My Inquiry
My Account
Texas Instruments ADS1286UC
- Part No.:
- ADS1286UC
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADS1286UC.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,758
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS1286UC 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 across –40°C to +85°C, making it suitable for isolated, remote, or battery-powered data acquisition systems.
For engineers reviewing the ADS1286UC datasheet, ADS1286UC pinout, ADS1286UC application, or ADS1286UC equivalent, key selection considerations include its guaranteed no-missing-codes performance, ±1 LSB integral linearity (UL grade), micropower shutdown mode, SOIC-8 package compatibility, and reference voltage flexibility down to 1.25V.
Technical Context
The ADS1286UC implements a successive approximation register (SAR) architecture with integrated sample-and-hold and comparator. Its serial interface uses DCLOCK-synchronized falling-edge data output and CS/SHDN-controlled enable/disable sequencing, supporting LSB-first 12-bit transfers after one null bit.
It features automatic power-down between conversions, reducing quiescent current to 3µA in shutdown mode. The device accepts reference voltages from 1.25V to VCC+0.05V and maintains specified linearity and noise performance across its full industrial temperature range.
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 acquisition of signals up to ~5 kHz small-signal bandwidth. |
| Supply Current | 250 µA typical at 5V - enables multi-year operation on coin-cell batteries in low-duty-cycle sensing nodes. |
| Integral Linearity | ±1 LSB (UL grade) - ensures <0.025% full-scale error for precision transducer interfacing. |
| Reference Range | 1.25 V to VCC+0.05 V - allows flexible scaling (e.g., 2.5V ref for 1.22 mV/LSB) while maintaining linearity. |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive under-hood environments without derating. |
| Interface | SPI/SSI-compatible 3-wire serial - interoperable with standard microcontroller peripherals using DCLOCK, DOUT, and CS/SHDN. |
Pinout & Package
ADS1286UC is housed in an 8-pin SOIC (D) package with 1.27 mm pitch, RoHS-compliant, MSL Level-3 (260°C, 168 hr), and marked "ADS 1286U C".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VREF | Reference voltage input - sets full-scale range; high-impedance node during conversion, draws ≤20 µA at 200 kHz clock. |
| 2 | +In | Non-inverting analog input - accepts differential signal up to VCC+0.3 V; 25 pF capacitance requires careful layout. |
| 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 input path. |
| 5 | CS/SHDN | Chip select / shutdown control - active-low enables conversion/data transfer; high forces 3 µA shutdown current. |
| 6 | DOUT | Serial data output - outputs 12-bit straight-binary word LSB-first on falling DCLOCK edges after null bit. |
| 7 | DCLOCK | Data clock input - synchronizes serial transfer; frequency determines conversion speed (fCLK = 16 × fSAMPLE). |
| 8 | +VCC | Power supply - accepts 4.5 V to 5.25 V; bypassing with 0.1 µF ceramic near pin is mandatory for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| No missing codes | Guaranteed over full temperature and supply range - eliminates code gaps critical for closed-loop control accuracy. |
| Micropower operation | 250 µA typical active current and 3 µA shutdown - extends battery life in portable instrumentation and wireless sensor nodes. |
| Differential input architecture | Rejects common-mode noise up to 82 dB PSRR - improves measurement integrity in electrically noisy industrial settings. |
| Flexible reference support | Operates with VREF as low as 1.25 V - enables higher effective resolution when paired with precision low-voltage references. |
| SOIC-8 industrial grade | –40°C to +85°C operating range with ±1 LSB linearity - meets requirements for DIN-rail controllers and field-mounted DAQ modules. |
Applications
| Remote Data Acquisition | Isolated Data Acquisition |
|---|---|
Use Scenario: Wireless sensor node measuring temperature and pressure in oil-field wellheads, powered by primary lithium battery. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog outputs from RTD and bridge sensors before RF transmission. Use Value: 250 µA quiescent current and automatic shutdown enable >5 years of operation; 20 kHz sampling captures transient events during valve actuation. |
Use Scenario: Medical patient monitor acquiring ECG and respiration signals across reinforced isolation barrier. IC Role / Device Role / Timing Role: Isolated-side ADC converting analog front-end outputs with galvanic separation from digital controller. Use Value: Differential input rejects common-mode noise induced by isolation transformers; SPI interface minimizes isolation channel count. |
| Transducer Interface | Battery-Operated Systems |
Use Scenario: Industrial weigh scale using load cell with 2 mV/V sensitivity, requiring 12-bit resolution over 10:1 dynamic range. IC Role / Device Role / Timing Role: High-accuracy ADC interfaced directly to instrumentation amplifier output, referenced to stable 2.5 V source. Use Value: ±1 LSB integral linearity ensures repeatability within 0.025% FS; low leakage (<1 µA) prevents gain drift in high-impedance signal chains. |
Use Scenario: Handheld multimeter with auto-ranging, dual-display, and USB charging - requiring ultra-low standby power. IC Role / Device Role / Timing Role: Core measurement ADC activated only during sampling bursts, then fully shut down until next trigger. Use Value: CS/SHDN pin enables hardware-controlled power gating; 3 µA shutdown current minimizes battery drain during idle periods. |
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 and pinout; ±2 LSB integral linearity (vs. ±1 LSB for UC); same –40°C to +85°C range. | Lower linearity spec suits cost-sensitive industrial controls where <0.05% FS error is acceptable. | Select ADS1286UA if system-level calibration compensates for linearity error and budget constraints dominate. |
| ADS1286UB | Identical package and temperature range; ±2 LSB integral linearity; NIPDAU lead finish vs. "Call TI" finish on UC. | Preferred for legacy assembly lines requiring known Pb-free finish; no electrical or performance distinction from UA. | Choose ADS1286UB when lead-finish compliance (e.g., J-STD-020 MSL-2) is mandated and ±2 LSB linearity is sufficient. |
Compared with ADS1286UC, ADS1286UA and ADS1286UB offer identical timing, interface, and power behavior but trade ±1 LSB linearity for broader production tolerance - making UC optimal for metrology-grade designs where first-pass accuracy is non-negotiable.
Availability
ADS1286UC is available at Aetrix Electronics and suitable for remote data acquisition, isolated sensor interfaces, and battery-operated instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ADS1286UC 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 its precision analog portfolio, emphasizing high-performance data converters, op amps, and interface ICs for industrial, medical, and test equipment.
The ADS1286UC belongs to the legacy Burr-Brown 12-bit SAR ADC family, designed specifically for low-power, isolated, and remote analog measurement applications where reliability and guaranteed monotonicity are essential.
FAQ
What is the maximum sampling rate supported by the ADS1286UC?
The ADS1286UC supports a maximum sampling rate of 20 kHz, as confirmed in the Electrical Characteristics table under "Maximum Sampling Frequency." This assumes fCLK = 200 kHz (16 × fSAMPLE) and operation within the full –40°C to +85°C temperature range. At lower clock frequencies or elevated temperatures, the achievable rate may decrease due to timing margin constraints.
Does the ADS1286UC require an external reference voltage?
Yes, the ADS1286UC requires an external reference voltage applied to the VREF pin. It accepts inputs from 1.25 V to VCC+0.05 V and does not include an internal reference. The reference directly defines full-scale range and impacts LSB size, noise contribution, and linearity - so a low-drift, low-noise source like REF5025 is recommended for high-accuracy applications using ADS1286UC.
How does the CS/SHDN pin function in the ADS1286UC?
In the ADS1286UC, the CS/SHDN pin serves dual functions: when driven LOW, it enables conversion and serial data transfer; when HIGH, it places the device in shutdown mode, reducing supply current to 3 µA. Unlike conventional chip-select logic, CS/SHDN is level-sensitive - no pulse width requirement - and automatically powers down bias circuits and the comparator after each conversion cycle.
What is the significance of the "C" suffix in ADS1286UC?
The "C" suffix in ADS1286UC denotes the UL-grade linearity specification: ±1 LSB integral linearity over the full –40°C to +85°C temperature range. This distinguishes it from "A" and "B" variants (±2 LSB) and "L" variants (±1 LSB but 0°C to +70°C). The "C" grade ensures highest accuracy for demanding industrial measurement applications using ADS1286UC.
Can the ADS1286UC operate with a 3.3V supply?
No, the ADS1286UC is specified only for +VCC = 4.5 V to 5.25 V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation at 3.3 V violates the minimum supply requirement and will result in undefined behavior, including failure to meet timing, linearity, or conversion accuracy specs. For 3.3 V systems, consider newer TI SAR ADCs such as ADS7953 or ADS8681 instead of ADS1286UC.
ADS1286UC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- -
ADS1286UC FAQ
1.How can I place an order for ADS1286UC through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1286UC 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 ADS1286UC reliable?
The price and inventory of ADS1286UC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1286UC is usually 5 days.
3.What payment methods are accepted for ADS1286UC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1286UC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1286UC?
ADS1286UC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1286UC 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 ADS1286UC?
For technical support, including ADS1286UC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1286UC requirements.
6.How does Aetrix verify that ADS1286UC is sourced from the original manufacturer or authorized distributors?
All ADS1286UC 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 ADS1286UC meets industry standards.
7.What is the process for return or replacement of ADS1286UC?
All ADS1286UC units undergo pre-shipment inspection (PSI). If there is an issue with ADS1286UC, 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 ADS1286UC part is unused and in its original packaging.
Return procedure for ADS1286UC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS1286UC Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
