ISL26319FVZ-T - 12-bit 125kSPS 8-CH SAR ADC | Renesas
MPN: ISL26319FVZ-T ✓ Hoạt độngISL26319FVZ-T Tóm tắt
SAR ADCs are a class of analog-to-digital converters that resolve one bit per clock cycle through a switched-capacitor binary-weighted DAC. They are prized for deterministic latency, no pipeline delay, excellent DC linearity, and low power consumption at modest sample rates, making them a standard choice for industrial process control, instrumentation, data-acquisition front-ends, and multi-channel sensor readouts. Within the converter hierarchy, the ISL26319FVZ-T sits at the precision-low-power-mid-speed tier (12-bit, 125 kSPS), above micro-power 8/10-bit SARs and below 16/18/24-bit precision SARs or sigma-delta converters.
Key features include 8 single-ended input channels (or 4 differential), an SPI-compatible serial interface for configuration and data read-back, integrated input buffer with high impedance, an internal 4.096 V or external reference option, and an auto power-down mode that drops quiescent current to microampere levels between conversions. The wide supply range allows direct connection to 3.3 V or 5 V rails commonly found in industrial and battery-backed systems.
Typical applications include multi-channel data-acquisition modules, process-control sensor reading (temperature, pressure, strain-gauge bridges with external signal conditioning), battery monitoring in 12-24 V systems, PLC analog input cards, and portable instrumentation where low average power is mandatory.
Designers should provide a clean analog ground plane, decouple AVDD with a low-ESR 1 uF/100 nF pair, and observe the 50 ns minimum CS setup time. Auto power-down timing must be honored to achieve the 8 uA typical standby figure. This page consolidates distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ISL26319FVZ-T — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ISL26319FVZ-T (cùng hình factor và footprint) — khác nhau ở Interface, Number of Input Channels, Package, Resolution, Architecture.
ISL26315FVZ-T7A
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ISL26312FVZ-T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ISL26319FVZ-T Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bit |
| Sample Rate (max) | 125 kSPS |
| Number of Input Channels | 8 single-ended / 4 differential |
| Architecture | SAR (Successive Approximation) |
| Input Type | Single-ended and differential |
| Điện áp cung cấp | 2.7 V to 5.25 V (single supply) |
| Supply Current (active) | 3 mA typical |
| Power Dissipation (125 kSPS) | 11 mW typical |
| Power-Down Current | 8 uA typical (auto power-down between conversions) |
| Analog Input Range | 0 V to 5.25 V |
| Giao diện | SPI-compatible serial |
| Reference | Internal or external |
| Hộp | 16-TSSOP (FVZ) |
| Nhiệt độ hoạt động | -40C to +125C |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân ISL26319FVZ-T
| Chân 1 | AIN1 — Analog input channel 1 (single-ended) / AIN1+ (differential) |
| Chân 2 | AIN2 — Analog input channel 2 (single-ended) / AIN2+ (differential) |
| Chân 3 | AIN3 — Analog input channel 3 (single-ended) / AIN1- (differential) |
| Chân 4 | AIN4 — Analog input channel 4 (single-ended) / AIN3+ (differential) |
| Chân 5 | AGND — Analog ground |
| Chân 6 | REF — Voltage reference input/output (internal/external) |
| Chân 7 | AVDD — Analog supply voltage (2.7 V to 5.25 V) |
| Chân 8 | CS — Chip select (active low) for SPI |
| Chân 9 | SCLK — Serial clock input for SPI |
| Chân 10 | DOUT — Serial data output (SPI) |
| Chân 11 | DIN — Serial data input (SPI) for configuration |
| Chân 12 | AIN5 — Analog input channel 5 (single-ended) / AIN2- (differential) |
| Chân 13 | AIN6 — Analog input channel 6 (single-ended) / AIN4+ (differential) |
| Chân 14 | AIN7 — Analog input channel 7 (single-ended) / AIN3- (differential) |
| Chân 15 | AIN8 — Analog input channel 8 (single-ended) / AIN4- (differential) |
| Chân 16 | DGND — Digital ground |
Ứng dụng tiêu biểu
ISL26319FVZ-T phù hợp cho 6 Áp dụngs: Multi-Channel Data Acquisition Module, Industrial Process Control Inputs, Battery-Operated Sensor Logging, Portable Test and Measurement, Automotive Sensor Cluster Digitization, Medical Monitoring Front-End.
Multi-Channel Data Acquisition Module
The ISL26319FVZ-T's 8 single-ended inputs serve as the analog front end of a single-board data-acquisition module that scans thermocouples, RTDs, or 0-5 V process signals into an SPI-controlled MCU or FPGA. The proprietary input multiplexer and combination buffer reduce external signal-conditioning requirements, so each channel needs only a series input resistor and ESD diode to AVDD. With 125 kSPS aggregate throughput, the part captures all 8 channels sequentially faster than 10 us, meeting the scan rate of typical industrial PLC analog input cards while keeping total dissipation at 11 mW - far below discrete ADC alternatives.
Được đề xuất
Industrial Process Control Inputs
PLC analog input cards and distributed I/O nodes use the ISL26319FVZ-T to digitize 4-20 mA current-loop-derived voltages, strain-gauge bridge outputs, and pressure-transducer signals in 24 V industrial environments. The 5.25 V tolerant inputs accept direct connection from current-sense resistors, eliminating external op-amp buffers. SPI compatibility speeds FPGA or MCU polling, while the -40C to +125C operating range handles cabinet-temperature extremes. Auto power-down between scans keeps loop-powered 4-20 mA field nodes within their 3.5 mA budget.
Được đề xuất
Battery-Operated Sensor Logging
Wireless sensor loggers for environmental monitoring, cold-chain shipping, and remote asset tracking use the ISL26319FVZ-T to digitize up to 8 sensors at duty cycles below 1 percent. The 8 uA typical power-down current between conversions, combined with 11 mW active power at 125 kSPS, keeps average consumption under 200 uA from a single 3.3 V supply. A 2400 mAh primary LiSOCl2 cell can sustain multi-year loggers, while the small TSSOP-16 footprint fits miniature PCBAs for vibration-tolerant deployments.
Được đề xuất
Portable Test and Measurement
Handheld multimeters, oscilloscope probe front-ends, and field-service instrumentation rely on the ISL26319FVZ-T for snapshot multi-channel acquisitions where deterministic SAR latency and high impedance are valued. The 12-bit resolution and 125 kSPS sample rate suit voltage, current, and temperature readings derived from shunt or sensor bridges. SPI bus multiplexing simplifies pairing with an ARM Cortex-M0 host. Rugged industrial -40C to +125C operation supports outdoor and shop-floor use without thermally-induced calibration drift.
Được đề xuất
Automotive Sensor Cluster Digitization
Body controllers and HVAC modules use the ISL26319FVZ-T to digitize multiple cabin temperature sensors, potentiometer-based mode knobs, and battery monitoring shunts in 12 V and 24 V vehicle systems. The wide 2.7-5.25 V analog input range, derived from the 5 V internal rail, accommodates 0-5 V sensors directly. The -T13 reel variant operates over the full -40C to +125C under-hood thermal envelope. Engineers should confirm AEC-Q100 qualification with Renesas for safety-critical powertrain applications; this part suits body-electronic applications.
Được đề xuất
Medical Monitoring Front-End
Patient-monitoring peripherals (multi-parameter patches, spirometers, infusion pump pressure sensors) use the ISL26319FVZ-T to digitize low-frequency analog channels at low duty cycles where average power is critical. The 12-bit resolution suits clinical-grade accuracy targets when paired with proper signal conditioning. Auto power-down between conversions keeps continuous-monitoring wearable current budget low, while SPI enables digital isolation barriers for IEC 60601-1 patient-leakage compliance. Designers must verify IEC 60601-1 system-level qualification separately.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ISL26319FVZ-T — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ISL26315FVZ-T7A | ISL26312FVZ-T | ISL26311FBZ |
|---|---|---|---|---|
| Package | 16-TSSOP (FVZ) | 16-TSSOP (FVZ) - same | 16-TSSOP (FVZ) - same | 8-SOIC (FBZ) - different footprint |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit |
| Sample Rate (max) | 125 kSPS | 125 kSPS | 125 kSPS | 125 kSPS |
| Input Channels (single-ended) | 8 | 5 | 2 | 8 |
| Interface | SPI | SPI | SPI | SPI |
| 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 |
| Pin-to-Pin Compatible | Yes (reference design) | Yes (same TSSOP-16 pinout) | Yes (same TSSOP-16 pinout) | No (SOIC-8 footprint) |
Bảo phân biệt quan trọng
- Highest channel count in the Renesas ISL2631x family (vsISL26315FVZ-T7A)
- True-differential input stage (vsISL26312FVZ-T)
- Industrial -40C to +125C temperature range (vsISL26311FBZ)
Ghi chú thiết kế
The ISL26319FVZ-T achieves its 8 uA typical between-conversion current only when the auto power-down mode is enabled via SPI configuration. Decouple AVDD with a 1 uF X7R ceramic capacitor in parallel with a 100 nF NP0 cap placed within 2 mm of the AVDD pin to suppress digital switching transients from corrupting conversion accuracy. Estimated: at 100 percent duty cycle (continuous 125 kSPS conversion), total supply current is approximately 3 mA from 5 V AVDD.
Place the AGND pin bond directly to an analog ground island separated from digital ground by a single-point stitching under or near the IC. Route analog input traces as differential pairs (when used differentially) with characteristic impedance of 50 ohm over an unbroken analog ground plane. Star-route AGND and DGND at the package pad to avoid ground-loop currents that appear as ADC noise. NCD pins should be treated as analog signals, never as digital I/O.
Do not connect analog inputs directly to voltages above AVDD + 0.3 V or below AGND - 0.3 V without external clamping; the input multiplexer is not fault-tolerant. Ensure CS is held low for the entire 16 SCLK cycles; releasing CS mid-frame aborts the conversion. When using the internal reference, bypass the REF pin with a 100 nF NP0 ceramic capacitor to AGND. Estimated: with external reference, conversion noise improves by approximately 0.3 LSB versus internal reference at 25 C.
Thông tin tuân thủ
RoHS compliant per Renesas product page. Standard industrial grade; -T13 reel variant available for higher-volume assembly. AEC-Q100 status should be confirmed with Renesas for safety-critical automotive use.
