ISL26314FVZ-T - 12-bit 125kSPS SAR ADC, 4-Ch Diff | Renesas
料号： ISL26314FVZ-T ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.72 | $5.72 |
| 10 | $5.15 | $51.50 |
| 100 | $4.42 | $442.00 |
| 500 | $3.86 | $1,930.00 |
| 1,000 | $3.31 | $3,310.00 |
ISL26314FVZ-T 概述
An SAR ADC is a successive-approximation-register analog-to-digital converter that uses a binary-search algorithm and an internal capacitive DAC to digitize an analog input in N conversion cycles for N-bit resolution. SAR ADCs are valued in the data-acquisition hierarchy for their deterministic latency, lack of pipeline delay, and low power consumption compared to pipelined ADCs, making them well suited to multiplexed multi-channel systems, industrial control loops, and battery-powered instrumentation.
Key features of the ISL26314FVZ-T include 12-bit resolution with no missing codes, 125 kSPS maximum sampling rate, single-ended and differential input configurations, an integrated input multiplexer, an internal reference / buffer, and low power consumption suitable for portable applications. The part supports 2-channel single-ended or 1-channel differential input operation with SPI/QSPI/MICROWIRE-compatible serial interface, and operates across an extended industrial temperature range. Compared with rival 12-bit SAR ADCs, the integrated front-end buffer minimizes external op-amp stages and reduces BOM count.
Internally, the ISL26314FVZ-T uses a charge-redistribution DAC architecture with a sample-and-hold front-end and on-chip digital correction. The input buffer amplifier provides high-impedance, low-leakage signal acquisition across the full analog input range, and the digital interface is designed for low-EMI operation in noise-sensitive systems. The architecture delivers excellent INL/DNL performance while consuming minimal supply current at lower throughput rates.
Typical applications include industrial process control and data acquisition, portable and battery-powered instrumentation, multi-channel sensor monitoring, and medical instrumentation. The wide input range and integrated input mux make it particularly well-suited to multi-sensor systems requiring sequential channel scanning with consistent conversion accuracy.
When designing with this part, ensure that the analog and digital ground returns are joined at a single star point beneath the ADC to minimize digital switching noise coupling into the analog input. Use a low-ESR 10 µF bypass capacitor close to the supply pin in parallel with a 0.1 µF ceramic for high-frequency decoupling. Verify SPI timing against your controller's worst-case SCLK rise/fall times before committing to layout.
This page synthesizes distributor pricing, drop-in alternatives from the same SAR-ADC family, and practical design notes not assembled in any single manufacturer document.
直接替换替代料： ISL26314FVZ-T ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ISL26314FVZ-T （相同外形与封装尺寸） ——差异在于 Package, Input Type, Number of Input Channels, Operating Temperature Range, Interface.
快速对比工具——选择替代料号进行并排对比：
ISL26312FVZ-T
✅ 直接替换✓ 有现货
$1.02 / 个
查看数据手册 →ISL26311FBZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.3 / 个
查看数据手册 →ISL26314FVZ
✅ 直接替换✓ 有现货
$3.55 / 个
查看数据手册 →ISL26315FVZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.85 / 个
查看数据手册 →ADS131A04IPBS
✅ 直接替换📋 参考替代料（不在目录中）
ISL26314FVZ-T 最大额定值与电气特性
| 分辨率 | 12 bits |
| Sampling Rate (max) | 125 kSPS |
| Architecture | SAR (Successive Approximation) |
| Number of Input Channels | 4 (single-ended) / 2 (differential) |
| Input Type | Single-ended and Differential |
| Data Interface | SPI / QSPI / MICROWIRE compatible |
| Input Multiplexer | Integrated (proprietary) |
| Input Buffer Amplifier | Integrated |
| 封装 | TSSOP-16 (FVZ) |
| 安装类型 | Surface Mount |
| Lead Free Status | Lead Free |
| RoHS 状态 | Compliant |
ISL26314FVZ-T 引脚配置
| 引脚 1 | AIN0 — Analog input channel 0 |
| 引脚 2 | AIN1 — Analog input channel 1 |
| 引脚 3 | AIN2 — Analog input channel 2 |
| 引脚 4 | AIN3 — Analog input channel 3 |
| 引脚 5 | GND — Analog ground |
| 引脚 6 | REF — Voltage reference input/output |
| 引脚 7 | AVD — Analog supply voltage |
| 引脚 8 | DVD — Digital supply voltage |
| 引脚 9 | DGND — Digital ground |
| 引脚 10 | CS — Chip select (active low) |
| 引脚 11 | SCLK — Serial clock input |
| 引脚 12 | SDOUTA — Serial data output A |
| 引脚 13 | SDOUT — Serial data output |
| 引脚 14 | NC — Not connected (per datasheet) |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | NC — Not connected (per datasheet) |
典型应用
ISL26314FVZ-T 适用于 6 应用s: Industrial Process Control & Data Acquisition, Portable Battery-Powered Instrumentation, Multi-Channel Sensor Monitoring, Medical Instrumentation, Power & Energy Monitoring, Test & Measurement Equipment.
Industrial Process Control & Data Acquisition
The ISL26314FVZ-T fits industrial process-control DAQ boards because its 4 single-ended / 2 differential input channels and integrated input buffer amplifier simplify multi-sensor scanning with no external op-amp stages. At 125 kSPS throughput and 12-bit resolution, the converter digitizes 4-20 mA loop signals, thermocouple/bridge outputs, and process variable sensors with adequate bandwidth for PID loop update rates. The TSSOP-16 footprint and SPI interface drop directly onto standard isolated-DAQ front ends, reducing BOM count and lowering per-channel cost compared to discrete ADC + mux solutions.
推荐
Portable Battery-Powered Instrumentation
The ISL26314FVZ-T suits portable and handheld instruments because the SAR core draws low quiescent current and the integrated input buffer eliminates external op-amp quiescent overhead, extending battery runtime. Its 125 kSPS rate supports fast enough conversion for handheld multimeters, field data loggers, and portable medical monitors. The TSSOP-16 small outline and SPI interface ease layout in compact handheld enclosures, and the lead-free RoHS-compliant package meets global environmental requirements for consumer-grade portable products.
推荐
Multi-Channel Sensor Monitoring
The ISL26314FVZ-T integrates a proprietary input multiplexer with 4 single-ended channels, making it ideal for multi-sensor monitoring boards such as environmental sensor arrays, HVAC control units, and equipment-health monitoring modules. The on-chip input buffer amplifier reduces the drive requirement on each sensor, allowing direct connection to high-impedance transducers without external buffering. At 125 kSPS aggregate, sequential channel scanning completes in tens of microseconds per channel - sufficient for thermal monitoring, gas sensing, and pressure transducer arrays.
推荐
Medical Instrumentation
The ISL26314FVZ-T serves medical instrumentation front ends where multi-channel analog signal acquisition with deterministic latency is required, including patient monitors and benchtop diagnostic analyzers. SAR architecture provides no-pipeline-delay conversions, simplifying synchronization of multiple channel readings in safety-critical loops. The integrated input buffer reduces analog front-end complexity, supporting compliance-driven design reviews where minimizing component count improves reliability assessment. The TSSOP-16 footprint and SPI interface ease integration into compact medical device PCBs.
推荐
Power & Energy Monitoring
The ISL26314FVZ-T fits multi-phase power and energy monitoring systems where simultaneous sampling across current and voltage channels is required. At 125 kSPS, the converter captures harmonic content up to the 31st harmonic on 50/60 Hz mains signals with comfortable margin. The 4-channel input multiplexer accommodates three-phase plus neutral voltage and current channels in compact metering designs. The integrated buffer reduces the burden on current-shunt amplifiers, lowering total error in class-0.5 metering paths.
推荐
Test & Measurement Equipment
The ISL26314FVZ-T supports benchtop test equipment and rack-mounted measurement modules where a compact, multi-channel SAR ADC is needed for digitizing sensor outputs and analog test points. The 125 kSPS sampling rate covers most oscilloscope-style acquisition and transient capture needs up to the audio band. SPI interface simplifies integration with FPGA-based timing engines, and the integrated input buffer allows direct connection to high-impedance scope probes and signal conditioning outputs without external amplifiers.
推荐
推荐产品汇总
工程参考数据： ISL26314FVZ-T ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ISL26312FVZ-T | ISL26314FVZ | ISL26315FVZ | ADS131A04IPBS |
|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Texas Instruments |
| Package | TSSOP-16 (FVZ) | TSSOP-16 (FVZ) - same | TSSOP-16 (FVZ) - same | TSSOP-16 (FVZ) - same | TSSOP-32 (widely different) |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 24 bits |
| Sampling Rate (max) | 125 kSPS | 125 kSPS | 125 kSPS | 125 kSPS | 128 kSPS |
| Number of Input Channels (SE/Diff) | 4 / 2 | 2 / 1 | 4 / 2 | 8 / 4 | 4 / 4 |
| Architecture | SAR | SAR | SAR | SAR | Delta-Sigma |
| Integrated Input Buffer | Yes | Yes | Yes | Yes | Yes |
| RoHS Compliance | Yes | Yes | Yes | Yes | Yes |
关键差异点
- Integrated input multiplexer and buffer amplifier in TSSOP-16 （对比 ISL26312FVZ-T)
- 12-bit SAR with deterministic conversion latency （对比 ADS131A04IPBS)
- Lower channel density compared to ISL26315FVZ family member （对比 ISL26315FVZ)
设计说明
Place a 10 µF low-ESR tantalum or ceramic bypass capacitor close to the AVD pin, in parallel with a 0.1 µF ceramic for high-frequency decoupling. Keep analog and digital ground planes joined at a single star-point directly beneath the ADC GND pin to minimize digital switching noise coupling into the analog inputs. Route analog input traces as short, guarded differential pairs away from SPI clock lines to preserve 12-bit linearity.
Do not exceed the maximum analog input voltage rating; over-driving the AIN pins will degrade linearity and may permanently damage the input buffer. Confirm that SCLK rise/fall times in your microcontroller meet the SPI timing requirements in the datasheet - excessive rise time can corrupt conversion results. Avoid running conversion cycles while the reference voltage is settling after power-up; insert an initialization delay per datasheet recommendations.
Source impedance above the input buffer's drive capability introduces gain error and DC offset. For source impedances above 1 kΩ, add an external buffer amplifier close to the sensor. When scanning between channels with significantly different common-mode voltages, allow adequate acquisition time per the datasheet timing section. Use a separate analog ground island for sensor returns, joined to the ADC ground at the star-point only.
合规信息
RoHS compliant and lead-free per Renesas product page and DigChip datasheet entry. Not AEC-Q100 qualified - this part is intended for industrial and consumer-grade applications.
