ADC081S051CIMFX/NOPB - 8-Bit 500kSPS SAR ADC, SOT-23-6 | TI
部品番号: ADC081S051CIMFX/NOPB ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.48 | $148.00 |
| 500 | $1.33 | $665.00 |
| 1,000 | $1.18 | $1,180.00 |
| 3,000 | $1.05 | $3,150.00 |
ADC081S051CIMFX/NOPB 概要
What is a SAR ADC? A successive-approximation-register ADC is a converter architecture that performs a binary search through an internal DAC to digitize an analog input one bit per clock cycle, balancing speed, accuracy, and power efficiency. SAR ADCs are the workhorse of medium-speed data acquisition (typically 100 kSPS to 1 MSPS) where pipelined ADCs are overkill and delta-sigma is too slow; they sit within the broader hierarchy of ADC -> data converter -> mixed-signal IC -> semiconductor.
Key features include a single +2.7V to +5.25V supply rail, 1.6 mW typical power consumption at +3.6V and 8.5 mW at +5.25V, and straight-binary serial output. The wide supply range lets designers share the ADC supply with both 3.3V digital and 5V analog rails, simplifying power-tree design. Per the TI datasheet, the converter is fully specified across 200 ksps to 500 ksps - so unlike many competing 8-bit ADCs that are characterized at only one sample rate, AC and DC performance scales predictably across the full operating window.
Typical applications include handheld battery-powered test equipment, sensor signal conditioning front-ends, industrial process monitoring modules, consumer audio level meters, automotive telemetry and infotainment subsystems, and any compact PCB where board area is at a premium. The SOT-23-6 footprint enables placement adjacent to sensors or potentiometers to keep analog traces short, which directly improves SNR by reducing input-capacitance induced errors and ground-loop pickup.
When designing in this part, place a 0.1 uF decoupling capacitor as close as possible to the AVDD pin and keep the analog input trace short and guarded, because SAR ADC linearity degrades with clock-feedthrough and reference noise. For multi-rail designs, route the serial clock and DOUT away from switching regulator inductors to minimize substrate-coupled switching noise. The /CS line allows direct connection to many MCUs without external glue logic.
ドロップイン代替品: ADC081S051CIMFX/NOPB — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
ADC081S021CISD/NOPB
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADC081S051CIMF/NOPB
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADC081S051CIMFX
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADC101S051CIMFX/NOPB
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADC102S051CIMFX/NOPB
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADC081S051CIMFX/NOPB 最大定格＆電気的特性
| 分解能 | 8 bits |
| Number of Input Channels | 1 |
| Architecture | SAR (Successive Approximation Register) |
| Sample Rate Range | 200 kSPS to 500 kSPS |
| Supply Voltage (AVDD/DVDD) | 2.7 V to 5.25 V (single supply) |
| Typical Power Consumption | 1.6 mW at 3.6 V; 8.5 mW at 5.25 V |
| Data Interface | SPI, QSPI, MICROWIRE, DSP-compatible serial |
| Input Type | Single-ended analog input |
| Output Format | Straight binary serial |
| パッケージ | SOT-23-6 (6-pin) |
| 動作温度範囲 | -40 C to +85 C (industrial) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Lead Finish | Matte Tin (lead-free, NOPB suffix) |
ADC081S051CIMFX/NOPB ピン構成
| ピン 1 | AIN — Analog input (single-ended) |
| ピン 2 | GND — Ground (analog and digital common) |
| ピン 3 | /CS — Chip select (active low) |
| ピン 4 | DOUT — Serial data output (SPI MOSI equivalent, MSB first) |
| ピン 5 | SCLK — Serial clock input |
| ピン 6 | AVDD — Analog and digital supply (+2.7V to +5.25V) |
主な用途
ADC081S051CIMFX/NOPB の用途: 8 件s: Handheld Battery-Powered Sensor Reading, Industrial Process Monitoring Module, Automotive Telemetry and Infotainment Subsystem, Consumer Audio Level Meter, IoT Sensor Node, Compact Test and Measurement Front-End, Hobbyist and Maker Embedded Projects, Medical Patient Monitoring Side-Channel.
Handheld Battery-Powered Sensor Reading
The ADC081S051CIMFX/NOPB is ideal for handheld battery-powered sensor reading because its 1.6 mW typical consumption at 3.6V supply supports multi-month battery life on coin-cell or 2xAA cells per the TI datasheet. The SOT-23-6 footprint lets the ADC sit adjacent to thermistor, photocell, or pH probe inputs, shortening analog traces and improving SNR. A 200 kSPS lower-speed duty-cycling mode cuts average current below 100 uA. Pairing it with an MSP430 or similar low-power MCU yields a complete sensor readout node that fits inside a meter-sized enclosure with weeks of runtime.
おすすめ
Industrial Process Monitoring Module
In industrial 4-20 mA loop and 0-10V process monitoring, the ADC081S051CIMFX/NOPB provides 8-bit resolution at 500 kSPS - more than enough to digitize thermocouple, RTD-bridge, and pressure-transducer outputs. Per the TI datasheet, the 2.7V-5.25V supply range accepts 3.3V or 5V industrial backplanes directly. The wide -40 C to +85 C industrial temperature range covers factory floor and outdoor cabinet installations. Mounting the ADC in SOT-23-6 next to the analog input conditioner minimizes ground-loop pickup in long plant wiring runs.
おすすめ
Automotive Telemetry and Infotainment Subsystem
The ADC081S051CIMFX/NOPB suits automotive telemetry subsystems such as cabin climate sensors, infotainment volume-button readout, and battery-monitoring taps because it operates from a single 5V rail shared with many automotive subsystems. The SOT-23-6 footprint is drop-in reflow-compatible with high-volume automotive PCB lines and the -40 C to +85 C range covers cabin and engine-bay-adjacent locations. Per the TI datasheet, the SPI-compatible serial interface connects directly to automotive MCUs without level shifters, simplifying BOM and reducing assembly cost for high-volume vehicle electronics.
おすすめ
Consumer Audio Level Meter
The ADC081S051CIMFX/NOPB is well-suited for consumer audio VU/peak level meters because its 500 kSPS sample rate captures audio-band envelope fluctuations (up to 20 kHz) with 25 us resolution per the TI datasheet. The single +5V supply can power directly from a USB or wall adapter rail. The SOT-23-6 package fits inside compact meter enclosures, mixer-faceplate button readout, or headphone-amp built-in diagnostics. Pairing it with an OLED or LED ladder driver board yields a complete hobbyist-grade or prosumer audio metering module.
おすすめ
IoT Sensor Node
For IoT sensor nodes the ADC081S051CIMFX/NOPB offers an excellent trade-off between power, size, and cost: 1.6 mW at 3.6V supply, SOT-23-6 footprint, and sub-$1 volume pricing make it a strong fit for distributed environmental, agricultural, or smart-home sensor meshes per the TI datasheet. The SPI-compatible serial interface integrates with ESP32, nRF52, or other wireless MCUs over a few GPIO lines. The wide 2.7V-5.25V supply accepts solar-energy-harvesting rails or 2xAA battery packs without additional regulation stages.
おすすめ
Compact Test and Measurement Front-End
In bench-top multimeters, handheld oscilloscope front-ends, and educational electronics kits, the ADC081S051CIMFX/NOPB provides a low-cost, 8-bit 500 kSPS digitizer channel that fits alongside op-amp input stages in a hand-held enclosure per the TI datasheet. The SOT-23-6 footprint enables the ADC to be placed directly at the input probe tip, minimizing analog trace length and reducing EMI pickup. SPI connectivity lets a microcontroller display readings on a small LCD, while the 2.7V-5.25V supply shares rails with USB-powered bench instruments. The /CS pin allows multi-channel expansion by ganging multiple devices on a single SPI bus.
おすすめ
Hobbyist and Maker Embedded Projects
The ADC081S051CIMFX/NOPB is a popular choice for hobbyist and maker-embedded projects because its SOT-23-6 footprint fits standard breakout boards, its SPI-compatible interface works with Arduino and Raspberry Pi Pico directly, and its 2.7V-5.25V supply is forgiving of USB 5V or 3.3V GPIO rails. At sub-$2 unit pricing per the verified distributor data, it is cheaper than most 8-bit ADC breakout modules while offering superior 500 kSPS throughput. Beginners can use the /CS line to chain multiple devices for multi-channel data logging without glue logic, and the straight-binary output simplifies firmware decoding.
おすすめ
Medical Patient Monitoring Side-Channel
In low-side medical patient monitoring side-channels (such as bedside ambient temperature, battery telemetry, or operator-panel button readout, not direct patient contact), the ADC081S051CIMFX/NOPB offers 8-bit resolution at 500 kSPS in a tiny SOT-23-6 footprint per the TI datasheet. The wide -40 C to +85 C range covers hospital, clinic, and home-care environments. The single +5V supply is compatible with medical device backplanes and the SPI-compatible serial interface connects to certified medical MCUs cleanly. For devices that touch patients directly (defibrillators, infusion pumps), use higher-resolution ADCs from the same TI SAR ADC family.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ADC081S051CIMFX/NOPB — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ADC081S021CISD/NOPB | ADC081S051CIMF/NOPB | ADC081S051CIMFX | ADC101S051CIMFX/NOPB | ADC102S051CIMFX/NOPB |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SOT-23-6 | SOT-23-6 - same | SOIC-8 (same die) | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 - same |
| Resolution | 8 bits | 10 bits | 8 bits | 8 bits | 10 bits | 10 bits |
| Sample Rate Range | 200 to 500 kSPS | 200 to 500 kSPS | 200 to 500 kSPS | 200 to 500 kSPS | 200 to 500 kSPS | 200 to 500 kSPS |
| Supply Voltage | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V |
| Number of Input Channels | 1 | 1 | 1 | 1 | 2 | |
| Lead-Free (NOPB) | Yes (matte tin) | Yes | Yes | No | Yes | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
主な差別化要因
- 8-bit resolution at sub-$1.20 volume pricing beats most competing SAR ADCs （vs ADC081S021CISD/NOPB)
- SOT-23-6 footprint saves 70% PCB area vs SOIC-8 （vs ADC081S051CIMF/NOPB)
- NOPB lead-free finish meets RoHS without exemption （vs ADC081S051CIMFX)
設計ノート
Place a 0.1 uF decoupling capacitor as close as possible to the AVDD pin (pin 6) of the ADC081S051CIMFX/NOPB per the TI datasheet, ideally within 1-2 mm of the package pin. For wider temperature or high-noise environments, add a 10 uF bulk capacitor in parallel. The exposed copper under the SOT-23-6 paddle (if present) should connect to a clean analog ground island rather than a digital ground pour to avoid digital switching-noise coupling into the SAR comparator.
Keep the analog input trace (pin 1 AIN) as short as possible and guard it with ground traces on both sides to minimize switching-noise pickup. The SAR ADC's internal track-and-hold can inject charge into high-impedance sources, so add a source-impedance buffer op-amp if the input source impedance exceeds 1 kohm per the TI datasheet's recommended operating conditions. For multi-MCU SPI buses, route SCLK and DOUT away from switching regulator inductors.
Do not exceed the absolute maximum AVDD rating of 6.5V or the ADC081S051CIMFX/NOPB may suffer permanent damage per the TI datasheet. Ensure that the /CS pin is actively driven (not left floating) during power-up transitions to avoid unintended conversions. When using multiple devices on a shared SPI bus, do not chain /CS lines together - each ADC needs its own dedicated chip-select line to avoid bus contention on the DOUT pins.
Estimated: at the worst-case operating conditions of 5.25V supply and 500 kSPS continuous sampling, the ADC081S051CIMFX/NOPB dissipates approximately 8.5 mW per the TI datasheet. With the SOT-23-6 typical theta_JA of approximately 200 C/W, junction temperature rise above ambient is negligible (<2 C) so no heatsinking is required. Designers can ignore thermal management unless the ADC is mounted directly adjacent to a high-power component without thermal isolation.
コンプライアンス情報
RoHS compliant per /NOPB lead-free suffix; not AEC-Q100 qualified (choose automotive-grade alternative for vehicle applications); REACH compliant per TI product page; conflict-mineral reporting compliant per TI policy.
