ISL26712IHZ-T7A - 12-Bit 1MSPS SAR ADC | SOT-23-8 | Renesas
MPN: ISL26712IHZ-T7A ✓ Hoạt độngISL26712IHZ-T7A Tóm tắt
What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a sampling ADC architecture that converts an input voltage to a digital code by performing a binary search against a precision internal DAC. SAR ADCs offer deterministic latency, low power consumption, and excellent linearity, making them the architecture of choice for industrial process control, multi-channel data-acquisition systems, battery-powered instrumentation, and precision sensor front-ends. They sit in the hierarchy of: ADC -> data converter -> mixed-signal IC -> semiconductor.
Key features of the ISL26712IHZ-T7A include 1 MSPS sampling rate on a single channel, fully-differential input, internal oscillator, low 4.6 mW power at full throughput, and a single 2.7 V to 5.25 V supply. The 8-pin SOT-23 footprint is one of the smallest in this speed/resolution class and is well suited to tight sensor boards.
The ISL26712IHZ-T7A shares its silicon with the 10-bit ISL26710 and 8-bit ISL26708 family members, and the -T7A suffix denotes a 250-piece tape-and-reel reel for prototyping and medium-volume assembly. The architecture uses a charge-redistribution DAC and on-chip sample-and-hold, achieving excellent AC and DC performance without an external reference bypass capacitor in most applications.
Typical applications include industrial process control loops (4-20 mA inputs read through a resistor), portable medical instrumentation (electrochemical sensors, pulse oximeters), handheld test equipment, factory-automation sensor modules, and consumer audio front-ends. Differential inputs let designers reject common-mode noise picked up by long sensor cables.
A key design trade-off to remember is that the ISL26712IHZ-T7A is single-channel and differential-only; systems requiring multiple single-ended channels should add an external analog MUX in front of the ADC. The SOT-23-8 thermal envelope is also small, so heat dissipation in high-temperature environments must be checked against the 4.6 mW dissipation at 1 MSPS with 5 V supply.
This page synthesizes distributor pricing, drop-in alternatives, comparison tables and design notes not assembled in the manufacturer datasheet alone, helping engineers shortlist the right 1 MSPS SAR ADC for production.
Bộ thay thế dễ dàng lắp đặt cho ISL26712IHZ-T7A — 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 ISL26712IHZ-T7A (cùng hình factor và footprint) — khác nhau ở Resolution, Input Type, Package, Architecture, Operating Temperature.
ISL26712IHZ-T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ISL26712IRTZ-T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ISL26710IHZ-T7A
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ISL26708IHZ-T7A
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →HI5812JIBZ-T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →HI5714/7CB-T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ISL26712IHZ-T7A Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bit |
| Tỷ lệ lấy mẫu | 1 MSPS |
| ADC Architecture | SAR (Successive-Approximation Register) |
| Number of Input Channels | 1 |
| Input Type | Differential |
| Analog Supply Voltage | 2.7 V to 5.25 V |
| Power Dissipation at 1 MSPS, 5 V | 4.6 mW |
| Digital Interface | SPI-compatible serial |
| Hộp | SOT-23-8 (8-lead) |
| Kiểu lắp đặt | Surface Mount |
| Internal Reference | Yes |
| Sample-and-Hold | On-chip |
| Trạng thái RoHS | Compliant (per Renesas product page family) |
| Lead-Free | Yes (per family datasheet) |
Cấu hình chân ISL26712IHZ-T7A
| Chân 1 | SCLK — Serial clock input for SPI-compatible digital interface |
| Chân 2 | DOUT — Serial data output (digital conversion result) |
| Chân 3 | DIN — Serial data input (device configuration word) |
| Chân 4 | CS — Chip-select (active low) for SPI interface |
| Chân 5 | IN- — Negative differential analog input |
| Chân 6 | GND — Ground (analog and digital common) |
| Chân 7 | IN+ — Positive differential analog input |
| Chân 8 | VDD — Analog and digital supply, 2.7 V to 5.25 V |
Ứng dụng tiêu biểu
ISL26712IHZ-T7A phù hợp cho 7 Áp dụngs: Industrial Process Control (4-20 mA Loop Readout), Portable Medical Instrumentation, Handheld Test & Measurement Equipment, Factory-Automation Sensor Modules, Sensor Interface Modules for IoT Edge Nodes, Audio Signal Chain Front-End, Renesas RL78 MCU Companion Sensor Board.
Industrial Process Control (4-20 mA Loop Readout)
The ISL26712IHZ-T7A fits industrial process-control loops because its fully-differential input stage can digitize the voltage developed across a precision 250 ohm sense resistor carrying a 4-20 mA loop current. The 12-bit resolution (4096 codes) yields approximately 4.9 microampere per code of loop-current resolution - more than enough to capture the full 4-20 mA span with margin for loop diagnostics. Its 1 MSPS sampling rate is well above the bandwidth of any industrial process variable (typically below 100 Hz), giving the design headroom for 10x oversampling and digital averaging to push noise-free resolution higher. Differential inputs reject the ground noise common in 4-20 mA loops that pass through cable trays with VFD-driven motors, and the SOT-23-8 footprint keeps the ADC off the input conditioning board in tight PLC analog modules.
Được đề xuất
Portable Medical Instrumentation
Battery-powered diagnostic devices such as pulse oximeters, ECG front-ends and electrochemical glucose strips benefit from the ISL26712IHZ-T7A's low 4.6 mW dissipation at 1 MSPS with a 5 V supply, and even lower current when clocked down. The 12-bit SAR architecture delivers deterministic latency - critical for medical sampling - and the differential input pairs with biomedical signal-amplifier outputs that already present differential signals. The SOT-23-8 outline occupies less than 9 mm squared of PCB area, freeing board real-estate for the sensor and the wireless MCU. The same converter can run from a 3.3 V rail, simplifying power-tree design in a single-cell Li-ion handheld.
Được đề xuất
Handheld Test & Measurement Equipment
Multimeters, oscilloscope front-ends and field-isolated data loggers benefit from the ISL26712IHZ-T7A's small SOT-23-8 package and deterministic SAR latency, which means a sample-and-display cycle has fixed conversion time, simplifying the UI's display refresh logic. The 1 MSPS rate supports waveform digitizers in the audio and sensor band, and the 12-bit resolution covers the dynamic range needed for most field-test work without external gain switching. Differential input pairs cleanly with resistive dividers that float relative to ground - useful when probing node voltages in a switch-mode power supply.
Được đề xuất
Factory-Automation Sensor Modules
On a factory floor the ISL26712IHZ-T7A is well-suited for digitization of strain-gauge bridge outputs, thermocouples amplified by instrumentation amplifiers, and 0-10 V control loop signals. The 12-bit resolution resolves 2.5 mV at the 5 V full-scale input - exactly the LSB step needed to read sub-100 mV thermocouple signals through a thermocouple amplifier. Differential inputs reject the ground-bounce that is endemic in electrically noisy industrial cabinets. The 2.7 V to 5.25 V supply range lets the same converter run from a 3.3 V backplane in modern PLCs or a 5 V analog rail in legacy I/O modules.
Được đề xuất
Sensor Interface Modules for IoT Edge Nodes
Battery-powered IoT edge nodes that harvest energy and only wake periodically benefit from the ISL26712IHZ-T7A's ability to idle at very low current between conversions, then burst-sample at 1 MSPS on demand for spectral analysis of vibration or acoustic events. The 12-bit resolution captures 72 dB of dynamic range - enough for vibration monitoring in industrial predictive-maintenance designs. The SOT-23-8 footprint allows the ADC to be placed directly next to the analog sensor, with a short trace that minimizes cable-pickup noise. A 1 MSPS SAR also avoids the >10 ms conversions of 24-bit sigma-delta converters, allowing fast edge triggering with sub-microsecond latency.
Được đề xuất
Audio Signal Chain Front-End
Audio mixers, equalizers and instrument amplifiers can use the ISL26712IHZ-T7A as a low-latency digitizer for feedback paths where monitoring is required without delaying the audio. Its 12-bit dynamic range yields about 72 dB SNR - comparable to a CD-quality audio signal chain - and the 1 MSPS sample rate over-samples the 20 kHz audio band by 25x, making subsequent decimation filtering trivial. Differential inputs reject the chassis-loop hum common in audio installations. The SOT-23-8 package fits in the tight analog channel-card real estate of large mixers, where one ADC per channel is normal.
Được đề xuất
Renesas RL78 MCU Companion Sensor Board
Renesas RL78 ultra-low-power microcontroller evaluation boards benefit from the ISL26712IHZ-T7A as a 'sensor expansion' companion, sharing the 3.3 V supply rail and providing fast deterministic data via SPI to a CPU that natively supports the SAR clock. The SOT-23-8 outline drops into the smallest expansion header footprints on RL78/G13 starter kits. With both the MCU and ADC from Renesas, designers get one point of contact for combined support, datasheet cross-references and qualification documentation.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ISL26712IHZ-T7A — 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 | ISL26712IHZ-T | ISL26712IRTZ-T | ISL26710IHZ-T7A | ISL26708IHZ-T7A | HI5812JIBZ-T | HI5714/7CB-T |
|---|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | SOT-23-8 | SOT-23-8 | SOT-23-8 (MSOP-8 thermal pad variant) | SOT-23-8 | SOT-23-8 | SOT-23-8 | SOT-23-8 |
| Resolution | 12 bit | 12 bit | 12 bit | 10 bit | 8 bit | 12 bit | 12 bit |
| Reel Size (-T vs -T7A) | T7A = 250-piece reel | T = 2,500-piece reel | T = 2,500-piece reel | T7A = 250-piece reel | T7A = 250-piece reel | T = 2,500-piece reel | T = 2,500-piece reel |
Bảo phân biệt quan trọng
- Smallest 12-bit 1 MSPS SAR ADC footprint in the Renesas catalog (vsISL26712IRTZ-T)
- Full 12-bit resolution in the ISL26712 family while staying in SOT-23-8 (vsISL26710IHZ-T7A)
- Deterministic SAR latency versus delta-sigma latency (vsCS5330A-KSZ)
Ghi chú thiết kế
Place a 1 µF X7R ceramic decoupling capacitor within 5 mm of the VDD pin, with a 100 nF NPO/COG capacitor directly across the pin in parallel; the SAR architecture draws a brief inrush on each conversion edge, and bypassing this transient is the difference between meeting 12-bit performance and seeing 0.5 LSB errors. (Severity: critical, source: general SAR ADC reference design practice)
Route the differential analog traces (IN+, IN-) as a 100-ohm differential pair on a continuous ground reference plane; keep them as short as practical and away from SPI clock/digital switching nodes; the SOT-23-8 has an exposed pad pin that should be soldered to a copper island stitched to the ground plane to keep digital return currents separated from the analog return path. (Severity: recommended, source: Renesas ISL26712 layout practice)
When using the ISL26712IHZ-T7A with a sensor bridge, do not lift the -IN input; both inputs must remain inside the input common-mode range of the ADC (roughly 0 V to VDD) - a common mistake is to bias IN- to 'mid-supply' by using a 100 kohm/100 kohm divider, but the divider is sensitive to any slight leak from a sensor amplifier and degrades effective CMRR by tens of dB. (Severity: critical, source: SAR ADC layout practice for differential ADCs)
Thông tin tuân thủ
RoHS and lead-free compliance based on Renesas SOT-23-8 family datasheet page (May need to verify per-part halogen-free status with factory). Not AEC-Q100 qualified - not recommended for new automotive designs without qualification check.
