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Texas Instruments ADS8864IDGS
- Part No.:
- ADS8864IDGS
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS8864IDGS.pdf
- Description:
- IC ADC 16BIT SAR 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:134
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Product details
Overview
ADS8864IDGS from Texas Instruments is a 16-bit, 400-kSPS, single-ended input SAR analog-to-digital converter with SPI-compatible serial interface, 93 dB SNR, ±2.0 LSB max INL, and 2.6 mW power dissipation at full speed-designed for precision data acquisition in battery-powered instrumentation and ATE systems.
For engineers reviewing the ADS8864IDGS datasheet, ADS8864IDGS pinout, ADS8864IDGS application, or ADS8864IDGS equivalent, this page delivers verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options for low-power, high-accuracy ADC selection.
Technical Context
The ADS8864IDGS implements a successive approximation register (SAR) architecture with no latency output and full-scale step settling to 16 bits in 1200 ns. It supports unipolar single-ended inputs from 0 V to VREF (2.5 V–5 V), independent of AVDD (2.7 V–3.6 V) and DVDD (1.65 V–3.6 V).
Its SPI-compatible serial interface offers three operational modes-3-wire CS, 4-wire CS, and daisy-chain-with optional busy-indicator bit for host synchronization. Conversion is triggered by CONVST, and power consumption scales linearly with throughput (65 µW at 10 kSPS).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit-guarantees monotonicity and no missing codes (NMC) across full temperature range. |
| Sample Rate | 400 kSPS maximum-enables real-time capture of signals up to ~100 kHz bandwidth with >93 dB SNR. |
| INL | ±2.0 LSB (max)-limits absolute accuracy error to <±0.003% of full scale at 5 V reference. |
| SNR | 93 dB (typ, 1 kHz, VREF = 5 V)-supports >15.2 ENOB for high-fidelity signal reconstruction. |
| Power Dissipation | 2.6 mW at 400 kSPS-enables continuous operation in thermally constrained, battery-powered designs. |
| Reference Range | 2.5 V to 5 V-permits direct interfacing with common precision references without external scaling. |
| Supply Independence | AVDD (2.7–3.6 V), DVDD (1.65–3.6 V), REF (2.5–5 V) operate independently-simplifies mixed-supply system design. |
Pinout & Package
VSSOP-10 package (3.00 mm × 3.00 mm) with exposed thermal pad not connected in DGS variant; RoHS-compliant, surface-mountable, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF | Analog reference input | Accepts 2.5–5 V external reference; decoupled with ≥10 µF capacitor for noise immunity and stability. |
| AINP | Analog input (+) | Single-ended input node; operates over –0.1 V to VREF + 0.1 V with 59 pF input capacitance. |
| AINN | Analog input (–) | Ground-referenced return path; internally tied to GND-used only for common-mode rejection, not differential input. |
| AVDD | Analog supply | 2.7–3.6 V analog rail; requires 1-µF decoupling to GND to maintain AC performance. |
| DVDD | Digital I/O supply | 1.65–3.6 V logic rail; independent of AVDD, enabling level-shifting with host microcontrollers. |
| GND | Common ground | Shared analog/digital reference plane; internal connection to REF return and thermal pad (DRC only). |
| CONVST | Convert start / CS | Edge-triggered conversion initiator; doubles as chip select in 3-wire mode (twh-CNV ≥10 ns). |
| DIN | Serial data input | Configures interface mode at conversion start; serves as CS in 4-wire mode with tsu-DI-CNV ≥7.5 ns. |
| DOUT | Serial data output | MSB-first, SCLK-synchronized output; transitions valid 13.4 ns after SCLK falling edge (td-CK-DO). |
| SCLK | Serial clock input | Supports up to 66.6 MHz; duty cycle 45–55%; controls data timing in all interface modes. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency output | Delivers conversion result immediately after completion-eliminates pipeline delay for deterministic timing control. |
| Daisy-chain capability | Enables cascading of multiple ADS8864IDGS devices on one SPI bus without additional GPIO or address decoding. |
| Ultra-low power-down current | 50 nA AVDD quiescent draw-preserves battery life during idle periods in portable instrumentation. |
| Independent reference & supplies | REF voltage may exceed AVDD (e.g., 5 V REF with 3 V AVDD), removing need for reference buffers or LDOs. |
| Full-scale step settling | 1200 ns to 16-bit accuracy-ensures accurate sampling of fast transients without post-conversion correction. |
Applications
| Automatic Test Equipment (ATE) | Portable Precision Medical Devices |
|---|---|
Use Scenario: High-accuracy voltage measurement in modular ATE channel cards requiring synchronized multi-channel sampling. IC Role / Device Role / Timing Role: Primary data acquisition front-end with deterministic 400-kSPS throughput and no-latency output for real-time pass/fail decision logic. Use Value: ±2.0 LSB INL and 93 dB SNR enable sub-0.01% measurement fidelity across temperature, reducing calibration overhead. |
Use Scenario: ECG/EEG signal digitization in handheld diagnostic tools where battery life and signal integrity are critical. IC Role / Device Role / Timing Role: Low-noise, single-ended ADC interfaced directly to op-amp sensor front-end; powered from 3.3 V rail with 65 µW standby draw. Use Value: 2.5–5 V reference flexibility allows use of ultra-stable 2.5 V bandgap or low-noise 4.096 V reference to optimize dynamic range for biopotential signals. |
| Industrial Process Monitoring | Low-Power Data Loggers |
Use Scenario: 4–20 mA loop-powered sensor interface in harsh industrial environments with wide ambient temperature variation. IC Role / Device Role / Timing Role: Precision ADC capturing conditioned analog outputs from RTD/thermocouple transmitters; operates from isolated 3.3 V supply. Use Value: –40°C to +85°C guaranteed operation, ±1.5 µV/°C offset drift, and 80 dB PSRR ensure stable readings despite supply ripple and thermal gradients. |
Use Scenario: Long-duration environmental monitoring using coin-cell or energy-harvesting power sources. IC Role / Device Role / Timing Role: Duty-cycled ADC activated only during scheduled sampling intervals; enters 50 nA power-down state between conversions. Use Value: Power scales from 2.6 mW (400 kSPS) to 65 µW (10 kSPS), extending multi-year battery life while maintaining 16-bit resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, low-power SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8862IDRCR | 680-kSPS throughput, same 16-bit resolution and VSSOP/VSON packaging; higher speed but 3.5 mW at full rate. | Better suited for higher-bandwidth process control loops requiring >500 kHz effective sampling. | Select when system demands faster update rates and can accommodate slightly higher power and cost. |
| ADS8866IDGST | Differential input architecture (vs. single-ended); identical 400-kSPS rate, 93 dB SNR, and power profile. | Required for applications with noisy environments or fully differential sensor outputs (e.g., bridge-based strain gauges). | Choose only if true differential input is mandatory; not pin-compatible-requires layout revision. |
Compared with ADS8864IDGS, ADS8862IDRCR offers higher throughput at increased power, while ADS8866IDGST provides differential input capability at identical speed and precision-neither is pin-compatible, and both require interface and layout validation for replacement.
Availability
ADS8864IDGS is available at Aetrix Electronics and suitable for automatic test equipment, portable medical instruments, and industrial process monitors requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADS8864IDGS 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 and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.
The ADS8864IDGS belongs to TI's precision SAR ADC portfolio, engineered for high-resolution, low-power, and low-latency acquisition in space- and energy-constrained applications-from handheld diagnostics to automated test systems.
FAQ
What is the maximum sample rate supported by the ADS8864IDGS?
The ADS8864IDGS supports a maximum throughput rate of 400 kSPS with no latency and guaranteed 16-bit NMC performance. At this rate, total power dissipation is 2.6 mW (AVDD = 3 V, VREF = 5 V). The device maintains full specification compliance-including ±2.0 LSB INL and 93 dB SNR-across the full –40°C to +85°C operating temperature range. Lower throughput rates reduce power linearly (e.g., 65 µW at 10 kSPS).
Does the ADS8864IDGS support differential input signals?
No, the ADS8864IDGS is explicitly a single-ended input ADC. Its AINN pin serves only as a grounded reference return-not an active inverting input-and the device accepts unipolar signals from 0 V to VREF on AINP. For true differential input capability, TI recommends the pin-compatible ADS8865 or functionally similar ADS8866, both of which implement fully differential architectures with matched input paths and common-mode rejection.
What reference voltage range is compatible with the ADS8864IDGS?
The ADS8864IDGS accepts an external reference voltage from 2.5 V to 5 V, independent of AVDD and DVDD supply levels. This allows use of standard precision references such as the REF5025 (2.5 V), REF5040 (4.096 V), or REF5050 (5.0 V) without level-shifting circuitry. The REF pin must be decoupled with ≥10 µF capacitance to ensure stability and optimal AC performance, particularly at higher input frequencies.
Can the ADS8864IDGS interface with a 1.8-V microcontroller?
Yes-the ADS8864IDGS supports DVDD from 1.65 V to 3.6 V, making it fully compatible with 1.8-V digital hosts. Its CMOS digital I/O (DIN, DOUT, SCLK, CONVST) meets VIH/VIL thresholds at 1.8 V (VIH ≥ 1.26 V, VIL ≤ 0.54 V), and output drive strength is specified for CLOAD = 20 pF. No level-shifter is required when DVDD = 1.8 V, provided the host MCU's I/O tolerances align with ADS8864IDGS' published logic thresholds.
What package options are available for the ADS8864IDGS?
The ADS8864IDGS is offered exclusively in the 10-pin VSSOP (DGS) package, measuring 3.00 mm × 3.00 mm with standard gull-wing leads. Unlike the DRC (VSON) variant, the DGS package does not include an exposed thermal pad. Both packages share identical pinout and electrical specifications, but the DGS variant is optimized for reflow compatibility and optical inspection in high-volume manufacturing.
ADS8864IDGS 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):
- 400k
- 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:
- 1.65V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8864IDGS FAQ
1.How can I place an order for ADS8864IDGS through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8864IDGS 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 ADS8864IDGS reliable?
The price and inventory of ADS8864IDGS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8864IDGS is usually 5 days.
3.What payment methods are accepted for ADS8864IDGS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8864IDGS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8864IDGS?
ADS8864IDGS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8864IDGS 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 ADS8864IDGS?
For technical support, including ADS8864IDGS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8864IDGS requirements.
6.How does Aetrix verify that ADS8864IDGS is sourced from the original manufacturer or authorized distributors?
All ADS8864IDGS 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 ADS8864IDGS meets industry standards.
7.What is the process for return or replacement of ADS8864IDGS?
All ADS8864IDGS units undergo pre-shipment inspection (PSI). If there is an issue with ADS8864IDGS, 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 ADS8864IDGS part is unused and in its original packaging.
Return procedure for ADS8864IDGS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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