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Texas Instruments ADS8867IDGS
- Part No.:
- ADS8867IDGS
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS8867IDGS.pdf
- Description:
- IC ADC 16BIT SAR 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,551
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Product details
Overview
ADS8867IDGS from Texas Instruments is a 16-bit, 100-kSPS, true-differential SAR analog-to-digital converter with SPI-compatible serial interface, 96 dB SNR, ±1.0 LSB INL, and 0.7 mW power dissipation at full speed - deployed in precision instrumentation, medical sensors, and low-power battery-operated measurement systems.
For engineers reviewing the ADS8867IDGS datasheet, ADS8867IDGS pinout, ADS8867IDGS application, or ADS8867IDGS equivalent, key selection criteria include true-differential input range (–VREF to +VREF), wide common-mode voltage support (0 V to VREF), 1200 ns full-scale settling time, and MSOP-10 package compatibility with daisy-chain and 3-/4-wire SPI modes.
Technical Context
The ADS8867IDGS implements a charge-redistribution SAR architecture with integrated sample-and-hold, enabling no-latency output and inherent linearity. Its true-differential input stage supports unipolar differential signals while rejecting common-mode noise up to 90 dB min across 0 V to VREF common-mode range.
Conversion is driven by an internal clock; external SCLK (up to 16 MHz) only controls serial data readout during acquisition phase. Power scales linearly with throughput - 70 µW at 10 kSPS, 0.7 mW at 100 kSPS - and automatic power-down occurs between conversions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with guaranteed no-missing-codes (NMC) performance - ensures monotonicity and full dynamic range utilization in closed-loop control. |
| Sample Rate | 100 kSPS maximum throughput - supports real-time monitoring of fast transients in sensor signal chains without interpolation. |
| SNR / THD | 96 dB SNR and –115 dB THD at 1 kHz - enables high-fidelity digitization of low-noise analog sources like strain gauges or thermopiles. |
| INL / DNL | ±1.0 LSB max INL and ±1.0 LSB max DNL - meets precision metrology requirements for calibration-grade measurements. |
| Input Range | True-differential: –VREF to +VREF; common-mode: 0 V to VREF - eliminates need for external level-shifting when interfacing with differential sensors. |
| Power Dissipation | 0.7 mW at 100 kSPS, 70 µW at 10 kSPS - suitable for energy-constrained portable instruments with variable sampling duty cycles. |
| Reference Range | 2.5 V to 5 V independent of AVDD - allows flexible system-level reference selection without supply rail coordination. |
Pinout & Package
ADS8867IDGS is housed in a 10-pin MSOP (DGS) package with exposed thermal pad. Pin assignments are validated per TI SBAS615A datasheet and optimized for low-noise analog layout: GND serves as shared analog/digital return, REF requires ≥10 µF decoupling, and thermal pad must be connected to PCB ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF | Reference input | Accepts 2.5 V–5 V external reference; drives internal capacitor array during conversion - requires low-ESR bulk capacitance (≥10 µF) and local 1 µF ceramic. |
| AINP / AINN | Differential analog inputs | True-differential pair supporting –VREF to +VREF swing; common-mode voltage range 0 V to VREF - enables direct connection to bridge sensors or isolated amplifiers. |
| AVDD | Analog supply | 2.7 V–3.6 V supply for analog core; must be decoupled to GND with 1 µF capacitor - separate from DVDD to minimize digital noise coupling. |
| DVDD | Digital supply | 1.65 V–3.6 V I/O supply; independent of AVDD - supports mixed-voltage host interfaces (e.g., 1.8 V FPGA with 3.3 V analog section). |
| CONVST | Conversion start | Edge-triggered command initiating sampling; doubles as chip select in 3-wire mode - timing-critical (min pulse width 10 ns) for deterministic acquisition. |
| DIN / DOUT / SCLK | SPI interface | CMOS-compatible 3-/4-wire or daisy-chain serial interface; SCLK up to 16 MHz - supports galvanic isolation or multi-device synchronization without additional logic. |
| GND | Common ground | Shared analog/digital reference plane; internal connection to REF return - must be low-impedance, star-point routed to avoid ground bounce. |
| Thermal Pad | Thermal path | Exposed copper pad on bottom; TI recommends soldering to PCB ground plane - reduces θJA to 151.9°C/W and improves long-term reliability. |
Key Features
| Feature | Design Value |
|---|---|
| True-differential input architecture | Supports –VREF to +VREF differential swing with 0 V to VREF common-mode range - eliminates external instrumentation amplifier stages for differential sensor interfaces. |
| No-latency output | Conversion result available immediately after tconv (500–8800 ns); no pipeline delay - critical for real-time feedback loops in motor control or active filtering. |
| SPI-compatible daisy-chain mode | Single SCLK/DOUT chain supports cascading multiple ADS8867IDGS devices - reduces GPIO count and PCB trace count in multi-channel data acquisition systems. |
| Scalable power consumption | Power drops linearly with sample rate (70 µW @ 10 kSPS, 0.7 mW @ 100 kSPS) - enables adaptive sampling strategies in battery-powered field instruments. |
| High CMRR and PSRR | 90 dB min CMRR and 80 dB PSRR - maintains accuracy in electrically noisy industrial environments with shared power rails or EMI-prone cabling. |
Applications
| Industrial Process Monitoring | Precision Medical Sensors |
|---|---|
Use Scenario: Continuous monitoring of pressure, temperature, and flow transducers in PLC-based control cabinets with 24 V DC power and ambient EMI. IC Role / Device Role / Timing Role: Primary ADC capturing 4–20 mA loop outputs via precision resistor; performs synchronized 100-kSPS sampling with no latency for PID execution. Use Value: ±1.0 LSB INL and 96 dB SNR ensure <0.01% full-scale error over temperature, meeting IEC 61000-6-2 immunity requirements without external calibration. | Use Scenario: Portable ECG/EEG front-end acquiring biopotential signals from dry electrodes with ultra-low power budget and strict size constraints. IC Role / Device Role / Timing Role: Differential ADC digitizing amplified bio-signal pairs; operates at 10 kSPS in low-power mode (70 µW) during standby, scaling to 100 kSPS during diagnostic capture. Use Value: True-differential input rejects electrode half-cell offset and motion artifacts; 0.7 mW max power extends single-charge battery life beyond 72 hours. |
| Battery-Operated Test Equipment | Automated Test Equipment (ATE) |
Use Scenario: Handheld multimeter or insulation resistance tester requiring 16-bit resolution, autoranging, and >10-hour battery life on two AA cells. IC Role / Device Role / Timing Role: Core ADC for DC voltage/current and AC RMS measurements; uses internal reference and auto-ranging via programmable gain amplifier (PGA) control. Use Value: 2.5 V–5 V reference flexibility allows optimal use of battery voltage headroom; 50 nA power-down current preserves charge during sleep intervals. | Use Scenario: Modular ATE slot card performing parallel channel digitization of DUT analog outputs under tight timing constraints and high channel density. IC Role / Device Role / Timing Role: One of eight ADS8867IDGS devices in daisy-chain configuration; CONVST edge triggers simultaneous sampling across all channels. Use Value: Daisy-chain SPI reduces FPGA pin count by 7× vs individual CS lines; 1200 ns settling guarantees 16-bit accuracy even with fast step inputs from switching DUTs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8865IDRC | Same 16-bit SAR architecture, 400 kSPS max, SON-10 package; higher speed but 1.5× higher power at 100 kSPS (1.05 mW) | Requires faster clock and tighter layout for stability; better suited for multi-channel burst-mode acquisition than continuous streaming | Select when throughput >100 kSPS is required and power budget allows +0.35 mW overhead |
| ADS8860IDGS | 16-bit SAR, 1 MSPS, MSOP-10; higher speed, larger aperture jitter (10 ps vs 5 ps), no daisy-chain mode | Lacks daisy-chain capability and has reduced CMRR (85 dB); requires external level-shifting for true-differential inputs | Choose for single-channel high-speed applications where daisy-chain and ultra-high CMRR are not needed |
Compared with ADS8867IDGS, ADS8865IDRC offers higher throughput at increased power cost and board space efficiency, while ADS8860IDGS sacrifices daisy-chain support and differential input integrity for raw speed - making ADS8867IDGS optimal for precision, multi-channel, low-power embedded systems.
Availability
ADS8867IDGS is available at Aetrix Electronics and suitable for industrial process monitoring, precision medical sensors, and battery-operated test equipment requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for ADS8867IDGS 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and industrial-grade IC design.
The ADS8867IDGS belongs to TI's 16-bit SAR ADC family targeting high-accuracy, low-power, and space-constrained applications - engineered for metrology-grade linearity, robust noise immunity, and seamless integration into sensor signal chains.
FAQ
What is the maximum supported SCLK frequency for ADS8867IDGS in 3-wire mode?
The ADS8867IDGS supports up to 16 MHz SCLK frequency in 3-wire mode, as specified in Table 1 of the SBAS615A datasheet. This allows serial readout completion within 1.024 µs (16 bits × 62.5 ns period), ensuring minimal bus occupancy during the acquisition phase of the ADS8867IDGS.
Does ADS8867IDGS require an external clock source for conversion?
No, ADS8867IDGS uses an internal conversion clock and does not require an external clock for sampling. The external SCLK is used solely for serial data readout after conversion completes. This simplifies system timing design and eliminates clock distribution skew concerns for the ADS8867IDGS.
Can ADS8867IDGS operate with a 2.5 V reference while AVDD is at 3.3 V?
Yes, ADS8867IDGS supports reference voltages from 2.5 V to 5 V independently of AVDD (2.7 V–3.6 V) and DVDD (1.65 V–3.6 V). A 2.5 V reference with 3.3 V AVDD is fully compliant and commonly used to maximize dynamic range in low-voltage sensor interfaces with the ADS8867IDGS.
What is the purpose of the thermal pad on the ADS8867IDGS MSOP-10 package?
The exposed thermal pad on the ADS8867IDGS DGS package provides a low-thermal-resistance path (θJA = 151.9°C/W) from the die to the PCB ground plane. Texas Instruments requires it to be soldered to a thermally robust copper area to maintain junction temperature within specification and ensure long-term reliability of the ADS8867IDGS.
How does the daisy-chain mode function on ADS8867IDGS?
Daisy-chain mode activates when DIN is low at the CONVST rising edge. In this mode, multiple ADS8867IDGS devices share one SCLK and DOUT line, with conversion results shifted out sequentially. This reduces host interface complexity and PCB routing for multi-channel systems using ADS8867IDGS.
ADS8867IDGS 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):
- 100k
- 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:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 1.65V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8867IDGS FAQ
1.How can I place an order for ADS8867IDGS through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8867IDGS 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 ADS8867IDGS reliable?
The price and inventory of ADS8867IDGS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8867IDGS is usually 5 days.
3.What payment methods are accepted for ADS8867IDGS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8867IDGS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8867IDGS?
ADS8867IDGS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8867IDGS 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 ADS8867IDGS?
For technical support, including ADS8867IDGS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8867IDGS requirements.
6.How does Aetrix verify that ADS8867IDGS is sourced from the original manufacturer or authorized distributors?
All ADS8867IDGS 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 ADS8867IDGS meets industry standards.
7.What is the process for return or replacement of ADS8867IDGS?
All ADS8867IDGS units undergo pre-shipment inspection (PSI). If there is an issue with ADS8867IDGS, 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 ADS8867IDGS part is unused and in its original packaging.
Return procedure for ADS8867IDGS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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