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Texas Instruments ADS8881CDRCT
- Part No.:
- ADS8881CDRCT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ADS8881CDRCT.pdf
- Description:
- IC ADC 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,901
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Product details
Overview
ADS8881CDRCT from Texas Instruments is an 18-bit, 1-MSPS, true-differential SAR analog-to-digital converter with SPI-compatible serial interface, ±VREF input range, 90 dB min CMRR, and 100 dB SNR at 1 kHz - used in precision instrumentation and low-power medical data acquisition systems.
For engineers reviewing the ADS8881CDRCT datasheet, ADS8881CDRCT pinout, ADS8881CDRCT application, or ADS8881CDRCT equivalent, this page delivers verified electrical specs, thermal performance, daisy-chain timing, power-scaling behavior, and validated alternative options for high-accuracy, low-noise signal digitization in battery-operated and industrial test equipment.
Technical Context
The ADS8881CDRCT implements a successive approximation register (SAR) architecture with no latency output and full-scale step settling to 18 bits in 290 ns. Its true-differential input accepts –VREF to +VREF differential swing while supporting 0 V to VREF common-mode voltage with ≥90 dB CMRR.
It features three interface modes - 3-wire (CONVST as CS), 4-wire (DIN as CS), and daisy-chain - all SPI-compatible and supporting busy-indicator bit. Power dissipation scales linearly with throughput: 5.5 mW at 1 MSPS, 55 µW at 10 kSPS, with 50 nA AVDD power-down current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with no missing codes - guarantees monotonicity and full code coverage across full temperature range. |
| Sample Rate | 1 MSPS maximum - enables real-time capture of signals up to ~30 MHz small-signal bandwidth (BW–3dB = 30 MHz). |
| INL (max) | ±2.0 LSB - ensures <±0.0076% full-scale error for calibration-critical applications like ATE and medical diagnostics. |
| SNR / THD | 100 dB / –115 dB at 1 kHz - supports >16.6 effective number of bits (ENOB) for high-fidelity waveform reconstruction. |
| Supply Range | AVDD: 2.7–3.6 V; DVDD: 2.7–3.6 V (independent); REF: 2.5–5 V - allows flexible reference selection without scaling amplifiers. |
| Operating Temp | 0°C to +70°C (C-grade) - qualified for commercial and industrial environments with stable parametric drift (±1.5 µV/°C offset). |
| Package | VSON-10 (DRC), 3.0 mm × 3.0 mm - exposes thermal pad for PCB ground connection to maintain junction temperature under 111.1°C/W RθJA. |
Pinout & Package
VSON-10 (DRC) package with exposed thermal pad; requires solder connection to PCB ground for thermal management and noise reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: REF | Analog reference input | Accepts 2.5–5 V external reference; decoupled with ≥10 µF capacitor; independent of AVDD voltage rail. |
| 2: AVDD | Analog power supply | 2.7–3.6 V analog supply; must be decoupled to GND with 1 µF capacitor; powers internal SAR core and analog front-end. |
| 3: AINP | Analog input (+) | Non-inverting true-differential input; operates within –0.1 V to VREF + 0.1 V; 59 pF input capacitance. |
| 4: AINN | Analog input (–) | Inverting true-differential input; same voltage range and capacitance as AINP; enables rejection of common-mode interference. |
| 5: GND | Analog/digital common ground | Shared return for AVDD, DVDD, and REF; internal reference return path; critical for PSRR (80 dB) and CMRR (90 dB min). |
| 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 after SCLK falling edge (td-CK-DO ≤ 13.4 ns); 3-state controlled by CONVST/DIN. |
| 8: SCLK | Digital clock input | Up to 70 MHz clock; defines interface timing; supports 3-wire, 4-wire, and daisy-chain modes; duty cycle 45–55%. |
| 9: DIN | Digital input | Serial data input; selects interface mode at conversion start; functions as CS in 4-wire mode; setup/hold times defined per timing table. |
| 10: DVDD | Digital power supply | 2.7–3.6 V digital I/O supply; independent of AVDD; decoupled with 1 µF capacitor; powers SPI logic and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency output | Delivers first valid conversion result immediately after tconv (≤710 ns), eliminating pipeline delay for real-time control loops. |
| True-differential input | Supports –VREF to +VREF differential swing with 0 V to VREF common-mode range - enables direct interfacing with differential sensors and op-amp outputs. |
| Power scaling with throughput | Dissipates only 55 µW at 10 kSPS - extends battery life in portable instruments without sacrificing resolution or linearity. |
| Daisy-chain capability | Allows cascading multiple ADS8881 devices on single SPI bus using shared SCLK/CONVST - reduces GPIO count and simplifies multi-channel synchronization. |
| High CMRR & PSRR | ≥90 dB common-mode rejection and 80 dB power-supply rejection - maintains accuracy in noisy industrial or mixed-signal PCB environments. |
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 digitizer capturing voltage/current waveforms at 1 MSPS with no latency and 18-bit fidelity. Use Value: Enables pass/fail decisions based on ±2 LSB INL and 100 dB SNR - reducing false rejects in production test. |
Use Scenario: Analog sensor monitoring in PLC modules where long-term stability and noise immunity are critical. IC Role / Device Role / Timing Role: Precision ADC front-end for strain gauges, RTDs, and bridge sensors with true-differential input and 90 dB CMRR. Use Value: Maintains <±0.01% measurement accuracy over 0–70°C without recalibration due to low offset drift (±1.5 µV/°C). |
| Precision Medical Equipment | Low-Power, Battery-Operated Instruments |
Use Scenario: ECG/EEG signal acquisition in portable diagnostic devices demanding ultra-low noise and high dynamic range. IC Role / Device Role / Timing Role: Digitizing biopotential signals with 100 dB SNR and –115 dB THD to preserve subtle waveform morphology. Use Value: Supports >16.6 ENOB for clinical-grade interpretation - meeting IEC 60601-2-51 requirements for diagnostic accuracy. |
Use Scenario: Handheld multimeters and field calibrators operating on coin-cell batteries for extended deployment. IC Role / Device Role / Timing Role: Low-power ADC core that draws only 55 µW at 10 kSPS while retaining 18-bit resolution and NMC performance. Use Value: Extends operational lifetime beyond 1 year on CR2032 without compromising measurement integrity or startup time. |
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 |
|---|---|---|---|
| ADS8861IDRCT | 16-bit, 1-MSPS, same VSON-10 package; lower resolution but improved THD (–120 dB) and lower power (3.8 mW @ 1 MSPS). | Better suited for cost-sensitive applications where 16-bit resolution suffices and ultra-low distortion is prioritized over dynamic range. | Select when system ENOB requirement is ≤15.5 bits and THD dominates SNR in signal chain budget. |
| ADS8885IPWRT | 18-bit, 500 kSPS, TSSOP-16 package; wider AVDD/DVDD range (2.7–5.5 V); higher CMRR (95 dB); no daisy-chain support. | Preferred for space-constrained designs needing higher supply flexibility and superior noise rejection, but not requiring >500 kSPS throughput. | Choose when board layout allows larger TSSOP-16 and sampling rate can be halved to gain 5 dB CMRR margin and broader supply tolerance. |
Compared with ADS8881CDRCT, ADS8861IDRCT trades 2 bits of resolution for lower power and better harmonic suppression, while ADS8885IPWRT sacrifices speed and daisy-chain for enhanced noise immunity and supply robustness - making each suitable for distinct subsystem trade-offs in precision data acquisition.
Availability
ADS8881CDRCT 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 ADS8881CDRCT 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, power management, and signal chain solutions.
The ADS8881CDRCT belongs to TI's precision SAR ADC product line, designed specifically for high-resolution, low-power, true-differential digitization in portable and industrial measurement systems where accuracy, noise immunity, and energy efficiency are co-optimized.
FAQ
What is the maximum sample rate and corresponding power consumption of the ADS8881CDRCT?
The ADS8881CDRCT achieves a maximum sample rate of 1 MSPS with 5.5 mW total power dissipation (AVDD + DVDD) at 3 V supplies. At reduced rates - 100 kSPS and 10 kSPS - power drops to 0.55 mW and 55 µW respectively, enabling adaptive power management in battery-powered systems without resolution loss.
Does the ADS8881CDRCT support daisy-chain configuration, and what are the timing constraints?
Yes, the ADS8881CDRCT supports daisy-chain operation for cascading multiple devices on one SPI bus. Key timing constraints include tsu-CK-CNV ≥5 ns (SCLK setup before CONVST rising edge) and th-CK-CNV ≥5 ns (SCLK hold after CONVST rising edge), ensuring reliable multi-device synchronization at up to 1 MSPS.
What is the input voltage range and common-mode capability of the ADS8881CDRCT?
The ADS8881CDRCT accepts a true-differential input range of –VREF to +VREF with a common-mode voltage range of 0 V to VREF. Both inputs (AINP and AINN) must remain within –0.1 V to VREF + 0.1 V for specified performance, enabling direct connection to fully differential amplifiers and sensor bridges without level-shifting circuitry.
How does the ADS8881CDRCT handle power-down, and what is its quiescent current?
The ADS8881CDRCT automatically enters power-down between conversions, drawing only 50 nA from AVDD in deep sleep. This ultra-low quiescent current minimizes standby power in intermittent-sampling applications such as wireless sensor nodes and portable meters, while maintaining fast wake-up (<290 ns acquisition time) for next conversion.
Is the ADS8881CDRCT pin-compatible with other devices in the ADS888x family?
No - the ADS8881CDRCT (VSON-10, DRC) is not pin-compatible with ADS8885 (TSSOP-16) or ADS8887 (VSSOP-10, DGS). While functionally similar, package footprint, pin count, and pin assignments differ across the ADS888x series; PCB layout must be tailored to the specific variant's mechanical and thermal requirements.
ADS8881CDRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- 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:
- -
ADS8881CDRCT FAQ
1.How can I place an order for ADS8881CDRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8881CDRCT 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 ADS8881CDRCT reliable?
The price and inventory of ADS8881CDRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8881CDRCT is usually 5 days.
3.What payment methods are accepted for ADS8881CDRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8881CDRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8881CDRCT?
ADS8881CDRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8881CDRCT 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 ADS8881CDRCT?
For technical support, including ADS8881CDRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8881CDRCT requirements.
6.How does Aetrix verify that ADS8881CDRCT is sourced from the original manufacturer or authorized distributors?
All ADS8881CDRCT 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 ADS8881CDRCT meets industry standards.
7.What is the process for return or replacement of ADS8881CDRCT?
All ADS8881CDRCT units undergo pre-shipment inspection (PSI). If there is an issue with ADS8881CDRCT, 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 ADS8881CDRCT part is unused and in its original packaging.
Return procedure for ADS8881CDRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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