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Texas Instruments ADC082S021CIMMX/NOPB
- Part No.:
- ADC082S021CIMMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADC082S021CIMMX/NOPB.pdf
- Description:
- IC ADC 8BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,405
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Product details
Overview
ADC082S021CIMMX/NOPB from Texas Instruments is a low-power, 8-bit, dual-channel successive-approximation ADC with serial SPI-compatible interface, 50–200 ksps sample rate range, ±0.04 LSB typical INL/DNL, and 49.6 dB typical SNR - used for precision analog monitoring in portable instrumentation and remote data acquisition systems.
For engineers reviewing the ADC082S021CIMMX/NOPB datasheet, ADC082S021CIMMX/NOPB pinout, ADC082S021CIMMX/NOPB application, or ADC082S021CIMMX/NOPB equivalent, key selection considerations include its dual-input multiplexing capability, 3–5.25 V single-supply operation, 16-cycle throughput timing, power-down mode (0.12 µW at 3 V), and VSSOP-8 package compatibility with space-constrained embedded designs.
Technical Context
The ADC082S021CIMMX/NOPB implements a charge-redistribution SAR architecture with integrated track-and-hold, supporting two independent analog inputs (IN1, IN2) selected via a 3-bit control register written on DIN. Conversion is initiated by CS falling edge and synchronized to SCLK, with output data clocked MSB-first on DOUT over 13 SCLK cycles following 3-cycle acquisition.
It operates across −40°C to +85°C using a single VA supply (2.7–5.25 V), delivers straight-binary output, and maintains full AC/DC specifications across its entire 50–200 ksps sample rate range - eliminating need for derating or interpolation between discrete speed grades.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit with no missing codes - guarantees monotonicity and deterministic code mapping for control-loop feedback. |
| Sample Rate Range | 50 ksps to 200 ksps - enables flexible system-level timing without hardware reconfiguration. |
| INL / DNL | ±0.04 LSB typical - ensures <0.2 LSB max linearity error for accurate sensor signal digitization. |
| SNR | 49.6 dB typical at 39.9 kHz input - supports >7.9 ENOB for mid-range precision measurement applications. |
| Power Consumption | 1.6 mW at 3 V / 5.8 mW at 5 V (normal mode); 0.12 µW at 3 V (shutdown) - enables battery-operated longevity. |
| Supply Range | +2.7 V to +5.25 V - interoperable with common LDOs and mixed-voltage microcontroller I/O domains. |
| Interface | SPI/QSPI/MICROWIRE-compatible serial interface - simplifies integration with TI C2000, MSP430, and ARM Cortex-M MCUs. |
Pinout & Package
ADC082S021CIMMX/NOPB is housed in an 8-lead VSSOP (DGK0008A) package - 2.3 mm × 2.0 mm footprint, 0.5 mm pitch, thin-profile surface-mount design suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Falling-edge-triggered frame initiator; controls conversion start, serial framing, and tri-state output enable. |
| SCLK | Serial Clock Input | Master-synchronized timing source; directly governs acquisition (3 cycles), conversion (13 cycles), and data transfer. |
| DOUT | Digital Output | MSB-first serial data output; active only when CS is low; high-impedance when CS is high. |
| DIN | Digital Input | Control register load path; accepts 8-bit command (ADD2:ADD0) on first 8 rising SCLK edges after CS fall. |
| IN1 / IN2 | Analog Inputs | Single-ended inputs referenced to GND; voltage range = 0 V to VA; support channel-selectable sampling. |
| VA | Analog Supply | Single positive supply (2.7–5.25 V); also serves as internal reference - requires local 1 µF + 0.1 µF bypassing. |
| GND | Analog Ground | Common return for analog circuitry; must be low-impedance and separated from digital ground where possible. |
Key Features
| Feature | Design Value |
|---|---|
| Two-channel multiplexed input | Reduces component count in dual-sensor systems (e.g., temperature + pressure) without external MUX. |
| Full-speed specification across 50–200 ksps | Eliminates need for multiple speed-bin variants - one BOM item covers variable throughput requirements. |
| 16-cycle deterministic throughput | Enables precise timing budgeting in real-time firmware - acquisition (3 SCLK) + conversion/readout (13 SCLK). |
| 0.12 µW shutdown current at 3 V | Extends battery life in wake-on-event architectures - e.g., sensor node sleeps until CS assertion. |
| Straight-binary output format | Direct compatibility with unsigned integer arithmetic in MCU firmware - no offset binary decoding required. |
Applications
| Portable Medical Sensors | Industrial Remote I/O Modules |
|---|---|
Use Scenario: Battery-powered wearable ECG front-end digitizing two biopotential channels (RA/LA) with low-noise analog conditioning. IC Role / Device Role / Timing Role: Dual-channel ADC acquiring synchronized analog signals at 100 ksps, interfacing directly to ultra-low-power MCU via SPI. Use Value: 49.6 dB SNR and ±0.04 LSB linearity preserve diagnostic fidelity; 1.6 mW consumption extends 7-day runtime on coin cell. | Use Scenario: DIN-rail mounted PLC analog input card measuring 4–20 mA loop sensors and thermocouple outputs across distributed field nodes. IC Role / Device Role / Timing Role: Precision digitizer for two independent process variables, operating continuously at 50 ksps with industrial-grade temperature stability. Use Value: −40°C to +85°C rating and 0.2 LSB max INL ensure repeatable calibration over ambient extremes; VSSOP-8 eases conformal coating and thermal management. |
| Automotive Cabin Environment Monitoring | Smart Building HVAC Controllers |
Use Scenario: In-vehicle air quality module sampling CO₂ and humidity sensors inside confined cabin space with strict EMI constraints. IC Role / Device Role / Timing Role: Low-emission ADC converting differential sensor outputs with minimal digital switching noise coupling into analog paths. Use Value: Single 3.3 V supply eliminates level-shifting; 73 dB channel-to-channel crosstalk prevents cross-talk between gas/humidity readings. | Use Scenario: Wall-mounted thermostat integrating temperature, occupancy, and ambient light sensing with wireless reporting every 30 seconds. IC Role / Device Role / Timing Role: Power-gated ADC activated on timer interrupt to digitize two environmental inputs before deep-sleep MCU cycle. Use Value: 0.12 µW shutdown current minimizes quiescent drain; 8-bit resolution matches HVAC control precision requirements without overspec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC082S051CIMMX/NOPB | Same pinout and architecture; rated for 200–500 ksps sample range - higher minimum speed, identical 8-bit resolution. | Required where minimum throughput exceeds 200 ksps (e.g., ultrasonic time-of-flight sensing). | Select ADC082S051CIMMX/NOPB only if system demands guaranteed ≥200 ksps sustained sampling - not for drop-in replacement at lower rates. |
| ADC102S021CIMMX/NOPB | Pin-compatible 10-bit variant; same 50–200 ksps range but higher resolution (10-bit), increased power (2.2 mW @3V), and slightly longer conversion time. | Suitable when additional 2 bits of dynamic range are needed for low-amplitude sensor signals (e.g., MEMS microphone preamp output). | Choose ADC102S021CIMMX/NOPB when ENOB >8.5 is required and 2.2 mW power budget is acceptable - otherwise ADC082S021CIMMX/NOPB offers optimal cost/power/precision balance. |
Compared with ADC082S051CIMMX/NOPB and ADC102S021CIMMX/NOPB, the ADC082S021CIMMX/NOPB provides the lowest power and most cost-effective solution for 8-bit dual-channel acquisition at ≤200 ksps, while maintaining identical PCB layout and firmware interface - making it ideal for battery-powered and cost-sensitive industrial endpoints.
Availability
ADC082S021CIMMX/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, industrial remote I/O modules, and smart building HVAC controllers requiring stable component supply across multi-year production cycles.
Supply support for ADC082S021CIMMX/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, energy efficiency, and system-level integration.
The ADC082S021CIMMX/NOPB belongs to TI's precision SAR ADC product line, engineered for low-power, multi-channel data acquisition in space- and energy-constrained embedded systems - targeting instrumentation, portable diagnostics, and distributed sensing.
FAQ
What is the maximum clock frequency supported by ADC082S021CIMMX/NOPB?
The ADC082S021CIMMX/NOPB supports a maximum SCLK frequency of 3.2 MHz, as specified in its AC Electrical Characteristics table. This clock drives both conversion timing and serial data transfer; operation above this limit may cause timing violations or invalid output data. The device remains functional down to 0.8 MHz, enabling flexible interface design with slower microcontrollers or clock dividers.
Does ADC082S021CIMMX/NOPB require an external reference voltage?
No, ADC082S021CIMMX/NOPB uses its VA supply pin as the internal reference - the full-scale range is 0 V to VA. No external reference is needed, simplifying BOM and layout. However, VA must be well-bypassed (1 µF + 0.1 µF capacitors within 1 cm) to maintain SNR and linearity, as supply noise directly modulates conversion accuracy.
How is channel selection implemented on ADC082S021CIMMX/NOPB?
Channel selection is controlled via a 3-bit ADD2:ADD0 field in the 8-bit control register loaded on DIN during each serial frame. Writing '00' selects IN1 (default), '01' selects IN2, and '1x' is invalid. The register is updated before the next conversion cycle, enabling dynamic per-frame channel switching without reinitialization or delay.
What is the power-down behavior of ADC082S021CIMMX/NOPB when CS is high?
When CS is held high, ADC082S021CIMMX/NOPB enters shutdown mode, drawing only 0.12 µW at 3 V or 0.35 µW at 5 V. All internal circuitry (including reference, comparator, and DAC) is disabled, and DOUT enters high-impedance state. Conversion resumes immediately on the next CS falling edge - no wake-up delay or dummy cycles are required.
Is ADC082S021CIMMX/NOPB compatible with standard SPI modes?
Yes, ADC082S021CIMMX/NOPB is compatible with SPI Mode 0 (CPOL = 0, CPHA = 0): data is sampled on the falling edge of SCLK and shifted out MSB-first on DOUT, while DIN loads on rising SCLK edges. It also interoperates with QSPI and MICROWIRE protocols due to its unidirectional clocked I/O and frame-based CS control.
ADC082S021CIMMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-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:
- 8-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC082S021CIMMX/NOPB FAQ
1.How can I place an order for ADC082S021CIMMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC082S021CIMMX/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 ADC082S021CIMMX/NOPB reliable?
The price and inventory of ADC082S021CIMMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC082S021CIMMX/NOPB is usually 5 days.
3.What payment methods are accepted for ADC082S021CIMMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC082S021CIMMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC082S021CIMMX/NOPB?
ADC082S021CIMMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC082S021CIMMX/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 ADC082S021CIMMX/NOPB?
For technical support, including ADC082S021CIMMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC082S021CIMMX/NOPB requirements.
6.How does Aetrix verify that ADC082S021CIMMX/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC082S021CIMMX/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 ADC082S021CIMMX/NOPB meets industry standards.
7.What is the process for return or replacement of ADC082S021CIMMX/NOPB?
All ADC082S021CIMMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC082S021CIMMX/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 ADC082S021CIMMX/NOPB part is unused and in its original packaging.
Return procedure for ADC082S021CIMMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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