My Inquiry
My Account
Texas Instruments ADS8881CDGSR
- Part No.:
- ADS8881CDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS8881CDGSR.pdf
- Description:
- IC ADC 18BIT SAR 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,539
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS8881CDGSR from Texas Instruments is an 18-bit, 1-MSPS, true-differential SAR analog-to-digital converter with no latency output, ±1 LSB typical INL, 100 dB SNR, and SPI-compatible serial interface supporting daisy-chain operation. It operates with a 2.5 V to 5 V external reference independent of AVDD/DVDD and targets precision data acquisition in battery-powered instrumentation.
For engineers reviewing the ADS8881CDGSR datasheet, ADS8881CDGSR pinout, ADS8881CDGSR application, or ADS8881CDGSR equivalent, key selection considerations include true-differential input range (–VREF to +VREF), 90 dB min CMRR at 0 V to VREF common-mode, 5.5 mW power at 1 MSPS, MSOP-10 package, and compatibility with low-power, high-accuracy signal chain designs requiring unipolar differential inputs.
Technical Context
The ADS8881CDGSR implements a successive approximation register (SAR) architecture with fully differential analog front-end, enabling precise digitization of small-signal differential inputs without gain/offset scaling. Its conversion timing is deterministic: 500 ns minimum conversion time, 290 ns acquisition time, and full-scale step settling to 18 bits in 290 ns.
It supports three interface modes-3-wire (CONVST as CS), 4-wire (DIN as CS), and daisy-chain-with SCLK up to 70 MHz and includes an optional busy-indicator bit for host synchronization. The device enters automatic power-down between conversions, drawing only 50 nA AVDD current in sleep state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with no missing codes (NMC) - guarantees monotonicity and full code coverage across full dynamic range. |
| Sample Rate | 1 MSPS maximum throughput - enables real-time capture of signals up to ~300 kHz Nyquist bandwidth. |
| INL (max) | ±2.0 LSB for ADS8881C grade - limits end-point nonlinearity error to < ±0.0076% FSR at 5 V reference. |
| SNR / THD | 100 dB SNR, –115 dB THD at 1 kHz - supports >16.6 effective number of bits (ENOB) in clean signal environments. |
| Input Range | True-differential: –VREF to +VREF - accepts bipolar differential swing while maintaining 0 V to VREF common-mode flexibility. |
| Power Dissipation | 5.5 mW at 1 MSPS, 55 µW at 10 kSPS - scales linearly with throughput, enabling ultra-low-power operation in duty-cycled systems. |
| CMRR | 90 dB minimum (0 V to VREF common-mode) - rejects noise coupled equally onto AINP and AINN terminals. |
| Reference Range | 2.5 V to 5 V, independent of AVDD/DVDD - decouples precision reference design from analog/digital supply constraints. |
Pinout & Package
ADS8881CDGSR is housed in a 10-pin MSOP (DGS) package measuring 3.0 mm × 3.0 mm with exposed thermal pad. Pin functions are validated per TI SBAS547D Rev D datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP (Pin 3) | Analog input (+) | Noninverting true-differential analog input; operates within –0.1 V to VREF + 0.1 V range. |
| AINN (Pin 4) | Analog input (–) | Inverting true-differential analog input; same voltage range as AINP; defines differential span AINP – AINN. |
| REF (Pin 1) | Analog reference input | Accepts 2.5 V–5 V external reference; requires ≥10 µF decoupling; sets full-scale differential range to ±VREF. |
| AVDD (Pin 2) | Analog supply | 2.7 V–3.6 V analog power; must be decoupled to GND with 1 µF capacitor; independent of DVDD and REF. |
| GND (Pin 5) | Common ground | Shared return for AVDD, DVDD, and internal reference; connects internally to REF return path. |
| CONVST (Pin 6) | Digital control input | Starts conversion; doubles as chip select (CS) in 3-wire mode; minimum pulse width 10 ns. |
| DOUT (Pin 7) | Digital output | SPI-compatible serial data output; MSB-first; valid after falling edge of SCLK; 3-state when CS inactive. |
| SCLK (Pin 8) | Digital clock input | Serial interface clock; supports up to 70 MHz; controls timing of DOUT sampling and DIN latching. |
| DIN (Pin 9) | Digital input | Serial data input; selects interface mode (CS vs daisy-chain) at conversion start; serves as CS in 4-wire mode. |
| DVDD (Pin 10) | Digital supply | 2.7 V–3.6 V (SCLK > 40 MHz) or 1.65 V–3.6 V (SCLK < 40 MHz); powers digital I/O; decoupled with 1 µF capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency output | Delivers final conversion result immediately upon completion-no pipeline delay-enabling deterministic real-time control loops. |
| True-differential input architecture | Rejects even-order harmonics and common-mode noise intrinsically; supports flexible VCM placement from 0 V to VREF. |
| SPI-compatible daisy-chain support | Enables synchronous multi-channel sampling with single SCLK/CONVST control-reduces host GPIO count and timing complexity. |
| Dynamic power scaling | Power drops linearly with sample rate: 5.5 mW @ 1 MSPS → 55 µW @ 10 kSPS-ideal for wake-on-event or burst-acquisition systems. |
| High CMRR at full common-mode range | 90 dB minimum rejection across entire 0 V to VREF VCM range-ensures accuracy in noisy industrial or medical sensor interfaces. |
| Low aperture jitter (5 ps RMS) | Preserves SNR at high input frequencies; contributes to 100 dB measured SNR at 1 kHz with 5 V reference. |
Applications
| Automatic Test Equipment (ATE) | Instrumentation and Process Controls |
|---|---|
Use Scenario: High-precision DC parametric testing of semiconductor devices using force-and-measure topology. IC Role / Device Role / Timing Role: ADC digitizes differential sense voltage across DUT with sub-LSB linearity and zero-latency output for closed-loop bias correction. Use Value: ±2 LSB INL max and 100 dB SNR ensure measurement repeatability within 0.0076% FSR, critical for production binning accuracy. |
Use Scenario: Analog input module in programmable logic controller (PLC) acquiring 4–20 mA loop signals via precision shunt resistor. IC Role / Device Role / Timing Role: Digitizes true-differential voltage across shunt with configurable VCM to reject common-mode noise from long field wiring. Use Value: 90 dB CMRR over 0 V–VREF VCM range suppresses induced 50/60 Hz interference without external instrumentation amplifiers. |
| Precision Medical Equipment | Low-Power, Battery-Operated Instruments |
Use Scenario: ECG front-end amplifier output digitization in portable patient monitors requiring high-resolution biopotential capture. IC Role / Device Role / Timing Role: Converts differential electrode signals with low input capacitance (59 pF) to minimize filter interaction and preserve signal integrity. Use Value: 59 pF input capacitance and 290 ns acquisition time enable stable settling with high-impedance sources, reducing need for buffer op-amps. |
Use Scenario: Data logger in wireless environmental sensor node sampling thermistor or strain gauge bridges intermittently. IC Role / Device Role / Timing Role: Provides 18-bit resolution during active acquisition, then auto-enters 50 nA power-down state between samples to extend battery life. Use Value: 50 nA AVDD shutdown current and throughput-proportional power dissipation (55 µW @ 10 kSPS) maximize energy efficiency per useful sample. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8861IDRCT | 16-bit, 1-MSPS, true-differential SAR ADC; lower resolution; 85 dB SNR; 2.7–3.6 V supplies only. | Targeted at cost-sensitive industrial sensing where 16-bit resolution suffices; lacks extended reference voltage range (2.5–5 V). | Select ADS8861IDRCT when system SNR requirements are ≤85 dB and reference is fixed at 2.5 V or 3.3 V. |
| AD7606C-18BSTZ | 18-bit, 1-MSPS, simultaneous-sampling 8-channel SAR ADC; parallel/serial interface; ±10 V bipolar input option; higher power (44 mW). | Designed for multi-channel synchronized acquisition (e.g., motor phase currents); requires external reference and more PCB area. | Choose AD7606C-18BSTZ when simultaneous sampling across ≥2 channels is mandatory and board space/power budget allow. |
Compared with ADS8881CDGSR, ADS8861IDRCT trades 2 bits of resolution and 15 dB SNR for lower cost and simpler supply scheme, while AD7606C-18BSTZ adds channel count and simultaneity at the expense of single-channel power efficiency, interface flexibility, and compact 3×3 mm footprint.
Availability
ADS8881CDGSR is available at Aetrix Electronics and suitable for automatic test equipment, precision instrumentation, medical diagnostics, and portable data loggers requiring stable component supply, long-term manufacturability, and guaranteed traceable sourcing.
Supply support for ADS8881CDGSR 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 high-performance signal chain solutions with broad industrial, automotive, and medical design expertise.
The ADS8881CDGSR belongs to TI's precision SAR ADC portfolio, engineered for ultra-low-power, high-resolution data acquisition in space- and energy-constrained applications where true-differential input fidelity and deterministic latency are critical.
FAQ
What is the operating temperature range for the ADS8881CDGSR?
The ADS8881CDGSR is rated for commercial temperature operation from 0°C to +70°C. This grade is distinct from the ADS8881I variant, which extends to –40°C to +85°C. The 'C' suffix in ADS8881CDGSR explicitly denotes the 0°C to +70°C specification, verified in TI SBAS547D Section 8.3 and Table 1.
Does the ADS8881CDGSR support both 3-wire and 4-wire SPI interfaces?
Yes, the ADS8881CDGSR supports three interface configurations: 3-wire (CONVST as chip select), 4-wire (DIN as chip select), and daisy-chain. All modes use standard SPI timing with MSB-first, SCLK up to 70 MHz, and optional busy-bit synchronization-detailed in Sections 8.6–8.8 of the ADS8881CDGSR datasheet.
What is the minimum required decoupling for the REF pin on the ADS8881CDGSR?
The ADS8881CDGSR REF pin requires a minimum 10 µF capacitor, with TI recommending ≥22 µF for optimal performance. This bulk capacitance stabilizes the reference during conversion current transients and is specified in Electrical Characteristics Table 8.5 under "CREF Decoupling capacitor at the REF input".
Can the ADS8881CDGSR operate with a 2.5 V reference voltage?
Yes, the ADS8881CDGSR supports reference voltages from 2.5 V to 5 V. The 'C' grade (ADS8881CDGSR) specifies 3 V to 5 V in Recommended Operating Conditions, but Electrical Characteristics Table 8.5 explicitly lists 2.5 V as a valid minimum for the ADS8881I grade-and Figure 10/11 confirm INL/DNL performance remains stable down to 2.5 V for both grades.
Is the ADS8881CDGSR pin-compatible with other devices in the ADS8881x family?
Yes, all ADS8881x variants-including ADS8881CDGSR, ADS8881IDGSR, ADS8881CDRCR, and ADS8881IDRCR-share identical pinouts across both MSOP-10 (DGSR) and VSON-10 (DRCR) packages. Pin configuration diagrams in Section 7 of SBAS547D confirm functional and physical equivalence across temperature grades and packages.
ADS8881CDGSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 1M
- 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:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 10-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8881CDGSR FAQ
1.How can I place an order for ADS8881CDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8881CDGSR 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 ADS8881CDGSR reliable?
The price and inventory of ADS8881CDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8881CDGSR is usually 5 days.
3.What payment methods are accepted for ADS8881CDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8881CDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8881CDGSR?
ADS8881CDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8881CDGSR 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 ADS8881CDGSR?
For technical support, including ADS8881CDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8881CDGSR requirements.
6.How does Aetrix verify that ADS8881CDGSR is sourced from the original manufacturer or authorized distributors?
All ADS8881CDGSR 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 ADS8881CDGSR meets industry standards.
7.What is the process for return or replacement of ADS8881CDGSR?
All ADS8881CDGSR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8881CDGSR, 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 ADS8881CDGSR part is unused and in its original packaging.
Return procedure for ADS8881CDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS8881CDGSR Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
