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Texas Instruments ADC081C021CIMK/NOPB
- Part No.:
- ADC081C021CIMK/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
ADC081C021CIMK/NOPB.pdf
- Description:
- IC ADC 8BIT SAR 6TSOT
- Quantity:
- Payment:
- Shipping:
Inventory:5,791
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Product details
Overview
ADC081C021CIMK/NOPB from Texas Instruments is an I²C-compatible, 8-bit successive-approximation ADC operating from a single +2.7V to +5.5V supply, featuring alert output, 1 µs conversion time, ±0.2 LSB INL/DNL, and integrated track-and-hold for inputs up to 11 MHz - used in system monitoring and portable instrumentation.
For engineers reviewing the ADC081C021CIMK/NOPB datasheet, ADC081C021CIMK/NOPB pinout, ADC081C021CIMK/NOPB application, or ADC081C021CIMK/NOPB equivalent, key selection factors include its SOT-6 package with dedicated ALERT pin, programmable out-of-range interrupt, automatic conversion mode, and support for I²C high-speed mode (3.4 MHz).
Technical Context
The ADC081C021CIMK/NOPB implements a charge-redistribution DAC architecture with internal track-and-hold, enabling accurate sampling of analog signals up to 11 MHz full-power bandwidth. Its I²C interface supports standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) modes, with open-drain SCL/SDA pins rated for ±8 kV HBM ESD protection.
It operates in three power states: continuous conversion (0.26 mW at 3 V), automatic conversion (1.35 mW at 3 V), and power-down (0.9 µW max). Alert functionality uses user-programmable upper/lower limit registers and hysteresis to generate an open-drain interrupt on out-of-range events without host polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits with no missing codes - guarantees monotonic transfer function and deterministic digital output across full input range. |
| Conversion Time | 1 µs typical - enables maximum throughput of 188.9 ksps, suitable for real-time voltage monitoring in fast-response systems. |
| INL / DNL | ±0.2 LSB max - ensures high code-to-code linearity critical for precision threshold detection and peak capture applications. |
| Supply Range | +2.7V to +5.5V - allows direct interfacing with common logic rails (3.3 V, 5 V) without external regulators or level shifters. |
| Alert Function | Programmable upper/lower limits with hysteresis - eliminates software polling and reduces host MCU wake-up frequency in battery-powered devices. |
| ESD Rating | ±8 kV HBM on SDA/SCL - permits robust multi-board I²C bus deployment without external TVS diodes. |
| Operating Temp | −40°C to +105°C - qualified for industrial and medical environments where ambient thermal stress is present. |
Pinout & Package
ADC081C021CIMK/NOPB is housed in a 6-pin SOT-23 (SOT-6) package with exposed pad (package code DDC), measuring 2.9 mm × 1.6 mm × 1.0 mm. Pin 1 is ALERT, pin 2 is GND, pin 3 is VIN, pin 4 is VA, pin 5 is SCL, and pin 6 is SDA.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| ALERT | Digital open-drain output | Asserts low when VIN exceeds programmed limits; requires external pull-up to VA for proper logic level and noise immunity. |
| GND | Analog/digital ground reference | Common return path for VA, VIN, and internal logic; must be low-impedance and decoupled near device. |
| VIN | Analog input | Accepts 0 V to VA range; input impedance ~500 Ω in track mode; requires <100 Ω source impedance for full accuracy. |
| VA | Supply and reference voltage | Serves as both power rail and unbuffered ADC reference; must be low-noise and bypassed with ≥0.1 µF ceramic capacitor. |
| SCL | I²C clock input | Open-drain, 8 kV HBM protected; requires external pull-up; controls timing of data transfers on SDA line. |
| SDA | I²C bidirectional data | Open-drain, 8 kV HBM protected; shares bus with other I²C devices; supports multi-master arbitration. |
Key Features
| Feature | Design Value |
|---|---|
| Alert interrupt with hysteresis | Reduces host processor load by eliminating periodic polling; enables autonomous overvoltage/undervoltage detection in sleep-mode systems. |
| Automatic conversion mode | Configurable sample interval (via Configuration Register bits D7–D5) allows continuous background monitoring without CPU intervention. |
| I²C high-speed mode support | 3.4 MHz clock rate enables rapid register reads and minimizes bus occupancy during burst acquisition sequences. |
| Ultra-low power-down current | <0.2 µA max in PD1 mode - extends battery life in intermittently active sensor nodes and portable diagnostics equipment. |
| Single-supply operation | Eliminates need for separate analog/digital supplies or external reference ICs, reducing BOM count and PCB area. |
Applications
| System Monitoring | Peak Detection |
|---|---|
Use Scenario: Real-time tracking of supply rail voltages (e.g., 3.3 V, 5 V) and battery levels in embedded controllers. IC Role / Device Role / Timing Role: ADC081C021CIMK/NOPB acts as a dedicated voltage supervisor with programmable thresholds and interrupt-driven reporting. Use Value: Enables immediate fault response (e.g., shutdown, alert) without consuming MCU cycles for polling or calibration. | Use Scenario: Capturing transient voltage peaks in motor drive feedback loops or surge-prone power supplies. IC Role / Device Role / Timing Role: ADC081C021CIMK/NOPB performs high-throughput sampling (up to 188.9 ksps) and stores extremum values in internal Highest/Lowest Conversion Registers. Use Value: Delivers accurate peak amplitude measurement without requiring external memory or high-speed microcontroller peripherals. |
| Portable Instruments | Medical Instruments |
Use Scenario: Battery-powered handheld multimeters and environmental sensors requiring long runtime and compact form factor. IC Role / Device Role / Timing Role: ADC081C021CIMK/NOPB serves as the primary analog front-end digitizer with ultra-low quiescent power (0.26 mW at 3 V). Use Value: Extends operational time between charges while maintaining resolution and alert responsiveness for safety-critical thresholds. | Use Scenario: Vital sign monitors (e.g., blood pressure cuffs, pulse oximeters) needing reliable, low-noise analog sensing in clinical settings. IC Role / Device Role / Timing Role: ADC081C021CIMK/NOPB digitizes conditioned biopotential or transducer signals with ±0.2 LSB linearity and −40°C to +105°C operation. Use Value: Ensures diagnostic accuracy across temperature extremes and meets IEC 60601-1 EMC/ESD requirements via built-in 8 kV HBM protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC081C027CIMK/NOPB | SOT-6 package with ADDR pin instead of ALERT; supports 3 I²C addresses vs. fixed address on ADC081C021CIMK/NOPB. | Lacks hardware alert output; requires software-based threshold checking via periodic register reads. | Select when multiple identical ADCs share one I²C bus and alert functionality is handled externally or in firmware. |
| ADC101C021CIMK/NOPB | 10-bit resolution, same SOT-6 package and pinout; higher ENOB (8.5 bits), lower SNR floor (54 dB), and identical alert/alert hysteresis architecture. | Delivers finer voltage quantization (≈3.9 mV LSB at 5 V vs. 19.5 mV for ADC081C021CIMK/NOPB); increases storage and processing overhead. | Select when improved resolution justifies higher cost and marginally increased power (0.33 mW at 3 V vs. 0.26 mW). |
Compared with ADC081C027CIMK/NOPB, ADC081C021CIMK/NOPB provides immediate hardware-triggered fault signaling; compared with ADC101C021CIMK/NOPB, it trades resolution for lower system latency, reduced data handling, and minimal power draw in resource-constrained edge nodes.
Availability
ADC081C021CIMK/NOPB is available at Aetrix Electronics and suitable for system monitoring, portable instrumentation, and medical device design requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ADC081C021CIMK/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 connectivity technologies, with decades of expertise in precision data converters and industrial-grade signal chain solutions.
ADC081C021CIMK/NOPB belongs to TI's low-power, I²C-compatible ADC family designed for space-constrained, battery-operated, and real-time monitoring applications where autonomous alerting and minimal host intervention are essential.
FAQ
What is the maximum I²C clock frequency supported by ADC081C021CIMK/NOPB?
ADC081C021CIMK/NOPB supports I²C high-speed mode up to 3.4 MHz with 100 pF bus capacitance, enabling rapid register access and minimizing bus contention in multi-device systems. At 400 kHz (fast mode), it achieves 22.2 ksps throughput; at 3.4 MHz, maximum throughput reaches 188.9 ksps. The device maintains full specification compliance across all three I²C speed grades.
Does ADC081C021CIMK/NOPB require an external reference voltage?
No, ADC081C021CIMK/NOPB uses its VA supply pin as both power source and unbuffered reference voltage, eliminating the need for external references or precision voltage dividers. VA must be clean and well-decoupled (≥0.1 µF ceramic capacitor) to maintain ±0.2 LSB linearity and avoid noise-induced conversion errors.
How does the ALERT pin function in ADC081C021CIMK/NOPB?
The ALERT pin on ADC081C021CIMK/NOPB is an open-drain output that asserts low when the VIN voltage exceeds either the programmable upper or lower limit register values. It includes configurable hysteresis to prevent chatter near threshold boundaries and operates autonomously in automatic conversion mode - no host polling required.
What is the power consumption of ADC081C021CIMK/NOPB in power-down mode?
In Power-Down Mode 1 (PD1), where the I²C interface is idle and the device is fully quiescent, ADC081C021CIMK/NOPB draws ≤0.2 µA at +2.7V to +5.5V, resulting in ≤0.9 µW max power consumption. This enables multi-year battery operation in intermittent-sensing applications such as wireless sensor nodes and portable diagnostics tools.
Is ADC081C021CIMK/NOPB pin-compatible with other members of the ADC081C02x family?
Yes, ADC081C021CIMK/NOPB in SOT-6 is pin-compatible with ADC081C027CIMK/NOPB (same footprint), differing only in pin function: ADC081C021CIMK/NOPB has ALERT on pin 1, while ADC081C027CIMK/NOPB has ADDR on pin 4. Both share identical VA, GND, VIN, SCL, and SDA connections, allowing board-level substitution with firmware adaptation.
ADC081C021CIMK/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 188.9k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- I2C
- 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 ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- TSOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC081C021CIMK/NOPB FAQ
1.How can I place an order for ADC081C021CIMK/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC081C021CIMK/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 ADC081C021CIMK/NOPB reliable?
The price and inventory of ADC081C021CIMK/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC081C021CIMK/NOPB is usually 5 days.
3.What payment methods are accepted for ADC081C021CIMK/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC081C021CIMK/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC081C021CIMK/NOPB?
ADC081C021CIMK/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC081C021CIMK/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 ADC081C021CIMK/NOPB?
For technical support, including ADC081C021CIMK/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC081C021CIMK/NOPB requirements.
6.How does Aetrix verify that ADC081C021CIMK/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC081C021CIMK/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 ADC081C021CIMK/NOPB meets industry standards.
7.What is the process for return or replacement of ADC081C021CIMK/NOPB?
All ADC081C021CIMK/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC081C021CIMK/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 ADC081C021CIMK/NOPB part is unused and in its original packaging.
Return procedure for ADC081C021CIMK/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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