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Texas Instruments ADC081S021CIMFX/NOPB
- Part No.:
- ADC081S021CIMFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
ADC081S021CIMFX/NOPB.pdf
- Description:
- IC ADC 8BIT SAR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,795
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Product details
Overview
ADC081S021CIMFX/NOPB from Texas Instruments is a single-channel, 8-bit successive-approximation analog-to-digital converter (SAR ADC) with SPI-compatible serial interface, operating from 2.7 V to 5.25 V supply and delivering 50–200 ksps sample rates. It features internal track-and-hold, straight-binary output, ±0.03 LSB typical INL/DNL, and 49.6 dB typical SNR at 100 kHz input - deployed in portable instrumentation for low-power, space-constrained signal digitization.
For engineers reviewing the ADC081S021CIMFX/NOPB datasheet, ADC081S021CIMFX/NOPB pinout, ADC081S021CIMFX/NOPB application, or ADC081S021CIMFX/NOPB equivalent, key selection criteria include guaranteed performance across variable throughput (not just fixed rate), ultra-low shutdown power (2.6 µW), SOT-23/WSON package compatibility, and SPI/QSPI/MICROWIRE interface timing compliance.
Technical Context
The ADC081S021CIMFX/NOPB implements a charge-redistribution SAR architecture with integrated track-and-hold, enabling precise sampling over its full 50–200 ksps range without external hold circuitry. Its conversion cycle requires exactly 16 SCLK falling edges to output three leading zeros, eight data bits (MSB-first), and four trailing zeros.
Functional mode control is entirely CS-driven: normal operation initiates on CS fall and sustains until CS rise after ≥10 SCLK edges; shutdown activates if CS rises between the 2nd and 10th SCLK falling edge, reducing supply current to 500 nA (typical) and power to 2.6 µW at 5.25 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit with no missing codes - ensures monotonicity and deterministic code transitions for control-loop feedback. |
| Sample Rate Range | 50–200 ksps - fully characterized across this band, eliminating need for derating at intermediate rates. |
| INL / DNL | ±0.03 LSB (typical) - supports accurate DC measurement and low-distortion AC acquisition in sensor interfaces. |
| SNR | 49.6 dB (typical, fIN = 100 kHz) - enables ~8.0 ENOB for medium-fidelity signal capture in battery-powered systems. |
| Supply Voltage | 2.7 V to 5.25 V - interoperable with common logic rails (3.3 V, 5 V) and compatible with Li-ion/Li-Po battery discharge profiles. |
| Shutdown Power | 2.6 µW (5.25 V) - allows microamp-level system sleep states without sacrificing wake-up latency (<1 µs). |
| Interface Compatibility | SPI™, QSPI™, MICROWIRE™, DSP serial - eliminates protocol translation hardware in MCU-based data loggers. |
Pinout & Package
ADC081S021CIMFX/NOPB is available in a 6-pin SOT-23 (DBV) package measuring 2.50 mm × 2.20 mm, optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VA | Positive analog supply | Must be bypassed with 1-µF + 0.1-µF capacitors within 1 cm; powers analog core and sets VIN full-scale range (0 to VA). |
| 2 - GND | Analog/digital ground reference | Single ground return for supply and signals; requires low-impedance connection to system ground plane. |
| 3 - VIN | Analog input | Single-ended input with 0–VA range; input capacitance is 30 pF (track) / 4 pF (hold) - impacts anti-alias filter design. |
| 4 - SCLK | Serial clock input | Controls conversion timing and data readout; supports 1–4 MHz frequency; duty cycle 40–60% required. |
| 5 - SDATA | Serial data output | Tri-state CMOS output; delivers 15-bit frame (3+8+4) on falling SCLK edges; high-impedance when CS high or post-16th edge. |
| 6 - CS | Chip select / mode control | Falling edge initiates conversion; rising edge before 10th SCLK triggers shutdown; rising edge after 16th SCLK idles interface. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-rate characterization | Full electrical specs guaranteed across 50–200 ksps - avoids interpolation uncertainty in variable-throughput applications. |
| Variable power management | CS-controlled shutdown reduces current to 500 nA (typical), enabling adaptive power scaling in intermittent-sampling systems. |
| Straight-binary output format | Eliminates 2's-complement decoding overhead in firmware; LSB weight = VA/256 - simplifies voltage-to-code mapping. |
| Low aperture jitter | 30 ps (typical) - preserves SNR at higher input frequencies and supports undersampling of narrowband signals. |
| Industrial temperature range | −40°C to +85°C operation - validated for embedded industrial sensors and automotive cabin electronics. |
Applications
| Portable Data Loggers | Remote Sensor Nodes |
|---|---|
|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and light intensity at 100 ksps intervals. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs; provides SPI-ready data to ultra-low-power MCU with minimal GPIO overhead. Use Value: 2.6 µW shutdown power extends multi-year battery life; 50–200 ksps flexibility accommodates burst-mode sampling without firmware reconfiguration. |
Use Scenario: Wireless IoT nodes transmitting sensor data via LoRaWAN or NB-IoT, requiring infrequent but precise analog measurements. IC Role / Device Role / Timing Role: Low-quiescent ADC interfacing with op-amp front-end; CS-triggered conversion synchronizes with radio transmit windows. Use Value: Sub-µA shutdown current minimizes baseline drain; 1 µs power-up time enables rapid wake-and-measure cycles aligned to network duty cycles. |
| Industrial Control Panels | Medical Diagnostic Handhelds |
|
Use Scenario: Panel-mounted PLC I/O modules acquiring analog process variables (4–20 mA loop signals) in factory automation cabinets. IC Role / Device Role / Timing Role: Signal-chain ADC converting isolated current/voltage inputs; operates continuously at 200 ksps for real-time monitoring. Use Value: ±0.03 LSB INL ensures <0.1% full-scale accuracy over temperature; SOT-23 footprint eases thermal management in dense backplane designs. |
Use Scenario: Portable ECG or pulse oximetry devices digitizing biopotential signals with minimal size and power budget constraints. IC Role / Device Role / Timing Role: Front-end ADC capturing filtered bio-signals; SPI interface reduces MCU pin count and routing complexity. Use Value: 49.6 dB SNR supports clean 8-bit waveform capture; −40°C to +85°C rating validates operation across clinical and field environments. |
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 |
|---|---|---|---|
| ADS7822IDR | 8-bit, 200 ksps, 2.7–5.25 V, SPI interface; requires external reference; no integrated track-and-hold. | Lacks internal T/H - demands external op-amp buffer and precise timing coordination for AC-coupled inputs. | Select when reference voltage must be independently sourced or when board area permits discrete T/H implementation. |
| MAX11100AUT+T | 8-bit, 200 ksps, 2.7–3.6 V only; SPI-compatible; integrated reference; 1.5 µW shutdown power. | Narrower supply range limits use with 5 V systems; lower shutdown power but no 5.25 V support. | Prefer for 3.3 V-only designs prioritizing lowest possible sleep current; avoid in mixed-voltage or legacy 5 V platforms. |
Compared with ADS7822IDR and MAX11100AUT+T, ADC081S021CIMFX/NOPB uniquely combines guaranteed multi-rate performance, internal track-and-hold, and full 2.7–5.25 V operation - making it optimal for compact, supply-flexible, and timing-simple embedded ADC implementations.
Availability
ADC081S021CIMFX/NOPB is available at Aetrix Electronics and suitable for portable data loggers, remote sensor nodes, and industrial control panels requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for ADC081S021CIMFX/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 and embedded processing technologies, with decades of expertise in precision data converters and low-power signal chain solutions.
The ADC081S021CIMFX/NOPB belongs to TI's precision SAR ADC portfolio designed for cost-sensitive, space-constrained applications where guaranteed performance across variable throughput and minimal external components are critical.
FAQ
What is the maximum guaranteed sample rate for ADC081S021CIMFX/NOPB?
The ADC081S021CIMFX/NOPB is fully specified and guaranteed over a sample rate range of 50 ksps to 200 ksps. At 200 ksps, it maintains all key specifications including ±0.03 LSB typical INL/DNL and 49.6 dB typical SNR. Performance outside this range is not characterized per the datasheet, and operation beyond 200 ksps may degrade linearity or timing margins.
Does ADC081S021CIMFX/NOPB require an external reference voltage?
No, ADC081S021CIMFX/NOPB uses its analog supply voltage (VA) as the reference - the full-scale input range is 0 V to VA. This eliminates the need for an external reference IC or resistor divider, simplifying BOM and layout. The device does not support separate reference pins or external reference inputs.
How does the shutdown mode of ADC081S021CIMFX/NOPB work?
ADC081S021CIMFX/NOPB enters shutdown mode when CS is pulled high between the 2nd and 10th falling edge of SCLK after a conversion starts. In shutdown, analog circuitry powers down, reducing supply current to 500 nA (typical) and power consumption to 2.6 µW at 5.25 V. Recovery requires pulling CS low again, with valid conversion data available after the second cycle.
Is ADC081S021CIMFX/NOPB compatible with standard SPI controllers?
Yes, ADC081S021CIMFX/NOPB is fully compatible with standard SPI master interfaces (including QSPI and MICROWIRE). It uses CS-active-low framing, SCLK-driven readout on falling edges, and outputs 15-bit frames (3 leading zeros + 8 data bits + 4 trailing zeros). No special mode bits or polarity inversion are required - standard Mode 0 (CPOL = 0, CPHA = 0) operation suffices.
What package options are available for ADC081S021CIMFX/NOPB?
ADC081S021CIMFX/NOPB is offered in two surface-mount packages: 6-pin SOT-23 (DBV, 2.50 mm × 2.20 mm) and 6-pin WSON (NGF, 1.60 mm × 2.90 mm). The /NOPB suffix confirms lead-free and RoHS-compliant construction. Both packages share identical pinout and functionality, allowing layout reuse across density-optimized variants.
ADC081S021CIMFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- 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:
- SOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC081S021CIMFX/NOPB FAQ
1.How can I place an order for ADC081S021CIMFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC081S021CIMFX/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 ADC081S021CIMFX/NOPB reliable?
The price and inventory of ADC081S021CIMFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC081S021CIMFX/NOPB is usually 5 days.
3.What payment methods are accepted for ADC081S021CIMFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC081S021CIMFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC081S021CIMFX/NOPB?
ADC081S021CIMFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC081S021CIMFX/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 ADC081S021CIMFX/NOPB?
For technical support, including ADC081S021CIMFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC081S021CIMFX/NOPB requirements.
6.How does Aetrix verify that ADC081S021CIMFX/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC081S021CIMFX/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 ADC081S021CIMFX/NOPB meets industry standards.
7.What is the process for return or replacement of ADC081S021CIMFX/NOPB?
All ADC081S021CIMFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC081S021CIMFX/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 ADC081S021CIMFX/NOPB part is unused and in its original packaging.
Return procedure for ADC081S021CIMFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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