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Texas Instruments ADS8881IDRCT
- Part No.:
- ADS8881IDRCT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ADS8881IDRCT.pdf
- Description:
- IC ADC 10VSON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADS8881IDRCT from Texas Instruments is an 18-bit, 1-MSPS, true-differential SAR analog-to-digital converter with SPI-compatible serial interface, 90 dB minimum CMRR, and unipolar input range of –VREF to +VREF. It operates with independent 2.7–3.6 V AVDD/DVDD supplies and 2.5–5 V external reference, targeting precision data acquisition in low-power instrumentation.
For engineers reviewing the ADS8881IDRCT datasheet, ADS8881IDRCT pinout, ADS8881IDRCT application, or ADS8881IDRCT equivalent, key selection considerations include its 290 ns full-scale settling time, 5.5 mW power at 1 MSPS, daisy-chain capability, and VSON-10 (3 mm × 3 mm) package with exposed thermal pad for thermal management in space-constrained designs.
Technical Context
The ADS8881IDRCT implements a successive approximation register (SAR) architecture with no latency output and supports three interface modes: 3-wire (CONVST as CS), 4-wire (DIN as CS), and daisy-chain. Its true-differential analog front-end accepts AINP/AINN inputs with common-mode voltage from 0 V to VREF while maintaining ≥90 dB CMRR.
Conversion timing is deterministic: tconv ≤ 710 ns over –40°C to +85°C, tACQ = 290 ns, and step response settles to 18-bit accuracy in 290 ns. Power scales linearly with throughput-55 µW at 10 kSPS, 0.55 mW at 100 kSPS, and 5.5 mW at 1 MSPS-enabling adaptive power management in battery-operated systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with no missing codes (NMC), enabling 1:262,144 dynamic range for high-fidelity signal capture. |
| Sample Rate | 1 MSPS maximum throughput, supporting real-time sampling of signals up to 500 kHz Nyquist bandwidth. |
| INL (max) | ±3.0 LSB for ADS8881I grade, corresponding to ±0.0073% FSR error-critical for absolute accuracy in calibration-sensitive applications. |
| SNR / THD | 100 dB SNR and –115 dB THD at 1 kHz (VREF = 5 V), delivering >16.6 effective number of bits (ENOB) in precision measurement. |
| Input Range | True-differential: –VREF to +VREF; common-mode: 0 V to VREF-allows direct interfacing with differential op-amp outputs without level-shifting. |
| Power @ 1 MSPS | 5.5 mW total (AVDD + DVDD), reducing thermal load and enabling integration into thermally constrained PCB layouts. |
| Package | VSON-10 (DRC), 3.0 mm × 3.0 mm body with exposed thermal pad-optimized for compact, high-density sensor interface modules. |
Pinout & Package
VSON-10 (DRC) package with 3.0 mm × 3.0 mm footprint and exposed thermal pad connected to PCB ground for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: REF | Analog reference input | Accepts 2.5–5 V external reference; requires ≥10 µF decoupling capacitor; independent of AVDD supply rail. |
| 2: AVDD | Analog power supply | 2.7–3.6 V supply for analog core; must be decoupled to GND with 1 µF capacitor to suppress noise coupling into conversion path. |
| 3: AINP | Analog input (+) | Noninverting true-differential input; operates within –0.1 V to VREF + 0.1 V range; 59 pF input capacitance affects anti-alias filter design. |
| 4: AINN | Analog input (–) | Inverting true-differential input; same voltage range and capacitance as AINP; enables rejection of common-mode interference. |
| 5: GND | Common analog/digital ground | Single reference node for AVDD, DVDD, and REF return; internal connection to reference return-requires low-impedance PCB ground plane. |
| 6: CONVST | Digital control input | Starts conversion; functions as chip select in 3-wire mode; minimum pulse width 10 ns; timing-critical for synchronization. |
| 7: DOUT | Digital output | SPI-compatible serial data output; MSB-first; valid on SCLK falling edge; 3-state controlled by CONVST or DIN depending on interface mode. |
| 8: SCLK | Digital clock input | Up to 70 MHz clock; determines interface speed; timing parameters (tclkl, tclkh) require 45–55% duty cycle for reliable operation. |
| 9: DIN | Digital input | Serial data input; selects interface mode at conversion start; functions as chip select in 4-wire mode; setup/hold times defined per timing table. |
| 10: DVDD | Digital power supply | 2.7–3.6 V supply for digital interface; independent of AVDD; decoupled with 1 µF capacitor to minimize digital switching noise injection. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency output | Delivers conversion result immediately after completion-eliminates pipeline delay for real-time closed-loop control feedback paths. |
| Daisy-chain support | Enables cascading multiple ADS8881IDRCT devices on a single SPI bus without additional GPIO, reducing host interface complexity in multi-channel systems. |
| Full-scale settling: 290 ns | Ensures accurate sampling of fast transients and step events-critical for fault detection and dynamic signal analysis in ATE and medical diagnostics. |
| Power-down current: 50 nA | Permits ultra-low quiescent power during idle periods-extends battery life in portable instruments and wireless sensor nodes. |
| 90 dB min CMRR | Maintains accuracy in noisy industrial environments where common-mode interference (e.g., motor drives, EMI) exceeds 100 mV peak-to-peak. |
Applications
| Automatic Test Equipment (ATE) | Instrumentation and Process Controls |
|---|---|
Use Scenario: High-speed parametric testing of semiconductor devices requiring sub-LSB linearity and repeatable DC accuracy across temperature. IC Role / Device Role / Timing Role: Primary ADC capturing device under test (DUT) voltage/current waveforms at 1 MSPS with deterministic timing and no latency. Use Value: ±3.0 LSB INL max and 100 dB SNR enable pass/fail decisions at 16+ ENOB, reducing test time and false rejects in production wafer sort. |
Use Scenario: Analog sensor signal conditioning in PLC I/O modules measuring pressure, flow, and temperature with 0.01% system accuracy requirements. IC Role / Device Role / Timing Role: Precision digitizer for isolated 4–20 mA loop receivers and bridge sensor interfaces with true-differential input rejecting field-induced noise. Use Value: 90 dB CMRR and –VREF to +VREF input range allow direct connection to instrumentation amplifiers without gain/level-shift stages-reducing BOM count and layout area. |
| Precision Medical Equipment | Low-Power, Battery-Operated Instruments |
Use Scenario: ECG/EEG front-end digitization in portable diagnostic devices requiring low noise, high CMRR, and DC stability over patient movement artifacts. IC Role / Device Role / Timing Role: High-fidelity analog-to-digital conversion of amplified biopotential signals with minimal added noise and offset drift. Use Value: ±1.5 µV/°C offset drift and 55 µW power at 10 kSPS extend battery runtime while preserving diagnostic resolution for ST-segment analysis. |
Use Scenario: Handheld multimeter or environmental monitor operating from coin-cell or AA batteries with multi-year shelf life. IC Role / Device Role / Timing Role: Low-power ADC performing periodic sensor reads (e.g., temperature, humidity) with automatic power-down between conversions. Use Value: 50 nA power-down current and throughput-scaled power dissipation (55 µW @ 10 kSPS) maximize energy efficiency without sacrificing 18-bit resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8861IPWR | 16-bit, 1-MSPS, VSSOP-16 package; lower resolution but higher SNR (102 dB); no daisy-chain support. | Better noise floor for AC-coupled signals; lacks true-differential input-requires external driver for differential sources. | Select when 16-bit resolution suffices and board space allows larger VSSOP-16; avoid if true-differential interface or daisy-chain is required. |
| AD7606C-18BSTZ | 18-bit, 1-MSPS, simultaneous sampling octal ADC; parallel + SPI interface; 5 V supply only; larger LQFP-64 package. | Multi-channel synchronized acquisition; higher power (120 mW); not suitable for space-constrained single-channel designs. | Choose for 8-channel simultaneous sampling in data loggers; ADS8881IDRCT preferred for compact, low-power, single-channel precision systems. |
Compared with ADS8881IDRCT, ADS8861IPWR trades resolution for marginally better AC performance and simpler interface, while AD7606C-18BSTZ provides channel count and simultaneity at the cost of size, power, and supply inflexibility-making ADS8881IDRCT optimal for miniaturized, battery-aware, true-differential single-channel applications.
Availability
ADS8881IDRCT is available at Aetrix Electronics and suitable for automatic test equipment, precision instrumentation, and portable medical devices requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADS8881IDRCT 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 ADS8881IDRCT belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power, and true-differential signal acquisition in demanding measurement applications-from factory automation to point-of-care diagnostics.
FAQ
What is the operating temperature range for the ADS8881IDRCT?
The ADS8881IDRCT is rated for industrial operation from –40°C to +85°C (I-grade). This range is validated across all electrical specifications including INL, SNR, and CMRR, ensuring consistent 18-bit performance in harsh environments such as factory floors or outdoor instrumentation enclosures. The ADS8881IDRCT maintains full functionality without derating across this span.
Does the ADS8881IDRCT support daisy-chain configuration?
Yes, the ADS8881IDRCT supports daisy-chain operation via its SPI-compatible serial interface. In daisy-chain mode, multiple ADS8881IDRCT devices share one SCLK and CONVST line, with DOUT of one device connected to DIN of the next. This eliminates the need for individual chip-select lines and simplifies firmware for multi-channel systems-confirmed in TI's SBAS547D datasheet Section 8.8.
What reference voltage range is compatible with the ADS8881IDRCT?
The ADS8881IDRCT accepts an external reference voltage from 2.5 V to 5 V on the REF pin, independent of AVDD. This wide range allows flexible signal scaling-for example, using a 2.5 V reference for ±1.25 V differential input or 5 V for ±2.5 V full-scale swing-without requiring additional level-shifting circuitry. The ADS8881IDRCT specifies 300 µA typical reference input current at 1 MSPS.
How does power consumption scale with sample rate in the ADS8881IDRCT?
ADS8881IDRCT power scales linearly with throughput: 55 µW at 10 kSPS, 0.55 mW at 100 kSPS, and 5.5 mW at 1 MSPS (AVDD = DVDD = 3 V). This behavior stems from its SAR architecture's clock-gated logic-enabling dynamic power optimization in burst-mode sensing applications. The ADS8881IDRCT achieves 50 nA power-down current when idle, further extending battery life.
What package type is used for the ADS8881IDRCT?
The ADS8881IDRCT uses the VSON-10 (DRC) package: a 3.0 mm × 3.0 mm, 10-pin very thin small-outline no-lead package with an exposed thermal pad. This package is optimized for compact PCB layouts and improved thermal dissipation-TI recommends soldering the thermal pad directly to the PCB ground plane. The ADS8881IDRCT's pinout matches the functional definition in SBAS547D Figure 7 (DRC top view).
ADS8881IDRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- 10-VSON (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8881IDRCT FAQ
1.How can I place an order for ADS8881IDRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8881IDRCT 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 ADS8881IDRCT reliable?
The price and inventory of ADS8881IDRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8881IDRCT is usually 5 days.
3.What payment methods are accepted for ADS8881IDRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8881IDRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8881IDRCT?
ADS8881IDRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8881IDRCT 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 ADS8881IDRCT?
For technical support, including ADS8881IDRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8881IDRCT requirements.
6.How does Aetrix verify that ADS8881IDRCT is sourced from the original manufacturer or authorized distributors?
All ADS8881IDRCT 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 ADS8881IDRCT meets industry standards.
7.What is the process for return or replacement of ADS8881IDRCT?
All ADS8881IDRCT units undergo pre-shipment inspection (PSI). If there is an issue with ADS8881IDRCT, 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 ADS8881IDRCT part is unused and in its original packaging.
Return procedure for ADS8881IDRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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