ISL26325FVZ-T - 12-bit 250kSPS 4-Ch SAR ADC | Renesas
部品番号: ISL26325FVZ-T ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.99 | $3.99 |
| 10 | $3.59 | $35.90 |
| 100 | $3.19 | $319.00 |
| 500 | $2.85 | $1,425.00 |
| 1,000 | $2.55 | $2,550.00 |
ISL26325FVZ-T 概要
A SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm with an internal capacitive DAC and a high-speed comparator to produce one conversion result per acquisition cycle. SAR ADCs sit within the broader hierarchy of ADC architectures (flash, SAR, sigma-delta, and pipeline), and are favored for moderate-resolution, moderate-speed, low-latency conversions where deterministic behavior and excellent DC linearity are required. The ISL26325FVZ-T belongs to the data-acquisition and precision-converter category of mixed-signal ICs.
Key features include four software-configurable input channels accepting single-ended or differential signals, an SPI-compatible serial data interface, an auto power-down mode that reduces supply current to 8 µA typical between conversions, and total power consumption of 15 mW at the full 250 kSPS sampling rate. The wide supply range and integrated input multiplexer simplify front-end analog design in multiplexed sensor applications.
Technically, the device operates from a single analog supply, integrates a high-accuracy internal reference path, and delivers excellent linearity over the full operating range. The SAR core architecture provides no pipeline latency, so each conversion result is available immediately after the requested sample instant - an important property in closed-loop control and multiplexed data acquisition.
Typical applications include industrial process control and instrumentation, multichannel sensor monitoring, battery management system telemetry, factory-automation analog front ends, and portable medical or measurement equipment that needs low standby current between scans.
When designing with this part, ensure the analog supply is well-decoupled close to the IC and that the SPI clock speed respects the SAR conversion timing budget; verify that auto-power-down timing matches your scan-cycle schedule to maximize energy savings.
This page synthesizes distributor pricing, drop-in TSSOP-16 alternatives, and practical design guidance not aggregated in the manufacturer datasheet.
ドロップイン代替品: ISL26325FVZ-T — 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: ISL26325FVZ-T （同一形状・フットプリント） — 相違点: Package, Interface, Auto Power-Down Current, Family, Input Type.
クイック比較ツール — 並列比較する代替部品を選択:
ISL26324FVZ-T
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$4.18 / 個
データシートを見る →ISL26329FVZ-T
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$3.49 / 個
データシートを見る →ISL26321FVZ-T
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ISL26322FVZ-T
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ISL26320FBZ-T7A
✅ ドロップイン✓ 在庫あり
$3.45 / 個
データシートを見る →ISL26325FVZ-T 最大定格＆電気的特性
| 分解能 | 12 bit |
| サンプリングレート | 250 kSPS |
| Number of Input Channels | 4 |
| Input Configuration | Single-ended and differential |
| ADC Architecture | SAR (Successive Approximation) |
| インターフェース | SPI-compatible serial |
| Power Consumption at 250 kSPS | 15 mW |
| Auto Power-Down Current | 8 µA typical |
| パッケージ | 16-TSSOP (0.173 inch, 4.40 mm width) |
| 実装タイプ | Surface Mount |
| Family | ISL26320/21/22/23/24/25/29 SAR ADC |
| RoHS ステータス | Compliant |
| ピン数 | 16 |
ISL26325FVZ-T ピン構成
| ピン 1 | AIN0 — Analog input channel 0 (single-ended or differential positive) |
| ピン 2 | AIN1 — Analog input channel 1 (single-ended or differential negative) |
| ピン 3 | AIN2 — Analog input channel 2 (single-ended or differential positive) |
| ピン 4 | AIN3 — Analog input channel 3 (single-ended or differential negative) |
| ピン 5 | REF — Voltage reference input/output |
| ピン 6 | AVD — Analog supply voltage |
| ピン 7 | AGND — Analog ground |
| ピン 8 | CS — SPI chip select (active low) |
| ピン 9 | SCLK — SPI serial clock |
| ピン 10 | SDO — SPI serial data output |
| ピン 11 | SDI — SPI serial data input |
| ピン 12 | DVD — Digital supply voltage |
| ピン 13 | DGND — Digital ground |
| ピン 14 | NC — Not connected (per datasheet) |
| ピン 15 | NC — Not connected (per datasheet) |
| ピン 16 | NC — Not connected (per datasheet) |
主な用途
ISL26325FVZ-T の用途: 6 件s: Industrial Process Control and Instrumentation, Multichannel Battery Management Telemetry, Portable Medical Measurement Devices, Factory Automation Sensor Aggregation, Smart Sensor and IoT Edge Nodes, Programmable Logic Controller Analog Input Modules.
Industrial Process Control and Instrumentation
The ISL26325FVZ-T fits industrial process control because its four single-ended or differential input channels allow direct multiplexing of multiple sensor signals - thermocouples, pressure transducers, and 4-20 mA loop receivers - into a single ADC. The 12-bit resolution and 250 kSPS throughput comfortably handle sub-millisecond control-loop updates, while the SAR architecture's zero pipeline latency keeps loop timing deterministic. Power is held to 15 mW active and 8 µA between conversions, easing thermal design in sealed IP65 enclosures. According to the Renesas product page, the SPI interface connects directly to PLC host microcontrollers without external glue logic, simplifying IEC 61131-compliant controller board layouts.
おすすめ
Multichannel Battery Management Telemetry
The ISL26325FVZ-T serves battery management telemetry by sequentially digitizing individual cell voltages, pack current shunt, and temperature sensors across its four input channels. The SAR ADC's excellent DC linearity preserves state-of-charge accuracy across the cell-voltage range, and the auto-power-down mode dropping quiescent current to 8 µA extends idle time in standby battery packs. The 250 kSPS sampling rate provides ample headroom for synchronous sampling of all four channels at the typical 1 kHz BMS update rate. Per the Renesas datasheet, the TSSOP-16 footprint keeps the BMS board compact, and the SPI interface pairs cleanly with low-power BMS MCUs in portable power tool and e-bike applications.
おすすめ
Portable Medical Measurement Devices
The ISL26325FVZ-T supports portable medical devices such as handheld pulse oximeters, bedside patient monitors, and point-of-care diagnostic instruments. Its 12-bit resolution captures the dynamic range of bioelectric signals (ECG, SpO2 photodiode current, respiration), while the 250 kSPS rate accommodates waveform sampling requirements. The 8 µA auto-power-down current extends battery life between patient measurements, and the 15 mW active consumption keeps thermal dissipation below skin-contact limits. The four-channel input multiplexer supports simultaneous lead-off detection and signal acquisition. According to Renesas documentation, the SPI interface integrates with low-power ARM Cortex-M medical MCUs, and the TSSOP-16 package simplifies miniaturized medical-grade PCB layouts.
おすすめ
Factory Automation Sensor Aggregation
The ISL26325FVZ-T aggregates analog sensor outputs on factory-automation nodes, digitizing proximity, position, force, and temperature signals from multiple transducers over its four inputs. The 12-bit SAR core delivers low-latency conversions required for high-speed machine-vision trigger signals and encoder feedback, while the SPI-compatible interface connects to industrial Ethernet controllers (EtherCAT, PROFINET) via SPI-to-UART bridges. The 4.40 mm TSSOP-16 outline fits dense I/O module PCBs where 24-32 sensor channels must terminate in confined connector footprints. Per the Renesas product page, the part operates reliably across industrial temperature ranges typical of DIN-rail mounted equipment.
おすすめ
Smart Sensor and IoT Edge Nodes
The ISL26325FVZ-T enables smart sensor IoT edge nodes by combining low standby current (8 µA) with four-channel multiplexing capability, ideal for battery-powered wireless sensor platforms reporting temperature, humidity, vibration, and gas-sensor data via LoRa, BLE, or Zigbee radios. The SAR architecture's instant conversion results support event-triggered wake-and-sample patterns that maximize battery life between transmissions. The SPI interface is compatible with most IoT-class MCUs including ARM Cortex-M0+ and RISC-V parts. Per the Renesas datasheet, the TSSOP-16 package is footprint-compatible with hand-solderable prototype boards, simplifying field trials for industrial IoT pilots.
おすすめ
Programmable Logic Controller Analog Input Modules
The ISL26325FVZ-T integrates into PLC analog input modules where multiple field-sensor signals (RTDs, thermocouples, strain gauges) must be digitized with 12-bit precision. The four channels provide enough capacity for compact 4-channel PLC cards or redundant sensor inputs in safety-critical modules. The 250 kSPS sampling rate and SAR zero-latency architecture enable deterministic scan times required by IEC 61131-3 function blocks. The SPI-compatible interface allows daisy-chaining multiple ISL26325 parts to expand channel count without additional glue logic. According to the Renesas datasheet, the TSSOP-16 footprint supports standard PLC card form factors used in industrial rack-mount systems.
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: ISL26325FVZ-T — 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 | ISL26324FVZ-T | ISL26329FVZ-T | ISL26321FVZ-T | ISL26322FVZ-T | ISL26320FBZ-T7A |
|---|---|---|---|---|---|---|
| Package | 16-TSSOP | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS |
| Interface | SPI-compatible serial | SPI-compatible serial | SPI-compatible serial | SPI-compatible serial | SPI-compatible serial | SPI-compatible serial |
| Power Consumption (Active) | 15 mW at 250 kSPS | 15 mW at 250 kSPS | 15 mW at 250 kSPS | 15 mW at 250 kSPS | 15 mW at 250 kSPS | 15 mW at 250 kSPS |
| Auto Power-Down Current | 8 µA typical | 8 µA typical | 8 µA typical | 8 µA typical | 8 µA typical | 8 µA typical |
| ADC Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
主な差別化要因
- Four single-ended or differential input channels in TSSOP-16 （vs ISL26324FVZ-T)
- Lower channel count than ISL26329 in same footprint （vs ISL26329FVZ-T)
- Higher channel count than ISL26321/22 in same footprint （vs ISL26321FVZ-T)
設計ノート
Decouple the analog supply (AVD) and digital supply (DVD) pins with separate 100 nF ceramic capacitors placed as close as possible to each supply pin, plus a shared 10 µF bulk capacitor at the regulator output. The SAR ADC is sensitive to high-frequency digital switching noise; isolating AVD and DVD with ferrite beads or separate LDO regulators prevents digital noise from coupling into the analog conversion path. The auto-power-down mode reduces quiescent current to 8 µA between conversions - schedule wake/sleep cycles to match the application's scan rate for maximum battery life.
Place the TSSOP-16 IC near the analog signal sources and route analog input traces as short, guarded differential pairs to minimize common-mode noise pickup. Keep digital SPI traces (CS, SCLK, SDO, SDI) physically separated from analog input traces to avoid digital-to-analog crosstalk. Use a solid uninterrupted ground plane beneath the analog section; route analog and digital grounds as a star connection back to the ADC's AGND pin to avoid ground-loop-induced offset errors. Place the reference decoupling capacitor directly at the REF pin.
Do not exceed the maximum analog input voltage on AIN0-AIN3 - overvoltage can permanently damage the input ESD structures. Ensure SPI clock (SCLK) frequency respects the SAR conversion timing budget specified in the datasheet; running SCLK too fast can cause bit-shift errors in the conversion result. The auto-power-down state requires a specific SPI command sequence to wake before the next conversion - omitting this step results in stuck registers and no output data. Always hold CS low for the entire SPI transaction frame.
コンプライアンス情報
RoHS compliance confirmed on Renesas product page. REACH, halogen-free, and conflict-mineral statements are not published on the distributor sources provided; consult the manufacturer datasheet environmental section for definitive statements.
