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Texas Instruments ADS1286PL
- Part No.:
- ADS1286PL
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADS1286PL.pdf
- Description:
- IC ADC 12BIT SAR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,284
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Product details
Overview
ADS1286PL 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 features guaranteed no missing codes, ±1 LSB integral linearity, and operation over 0°C to +70°C. It is optimized for remote, isolated, or battery-powered data acquisition systems.
For engineers reviewing the ADS1286PL datasheet, ADS1286PL pinout, ADS1286PL application, or ADS1286PL equivalent, this page delivers verified technical context, package-specific timing and linearity specs, real-world use scenarios in transducer interfacing and isolated sensing, and two validated alternative options aligned with its micro-power, 12-bit SAR architecture and 8-pin mini-DIP footprint.
Technical Context
The ADS1286PL implements a successive approximation register (SAR) ADC architecture with integrated sample-and-hold amplifier and CMOS-compatible digital interface. Its conversion sequence is triggered by CS/SHDN falling edge, with data output enabled on the second DCLOCK pulse and 12-bit straight-binary result shifted out LSB-first after one null bit.
It supports flexible reference voltage operation from 1.25V to VCC+0.05V and achieves 72dB SINAD at 1kHz with 5Vp-p input. Power consumption scales with sampling rate via automatic shutdown between conversions - dropping to 3µA in shutdown mode - making it suitable for low-duty-cycle remote sensing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 4096 discrete output codes with monotonic transfer function and guaranteed no missing codes. |
| Sampling Rate | 20 kHz maximum - enables real-time capture of signals up to ~5 kHz small-signal bandwidth without aliasing. |
| Supply Current | 250 µA typical at 5V, 200 kHz clock - enables multi-year battery life in low-duty-cycle sensor nodes. |
| Integral Linearity | ±1 LSB (ADS1286PL grade) - ensures <0.025% full-scale error for precision measurement in industrial transducer interfaces. |
| Reference Range | 1.25 V to VCC+0.05 V - allows flexible scaling (e.g., 2.5V or 3.3V references) while maintaining 12-bit effective resolution. |
| Digital Interface | SPI/SSI-compatible 3-wire serial (CS/SHDN, DCLOCK, DOUT) - simplifies isolation design with minimal GPIO count and rail-to-rail logic compatibility. |
| Operating Temperature | 0°C to +70°C - qualified for commercial and industrial control environments where extended temperature range is not required. |
Pinout & Package
ADS1286PL is housed in an 8-pin plastic mini-DIP (PDIP) package (drawing 006), with through-hole mounting and 0.3-inch body width. Pin 1 is marked by a notch or dot; leads are tin-lead or lead-free per RoHS compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VREF | Reference voltage input - sets full-scale range; high-impedance node during shutdown; requires stable low-noise source. |
| 2 | +In | Non-inverting analog input - accepts differential signal with –In; supports rail-to-rail common-mode range up to VCC. |
| 3 | –In | Inverting analog input - used for true differential measurement or grounded for single-ended mode. |
| 4 | GND | Analog ground - must be star-connected to minimize noise coupling into sensitive analog front-end. |
| 5 | CS/SHDN | Chip select / shutdown control - active-low enables conversion; high forces full shutdown (3 µA quiescent). |
| 6 | DOUT | Serial data output - outputs 12-bit LSB-first data after null bit; valid on falling DCLOCK edge; tri-states when CS high. |
| 7 | DCLOCK | Data clock input - synchronizes serial transfer and determines conversion speed; max 200 kHz frequency. |
| 8 | +VCC | Power supply - 4.5 V to 5.25 V operation; bypass with 0.1 µF ceramic capacitor near pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 250 µA typical supply current enables >5-year battery life in 1-sample-per-second remote monitoring nodes. |
| Differential input with S/H | Integrated sample-and-hold eliminates external circuitry for anti-aliasing and improves noise rejection in noisy industrial settings. |
| No missing codes guarantee | Ensures monotonicity across full 12-bit range - critical for closed-loop control and position feedback applications. |
| 3-wire serial interface | Reduces isolation component count: only CS, DCLOCK, and DOUT require channel separation in opto- or capacitive-isolated designs. |
| Auto-shutdown between conversions | Current drops to 3 µA when CS is high - eliminates need for external power gating in intermittent-sampling architectures. |
Applications
| Remote Data Acquisition | Isolated Data Acquisition |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node measuring temperature, pressure, or humidity over long distances using RS-485 or LoRaWAN backhaul. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned transducer outputs; operates at 1–10 Hz sampling with deep sleep between conversions. Use Value: 250 µA active current and 3 µA shutdown current extend AA battery life beyond 5 years; 12-bit resolution captures sub-degree thermal changes. |
Use Scenario: High-voltage motor drive monitoring where phase current and bus voltage must be measured across 1 kV isolation barrier. IC Role / Device Role / Timing Role: Isolated-side ADC feeding data to isolated MCU via optocoupler or digital isolator; synchronized via isolated DCLOCK. Use Value: 3-wire interface minimizes isolator channel count; differential input rejects common-mode noise induced across isolation gap. |
| Transducer Interface | Battery-Operated Systems |
|
Use Scenario: Strain-gauge load cell or RTD-based weighing system requiring ratiometric measurement against stable reference. IC Role / Device Role / Timing Role: Precision front-end ADC accepting low-level mV outputs; uses internal S/H to freeze signal during conversion. Use Value: ±1 LSB INL and 72 dB SINAD ensure <0.025% measurement accuracy; programmable reference allows ratiometric scaling with excitation source. |
Use Scenario: Portable medical device (e.g., blood glucose meter or pulse oximeter) requiring low-power, high-accuracy analog sensing. IC Role / Device Role / Timing Role: Core ADC for analog front-end; powered from coin-cell or Li-ion; samples biopotential signals at ≤1 kHz. Use Value: Micropower operation extends runtime; guaranteed no missing codes prevents erroneous diagnostic thresholds; SOIC/DIP variants support manual assembly. |
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 |
|---|---|---|---|
| ADS1286UL | Same 12-bit SAR core, 20 kHz, 250 µA, but in 8-lead SOIC package and rated for –40°C to +85°C; ±1 LSB INL grade. | Preferred for automated PCB assembly and extended temperature environments; not pin-compatible with mini-DIP due to different footprint. | Select ADS1286UL when surface-mount assembly, wider temperature range, or tape-and-reel logistics are required. |
| ADS1286PA | Same 8-pin mini-DIP package and 0°C to +70°C range, but ±2 LSB INL grade and higher quiescent current (400 µA typ); no change in interface or timing. | Suitable for cost-sensitive applications where ±2 LSB linearity is acceptable (e.g., non-critical process monitoring). | Choose ADS1286PA only if budget constraints outweigh precision requirements and ADS1286PL's ±1 LSB performance is unnecessary. |
Compared with ADS1286UL and ADS1286PA, the ADS1286PL uniquely combines 8-pin mini-DIP through-hole packaging, ±1 LSB integral linearity, and 0°C to +70°C qualification - making it optimal for hand-assembled, precision-limited, commercial-temperature instrumentation where layout simplicity and proven reliability are prioritized over extended temp range or SMT scalability.
Availability
ADS1286PL is available at Aetrix Electronics and suitable for remote data acquisition, isolated sensing, and battery-operated systems requiring stable component supply, long-lifecycle support, and legacy-compatible through-hole packaging.
Supply support for ADS1286PL 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 product support, datasheets, and legacy manufacturing for precision analog ICs like the ADS1286 series.
The ADS1286PL belongs to TI's legacy precision SAR ADC product line, designed specifically for low-power, high-accuracy data acquisition in resource-constrained and electrically noisy environments - emphasizing micropower efficiency, differential input integrity, and robust serial communication.
FAQ
What is the maximum sampling rate supported by the ADS1286PL?
The ADS1286PL supports a maximum sampling rate of 20 kHz, as specified in its datasheet under "Maximum Sampling Frequency." This is achieved with a 200 kHz DCLOCK input (16 × fSAMPLE). At lower clock frequencies, the effective sampling rate decreases linearly - for example, at 100 kHz DCLOCK, the maximum rate is 6.25 kHz. The ADS1286PL maintains guaranteed 12-bit performance and no missing codes across its entire rated sampling range.
Does the ADS1286PL support single-ended input configuration?
Yes, the ADS1286PL supports single-ended operation by connecting the –In pin to analog ground while applying the signal to +In. Its differential input stage remains functional, and the full-scale range becomes 0 V to VREF. However, common-mode rejection and noise immunity are reduced compared to true differential mode. The device's absolute input voltage limits (–0.2 V to VCC + 0.2 V) still apply to both pins independently.
What is the meaning of the 'L' suffix in ADS1286PL?
The 'L' suffix in ADS1286PL denotes the ±1 LSB integral linearity grade - a tighter specification than the standard ±2 LSB grade (e.g., ADS1286P). This grade is confirmed in the "PACKAGE" table of the datasheet, where ADS1286PL is explicitly listed with ±1 LSB linearity and 0°C to +70°C temperature range in the 8-pin plastic DIP package. It reflects factory-tested performance, not a functional variant.
Can the ADS1286PL operate with a 3.3V supply and reference?
Yes, the ADS1286PL supports VCC from +4.5 V to +5.25 V and VREF from +1.25 V to VCC + 0.05 V. While it is not rated for 3.3V VCC, it can accept a 3.3V reference voltage (e.g., REF3333) with +5V VCC. Using 3.3V VCC would violate the absolute minimum supply rating and is not guaranteed to meet specifications. For true 3.3V systems, consider newer TI SAR ADCs like the ADS7953.
How does the ADS1286PL handle power-down mode, and what is its shutdown current?
The ADS1286PL enters full shutdown mode when the CS/SHDN pin is driven high, disabling the bias circuit, comparator, and reference input buffer. In this state, supply current drops to 3 µA maximum (typical 1.5 µA), as specified in the "POWER SUPPLY REQUIREMENTS" section. Recovery time from shutdown is negligible - conversion begins on the next CS falling edge. This feature enables ultra-low average power in duty-cycled applications.
ADS1286PL 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:
- -
ADS1286PL FAQ
1.How can I place an order for ADS1286PL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1286PL 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 ADS1286PL reliable?
The price and inventory of ADS1286PL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1286PL is usually 5 days.
3.What payment methods are accepted for ADS1286PL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1286PL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1286PL?
ADS1286PL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1286PL 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 ADS1286PL?
For technical support, including ADS1286PL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1286PL requirements.
6.How does Aetrix verify that ADS1286PL is sourced from the original manufacturer or authorized distributors?
All ADS1286PL 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 ADS1286PL meets industry standards.
7.What is the process for return or replacement of ADS1286PL?
All ADS1286PL units undergo pre-shipment inspection (PSI). If there is an issue with ADS1286PL, 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 ADS1286PL part is unused and in its original packaging.
Return procedure for ADS1286PL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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