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Texas Instruments ADC081C021CIMM/NOPB
- Part No.:
- ADC081C021CIMM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADC081C021CIMM/NOPB.pdf
- Description:
- IC ADC 8BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,305
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Product details
Overview
ADC081C021CIMM/NOPB from Texas Instruments is an I²C-compatible, 8-bit successive-approximation ADC with alert output, operating from +2.7V to +5.5V supply and delivering 188.9 ksps maximum throughput. It integrates internal track-and-hold, uses VA as both supply and reference, and features programmable out-of-range interrupt for system monitoring in portable medical and test equipment.
For engineers reviewing the ADC081C021CIMM/NOPB datasheet, ADC081C021CIMM/NOPB pinout, ADC081C021CIMM/NOPB application, or ADC081C021CIMM/NOPB equivalent, key selection factors include its SOT-6 package with dedicated ALERT pin, ±0.2 LSB INL/DNL accuracy, 1 µs conversion time, automatic power-down (<1 µW), and I²C high-speed mode (3.4 MHz) support.
Technical Context
The ADC081C021CIMM/NOPB implements a charge-redistribution DAC architecture with internal track-and-hold, enabling full-scale input bandwidth up to 11 MHz at 5 V. Its analog input range is strictly 0 V to VA, and it requires VA to be low-noise and well-decoupled.
It operates in three I²C modes-standard (100 kHz), fast (400 kHz), and high speed (3.4 MHz)-with open-drain SCL/SDA pins rated for ±8 kV HBM ESD protection. The ALERT pin is open-drain and configurable active-high or active-low, asserting when VIN violates user-defined upper/lower limits stored in Alert Limit Registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits with no missing codes - guarantees monotonic transfer function and deterministic code mapping across full scale. |
| Conversion Time | 1 µs typical - enables minimum 188.9 ksps sampling rate in high-speed I²C mode, suitable for real-time voltage monitoring. |
| INL / DNL | ±0.2 LSB max - ensures <0.1% linearity error over temperature (−40°C to +105°C), critical for precision threshold detection. |
| Power Consumption | 0.26 mW at 3 V / 22 ksps - ultra-low quiescent draw supports battery-powered operation without sacrificing update rate. |
| Supply Range | +2.7 V to +5.5 V - interoperable with common logic rails (3.3 V, 5 V) and eliminates need for external reference or LDO. |
| I²C Speed Modes | Supports standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) - allows flexible bus loading and multi-device timing coordination. |
| Alert Function | Dedicated open-drain ALERT output - provides hardware interrupt on out-of-range condition, reducing host MCU polling overhead. |
Pinout & Package
SOT-6 package (DDC) with 1.6 mm × 1.6 mm footprint, lead pitch 0.95 mm, and exposed pad not connected. Pinout validated per TI SNAS447C Rev. March 2013, Figure 1 and Table "Package Pinouts".
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VA) | Supply & Reference Input | Single-pin dual-function: powers internal circuitry and serves as unbuffered ADC reference; must be decoupled to GND with low-ESR capacitor. |
| 2 (GND) | Analog/Digital Ground | Common return for all internal circuitry; requires low-impedance connection to system ground plane to minimize noise coupling. |
| 3 (VIN) | Analog Input | Single-ended input with 0 V to VA range; input capacitance 30 pF in track mode, requiring low-source-impedance drive (<100 Ω) for dynamic signals. |
| 4 (ALERT) | Digital Output | Open-drain interrupt output; requires external pull-up to VA; asserts when VIN exceeds programmable high/low limits. |
| 5 (SCL) | I²C Clock Input | Open-drain clock line with 8 kV HBM ESD rating; must be pulled up externally; controls data transfer timing on I²C bus. |
| 6 (SDA) | I²C Data I/O | Open-drain bidirectional data line with 8 kV HBM ESD rating; shares bus with other I²C devices; requires external pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Down Mode | Reduces supply current to ≤0.2 µA when idle - extends battery life in intermittent-monitoring applications without software intervention. |
| Programmable Alert Thresholds | Upper and lower limits stored in dedicated registers - enables autonomous voltage window monitoring without continuous host polling. |
| Internal Track-and-Hold | Supports 11 MHz full-power input bandwidth at 5 V - captures fast transients in system supply or sensor outputs without external circuitry. |
| Three I²C Speed Modes | Enables coexistence with legacy (100 kHz) and high-performance (3.4 MHz) I²C peripherals on same bus - simplifies mixed-speed system design. |
| ±8 kV HBM ESD Protection (SCL/SDA) | Eliminates need for external TVS diodes on I²C lines - reduces BOM count and PCB area in space-constrained portable instruments. |
Applications
| Battery-Powered Medical Sensors | Industrial Power Supply Monitoring |
|---|---|
Use Scenario: Continuous monitoring of Li-ion cell voltage or ECG electrode bias in handheld diagnostic devices. IC Role / Device Role / Timing Role: ADC081C021CIMM/NOPB performs single-channel, high-throughput voltage digitization with autonomous alert on overvoltage/undervoltage. Use Value: Enables 188.9 ksps sampling for transient capture while consuming only 0.26 mW at 3 V - extending operational runtime between charges. | Use Scenario: Real-time tracking of 3.3 V or 5 V rail stability in PLC I/O modules during load switching events. IC Role / Device Role / Timing Role: ADC081C021CIMM/NOPB acts as watchdog ADC, triggering ALERT interrupt if rail deviates beyond ±2% tolerance band. Use Value: Provides hardware-level fault response without CPU involvement, improving system reliability and reducing firmware complexity. |
| Portable Test & Measurement Tools | Embedded Peak Detection Systems |
Use Scenario: Voltage logging in handheld multimeters or battery testers where size and power efficiency are critical. IC Role / Device Role / Timing Role: ADC081C021CIMM/NOPB serves as primary analog front-end digitizer with integrated alert for out-of-spec measurements. Use Value: SOT-6 package (1.6 × 1.6 mm) and no external reference reduce PCB area by >40% vs. discrete reference + ADC solutions. | Use Scenario: Capturing peak amplitude of pulse-width modulated motor control signals or audio envelope detection. IC Role / Device Role / Timing Role: ADC081C021CIMM/NOPB operates in automatic conversion mode, continuously updating Highest/Lowest Conversion Registers. Use Value: Eliminates need for host-controlled sampling loops - delivers true hardware-accelerated peak hold with 1 µs conversion latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC081C027CIMM/NOPB | SOT-6 package with ADDR pin instead of ALERT; supports 3 I²C addresses vs. fixed address on ADC081C021CIMM/NOPB. | Lacks hardware alert interrupt; suited for multi-drop bus systems requiring address flexibility over autonomous monitoring. | Select ADC081C027CIMM/NOPB when address selection is required and alert functionality is handled externally or in firmware. |
| ADC101C021CIMM/NOPB | 10-bit resolution, same SOT-6 package and pinout; identical I²C interface, alert function, and power specs. | Higher resolution enables finer threshold granularity (e.g., ±5 mV vs. ±20 mV at 5 V), but increases data handling overhead. | Choose ADC101C021CIMM/NOPB when improved measurement fidelity justifies added software complexity and marginally higher cost. |
Compared with ADC081C027CIMM/NOPB, the ADC081C021CIMM/NOPB prioritizes autonomous fault detection over bus address scalability; versus ADC101C021CIMM/NOPB, it trades resolution for lower MCU processing load and reduced memory usage in resource-constrained embedded designs.
Availability
ADC081C021CIMM/NOPB is available at Aetrix Electronics and suitable for battery-powered medical sensors, industrial power supply monitoring, and portable test equipment requiring stable component supply and long-term production continuity.
Supply support for ADC081C021CIMM/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 ICs.
The ADC081C021CIMM/NOPB belongs to TI's ultra-low-power, I²C-compatible ADC family designed specifically for compact, energy-efficient system monitoring in portable and harsh-environment applications.
FAQ
What is the absolute maximum input voltage for ADC081C021CIMM/NOPB?
The absolute maximum analog input voltage for ADC081C021CIMM/NOPB is VA + 0.3 V, with VA ranging from +2.7 V to +5.5 V. Exceeding this causes ESD diode conduction and erratic behavior. The specified operating input range is strictly 0 V to VA, and the device does not include input clamping circuitry - external protection must be added if overvoltage risk exists.
Does ADC081C021CIMM/NOPB require an external reference voltage?
No, ADC081C021CIMM/NOPB does not require an external reference. It uses VA (pin 1) as both supply and reference voltage, with LSB = VA / 256. This simplifies design by eliminating external reference components and associated layout sensitivity, though VA must be low-noise and well-decoupled to maintain ±0.2 LSB linearity.
How does the ALERT function operate in ADC081C021CIMM/NOPB?
The ALERT pin on ADC081C021CIMM/NOPB is an open-drain output that asserts (pulls low) when the latest conversion result falls outside programmable upper or lower limit registers. It remains asserted until the limit violation clears or the status register is read. Configuration is done via I²C writes to Alert Limit Registers; no external components are needed beyond a pull-up resistor to VA.
What I²C bus speeds does ADC081C021CIMM/NOPB support?
ADC081C021CIMM/NOPB supports all three standard I²C modes: standard mode (100 kHz), fast mode (400 kHz), and high-speed mode (3.4 MHz at Cb ≤ 100 pF). Timing compliance is verified per I²C specification, including minimum tLOW/tHIGH, setup/hold times, and rise/fall characteristics - enabling reliable operation in mixed-speed bus environments.
Is ADC081C021CIMM/NOPB pin-compatible with any higher-resolution variants?
Yes, ADC081C021CIMM/NOPB is pin-compatible with ADC101C021CIMM/NOPB (10-bit) and ADC121C021CIMM/NOPB (12-bit) in the same SOT-6 package. All share identical pinout, I²C interface, ALERT functionality, power requirements, and operating temperature range (−40°C to +105°C), enabling resolution upgrades without PCB redesign.
ADC081C021CIMM/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):
- 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:
- 8-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC081C021CIMM/NOPB FAQ
1.How can I place an order for ADC081C021CIMM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC081C021CIMM/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 ADC081C021CIMM/NOPB reliable?
The price and inventory of ADC081C021CIMM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC081C021CIMM/NOPB is usually 5 days.
3.What payment methods are accepted for ADC081C021CIMM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC081C021CIMM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC081C021CIMM/NOPB?
ADC081C021CIMM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC081C021CIMM/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 ADC081C021CIMM/NOPB?
For technical support, including ADC081C021CIMM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC081C021CIMM/NOPB requirements.
6.How does Aetrix verify that ADC081C021CIMM/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC081C021CIMM/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 ADC081C021CIMM/NOPB meets industry standards.
7.What is the process for return or replacement of ADC081C021CIMM/NOPB?
All ADC081C021CIMM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC081C021CIMM/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 ADC081C021CIMM/NOPB part is unused and in its original packaging.
Return procedure for ADC081C021CIMM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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