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Texas Instruments ADC081S021CIMF
- Part No.:
- ADC081S021CIMF
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
ADC081S021CIMF.pdf
- Description:
- IC ADC 8BIT SAR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,316
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Product details
Overview
ADC081S021CIMF from Texas Instruments is a single-channel, 8-bit successive-approximation analog-to-digital converter (SAR ADC) with SPI-compatible serial interface, operating at 50–200 ksps sample rates over 2.7–5.25 V supply, featuring ±0.03 LSB typical INL/DNL and 49.6 dB SNR at 100 kHz input. It serves as a low-power signal digitization front-end in battery-powered sensor interfaces and portable instrumentation.
For engineers reviewing the ADC081S021CIMF datasheet, ADC081S021CIMF pinout, ADC081S021CIMF application, or ADC081S021CIMF equivalent, key selection considerations include its guaranteed 50–200 ksps throughput range, 6-pin SOT-23/WSON packaging, shutdown mode reducing power to 2.6 µW, straight-binary output format, and industrial temperature support (−40°C to +85°C).
Technical Context
The ADC081S021CIMF implements a charge-redistribution SAR architecture with integrated track-and-hold, enabling precise sampling across its full specified sample rate range. Its conversion timing is fully synchronous to the external SCLK, with CS-controlled initiation and 16-cycle serial readout including three leading zeros and four trailing zeros.
It operates in two functional modes: normal mode (continuous conversion, 1.3–7.7 mW active power) and shutdown mode (2.6 µW quiescent, microsecond wake-up). The device uses straight-binary coding with LSB = VA/256 and supports SPI, QSPI, MICROWIRE, and common DSP serial protocols without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit with no missing codes - guarantees monotonicity and full code coverage for accurate low-complexity digitization. |
| Sample Rate Range | 50–200 ksps - fully characterized across this range, eliminating need for derating at intermediate speeds. |
| INL / DNL | ±0.03 LSB typical - ensures high linearity for precision measurement applications without calibration. |
| SNR | 49.6 dB typical at 100 kHz input - supports >7.9 ENOB for clean signal capture in noisy environments. |
| Supply Voltage | 2.7 V to 5.25 V - enables direct interfacing with 3.3 V and 5 V logic domains and battery-operated systems. |
| Power (3.6 V) | 1.3 mW typical - allows integration into ultra-low-power embedded nodes where thermal and energy budgets are constrained. |
| Shutdown Power | 2.6 µW at 5.25 V - permits aggressive duty-cycling in intermittent-sampling applications like remote telemetry. |
Pinout & Package
ADC081S021CIMF is packaged in a 6-pin SOT-23 (DBV) package with 2.50 mm × 2.20 mm body size, optimized for space-constrained 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 internal reference, DAC, and comparator. |
| 2 - GND | Analog/digital ground return | Common reference for all analog inputs and digital I/O; requires low-impedance connection to system ground plane. |
| 3 - VIN | Analog input | Single-ended input ranging 0 V to VA; capacitance is 30 pF in track mode, 4 pF in hold mode. |
| 4 - SCLK | Serial clock input | Controls conversion timing and data readout; accepts 1–4 MHz clock; falling edges clock out SDATA bits. |
| 5 - SDATA | Serial data output | Tri-state CMOS output delivering 3 leading zeros + 8 data bits (MSB first) + 4 trailing zeros on SCLK falling edges. |
| 6 - CS | Chip select input | Falling edge initiates conversion and exits tri-state; rising edge places SDATA back in tri-state; controls shutdown entry/exit. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-rate characterization | Full electrical specs guaranteed across 50–200 ksps - eliminates interpolation uncertainty in variable-throughput designs. |
| SPI/QSPI/MICROWIRE compatibility | Direct interface to standard microcontroller peripherals without protocol translation or glue logic. |
| Variable power management | Dynamic switching between 1.3 mW active and 2.6 µW shutdown enables adaptive power scaling per sampling event. |
| Industrial temperature range | Specified operation from −40°C to +85°C ensures reliability in uncontrolled environmental deployments. |
| Low aperture jitter | 30 ps typical - preserves SNR at higher input frequencies by minimizing sampling-time uncertainty. |
Applications
| Portable Data Loggers | Remote Sensor Nodes |
|---|---|
|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and light levels at 100 Hz intervals. IC Role / Device Role / Timing Role: Primary analog front-end digitizing conditioned sensor outputs with minimal power overhead per sample. Use Value: 2.6 µW shutdown power extends multi-year battery life; 50–200 ksps range accommodates burst-mode acquisition during event triggers. |
Use Scenario: Wireless IoT nodes transmitting sensor data via LoRaWAN or NB-IoT with infrequent wake-up cycles. IC Role / Device Role / Timing Role: Low-latency, deterministic ADC initiating conversion on MCU GPIO assertion and completing within 16 SCLK cycles. Use Value: Straight-binary output and SPI compatibility reduce firmware complexity; 3.6-V supply consumption of 1.3 mW aligns with energy harvesting constraints. |
| Industrial Panel Meters | Test & Measurement Accessories |
|
Use Scenario: Compact handheld multimeters requiring stable DC accuracy and AC response up to 100 kHz. IC Role / Device Role / Timing Role: High-linearity digitizer providing calibrated voltage/current readings with <±0.03 LSB error. Use Value: ±0.03 LSB INL/DNL and 49.6 dB SNR enable 7.9-bit effective resolution - sufficient for Class II metering standards. |
Use Scenario: USB-connected oscilloscope probes or signal analyzers needing compact, low-noise analog capture. IC Role / Device Role / Timing Role: Signal conditioning interface converting analog waveforms to digital streams synchronized to host controller clocks. Use Value: 11 MHz full-power bandwidth at 5 V and 30 ps aperture jitter preserve fidelity of fast-rising edges and harmonic content. |
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 |
|---|---|---|---|
| ADS7822ID | 8-bit, 200 ksps, 2.7–5.25 V, but uses pseudo-differential input and requires external reference; no built-in track-and-hold. | Requires additional external components for single-ended use; less suitable for space-constrained layouts. | Choose ADS7822ID only if differential input topology matches sensor configuration and board area permits extra passives. |
| MAX11100EKA+T | 8-bit, 500 ksps, 2.7–3.6 V, SPI-compatible, but lacks shutdown mode and specifies only at 500 ksps - not over a range. | Higher speed but narrower supply range and no low-power sleep state; unsuitable for battery longevity-critical designs. | Prefer MAX11100EKA+T only when fixed 500 ksps throughput is mandatory and 3.3 V rail is guaranteed. |
Compared with ADS7822ID and MAX11100EKA+T, ADC081S021CIMF uniquely delivers guaranteed performance across 50–200 ksps, integrated track-and-hold, true shutdown mode, and dual-package availability - making it optimal for adaptive, low-power, space-sensitive embedded systems.
Availability
ADC081S021CIMF is available at Aetrix Electronics and suitable for portable data loggers, remote sensor nodes, and industrial panel meters requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for ADC081S021CIMF 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 low-power design.
The ADC081S021CIMF belongs to TI's precision SAR ADC portfolio, engineered for cost-sensitive, power-constrained applications where guaranteed multi-rate performance, small footprint, and industrial-grade reliability are essential.
FAQ
What is the maximum guaranteed sample rate for ADC081S021CIMF?
The ADC081S021CIMF is fully specified and guaranteed to operate at up to 200 ksps across its entire temperature and supply voltage range. While the device remains functional beyond this rate, only the 50–200 ksps range is characterized with full electrical specifications including INL, DNL, SNR, and timing parameters - ensuring predictable performance in production designs.
Does ADC081S021CIMF require an external reference voltage?
No, ADC081S021CIMF uses its VA supply pin as the reference source, with LSB = VA/256. It does not require or support an external reference; all analog performance specifications - including INL and SNR - are referenced to VA, simplifying BOM and layout for single-supply systems.
How many clock cycles are needed to read a complete conversion result from ADC081S021CIMF?
ADC081S021CIMF requires exactly 16 SCLK falling edges to output a full conversion result: three leading zero bits, eight data bits (MSB first), and four trailing zero bits. This fixed 16-cycle frame ensures deterministic timing for microcontroller firmware synchronization and eliminates variable latency concerns.
Can ADC081S021CIMF operate from a 3.3-V supply?
Yes, ADC081S021CIMF is fully compatible with 3.3-V operation: its recommended supply range is 2.7 V to 5.25 V, and all specifications - including 1.3 mW typical power consumption, ±0.03 LSB INL/DNL, and 49.6 dB SNR - are validated at 3.6 V (representative of 3.3 V ±10%). It interfaces directly with 3.3-V logic I/O.
What happens to the SDATA pin when CS is high?
When CS is high, the SDATA pin enters high-impedance (tri-state) mode, electrically disconnecting from the bus. This allows multiple ADC081S021CIMF devices to share a common SDATA line in daisy-chain or multiplexed configurations without contention, simplifying multi-channel system design.
ADC081S021CIMF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
ADC081S021CIMF FAQ
1.How can I place an order for ADC081S021CIMF through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC081S021CIMF 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 ADC081S021CIMF reliable?
The price and inventory of ADC081S021CIMF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC081S021CIMF is usually 5 days.
3.What payment methods are accepted for ADC081S021CIMF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC081S021CIMF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC081S021CIMF?
ADC081S021CIMF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC081S021CIMF 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 ADC081S021CIMF?
For technical support, including ADC081S021CIMF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC081S021CIMF requirements.
6.How does Aetrix verify that ADC081S021CIMF is sourced from the original manufacturer or authorized distributors?
All ADC081S021CIMF 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 ADC081S021CIMF meets industry standards.
7.What is the process for return or replacement of ADC081S021CIMF?
All ADC081S021CIMF units undergo pre-shipment inspection (PSI). If there is an issue with ADC081S021CIMF, 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 ADC081S021CIMF part is unused and in its original packaging.
Return procedure for ADC081S021CIMF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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