My Inquiry
My Account
Texas Instruments ADC081S021CISD/NOPB
- Part No.:
- ADC081S021CISD/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
ADC081S021CISD/NOPB.pdf
- Description:
- IC ADC 8BIT SAR 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,430
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADC081S021CISD/NOPB from Texas Instruments is a single-channel, 8-bit successive-approximation analog-to-digital converter (SAR ADC) with SPI-compatible serial interface, specified for 50–200 ksps sample rates, 2.7–5.25 V supply, ±0.03 LSB typical INL/DNL, and 49.6 dB SNR at 100 kHz input. It serves as a low-power signal digitizer in portable instrumentation front-ends.
For engineers reviewing the ADC081S021CISD/NOPB datasheet, ADC081S021CISD/NOPB pinout, ADC081S021CISD/NOPB application, or ADC081S021CISD/NOPB equivalent, key selection considerations include guaranteed performance across variable throughput, WSON/SOT-23 package options, shutdown power down to 2.6 µW, straight-binary output format, and industrial temperature range support (−40°C to +85°C).
Technical Context
The ADC081S021CISD/NOPB implements a charge-redistribution SAR architecture with integrated track-and-hold, enabling precise sampling over its full 50–200 ksps operational range. Its conversion timing is fully synchronized to the external SCLK, with CS-initiated frame control and 16-cycle readout (3 leading zeros + 8 data bits + 4 trailing zeros).
It supports dual functional modes: normal mode for continuous conversion (1.3–7.7 mW), and shutdown mode entered via CS high assertion between SCLK edges 2–10, reducing supply current to 500 nA (static) or 2.6 µW (active shutdown). The device operates with straight-binary coding, LSB = VA/256, and requires no external reference-VA serves as both supply and full-scale reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit with no missing codes-guarantees monotonicity and deterministic code transitions. |
| Sample Rate Range | 50–200 ksps-fully characterized across this range, not just at a single rate. |
| INL / DNL | ±0.03 LSB typical-enables accurate DC measurement and low-distortion AC acquisition. |
| SNR | 49.6 dB typical at 100 kHz input-supports ~8.2 ENOB for medium-fidelity signal capture. |
| Supply Voltage | 2.7 V to 5.25 V-compatible with single Li-ion, 3.3 V, and 5 V systems without level-shifting. |
| Power (3.6 V) | 1.3 mW typical-enables battery operation in portable sensors and remote nodes. |
| Shutdown Power | 2.6 µW at 5.25 V-allows ultra-low quiescent current between sporadic measurements. |
Pinout & Package
ADC081S021CISD/NOPB is available in a 6-pin WSON (NGF) package measuring 1.60 mm × 2.90 mm, optimized for space-constrained PCB layouts. Pin functions are validated per TI SNAS308G Rev G.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VA | Positive analog supply | Single 2.7–5.25 V rail powering analog core and serving as full-scale reference; requires local 1-µF + 0.1-µF bypassing. |
| 2 - GND | Analog/digital ground | Common return for supply and signals; must be connected to low-impedance system ground plane. |
| 3 - VIN | Analog input | Unipolar input range 0 V to VA; 30 pF input capacitance in track mode; 4 pF in hold mode. |
| 4 - SCLK | Serial clock input | Master-controlled clock (1–4 MHz); falling edge triggers conversion steps and data output timing. |
| 5 - SDATA | Serial data output | Tri-state CMOS output delivering 16-bit frame (3+8+4) on SCLK falling edges; high-impedance when CS high. |
| 6 - CS | Chip select | Active-low control initiating conversion and framing; falling edge starts conversion, rising edge terminates output and enables shutdown entry. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-rate characterization | Full electrical specs guaranteed from 50 ksps to 200 ksps-eliminates interpolation uncertainty in variable-throughput designs. |
| SPI/QSPI/MICROWIRE compatibility | Direct interface to common microcontroller peripherals without protocol translation or glue logic. |
| Variable power management | Dynamic trade-off between throughput and power via CS-controlled shutdown-enables adaptive energy use in duty-cycled systems. |
| Internal track-and-hold | Eliminates need for external sample-hold circuitry; aperture jitter limited to 30 ps for stable high-frequency sampling. |
| Industrial temperature range | Specified operation from −40°C to +85°C-validates reliability in uncontrolled environments like field instrumentation or automotive cabins. |
Applications
| Portable Data Loggers | Remote Sensor Nodes |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over days using intermittent wake-up cycles. IC Role / Device Role / Timing Role: Digitizes conditioned analog sensor outputs during brief active windows; enters shutdown between samples to minimize average current. Use Value: 2.6 µW shutdown power extends battery life; 8-bit resolution meets accuracy requirements for Class II industrial sensors. | Use Scenario: Wireless IoT endpoints transmitting analog measurements via LoRaWAN or NB-IoT with infrequent reporting intervals. IC Role / Device Role / Timing Role: ADC front-end acquiring sensor data prior to RF transmission; synchronized to MCU's low-power timer interrupt. Use Value: SPI interface simplifies firmware integration; 50–200 ksps range accommodates burst sampling of transient events without overspec'ing bandwidth. |
| Industrial Panel Meters | Test & Measurement Accessories |
Use Scenario: Compact DIN-rail mounted meters displaying real-time voltage/current readings with local display and RS-485 output. IC Role / Device Role / Timing Role: High-accuracy digitization of isolated analog inputs; operates continuously in normal mode at fixed 100 ksps for stable update rate. Use Value: ±0.03 LSB INL ensures <0.01% linearity error across full scale; 49.6 dB SNR supports clean 3½-digit display resolution. | Use Scenario: Handheld oscilloscope probes or signal analyzers requiring compact, low-noise analog front-ends for benchtop diagnostics. IC Role / Device Role / Timing Role: Signal conditioning stage converting analog waveforms into digital streams for FPGA or ARM-based processing. Use Value: Straight-binary output and deterministic 16-cycle timing simplify FPGA state-machine design; 30 ps aperture jitter preserves time-domain fidelity. |
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, but uses pseudo-differential input and requires external reference; higher typical power (2.5 mW @ 3.3 V). | Requires differential signal conditioning and separate reference-less suitable for single-ended sensor interfaces. | Select ADC081S021CISD/NOPB for simpler single-ended designs with integrated reference; choose ADS7822IDR only if differential input rejection is required. |
| MAX11100ETE+ | 8-bit, 500 ksps, 2.7–3.6 V, SPI-compatible, but lacks guaranteed multi-rate spec and has wider INL (±0.25 LSB max). | Higher speed but looser linearity; not rated for 5.25 V operation-limits compatibility with 5 V microcontrollers. | Choose ADC081S021CISD/NOPB when guaranteed 50–200 ksps performance and tight INL are critical; MAX11100ETE+ suits cost-sensitive, higher-speed, lower-accuracy cases. |
Compared with ADS7822IDR and MAX11100ETE+, ADC081S021CISD/NOPB delivers tighter INL/DNL across its entire sample rate range while supporting full 2.7–5.25 V operation and requiring no external reference-making it optimal for robust, low-component-count analog digitization in portable and industrial systems.
Availability
ADC081S021CISD/NOPB 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 support, and consistent parametric performance across production batches.
Supply support for ADC081S021CISD/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 low-power signal chain solutions.
The ADC081S021CISD/NOPB belongs to TI's precision SAR ADC portfolio designed for space- and power-constrained applications where simplicity, guaranteed multi-rate performance, and industrial-grade reliability are essential-particularly in portable instrumentation and distributed sensing.
FAQ
What is the maximum guaranteed sample rate for ADC081S021CISD/NOPB?
The ADC081S021CISD/NOPB is fully specified and guaranteed for operation up to 200 ksps across its entire temperature and supply voltage range. While functional beyond this rate, only the 50–200 ksps band is characterized for all parameters including INL, DNL, SNR, and timing compliance per TI SNAS308G Rev G.
Does ADC081S021CISD/NOPB require an external voltage reference?
No, ADC081S021CISD/NOPB does not require an external voltage reference. It uses the VA supply pin (2.7–5.25 V) as both power source and full-scale reference, with LSB = VA/256. This eliminates external reference components and simplifies layout for single-supply systems.
How does the shutdown mode of ADC081S021CISD/NOPB work?
ADC081S021CISD/NOPB enters shutdown mode when CS is pulled high between the 2nd and 10th falling edges of SCLK after CS goes low. This disables analog circuitry, reducing supply current to 500 nA (static) or 2.6 µW (with 5.25 V supply). A valid conversion resumes after CS is brought low again and power-up completes in ≤1 µs.
Which packages are offered for ADC081S021CISD/NOPB?
ADC081S021CISD/NOPB is available in two RoHS-compliant, lead-free packages: 6-pin SOT-23 (DBV, 2.50 mm × 2.20 mm) and 6-pin WSON (NGF, 1.60 mm × 2.90 mm). Both share identical pinout and electrical specifications; the WSON variant offers smaller footprint and improved thermal performance (θJA = 99.8°C/W).
Is ADC081S021CISD/NOPB compatible with standard SPI interfaces?
Yes, ADC081S021CISD/NOPB is fully compatible with standard SPI, QSPI, and MICROWIRE interfaces. It uses a 3-wire serial protocol (CS, SCLK, SDATA) with falling-edge clocking, MSB-first straight-binary output, and no requirement for MOSI-making it interoperable with most microcontroller SPI peripherals without configuration changes.
ADC081S021CISD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- 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:
- 6-WSON (2.2x2.5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC081S021CISD/NOPB FAQ
1.How can I place an order for ADC081S021CISD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC081S021CISD/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 ADC081S021CISD/NOPB reliable?
The price and inventory of ADC081S021CISD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC081S021CISD/NOPB is usually 5 days.
3.What payment methods are accepted for ADC081S021CISD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC081S021CISD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC081S021CISD/NOPB?
ADC081S021CISD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC081S021CISD/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 ADC081S021CISD/NOPB?
For technical support, including ADC081S021CISD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC081S021CISD/NOPB requirements.
6.How does Aetrix verify that ADC081S021CISD/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC081S021CISD/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 ADC081S021CISD/NOPB meets industry standards.
7.What is the process for return or replacement of ADC081S021CISD/NOPB?
All ADC081S021CISD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC081S021CISD/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 ADC081S021CISD/NOPB part is unused and in its original packaging.
Return procedure for ADC081S021CISD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADC081S021CISD/NOPB Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
