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Texas Instruments ADC101S021CISDX/NOPB
- Part No.:
- ADC101S021CISDX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
ADC101S021CISDX/NOPB.pdf
- Description:
- IC ADC 10BIT SAR 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,163
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Product details
Overview
ADC101S021CISDX/NOPB from Texas Instruments is a single-channel, 10-bit successive-approximation ADC with SPI/QSPI/MICROWIRE/DSP-compatible serial interface, operating at 50–200 ksps sample rates over −40°C to +85°C. It features 61.6 dB typical SNR, ±0.14/−0.13 LSB INL, and 2.34 mW power consumption at 3.6 V - used for precision analog sensing in portable instrumentation and remote data acquisition.
For engineers reviewing the ADC101S021CISDX/NOPB datasheet, ADC101S021CISDX/NOPB pinout, ADC101S021CISDX/NOPB application, or ADC101S021CISDX/NOPB equivalent, this page delivers verified electrical specs, industrial-grade timing behavior, WSON-6 package mapping, real-world signal-chain integration guidance, and validated alternative options for low-power 10-bit SAR ADC selection.
Technical Context
The ADC101S021CISDX/NOPB implements a charge-redistribution DAC core with internal track-and-hold, enabling accurate sampling across its full 50–200 ksps range without performance degradation. Its straight-binary output format and SPI-compatible 3-wire interface (CS, SCLK, SDATA) support direct connection to microcontrollers and DSPs without level-shifting.
It operates from a single 2.7–5.25 V supply, with shutdown current as low as 2.6 µW at 5.25 V, and uses VA as both supply and reference - requiring clean bypassing (1 µF + 0.1 µF) near the VA pin. Aperture jitter is 30 ps, and full-power bandwidth reaches 11 MHz at 5 V, supporting dynamic signal capture up to ~100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit with no missing codes - ensures monotonicity and deterministic code transitions across full scale. |
| Sample Rate Range | 50–200 ksps - fully specified across entire range, eliminating need for derating at lower speeds. |
| INL / DNL | +0.14/−0.13 LSB max / +0.16/−0.09 LSB max - enables <1 LSB error in closed-loop control feedback paths. |
| SNR | 61.6 dB typical at 100 kHz input - supports >9.9 ENOB for high-fidelity sensor digitization. |
| Power Consumption | 2.34 mW at 3.6 V, 8.9 mW at 5.25 V - allows battery operation in portable systems with minimal thermal impact. |
| Aperture Jitter | 30 ps - limits sampling uncertainty to <0.05% of LSB at 100 kHz, preserving dynamic accuracy. |
| Supply Voltage | 2.7 V to 5.25 V - enables direct interfacing with common logic rails and LDO outputs without regulation overhead. |
Pinout & Package
ADC101S021CISDX/NOPB is packaged in a 6-lead WSON (3 mm × 3 mm, 0.65 mm pitch) with exposed thermal pad - pin-compatible with SOT-23-6 but offering superior thermal resistance (θJA = 94°C/W vs. 265°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog input | Single-ended input referenced to GND; accepts 0 V to VA range - requires low-impedance source to minimize sampling distortion. |
| VA | Analog supply & reference | Primary power and internal reference voltage; must be bypassed with 1 µF + 0.1 µF capacitors within 1 cm to maintain SNR. |
| GND | Analog/digital ground | Common return for analog and digital sections; center pad (for CISD(X)) must be connected to GND for thermal and noise integrity. |
| CS | Chip select | Active-low conversion trigger; falling edge initiates sampling and hold; rising edge places SDATA in high-impedance state. |
| SDATA | Serial data output | Tri-state output delivering 10-bit straight-binary result (MSB first), preceded by three zeros and followed by two zeros. |
| SCLK | Serial clock input | Controls conversion timing and data readout; supports 25 kHz–20 MHz frequency - determines maximum throughput and acquisition window. |
Key Features
| Feature | Design Value |
|---|---|
| Variable power management | Shutdown mode draws only 2.6 µW at 5.25 V - enables ultra-low-duty-cycle sensing in energy-constrained IoT nodes. |
| SPI™/QSPI™/MICROWIRE/DSP compatibility | Direct interface with TI C2000, STM32, and Renesas RL78 without protocol translation - reduces firmware overhead and PCB complexity. |
| Specified over full sample rate range | No performance interpolation required between 50 ksps and 200 ksps - simplifies system-level timing validation and eliminates worst-case margining. |
| Industrial temperature range | Guaranteed operation from −40°C to +85°C - suitable for uncontrolled environments like motor drives and outdoor telemetry units. |
| Low aperture jitter (30 ps) | Minimizes effective noise floor degradation at high input frequencies - preserves ENOB when digitizing fast transients or AC waveforms. |
Applications
| Portable Medical Sensors | Remote Environmental Monitoring |
|---|---|
|
Use Scenario: Battery-powered pulse oximeter measuring photodiode current with 10-bit resolution and sub-100 µA quiescent current. IC Role / Device Role / Timing Role: Single-channel analog front-end digitizer acquiring DC-coupled biopotential signals at 100 ksps with 61.6 dB SNR. Use Value: Enables 12+ hour runtime on coin cell via 2.34 mW active power and µW shutdown - meets IEC 60601 leakage and isolation requirements. |
Use Scenario: Solar-powered soil moisture node logging capacitance-based sensor readings every 5 minutes across −25°C to +60°C ambient. IC Role / Device Role / Timing Role: Low-drift, rail-to-rail input ADC converting conditioned analog output into SPI-streamed digital values for LoRaWAN transmission. Use Value: −40°C to +85°C rating ensures field reliability; 2.7–5.25 V supply range accommodates aging LiFePO₄ battery (3.0–3.6 V) without regulator. |
| Industrial PLC Analog Input Modules | Test & Measurement Signal Conditioners |
|
Use Scenario: DIN-rail mounted 8-channel analog input card digitizing 4–20 mA loop signals with galvanic isolation and cold-junction compensation. IC Role / Device Role / Timing Role: Per-channel SAR ADC providing synchronized 10-bit conversions at 50 ksps per channel with <±0.15 LSB linearity. Use Value: Pin-compatible family scalability (e.g., ADC121S021 for 12-bit upgrade) allows modular hardware reuse across product tiers. |
Use Scenario: Benchtop multimeter front-end capturing transient voltage spikes up to 100 kHz with calibrated DC accuracy and THD <−72.5 dB. IC Role / Device Role / Timing Role: High-fidelity digitizer using VA-referenced architecture to eliminate external reference drift and simplify calibration. Use Value: 61.5 dB SINAD minimum and 79 dB SFDR ensure compliance with ANSI C12.20 Class 0.2 metering standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC101S051CISDX/NOPB | Same 10-bit resolution, but specified for 200–500 ksps range; higher minimum sample rate and slightly reduced INL (±0.1 LSB typ). | Better suited for higher-throughput data loggers where sustained >200 ksps is required; not recommended for sub-100 ksps control loops. | Select ADC101S051CISDX/NOPB when system demands ≥200 ksps minimum sample rate and can tolerate tighter timing constraints. |
| ADC081S021CISDX/NOPB | 8-bit resolution, same 50–200 ksps range, lower power (1.4 mW at 3.6 V), and reduced SNR (50.1 dB typ). | Targeted at cost-sensitive applications like basic panel meters or LED dimmer feedback where 8-bit resolution suffices. | Choose ADC081S021CISDX/NOPB only when resolution requirement is ≤8 bits and BOM cost reduction outweighs SNR and linearity trade-offs. |
Compared with ADC101S021CISDX/NOPB, ADC101S051CISDX/NOPB trades guaranteed low-speed linearity for higher minimum throughput, while ADC081S021CISDX/NOPB sacrifices 2 bits of resolution and 11.5 dB SNR to reduce power and cost - making ADC101S021CISDX/NOPB the optimal balance for general-purpose 10-bit industrial sensing.
Availability
ADC101S021CISDX/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, remote environmental monitoring, industrial PLC analog input modules, test & measurement signal conditioners, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for ADC101S021CISDX/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 specializing in analog, embedded processing, and high-reliability ICs - with over 50 years of innovation in data converters and industrial signal chains.
ADC101S021CISDX/NOPB belongs to TI's precision SAR ADC portfolio designed for low-power, single-supply, serial-interface applications in portable, remote, and industrial systems where size, power, and ease of integration are critical.
FAQ
What is the maximum guaranteed sample rate for ADC101S021CISDX/NOPB?
The ADC101S021CISDX/NOPB is fully specified for operation up to 200 ksps - with all key parameters (INL, DNL, SNR, THD) ensured across the entire 50–200 ksps range. While the device remains functional up to 1 Msps per operating ratings, only the 50–200 ksps band guarantees datasheet performance. For designs requiring >200 ksps with full specification compliance, consider ADC101S051CISDX/NOPB instead.
Does ADC101S021CISDX/NOPB require an external voltage reference?
No, ADC101S021CISDX/NOPB uses its VA supply pin as the internal reference - eliminating need for external reference components. This simplifies layout and reduces BOM count, but requires careful VA bypassing (1 µF + 0.1 µF) to maintain 61.6 dB SNR. If higher absolute accuracy is needed, a precision external reference can be applied to VA, though this deviates from standard usage and may affect power consumption and thermal behavior.
What package type does ADC101S021CISDX/NOPB use, and is thermal pad connection mandatory?
ADC101S021CISDX/NOPB uses the 6-lead WSON package (suffix CISD/X), featuring a bottom-exposed thermal pad. Per TI's datasheet (SNAS307G), the center pad must be connected to GND for proper thermal dissipation and noise immunity - especially critical in high-resolution applications where 30 ps aperture jitter must be preserved. Omitting this connection risks increased junction temperature and degraded dynamic performance.
Can ADC101S021CISDX/NOPB interface directly with 1.8-V logic microcontrollers?
No - ADC101S021CISDX/NOPB digital pins (CS, SCLK, SDATA) tolerate voltages up to 6.5 V but have VIH/VIL thresholds tied to VA (e.g., VIH = 2.1 V min at VA = 3.6 V). Driving it from a 1.8-V MCU without level shifting violates the 2.1 V VIH minimum and risks unreliable communication. A bidirectional level shifter or 3.3-V compatible MCU (e.g., STM32L4) is required for robust SPI operation.
How does the power-down mode of ADC101S021CISDX/NOPB function, and what is its recovery time?
ADC101S021CISDX/NOPB enters shutdown mode when CS is held high before the 10th falling edge of SCLK after conversion initiation. In shutdown, supply current drops to 500 nA (typ) at 5.25 V, consuming just 2.6 µW. Recovery is immediate: the first falling edge of CS after shutdown triggers a new conversion with full performance - no wake-up delay or calibration sequence is needed, enabling microsecond-scale duty cycling in sensor nodes.
ADC101S021CISDX/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:
- 10
- Sampling Rate (Per Second):
- 200k
- 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:
- -
ADC101S021CISDX/NOPB FAQ
1.How can I place an order for ADC101S021CISDX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC101S021CISDX/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 ADC101S021CISDX/NOPB reliable?
The price and inventory of ADC101S021CISDX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC101S021CISDX/NOPB is usually 5 days.
3.What payment methods are accepted for ADC101S021CISDX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC101S021CISDX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC101S021CISDX/NOPB?
ADC101S021CISDX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC101S021CISDX/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 ADC101S021CISDX/NOPB?
For technical support, including ADC101S021CISDX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC101S021CISDX/NOPB requirements.
6.How does Aetrix verify that ADC101S021CISDX/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC101S021CISDX/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 ADC101S021CISDX/NOPB meets industry standards.
7.What is the process for return or replacement of ADC101S021CISDX/NOPB?
All ADC101S021CISDX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC101S021CISDX/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 ADC101S021CISDX/NOPB part is unused and in its original packaging.
Return procedure for ADC101S021CISDX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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