ISL26324FVZ - 12-bit 250kSPS 4-ch SAR ADC | Renesas
部品番号: ISL26324FVZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $7.95 | $7.95 |
| 10 | $7.1 | $71.00 |
| 100 | $6.25 | $625.00 |
| 500 | $5.55 | $2,775.00 |
| 1,000 | $4.95 | $4,950.00 |
ISL26324FVZ 概要
A SAR ADC operates by performing a binary search through an internal capacitive DAC, comparing the sampled input against successively switched reference levels on each clock cycle. The architecture delivers zero-latency conversions (a single-cycle latency at the digital interface) and excellent linearity over supply and temperature variations. SAR ADCs sit inside the broader data-converter taxonomy between delta-sigma converters (which prioritize resolution at low speeds) and flash converters (which prioritize speed at low resolution), and are typically the preferred choice for multiplexed mid-speed multi-channel acquisition where channel switching on every cycle is acceptable.
Key specifications include ±1 LSB INL and DNL over temperature, throughput up to 250 kSPS in normal mode, integrated input buffers, an SPI-compatible serial interface, and a TSSOP-16 footprint with -40 °C to +85 °C (or extended automotive) operating range. The combination buffer amplifier allows direct connection to high-impedance sensors and to signal-conditioning circuits without external op-amps. Power consumption scales with the configured sample rate, enabling software-managed trade-offs between speed and dissipation.
Typical applications include multi-channel industrial process instrumentation, factory-automation analog input modules, battery-cell voltage monitoring in battery-management systems, programmable logic controller (PLC) analog front-ends, and isolated data-acquisition front-ends. The wide supply range (2.7 V – 5.25 V) also makes the part suitable for 3.3 V and 5 V digital systems that share a common supply rail with downstream logic.
When designing the analog front-end, keep source impedances low and decouple AVDD and DVDD with 10 µF bulk plus 0.1 µF ceramic capacitors placed within 5 mm of the supply pins. The REF input requires a low-noise, low-drift reference; a single REF decoupled with 10 µF and 0.1 µF on the pin delivers rated performance. Use the chip-select pin for multi-device SPI bus sharing, and follow standard SPI mode-0 or mode-3 timing as documented in the datasheet.
This page synthesizes distributor pricing, drop-in alternatives from the same TSSOP-16 SAR family, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: ISL26324FVZ — 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: ISL26324FVZ （同一形状・フットプリント） — 相違点: Package, Input Type, Resolution, Architecture, Mounting Type.
クイック比較ツール — 並列比較する代替部品を選択:
ISL26324FVZ-T7A
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ISL26324FVZ-T
✅ ドロップイン✓ 在庫あり
$4.18 / 個
データシートを見る →ISL26324FVZ-T7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADS7841PBG4
✅ ドロップイン✓ 在庫あり
$4.12 / 個
データシートを見る →ADS8343EB/2K5G4
✅ ドロップイン✓ 在庫あり
$7.4 / 個
データシートを見る →ADS7822PBG4
✅ ドロップイン✓ 在庫あり
$2.1 / 個
データシートを見る →ISL26324FVZ 最大定格＆電気的特性
| Number of Bits | 12 bit |
| サンプリングレート | 250 kSPS |
| Number of Input Channels | 4 single-ended / 2 differential |
| Architecture | SAR (Successive Approximation Register) |
| Input Type | Single-Ended, Differential |
| Analog Supply Voltage | 2.7 V to 5.25 V |
| Digital Interface | SPI-compatible serial |
| Integral Nonlinearity (INL) | ±1 LSB |
| Differential Nonlinearity (DNL) | ±1 LSB |
| Reference Type | External |
| 動作温度 | -40 °C to +85 °C |
| パッケージ | TSSOP-16 |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
ISL26324FVZ ピン構成
| ピン 1 | AIN0 — Analog input channel 0 |
| ピン 2 | AIN1 — Analog input channel 1 |
| ピン 3 | AIN2 — Analog input channel 2 |
| ピン 4 | AIN3 — Analog input channel 3 |
| ピン 5 | REF — External reference voltage input |
| ピン 6 | GND — Ground |
| ピン 7 | AVDD — Analog supply voltage |
| ピン 8 | CS — Chip select (active low) |
| ピン 9 | SCLK — Serial clock input |
| ピン 10 | DOUT — Serial data output |
| ピン 11 | DIN — Serial data input |
| ピン 12 | EOC — End-of-conversion flag |
| ピン 13 | DVDD — Digital supply voltage |
| ピン 14 | DGND — Digital ground |
| ピン 15 | RESET — Reset input |
| ピン 16 | NC — Not connected (per datasheet) |
主な用途
ISL26324FVZ の用途: 6 件s: Industrial PLC Analog Input Module, Battery Cell Voltage Monitoring (BMS Front-End), Multi-Channel Sensor Data Acquisition Module, Factory Automation Analog Front-End, Test and Measurement Front-End, Programmable Logic Controller (PLC) Analog Front-End.
Industrial PLC Analog Input Module
The ISL26324FVZ is well suited to industrial PLC analog input modules where 4-20 mA current-loop or 0-10 V voltage signals must be digitized across multiple channels at 250 kSPS aggregate throughput. The part's 4 single-ended (or 2 differential) input channels map directly to typical PLC channel counts, while the proprietary input multiplexer with built-in combination buffer amplifier removes the need for external op-amp buffers per channel, reducing BOM cost and PCB area. The 2.7-5.25 V analog supply matches 24 V-isolated PLC backplane rails after regulation, and ±1 LSB INL/DNL over the -40 °C to +85 °C industrial range preserves measurement accuracy across factory-floor temperature swings. The SPI-compatible interface simplifies galvanic isolation with digital isolators such as the Renesas ISL32740E, enabling complete 4 kV isolation between the PLC logic and field wiring.
おすすめ
Battery Cell Voltage Monitoring (BMS Front-End)
The ISL26324FVZ fits battery-management front-ends where individual cell voltages in a multi-cell stack must be sampled sequentially for state-of-charge and state-of-health calculations. The SAR architecture provides zero-latency conversions, allowing the BMS controller to read a channel and act on over-voltage or under-voltage conditions within a single conversion cycle - critical for lithium-ion safety. With 4 single-ended channels, the ISL26324FVZ can monitor a 4-cell Li-ion stack directly, and the 2.7-5.25 V analog supply is compatible with single-cell Li-ion and 12 V lead-acid battery stacks. The combination buffer amplifier handles the high-impedance resistive divider outputs from cell-balancing FETs, eliminating the need for separate op-amp stages between the divider and the ADC input.
おすすめ
Multi-Channel Sensor Data Acquisition Module
The ISL26324FVZ is an excellent fit for sensor data acquisition modules that aggregate thermocouple, RTD, strain-gauge, or pressure-sensor signals into a single digital stream. The 4-channel input mux directly handles multiple transducer outputs, while the built-in combination buffer amplifier drives the high source impedances common in bridge-sensor circuits. The 250 kSPS throughput supports oversampling to improve effective resolution beyond the rated 12 bits, a common technique for weighing scales, force measurement, and precision temperature monitoring. The SPI-compatible serial interface allows multiple ISL26324FVZ devices to share a single SPI bus via chip-select, expanding channel counts to 8, 12, 16, or more for high-density instrumentation.
おすすめ
Factory Automation Analog Front-End
The ISL26324FVZ fits factory automation analog front-ends that digitize actuator feedback, process variable signals, or motor-drive analog outputs. Its 250 kSPS throughput is fast enough to capture step-response dynamics in servo loops and process-control valves, while the 4-channel input mux handles the multiple feedback paths common in motion-control applications. The part operates from a 2.7-5.25 V supply shared with 3.3 V or 5 V digital logic, simplifying factory automation backplane designs that must interface with PLCs, industrial PCs, or motor controllers. The SPI-compatible interface allows direct connection to industrial microcontroller units without glue logic.
おすすめ
Test and Measurement Front-End
The ISL26324FVZ suits test and measurement front-ends where multi-channel signal capture from bench instruments, scope probes, or general-purpose analog inputs is required. Its 12-bit resolution at 250 kSPS allows the part to capture waveforms or transient events across 4 simultaneously-multiplexed channels, while the external reference input accepts precision references for higher accuracy. Combined with an SPI-to-USB bridge IC, the ISL26324FVZ can form the analog input section of a low-cost USB oscilloscope, data logger, or general-purpose data-acquisition card. The TSSOP-16 footprint simplifies integration into compact bench instruments with limited PCB area.
おすすめ
Programmable Logic Controller (PLC) Analog Front-End
The ISL26324FVZ directly serves as the analog front-end for PLC input modules, digitizing analog sensor signals from thermocouples, RTDs, pressure transmitters, and flow meters. The 4-channel input multiplexer matches the typical 4 or 8 channels per PLC module, while the 250 kSPS per-channel throughput supports fast process variable updates required for closed-loop control loops. The ±1 LSB INL ensures measurement accuracy for process-control decisions, and the -40 °C to +85 °C operating range supports PLC cabinet temperature environments. The combination buffer amplifier simplifies PCB layout by eliminating external op-amp channels per input, reducing BOM cost and shrinking the analog-input section of the PLC module.
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: ISL26324FVZ — 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-T7A | ISL26324FVZ-T | ADS7841PBG4 | ADS8343EB/2K5G4 | ADS7822PBG4 |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | TSSOP-16 | TSSOP-16 - same | TSSOP-16 - same | TSSOP-16 - same | TSSOP-16 - same | TSSOP-16 - same |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | |
| Sampling Rate | 250 kSPS | 250 kSPS | 200 kSPS | 100 kSPS | 200 kSPS | |
| Input Channels | 4 SE / 2 DIFF | 4 SE / 2 DIFF | 4 SE / 2 DIFF | 4 SE / 2 DIFF | 1 SE | |
| Architecture | SAR | SAR | SAR | SAR | SAR | |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | |
| Interface | SPI-compatible | SPI-compatible | SPI-compatible | SPI-compatible | SPI-compatible | |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | |
| Unit Price (qty 1) | $7.95 | $7.10 | $5.95 | $6.50 | $3.95 |
主な差別化要因
- Higher throughput than competing 12-bit TSSOP-16 SAR ADCs （vs ADS7841PBG4)
- Integrated combination buffer amplifier （vs ADS8343EB/2K5G4)
- Higher channel count than single-channel TSSOP-16 SAR ADCs （vs ADS7822PBG4)
設計ノート
Estimated: Decouple AVDD with 10 µF bulk plus 0.1 µF ceramic placed within 5 mm of the pin; place the same combination on DVDD for the digital supply rail. Separate analog and digital ground planes with a single-point star connection near the ADC GND pin to minimize digital switching noise coupling into the analog front-end. Power dissipation scales with sample rate - at 250 kSPS the part draws approximately 8-10 mA from AVDD.
Keep analog input traces short and shielded by a continuous analog ground plane to minimize coupled noise. Place the external reference decoupling (10 µF + 0.1 µF) directly at the REF pin; for low-noise applications use a low-drift external reference such as the Renesas ISL21010 or TI REF5025. Route SPI traces (CS, SCLK, DOUT, DIN) perpendicular to analog input traces where they cross to reduce digital-to-analog crosstalk.
Do not exceed 5.25 V on AVDD or DVDD - over-voltage can permanently damage the SAR input multiplexer. Ensure the source impedance on each analog input is below 1 kΩ to allow the internal sampling capacitor to fully settle within the acquisition window. Verify CS, SCLK, and DOUT timing against the datasheet SPI mode diagrams - mode 0 and mode 3 are both supported, but mode mismatches cause corrupted conversion results. Use the RESET pin on power-up to ensure a clean conversion-ready state.
コンプライアンス情報
RoHS and REACH compliant per Renesas product page. Standard -FVZ suffix is not AEC-Q100 qualified; the -T7A automotive-grade variant may be available separately. MSL level not published on datasheet.
