ADS1286U) and is optimized for prototyping, repairability, and legacy board compatibility.
How does the ADS1286P handle power-down mode?
The ADS1286P enters power-down mode when the CS/SHDN pin is driven high, reducing supply current to 3 µA typical. During shutdown, the reference input becomes high-impedance, and the comparator and bias circuits disable. Conversion resumes automatically on the next CS low pulse - no reset sequence is required.
Is the ADS1286P pin-compatible with other members of the ADS1286 family?
Yes, all ADS1286 variants - including ADS1286P, ADS1286U, ADS1286PA, and ADS1286UA - share identical pinouts and electrical behavior. Differences are limited to temperature grade (0°C–70°C vs –40°C–85°C) and package (PDIP vs SOIC). The ADS1286P pinout matches the 8-pin mini-DIP configuration shown in Figure 1 of SBAS053.
ADS1286P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
ADS1286P FAQ
1.How can I place an order for ADS1286P through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1286P 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 ADS1286P reliable?
The price and inventory of ADS1286P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1286P is usually 5 days.
3.What payment methods are accepted for ADS1286P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1286P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1286P?
ADS1286P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1286P 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 ADS1286P?
For technical support, including ADS1286P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1286P requirements.
6.How does Aetrix verify that ADS1286P is sourced from the original manufacturer or authorized distributors?
All ADS1286P 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 ADS1286P meets industry standards.
7.What is the process for return or replacement of ADS1286P?
All ADS1286P units undergo pre-shipment inspection (PSI). If there is an issue with ADS1286P, 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 ADS1286P part is unused and in its original packaging.
Return procedure for ADS1286P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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