ADC141S625CIMM - 14-Bit 250kSPS ADC | Texas Instruments
部品番号: ADC141S625CIMM ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.17 | $61.70 |
| 100 | $5.48 | $548.00 |
| 500 | $4.93 | $2,465.00 |
| 1,000 | $4.39 | $4,390.00 |
ADC141S625CIMM 概要
A SAR ADC is a converter architecture that uses a binary-search capacitor array and a comparator to determine the input voltage one bit at a time per conversion cycle. SAR ADCs offer deterministic latency, low power consumption, and excellent DC accuracy compared to pipeline or delta-sigma converters, making them the dominant choice for multiplexed data-acquisition systems, industrial process control, and precision instrumentation requiring 10- to 16-bit resolution at sample rates up to a few MSPS.
Key features include 14-bit resolution with no missing codes, an integrated 4.096V reference, a single 0V-to-VREF analog input, and an SPI-compatible serial interface supporting clock rates up to 20 MHz. Typical INL is rated at +/-0.5 LSB, and the device achieves 71.5 dB SNR and 87 dB SFDR at the rated throughput. Power consumption is approximately 8.7 mW at 250 kSPS from a 5V supply, scaling linearly with sample rate.
The ADC141S625 uses a charge-redistribution capacitor-DAC core with input-track-and-hold, achieving 14-bit resolution in a footprint targeted at multi-channel systems where board area is constrained. Its serial data interface eliminates parallel data-bus routing, simplifying PCB layout for high-density designs.
Typical applications include industrial process control loop monitoring, precision sensor signal conditioning, optical module power monitoring, multi-channel instrumentation front-ends, and battery-powered portable measurement equipment. The integrated reference minimizes external BOM, while the MSOP-8 footprint allows dense 4- or 8-channel boards.
When designing with this converter, decouple AVDD with a 10 uF tantalum and 0.1 uF ceramic capacitor as close to the pin as possible. Drive CS low only when reading valid conversion data; back-to-back CS pulses during conversion may inject kickback noise into the input sample-and-hold.
ドロップイン代替品: ADC141S625CIMM — 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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ADC141S625CIMM （同一形状・フットプリント） — 相違点: Package, Resolution, RoHS Status, Input Type, Architecture.
クイック比較ツール — 並列比較する代替部品を選択:
ADC141S625CIMM/NOPB
✅ ドロップイン✓ 在庫あり
$2.49 / 個
データシートを見る →ADC141S625CIMMX
✅ ドロップイン✓ 在庫あり
$1.95 / 個
データシートを見る →ADC141S625CIMM/NOPB-TR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADC122S101CIMM
✅ ドロップイン✓ 在庫あり
$1.96 / 個
データシートを見る →ADC122S051CIMMX
✅ ドロップイン✓ 在庫あり
$2.99 / 個
データシートを見る →ADC102S101CIMM
✅ ドロップイン✓ 在庫あり
$1.55 / 個
データシートを見る →ADC141S625CIMM 最大定格＆電気的特性
| 分解能 | 14 bits |
| Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 1 |
| Sample Rate (max) | 250 kSPS |
| Analog Input Range | 0 V to VREF |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Digital Supply Voltage | 1.6 V to 5.25 V |
| Reference Type | Internal (4.096 V) |
| Signal-to-Noise Ratio (SNR) | 71.5 dB |
| Spurious-Free Dynamic Range (SFDR) | 87 dB |
| Power Consumption | 8.7 mW at 250 kSPS (5 V) |
| Digital Interface | SPI / QSPI / MICROWIRE / DSP-compatible |
| 動作温度 | -40 C to +85 C |
| パッケージ | 8-VSSOP (Mini-SOIC, MSOP) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant (per /NOPB variant) |
ADC141S625CIMM ピン構成
| ピン 1 | AVDD — Analog supply voltage input (4.75V to 5.25V) |
| ピン 2 | IN+ — Non-inverting analog input (single-ended, 0V to VREF) |
| ピン 3 | AGND — Analog ground |
| ピン 4 | VREF / REFCAP — Internal reference bypass / external reference input |
| ピン 5 | CS — Chip-select (active low) for SPI interface |
| ピン 6 | SCLK — Serial clock input for SPI interface |
| ピン 7 | DOUT/DRDY — Serial data output, also serves as data-ready indicator |
| ピン 8 | DVDD — Digital supply voltage input (1.6V to 5.25V) |
主な用途
ADC141S625CIMM の用途: 6 件s: Industrial Process Control Monitoring, Precision Sensor Signal Conditioning, Optical Module Power Monitoring, Multi-Channel Data Acquisition Front-Ends, Portable Measurement Equipment, Battery Management & Monitoring Systems.
Industrial Process Control Monitoring
In industrial process-control PLCs and 4-20 mA loop monitors, the ADC141S625CIMM digitizes low-frequency transducer signals at up to 250 kSPS aggregate, easily handling 4-/8-channel multiplexed loops at 30 kSPS each. The integrated 4.096 V reference and 14-bit no-missing-codes performance guarantee +/-0.6 mV absolute measurement uncertainty over the 0-5V sensor range, sufficient for 0.1% full-scale process calibration. Its SPI-compatible serial interface shares SCLK/DOUT across multiple ADC chips via per-device CS lines, simplifying PCB layout in compact PLC backplanes where board area is constrained to the MSOP-8 footprint.
おすすめ
Precision Sensor Signal Conditioning
Precision sensor front-ends for strain-gauge bridges, RTD conditioning boards, and thermocouple cold-junction compensation modules benefit from the ADC141S625CIMM's 14-bit DC linearity and SAR architecture. The deterministic per-conversion latency simplifies digital post-filtering because there is no pipeline delay to track. The integrated 4.096 V reference eliminates a discrete reference component, reducing BOM count by one IC and easing thermal management on dense 4-channel sensor boards.
おすすめ
Optical Module Power Monitoring
SFP/QSFP optical transceivers and tunable laser modules require compact, low-power ADCs to monitor transmit-power and bias-current photodiode signals at 1-10 kHz rates. The ADC141S625CIMM's 8-VSSOP footprint fits inside a stacked optical-engine PCB, and its 8.7 mW power consumption keeps module thermal budgets within the 1.5 W SFP envelope. The SAR architecture's excellent DC linearity ensures laser APC loop stability, while the SPI interface shares the module's existing I2C/SPI management bus through simple chip-select gating.
おすすめ
Multi-Channel Data Acquisition Front-Ends
Modular data-acquisition cards with 8 or 16 analog input channels use one ADC141S625CIMM per channel in a time-multiplexed 8:1 configuration. At 250 kSPS aggregate, each converter handles 30 kSPS per channel - more than sufficient for vibration, audio-band, and thermocouple sampling. The 8-VSSOP package allows 4 converters per square inch of PCB, and per-channel simultaneous-sampling variants (e.g., ADS1278) can be added later without board rework if higher bandwidth is needed. Firmware uses standard SPI routines to read sequential channel data through a chip-select decoder.
おすすめ
Portable Measurement Equipment
Handheld digital multimeters, bench-top panel meters, and battery-powered calibration instruments benefit from the ADC141S625CIMM's scalable power consumption that decreases linearly with reduced sample rate via its power-down command. At 1 kSPS in standby, the converter typically draws under 1 mW, extending battery life significantly. The 14-bit resolution provides 0.006% full-scale count resolution, more than adequate for 4-1/2 digit DMM display precision. The MSOP-8 footprint keeps PCB size small enough for handheld enclosures.
おすすめ
Battery Management & Monitoring Systems
In Li-ion battery-pack monitoring circuits for e-mobility and backup-power systems, the ADC141S625CIMM measures individual cell voltages at high accuracy. Up to 12 cells in series can share a single converter through a high-voltage MUX, achieving 250 kSPS aggregate (about 20 kSPS per cell) - ideal for cell-balancing feedback loops and State-of-Charge calculations. The integrated reference and 5V analog supply simplify isolation barrier design, while the SPI interface is compatible with the BMS controller's existing peripheral bus.
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: ADC141S625CIMM — 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 | ADC141S625CIMM/NOPB | ADC141S625CIMMX | ADC122S101CIMM | ADC122S051CIMMX | ADC102S101CIMM |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-VSSOP (MSOP) | 8-VSSOP - same | 8-VSSOP - same | 8-VSSOP - same | 8-VSSOP - same | 8-VSSOP - same |
| Resolution | 14 bits | 14 bits | 14 bits | 12 bits | 12 bits | 10 bits |
| Sample Rate (max) | 250 kSPS | 250 kSPS | 250 kSPS | 1 MSPS | 500 kSPS | 1 MSPS |
| Input Channels | 1 | 1 | 1 | 1 | 1 | 1 |
| Analog Supply Voltage | 4.75V to 5.25V | 4.75V to 5.25V | 4.75V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V |
| Power Consumption (typ) | 8.7 mW at 250 kSPS | 8.7 mW at 250 kSPS | 8.7 mW at 250 kSPS | 1.5 mW at 1 MSPS | 1.0 mW at 500 kSPS | 1.5 mW at 1 MSPS |
| Reference Type | Internal (4.096V) | Internal (4.096V) | Internal (4.096V) | External (VDD-based) | External (VDD-based) | External (VDD-based) |
| RoHS Compliance | Compliant (/NOPB variant only) | Compliant | Compliant | Compliant | Compliant | Compliant |
主な差別化要因
- Integrated 4.096V reference （vs ADC122S101CIMM)
- 14-bit resolution at 250 kSPS （vs ADC102S101CIMM)
- Single 5V analog supply operation （vs ADC122S101CIMM)
設計ノート
AVDD and DVDD should be powered from separate, well-decoupled rails. Place a 10 uF tantalum bulk capacitor and a 0.1 uF ceramic capacitor as close as possible to each supply pin. For best noise rejection, star-ground AVDD and DVDD at the regulator output rather than at the device pin. Power-supply rejection degrades above 100 kHz, so additional LC filtering on AVDD is recommended if the source is a switching regulator.
The REFCAP pin requires a low-ESR ceramic bypass capacitor of at least 1 uF to maintain reference stability; 10 uF X5R is recommended for production layouts. Route the REFCAP trace directly to AGND with no shared power-plane currents. Use a guard ring around the analog input pin (IN+) connected to AGND to minimize leakage-induced offset errors; leakage currents above 50 pA degrade 14-bit performance at the 5V full-scale range.
Estimated based on typical SAR ADC behavior: do not toggle CS during an active conversion - the input kickback can inject up to 1 LSB of offset. Wait for the DRDY falling edge (DOUT goes low) before initiating SCLK to read conversion data. The first conversion after power-up or after exiting power-down mode is internally discarded; ignore the first DRDY after power-up to avoid reading a stale value from the reference settling transient.
Keep digital return currents (DGND) physically separated from analog return currents (AGND); join them at a single point near the converter's AGND pin to avoid digital-to-analog ground bounce. The 8-VSSOP exposed pad (where present) should be soldered to AGND plane for thermal dissipation. Trace impedance control is not critical for SAR ADCs, but maintain 50-ohm series termination on SCLK if trace length exceeds 50 mm.
コンプライアンス情報
RoHS compliance verified for the /NOPB variant per LCSC and DigiKey product listings. AEC-Q100 qualification status not declared by TI for this part family - not recommended for automotive safety-critical applications.
