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Texas Instruments ADS8860IDGS
- Part No.:
- ADS8860IDGS
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS8860IDGS.pdf
- Description:
- IC ADC 16BIT SAR 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,691
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Product details
Overview
ADS8860IDGS from Texas Instruments is a 16-bit, 1-MSPS, single-ended input SAR analog-to-digital converter with SPI-compatible serial interface, 93 dB SNR, ±2.0 LSB max INL, and 5.5 mW power dissipation at full speed - deployed in precision instrumentation and battery-powered medical sensors.
For engineers reviewing the ADS8860IDGS datasheet, ADS8860IDGS pinout, ADS8860IDGS application, or ADS8860IDGS equivalent, this page delivers verified electrical specs, VSSOP-10 pin mapping, daisy-chain timing behavior, reference voltage independence (2.5 V to 5 V), and low-power operation down to 55 µW at 10 kSPS.
Technical Context
The ADS8860IDGS implements a successive approximation register (SAR) architecture with no latency output and full-scale step settling in 290 ns. Its unipolar single-ended input range (0 V to VREF) operates independently of AVDD, supporting reference voltages up to 5 V while AVDD remains as low as 2.7 V.
It supports three serial interface modes - 3-wire (CONVST as CS), 4-wire (DIN as CS), and daisy-chain - all synchronized to SCLK up to 66.6 MHz. The device enters automatic power-down between conversions, achieving 50 nA quiescent current on AVDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 15.26 ppm code resolution for high-accuracy DC and low-frequency signal digitization. |
| Sample rate | 1 MSPS - enables real-time capture of signals up to ~400 kHz (Nyquist-limited) without aliasing in anti-aliased systems. |
| SNR / THD | 93 dB / –108 dB - supports >15 ENOB at 1 kHz, suitable for precision measurement where harmonic distortion must be minimized. |
| INL (max) | ±2.0 LSB - ensures monotonicity and <0.003% full-scale linearity error across temperature (–40°C to +85°C). |
| Power @ 1 MSPS | 5.5 mW - enables integration into thermally constrained PCBs and extends battery life in portable instruments. |
| Reference range | 2.5 V to 5 V - allows direct interfacing to common precision references (e.g., REF5025, REF5050) without scaling circuitry. |
| AVDD / DVDD | 2.7–3.6 V / 1.65–3.6 V - supports dual-supply flexibility: DVDD can operate at 1.8 V logic while AVDD runs at 3.3 V for optimal noise performance. |
Pinout & Package
VSSOP-10 package (3.00 mm × 3.00 mm) with exposed thermal pad (not electrically connected); pin-compatible with ADS8860 variants in DRC (VSON-10) but requires distinct PCB layout due to different thermal pad grounding requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF | Analog reference input | Accepts 2.5 V–5 V external reference; decoupled with ≥10 µF capacitor; independent of AVDD supply rail. |
| AINP | Analog input (+) | Single-ended analog signal input; full-scale range = 0 V to VREF; input capacitance = 59 pF. |
| AINN | Analog input (–) | Ground-referenced return path for AINP; supports pseudo-differential rejection when used with external driver. |
| AVDD | Analog power supply | 2.7 V–3.6 V analog supply; requires 1-µF decoupling to GND; powers internal SAR core and reference buffer. |
| GND | Common analog/digital ground | Shared return for AVDD, DVDD, REF, and analog inputs; critical for minimizing PSRR degradation and ground bounce. |
| DVDD | Digital I/O supply | 1.65 V–3.6 V logic supply; powers SPI interface; decoupled with 1-µF capacitor; independent of AVDD. |
| CONVST | Convert start / chip select | Edge-triggered conversion initiator; doubles as CS in 3-wire mode; minimum pulse width = 10 ns. |
| DIN | Serial data input | Configures interface mode (CS vs daisy-chain) at conversion start; serves as CS in 4-wire mode. |
| DOUT | Serial data output | MSB-first, SCLK-synchronized output; tri-state controlled by CONVST or DIN depending on interface mode. |
| SCLK | Serial clock input | Up to 66.6 MHz; defines timing for data transfer; falling edge clocks valid data out on DOUT. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency output | Delivers final conversion result immediately after tconv (≤710 ns), eliminating pipeline delay for time-critical control loops. |
| SPI-compatible daisy-chain | Enables cascading of multiple ADS8860IDGS devices using single SCLK/DIN/DOUT lines - reduces host GPIO count and simplifies multi-channel synchronization. |
| Independent reference & supplies | REF (2.5–5 V), AVDD (2.7–3.6 V), and DVDD (1.65–3.6 V) operate independently - permits mixed-voltage system design and eliminates LDO dependency. |
| Low-power scaling | Power scales linearly with throughput: 5.5 mW @ 1 MSPS, 0.55 mW @ 100 kSPS, 55 µW @ 10 kSPS - ideal for duty-cycled sensor acquisition. |
| Full-scale settling | 290 ns to 16-bit accuracy - supports fast step-response measurements (e.g., relay contact bounce, pulse width analysis) without post-processing correction. |
Applications
| Automatic Test Equipment (ATE) | Instrumentation and Process Controls |
|---|---|
Use Scenario: High-speed parametric testing of semiconductor devices requiring sub-LSB repeatability across temperature. IC Role / Device Role / Timing Role: Primary digitizer capturing DC bias and transient response with no latency and minimal code-width variation. Use Value: ±2.0 LSB max INL and 93 dB SNR ensure pass/fail decisions meet Class A metrology standards without calibration drift compensation. |
Use Scenario: Analog sensor signal conditioning in PLC analog input modules with 4–20 mA loop interfaces. IC Role / Device Role / Timing Role: Precision front-end ADC converting isolated voltage outputs from signal conditioners into digital process values. Use Value: Independent 2.5–5 V REF input allows direct use of industrial-grade references, eliminating external gain stages and reducing BOM cost. |
| Precision Medical Equipment | Low-power, Battery-operated Instruments |
Use Scenario: ECG/EEG front-end digitization where baseline stability and harmonic distortion affect diagnostic accuracy. IC Role / Device Role / Timing Role: Single-ended ADC sampling biopotential signals at 1 MSPS with simultaneous noise rejection via CMRR >90 dB. Use Value: –108 dB THD prevents harmonic artifacts from masking low-amplitude neural waveforms during FFT-based analysis. |
Use Scenario: Portable gas analyzer using electrochemical sensors requiring microamp-level current measurement over 10+ hour runtime. IC Role / Device Role / Timing Role: Low-duty-cycle ADC acquiring sensor voltage at 10 kSPS only during active measurement bursts. Use Value: 55 µW power at 10 kSPS extends coin-cell lifetime by >3× versus comparable 16-bit SAR converters without dynamic power scaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution, low-power SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8864IDRC | 4-channel, 16-bit, 400 kSPS; shared reference; higher channel density but lower throughput per channel. | Preferred for multi-sensor synchronous sampling (e.g., vibration monitoring), not single-channel high-speed precision. | Select ADS8864IDRC when system requires ≥2 analog inputs with matched timing and shared REF, accepting 2.5× lower sample rate per channel. |
| AD7960BCPZ | 18-bit, 5 MSPS, pseudo-differential input; requires external reference buffer; 13.5 mW @ full speed. | Better resolution/speed trade-off for lab-grade digitizers; incompatible pinout and interface protocol (no daisy-chain). | Choose AD7960BCPZ only when 18-bit resolution and 5 MSPS are mandatory, and board redesign for new layout and reference buffering is acceptable. |
Compared with ADS8864IDRC and AD7960BCPZ, the ADS8860IDGS uniquely balances single-channel 1-MSPS throughput, ultra-low power scalability, and SPI daisy-chain capability - making it optimal for space-constrained, battery-aware, high-fidelity measurement nodes where pin compatibility and firmware reuse matter.
Availability
ADS8860IDGS is available at Aetrix Electronics and suitable for automatic test equipment, precision instrumentation, medical diagnostics, and portable sensor systems requiring stable component supply across extended production lifecycles.
Supply support for ADS8860IDGS 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 specializing in analog and embedded processing technologies, with leadership in precision data converters and low-power signal chain solutions.
The ADS8860IDGS belongs to TI's precision SAR ADC portfolio designed for high-accuracy, low-power, single-ended measurement applications - targeting instrumentation, medical, and portable test equipment where size, power, and DC performance are critical.
FAQ
What is the maximum SCLK frequency supported by the ADS8860IDGS?
The ADS8860IDGS supports SCLK frequencies up to 66.6 MHz in all interface modes (3-wire, 4-wire, daisy-chain). This allows full 16-bit readout within ≤250 ns per conversion cycle, enabling tight timing margins in deterministic real-time systems. The ADS8860IDGS datasheet specifies tSCLK = 15 ns minimum period, confirming 66.6 MHz as the absolute maximum reliable clock rate under recommended operating conditions.
Does the ADS8860IDGS require an external reference buffer?
No, the ADS8860IDGS does not require an external reference buffer. Its internal reference input stage accepts 2.5 V to 5 V directly with ≤300 µA dynamic current draw and 250 nA leakage, and is specified to operate stably with ≥10 µF ceramic decoupling. External buffering is only needed if the source impedance exceeds 1 Ω or long trace inductance introduces instability - not a requirement of the ADS8860IDGS itself.
Can the ADS8860IDGS operate with AVDD = 2.7 V and DVDD = 1.8 V simultaneously?
Yes, the ADS8860IDGS fully supports AVDD = 2.7 V and DVDD = 1.8 V concurrently. Its datasheet specifies AVDD range as 2.7–3.6 V and DVDD as 1.65–3.6 V (for SCLK < 40 MHz), with no coupling constraint between rails. This dual-supply configuration is validated for 1-MSPS operation and maintains full AC/DC specifications including 93 dB SNR and ±2.0 LSB INL.
What is the purpose of the AINN pin on the ADS8860IDGS?
The AINN pin on the ADS8860IDGS serves as the analog input return path and is internally tied to device ground. Though the ADS8860IDGS is a single-ended-input ADC, AINN provides a dedicated low-impedance return for AINP, improving PSRR and reducing common-mode noise coupling. It is not a differential input - the device does not perform true differential conversion - but proper AINN grounding is essential for achieving specified 90 dB CMRR and 80 dB PSRR performance.
How does power-down mode function in the ADS8860IDGS?
The ADS8860IDGS automatically enters power-down mode at the end of each conversion and remains there during acquisition, drawing only 50 nA from AVDD. No software command is required - the state machine manages entry/exit autonomously. Full functionality resumes within tACQ (290 ns) after the next CONVST pulse, making it transparent to host firmware and ideal for burst-mode sensing applications.
ADS8860IDGS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential, Single Ended
- 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:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8860IDGS FAQ
1.How can I place an order for ADS8860IDGS through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8860IDGS 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 ADS8860IDGS reliable?
The price and inventory of ADS8860IDGS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8860IDGS is usually 5 days.
3.What payment methods are accepted for ADS8860IDGS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8860IDGS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8860IDGS?
ADS8860IDGS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8860IDGS 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 ADS8860IDGS?
For technical support, including ADS8860IDGS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8860IDGS requirements.
6.How does Aetrix verify that ADS8860IDGS is sourced from the original manufacturer or authorized distributors?
All ADS8860IDGS 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 ADS8860IDGS meets industry standards.
7.What is the process for return or replacement of ADS8860IDGS?
All ADS8860IDGS units undergo pre-shipment inspection (PSI). If there is an issue with ADS8860IDGS, 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 ADS8860IDGS part is unused and in its original packaging.
Return procedure for ADS8860IDGS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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