SI8901D-A01-GS - 10-Bit Isolated Monitoring ADC | Silicon Labs
部品番号: SI8901D-A01-GS ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.1 | $4.10 |
| 10 | $3.69 | $36.90 |
| 100 | $3.28 | $328.00 |
| 500 | $2.93 | $1,465.00 |
| 1,000 | $2.61 | $2,610.00 |
SI8901D-A01-GS 概要
An isolated monitoring ADC is a signal-chain component that performs A/D conversion on one side of an isolation barrier and transmits the digitized result across that barrier to a host microcontroller, thereby breaking ground loops, providing level shifting, and protecting low-voltage control logic from hazardous common-mode voltages. The Si890x family is an ADC front-end whose isolated digital side can be tied directly to a low-voltage MCU without external digital isolators or isolated power on the analog side.
Key features include three analog input channels, 10-bit SAR conversion, internal or external voltage reference selection, selectable gain (1x/0.5x), a master-mode serial interface, UL1577 recognition, VDE/IEC 60747-5-2 certification, CSA component notice 5A approval, IEC 61010 and IEC 60601 compatibility, >60-year rated working voltage life, and a 5 kV RMS isolation rating per UL1577. The wide-body SOIC-16 footprint supports standard soldering and optical inspection processes.
The Si8900/1/2 architecture places the SAR ADC, MUX, gain stage, and reference on the analog (input) side of an on-chip CMOS-based isolation barrier; the digital (output) side exposes an I2C/SMbus-compatible serial port (Si8901), UART (Si8900), or SPI (Si8902) for host access. The 10-bit resolution and sample-rate are sufficient for monitoring currents, voltages, and temperatures in power-conversion stages rather than for high-fidelity audio or instrumentation.
Typical applications include isolated data acquisition front-ends for AC mains monitors, solar inverter string monitors, motor-drive current/voltage sensing, industrial PLC analog input modules, and medical equipment patient-isolation barriers. The device is also useful as a ground-loop eliminator or logic-level translator when a galvanically isolated analog-to-digital link is required.
When designing with this ADC, the bypass capacitor layout on both the analog and digital supply pins is critical because switching currents from the SAR ADC and the isolation barrier can couple across the package if the return paths are not low-inductance. Designers should also note that the -GS suffix denotes a 16-SOIC wide-body tape-and-reel packaging option, the master controller configures gain and reference at startup via the serial port, and the safety certifications (UL1577, VDE/IEC 60747-5-2) are project-critical evidence for medical and industrial safety files.
This page synthesizes distributor pricing, drop-in alternatives from the Si890x family, and practical design notes that are not consolidated in the manufacturer datasheet, helping engineers compare isolation-channel count, package, and qualification level side-by-side.
ドロップイン代替品: SI8901D-A01-GS — 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: SI8901D-A01-GS （同一形状・フットプリント） — 相違点: Package.
クイック比較ツール — 並列比較する代替部品を選択:
SI8901D-A01-GSR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SI8900D-A01-GS
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SI8902D-A01-GS
✅ ドロップイン✓ 在庫あり
$4.1 / 個
データシートを見る →SI8900D-A01-GSR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SI8902D-A01-GSR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SI8901D-A01-GS 最大定格＆電気的特性
| 機能 | Isolated Monitoring ADC |
| 分解能 | 10 bit |
| Number of Analog Inputs | 3 (single-ended, multiplexed) |
| ADC Architecture | SAR (Successive Approximation Register) |
| Programmable Gain | 1x or 0.5x (selectable via serial port) |
| Digital Interface | I2C / SMbus (isolated) |
| 基準電圧 | Internal or external, serial-port selectable |
| Isolation Voltage Rating | 5 kV RMS per UL1577 |
| Working Voltage Life | >60 years at rated working voltage |
| 動作温度範囲 | -40C to +85C (industrial) |
| パッケージ | 16-SOIC, wide-body (300 mil) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Lead-Free | Yes |
| Safety Certifications | UL1577 recognized; VDE/IEC 60747-5-2; CSA Component Notice 5A; IEC 61010; IEC 60601 |
SI8901D-A01-GS ピン構成
| ピン 1 | VDD1 — Analog-side supply (input side of isolation barrier) |
| ピン 2 | AIN1 / Channel 1 — Analog input channel 1 (MUX address 001) |
| ピン 3 | AIN2 / Channel 2 — Analog input channel 2 (MUX address 010) |
| ピン 4 | AIN3 / Channel 3 — Analog input channel 3 (MUX address 100) |
| ピン 5 | REF — Reference voltage (internal buffer output or external reference input) |
| ピン 6 | GND1 — Analog-side ground (input-side of isolation barrier) |
| ピン 7 | GND1 — Analog-side ground (input-side of isolation barrier) |
| ピン 8 | GND1 — Analog-side ground (input-side of isolation barrier) |
| ピン 9 | GND2 — Digital-side ground (output-side of isolation barrier) |
| ピン 10 | GND2 — Digital-side ground (output-side of isolation barrier) |
| ピン 11 | GND2 — Digital-side ground (output-side of isolation barrier) |
| ピン 12 | SDA — I2C/SMbus data (isolated-side, host-facing) |
| ピン 13 | SCL — I2C/SMbus clock (isolated-side, host-facing) |
| ピン 14 | ADDR / nALERT — I2C address select / alert output, configuration dependent |
| ピン 15 | VDD2 — Digital-side supply (host-side of isolation barrier) |
| ピン 16 | VDD2 — Digital-side supply (host-side of isolation barrier) |
主な用途
SI8901D-A01-GS の用途: 6 件s: AC Mains Voltage and Current Monitoring, Solar Inverter String Monitoring, Motor Drive Current and Voltage Sensing, Industrial PLC Analog Input Module, Medical Patient-Isolated Signal Acquisition, Galvanic Isolation for Ground-Loop Elimination.
AC Mains Voltage and Current Monitoring
The SI8901D-A01-GS fits AC mains monitoring front-ends because its 5 kV RMS UL1577 isolation barrier and VDE/IEC 60747-5-2 certification let a low-voltage MCU safely digitize live mains voltages and currents without external digital isolators or a separate isolated ADC. The 3-channel MUX supports a single-phase voltage plus two current shunts in one chip, and the selectable 1x or 0.5x PGA lets the host scale shunt drops to the 10-bit SAR input range. Placed between mains-side sensing resistors and the isolated digital port, it delivers a 10-bit digital representation of AC waveform amplitude and phase for power-quality metering, smart-circuit breakers, and energy-monitoring IoT nodes. Unlike discrete ADC + optocoupler designs, the integrated isolation eliminates LED-aging drift and reduces the BOM to one wide-body SOIC, with the safety certifications already packaged in the datasheet.
おすすめ
Solar Inverter String Monitoring
In solar inverter applications the SI8901D-A01-GS monitors DC string voltages and currents on the high-voltage DC bus while keeping the host MCU on a low-voltage, ground-referenced rail. The 3-channel MUX supports monitoring the panel string voltage plus two current transducers (e.g., Hall-effect or shunt), and the on-chip isolation barrier removes ground-loop errors that plague long string runs. Used as a feedback element to the inverter MPPT controller, the 10-bit SAR resolution is sufficient for string-level imbalance detection; panel-level MPPT loops requiring finer resolution would need an external 12- or 14-bit ADC plus separate isolation. Compared to a discrete MUX + ADC + isolator stack, the Si8901D collapses three ICs into one wide-body SOIC and ships with IEC 61010 qualification evidence that simplifies the inverter safety file.
おすすめ
Motor Drive Current and Voltage Sensing
Variable-frequency motor drives need isolated measurement of DC-bus voltage, phase current, and bus current - exactly the 3-channel MUX footprint of the SI8901D-A01-GS. The galvanic isolation barrier keeps the host MCU off the high-voltage DC bus, the VDE/IEC 60747-5-2 certification supports industrial safety submissions, and the selectable PGA gain (1x or 0.5x) lets one device measure both large bus voltages and small shunt drops. As a feedback element to the motor-control DSP or MCU, the 10-bit SAR converts phase currents at a rate compatible with field-oriented control loops below ~10 kHz electrical; higher-bandwidth current loops require an external sigma-delta ADC. Unlike shunt-amplifier + optocoupler designs that drift with LED aging, the digital isolation keeps the conversion stable over the >60-year rated life at working voltage.
おすすめ
Industrial PLC Analog Input Module
The SI8901D-A01-GS is well suited to industrial PLC analog-input modules that must accept 4-20 mA or 0-10 V field signals while providing 5 kV RMS reinforced isolation between the field side and the backplane logic. The 3-channel MUX supports three field-wired analog points per chip, allowing a single backplane slot to digitize up to three isolated channels; the host selects which channel to convert via the I2C/SMbus-side address. The wide-body 16-SOIC fits the conventional PLC analog-input card layout, and VDE/IEC 60747-5-2 plus IEC 61010 certification simplifies the PLC safety submission package for machinery and process-control cabinets. Compared to a module built from discrete 4-20 mA receivers plus opto-emulated isolation, the Si8901D reduces PCB area, eliminates optocoupler CTR drift, and pre-bundles the safety approvals.
おすすめ
Medical Patient-Isolated Signal Acquisition
In patient-coupled medical equipment such as patient monitors, infusion pumps, and ECG front-ends, the SI8901D-A01-GS provides IEC 60601 recognition and UL1577-recognized 5 kV RMS isolation in a single wide-body SOIC, isolating patient-side analog signals from the host electronics. The 3-channel MUX lets one chip monitor multiple patient-coupled signals (e.g., SpO2, ECG lead, temperature) while keeping the host MCU isolated; the selectable 1x/0.5x PGA tailors the input range to high- or low-amplitude physiological signals. Used as the isolated ADC front-end to a low-voltage host processor, the Si8901D enables 2 MOPP-equivalent isolation paths without external optocouplers. The CSA Component Notice 5A approval and IEC 60601 recognition streamline 60601-1 submissions compared with discrete analog front-ends that need their own isolation engineering.
おすすめ
Galvanic Isolation for Ground-Loop Elimination
Beyond pure ADC use, the SI8901D-A01-GS acts as a level-shifter and ground-loop eliminator by digitizing an analog signal on one ground domain and re-driving it on a different ground domain across the on-chip isolation barrier. Applications include bridging two boards with separate grounds (e.g., a high-side sensor board to a low-side controller), or shifting a 0-5 V signal across a 5 kV common-mode barrier without opto-drift. The 10-bit SAR resolution is acceptable for control-loop and telemetry signals; instrumentation-grade systems needing >14-bit ENOB require a dedicated precision ADC plus external isolation. Using a single 16-SOIC, designers replace a discrete level-shifter plus isolator pair with one certified component.
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: SI8901D-A01-GS — 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 | SI8901D-A01-GSR | SI8900D-A01-GS | SI8902D-A01-GS | SI8900D-A01-GSR | SI8902D-A01-GSR |
|---|---|---|---|---|---|---|
| Brand | Silicon Labs (Skyworks) | Silicon Labs (Skyworks) | Silicon Labs (Skyworks) | Silicon Labs (Skyworks) | Silicon Labs (Skyworks) | Silicon Labs (Skyworks) |
| Package | 16-SOIC wide-body (300 mil) | 16-SOIC wide-body (300 mil) - same | 16-SOIC wide-body (300 mil) - same | 16-SOIC wide-body (300 mil) - same | 16-SOIC wide-body (300 mil) - same | 16-SOIC wide-body (300 mil) - same |
| Isolation Rating | 5 kV RMS (UL1577) | 5 kV RMS (UL1577) | 5 kV RMS (UL1577) | 5 kV RMS (UL1577) | 5 kV RMS (UL1577) | 5 kV RMS (UL1577) |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit |
| Host Serial Interface | I2C / SMbus | I2C / SMbus | UART | SPI | UART | SPI |
| Analog Input Channels | 3 | 3 | 3 | 3 | 3 | 3 |
| VDE/IEC 60747-5-2 Certified | Yes | Yes | Yes | Yes | Yes | Yes |
| IEC 60601 Recognition | Yes | Yes | Yes | Yes | Yes | Yes |
主な差別化要因
- Integrated isolation barrier with safety certifications pre-qualified （vs Discrete ADC + optocoupler isolator stack)
- 3-channel analog MUX on a single isolated ADC （vs Single-channel isolated ADCs (e.g., AMC1100))
- Configurable PGA gain (1x or 0.5x) and reference source via serial port （vs Fixed-gain, fixed-reference isolated ADCs)
設計ノート
Bypass both VDD1 (analog side) and VDD2 (digital side) with 0.1 uF ceramic capacitors placed within 2-3 mm of the respective supply pins, and add a bulk 1 uF to 10 uF cap on each rail. The on-chip isolation barrier carries the SAR ADC's switching currents; a low-impedance return on both grounds is critical to keep the digital-side return noise from coupling into the analog-side reference. The wide-body 16-SOIC exposes multiple GND1 and GND2 pins (3 each side) and VDD2 pins (2) - tie them all to a continuous ground/plane, do not leave any digital-side ground pin floating.
The Si890x isolation barrier survives 5 kV RMS only when the PCB maintains the creepage and clearance ratings that UL1577 and VDE/IEC 60747-5-2 require - the wide-body 300-mil SOIC gives the package the lead spacing needed for reinforced isolation, but the PCB must keep the analog-side and digital-side copper separated by the same clearance (typically 8 mm or more for reinforced 5 kV isolation). Do not run digital-side traces under the analog-side copper or vice versa - this defeats the package's designed clearance and can fail safety testing.
Because the SAR ADC draws a transient current on the analog supply at the start of each conversion, the reference voltage settling time limits the achievable input bandwidth. For applications that need maximum throughput, configure the internal reference buffer for higher drive current (per datasheet register settings) and oversize the REF bypass to 1 uF minimum. For low-frequency monitoring applications (mains, solar inverter strings), the default reference drive is sufficient and a 0.1 uF ceramic on REF is adequate.
Estimated: at typical operating point of VDD1 = 5 V at 15 mA on the analog side and VDD2 = 3.3 V at 5 mA on the digital side, total power dissipation is around 90 mW, so the wide-body 16-SOIC self-heats by less than 4 C on a 1 oz copper, 2-layer board. No thermal relief is needed below 100 mA loads. If the analog side is supplied at higher voltage (e.g., 5 V or 12 V), the integrated LDO inside the Si890x drops excess voltage and dissipates more heat - confirm junction temperature against the 85 C ambient limit for industrial qualification.
コンプライアンス情報
Safety certifications per Si8900/1/2 datasheet Rev 1.03: UL1577 recognized (5 kV RMS, >60-year working voltage life), VDE/IEC 60747-5-2 certified, CSA Component Notice 5A approved, IEC 61010 and IEC 60601 recognized. AEC-Q100 not applicable - this is an industrial/medical isolation component, not an automotive-qualified part.
