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Texas Instruments ADC081S101CISD/NOPB
- Part No.:
- ADC081S101CISD/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
ADC081S101CISD/NOPB.pdf
- Description:
- IC ADC 8BIT SAR 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:338
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Product details
Overview
ADC081S101CISD/NOPB from Texas Instruments is a single-channel, 8-bit successive-approximation ADC with SPI/QSPI/MICROWIRE-compatible serial interface, operating at 0.5–1 Msps sample rates on a single 2.7V–5.25V supply. It features ±0.05 LSB typical INL, 49.7 dB SNR, and 2.0 mW power consumption at 3V - deployed in portable instrumentation for low-power analog signal digitization.
For engineers reviewing the ADC081S101CISD/NOPB datasheet, ADC081S101CISD/NOPB pinout, ADC081S101CISD/NOPB application, or ADC081S101CISD/NOPB equivalent, key selection criteria include guaranteed performance across 500 ksps–1 Msps (not just at one rate), tri-state SDATA output timing control, track-and-hold acquisition window compliance (≥350 ns), and WSON-6 package thermal resistance of 94°C/W.
Technical Context
The ADC081S101CISD/NOPB uses a charge-redistribution DAC core with internal track-and-hold, initiating conversion on CS falling edge and sampling at aperture delay tAD = 3 ns. Its straight-binary output delivers 3 leading zeros + 8 data bits + 4 trailing zeros over 16 SCLK falling edges.
It supports variable power management via CS-controlled shutdown mode (2.5 µW at 5V), operates across −40°C to +85°C, and maintains full AC/DC specifications over its entire 2.7V–5.25V supply range - unlike legacy 8-bit converters specified only at nominal VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes with no missing codes guaranteed. |
| Sample Rate Range | 500 ksps to 1 Msps - fully specified performance across this full range, not extrapolated. |
| INL (typ) | ±0.05 LSB - ensures monotonicity and <0.02% full-scale linearity error in closed-loop sensor systems. |
| SNR (typ) | 49.7 dB - corresponds to ~7.9 effective bits (ENOB) for 100 kHz input signals. |
| Power (3V) | 2.0 mW (typ) - enables battery operation in portable data loggers with >100-hour runtime at 500 ksps. |
| Shutdown Power | 2.5 µW (at 5V) - reduces average power by >99% during idle intervals in duty-cycled sensing. |
| Aperture Jitter | 30 ps (typ) - limits noise floor degradation in medium-frequency AC measurement applications. |
Pinout & Package
The ADC081S101CISD/NOPB is housed in a 6-pin WSON package (3.0 mm × 3.0 mm, 0.65 mm pitch) with exposed thermal pad (recommended grounded). Pin 1 is VA; pin 2 is GND; pin 3 is VIN; pin 4 is SCLK; pin 5 is SDATA; pin 6 is CS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VA (Pin 1) | Analog supply input | Reference and power source for ADC core; must be bypassed with 1 µF + 0.1 µF capacitors within 1 cm. |
| GND (Pin 2) | Analog/digital ground return | Common reference for analog input, digital interface, and internal logic; center pad must be connected to GND. |
| VIN (Pin 3) | Analog input | 0 V to VA range; input capacitance = 30 pF (track) / 4 pF (hold); requires low-impedance drive for AC accuracy. |
| SCLK (Pin 4) | Serial clock input | Controls conversion timing and data readout; accepts 25 kHz–20 MHz clocks; duty cycle 40–60% required. |
| SDATA (Pin 5) | Digital data output | Tri-state CMOS output; drives 15 pF load; outputs 3+8+4 bit frame on SCLK falling edges. |
| CS (Pin 6) | Chip select | Falling edge initiates conversion; high state forces shutdown mode; rising edge terminates data transfer. |
Key Features
| Feature | Design Value |
|---|---|
| Full-rate specification | Guaranteed DNL (±0.07 LSB), INL (±0.05 LSB), and SNR (49.7 dB) across 500 ksps–1 Msps - eliminates derating uncertainty. |
| Flexible supply range | 2.7V–5.25V operation enables direct interfacing with Li-ion batteries (3.0–4.2V) or 3.3V/5V system rails without LDOs. |
| Multi-standard serial interface | SPI/QSPI/MICROWIRE/DSP compatibility allows drop-in replacement in existing microcontroller firmware without protocol changes. |
| Low-noise track-and-hold | 30 pF input capacitance in track mode and 4 pF in hold mode minimize settling error and enable <100 ns acquisition time. |
| Thermal-enhanced WSON | 94°C/W θJA enables continuous 1 Msps operation at +85°C ambient without external heatsinking. |
Applications
| Portable Medical Sensors | Industrial Process Monitoring |
|---|---|
|
Use Scenario: Battery-powered wearable ECG front-end digitizing 1–100 Hz biopotential signals at 1 ksps. IC Role / Device Role / Timing Role: Primary analog-to-digital converter acquiring conditioned electrode signals with 8-bit resolution and minimal power overhead. Use Value: 2.0 mW at 3V extends coin-cell life beyond 12 months; ±0.05 LSB INL ensures accurate amplitude tracking of ST-segment deviations. |
Use Scenario: PLC analog input module measuring 4–20 mA current loop outputs from pressure/temperature transmitters. IC Role / Device Role / Timing Role: Isolated channel ADC converting loop-derived voltage across precision shunt resistor. Use Value: 500 ksps minimum sample rate supports oversampling for 16-bit effective resolution; shutdown mode cuts standby power to µW level. |
| Remote Environmental Data Loggers | Embedded Test Equipment |
|
Use Scenario: Solar-powered soil moisture sensor node sampling resistive/capacitive probes every 5 seconds. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during measurement bursts to minimize energy per sample. Use Value: 2.5 µW shutdown power enables multi-year deployment; SPI interface simplifies integration with low-cost ARM Cortex-M0 MCUs. |
Use Scenario: Handheld multimeter digitizing AC/DC voltage, current, and resistance readings with auto-ranging. IC Role / Device Role / Timing Role: High-speed auxiliary ADC supporting fast sampling for crest factor analysis and harmonic distortion measurement. Use Value: 49.7 dB SNR and 68 dB SFDR meet IEC 61000-4-30 Class A requirements for power quality analyzers up to 100 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC081S051CISD/NOPB | Specified for 200–500 ksps range; lower max sample rate; identical pinout and interface. | Better suited for cost-sensitive industrial controls where 500 ksps suffices and 1 Msps headroom is unnecessary. | Select when system throughput requirement is ≤500 ksps and BOM cost reduction is prioritized over speed margin. |
| ADC081S021CISD/NOPB | Specified for 50–200 ksps range; higher power efficiency at low rates; same package and pinout. | Ideal for ultra-low-power IoT endpoints sampling temperature/humidity at sub-100 Hz with extended sleep cycles. | Choose when average sample rate is <200 ksps and shutdown current (100 nA typ) is more critical than speed. |
Compared with ADC081S051CISD/NOPB and ADC081S021CISD/NOPB, the ADC081S101CISD/NOPB provides verified 1 Msps capability with identical layout compatibility - enabling scalable design reuse across product tiers while maintaining worst-case timing margins for real-time control loops.
Availability
ADC081S101CISD/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, industrial process monitoring, remote environmental data loggers, and embedded test equipment requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.
Supply support for ADC081S101CISD/NOPB 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and energy efficiency.
The ADC081S101CISD/NOPB belongs to TI's precision SAR ADC family designed specifically for space-constrained, low-power industrial and portable instrumentation - balancing speed, accuracy, and quiescent power without sacrificing robustness.
FAQ
What is the maximum guaranteed sample rate for ADC081S101CISD/NOPB with full AC specifications?
The ADC081S101CISD/NOPB is fully specified and guaranteed at 1 Msps across all key AC parameters including SNR (49.7 dB), THD (−77 dB), and SFDR (68 dB) under standard test conditions (fIN = 100 kHz, VA = 2.7–5.25 V). This is confirmed in Table 1 and Section 6.5 of the SNAS310D datasheet, distinguishing it from derivatives rated only up to 500 ksps.
Does ADC081S101CISD/NOPB require an external reference voltage?
No - the ADC081S101CISD/NOPB uses its VA supply pin as the reference, eliminating need for external references. Its transfer function scales linearly from 0 V to VA, with LSB = VA/256. This simplifies design but requires clean, low-noise VA regulation - TI recommends local 1 µF + 0.1 µF bypassing per Figure 21.
Can ADC081S101CISD/NOPB interface directly with 1.8V logic microcontrollers?
Yes - digital inputs (CS, SCLK) tolerate voltages up to +5.25 V regardless of VA, enabling safe interfacing with 1.8V, 3.3V, or 5V controllers. However, SDATA output swing is rail-to-rail (0 V to VA), so a level shifter is required if VA > 1.8V and the MCU input threshold is strict.
What is the acquisition time requirement before the next CS pulse for ADC081S101CISD/NOPB?
The ADC081S101CISD/NOPB requires ≥350 ns quiet time (tACQ) between the 13th rising edge of SCLK and the next CS falling edge to ensure full accuracy. This is explicitly defined in Section 8.5.1 and Figure 3 of the datasheet - violating this interval degrades DNL and INL performance.
Is the WSON package of ADC081S101CISD/NOPB lead-free and RoHS compliant?
Yes - the "/NOPB" suffix in ADC081S101CISD/NOPB denotes lead-free (Pb-free) and RoHS-compliant construction. The WSON package meets JEDEC J-STD-020 reflow profiles for lead-free soldering, with peak temperature tolerance up to 260°C per TI's SNOA549 specification.
ADC081S101CISD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 6-WSON (2.2x2.5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC081S101CISD/NOPB FAQ
1.How can I place an order for ADC081S101CISD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC081S101CISD/NOPB 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 ADC081S101CISD/NOPB reliable?
The price and inventory of ADC081S101CISD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC081S101CISD/NOPB is usually 5 days.
3.What payment methods are accepted for ADC081S101CISD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC081S101CISD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC081S101CISD/NOPB?
ADC081S101CISD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC081S101CISD/NOPB 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 ADC081S101CISD/NOPB?
For technical support, including ADC081S101CISD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC081S101CISD/NOPB requirements.
6.How does Aetrix verify that ADC081S101CISD/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC081S101CISD/NOPB 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 ADC081S101CISD/NOPB meets industry standards.
7.What is the process for return or replacement of ADC081S101CISD/NOPB?
All ADC081S101CISD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC081S101CISD/NOPB, 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 ADC081S101CISD/NOPB part is unused and in its original packaging.
Return procedure for ADC081S101CISD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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