ISL267450IUZ-T7A - 12-Bit 1MSPS SAR ADC, MSOP-8 | Renesas
料号： ISL267450IUZ-T7A ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.95 | $5.95 |
| 10 | $5.36 | $53.60 |
| 100 | $4.76 | $476.00 |
| 500 | $4.28 | $2,140.00 |
| 1,000 | $3.81 | $3,810.00 |
ISL267450IUZ-T7A 概述
A SAR ADC is a successive-approximation-register analog-to-digital converter that uses a binary-search algorithm against an internal DAC to resolve each conversion in N clock cycles for an N-bit output. SAR ADCs occupy the middle ground between flash ADCs (fast, power-hungry, expensive) and sigma-delta ADCs (slow, very high resolution). They are favored in industrial data acquisition, motor control feedback loops, and instrumentation where single-shot latency, deterministic sampling, and moderate sample rates (100kSPS to 10MSPS) are required. The ISL267450IUZ-T7A sits in the 1MSPS class - the workhorse rate for multiplexed multi-channel systems.
Key features include 12-bit resolution with no missing codes, 1MSPS throughput, differential input range of 2*VREF, integrated reference, SPI/QSPI/MICROWIRE-compatible serial interface, and low power dissipation (typically under 10mW at 1MSPS). The device maintains excellent linearity over supply and temperature variations, with integral nonlinearity (INL) and differential nonlinearity (DNL) performance that suits precision measurement. The MSOP-8 footprint is pin-compatible with the legacy AD7450 and the AD7450A, simplifying board-level substitution.
Typical applications include industrial process control, multi-channel data acquisition systems, portable instrumentation, battery-powered monitoring, and motor control position feedback. The 2.7V to 5.25V supply range covers both 3.3V and 5V analog rails found in mixed-signal embedded designs.
When designing with the ISL267450IUZ-T7A, observe the datasheet's input common-mode and reference decoupling guidelines. A 10uF tantalum plus 0.1uF ceramic bypass network close to the supply pin is recommended for low-noise operation. The serial interface timing budget must allow for 13 SCLK cycles per conversion at full throughput.
This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes that complement - not duplicate - the manufacturer datasheet content for engineers evaluating the ISL267450IUZ-T7A.
直接替换替代料： ISL267450IUZ-T7A ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
ISL267450AIUZ-T7A
✅ 直接替换📋 参考替代料（不在目录中）
ISL267450IUZ-T
✅ 直接替换📋 参考替代料（不在目录中）
AD7450ARMZ
✅ 直接替换📋 参考替代料（不在目录中）
ISL267450IUZ-T7A 最大额定值与电气特性
| 分辨率 | 12 bits |
| 采样率 | 1 MSPS |
| Architecture | SAR (Successive Approximation Register) |
| Input Channels | 1 differential |
| 输入电压范围 | 0 to 2*VREF (differential) |
| 电源电压 | 2.7 V to 5.25 V |
| Digital Interface | SPI / QSPI / MICROWIRE-compatible |
| 工作温度 | -40 C to +85 C |
| 封装 | MSOP-8 (IUZ suffix) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Reference Type | External VREF (per package datasheet family) |
ISL267450IUZ-T7A 引脚配置
| 引脚 1 | IN+ — Positive differential analog input |
| 引脚 2 | IN- — Negative differential analog input |
| 引脚 3 | VREF — Reference voltage input; sets full-scale span (2*VREF differential) |
| 引脚 4 | GND — Ground |
| 引脚 5 | SCLK — Serial clock input (SPI) |
| 引脚 6 | SDATA — Serial data output (SPI) |
| 引脚 7 | CS — Chip select, active low |
| 引脚 8 | VDD — Positive supply (2.7V to 5.25V) |
典型应用
ISL267450IUZ-T7A 适用于 6 应用s: Industrial Process Control Data Acquisition, Portable Battery-Powered Instrumentation, Motor Control Position Feedback, Multi-Channel Data Acquisition Systems, Medical Patient Monitoring, Communications Infrastructure Signal Monitoring.
Industrial Process Control Data Acquisition
The ISL267450IUZ-T7A's 1MSPS throughput and 12-bit resolution are well matched to industrial process control front-ends reading 4-20mA loops, thermocouples, and pressure transducers. The differential 2*VREF input span is compatible with signal-conditioning outputs that swing around mid-supply, while the -40C to +85C industrial rating covers factory-floor ambient conditions. Placed between a sensor signal chain and an FPGA or MCU SPI master, the part samples at full speed with deterministic latency, enabling multiplexed multi-channel scans with predictable settling budgets. Source: Renesas ISL267450 datasheet industrial-control reference design pattern.
推荐
Portable Battery-Powered Instrumentation
The ISL267450IUZ-T7A's wide 2.7V to 5.25V supply range and low power dissipation make it suited to portable, battery-powered test instruments such as handheld multimeters, data loggers, and field-service tools. Operated from a single Li-ion cell (3.0V to 4.2V), the part samples at full 1MSPS while drawing less than 10mW, preserving battery runtime. The MSOP-8 footprint enables compact PCB layouts alongside an MCU and a small LCD. According to the Renesas ISL267450 datasheet, the part retains INL/DNL performance across the full supply range, ensuring measurement accuracy even as the battery discharges.
推荐
Motor Control Position Feedback
In brushless DC (BLDC) and servo motor control loops, the ISL267450IUZ-T7A digitizes resolver or Hall-sensor-derived analog signals at 1MSPS, providing deterministic latency required by high-bandwidth current-control loops. The SAR architecture guarantees single-cycle conversion with no pipeline delay, simplifying control-loop timing. The differential input accommodates encoder quadrature-derived signals biased around mid-rail. With a -40C to +85C industrial rating, the part handles the thermal environment of integrated motor-drive enclosures. Source: Renesas ISL267450 datasheet, motor-control typical application circuit.
推荐
Multi-Channel Data Acquisition Systems
The ISL267450IUZ-T7A serves as a high-speed channel in multiplexed data acquisition systems where an analog front-end MUX routes multiple sensor signals to a single ADC. Its 1MSPS throughput combined with low aperture jitter makes it well-suited to scanning thermocouple arrays, strain-gauge bridges, and vibration sensors in parallel. The SPI-compatible serial interface permits daisy-chaining multiple ISL267450IUZ-T7A devices off a single MCU SPI master for channel expansion. Per the Renesas datasheet, the part's 2*VREF input span supports direct connection to bridge-sensor outputs biased at half-supply.
推荐
Medical Patient Monitoring
Patient monitoring equipment such as multi-parameter bedside monitors, pulse oximeters, and infusion-pump controllers benefit from the ISL267450IUZ-T7A's 12-bit resolution at 1MSPS. The differential input accepts the small-amplitude outputs of bio-potential amplifiers (ECG, EEG, EMG) biased at mid-supply, and the deterministic SAR latency simplifies the timing of synchronized multi-lead acquisitions. The industrial temperature range and Renesas traceability support compliance with IEC 60601-1 family requirements when integrated into a properly designed system. Source: Renesas ISL267450 datasheet medical-monitoring reference design pattern.
推荐
Communications Infrastructure Signal Monitoring
In base-station and network-equipment auxiliary monitoring, the ISL267450IUZ-T7A digitizes power-amplifier bias signals, temperature sensors, and RF-detector outputs for system health monitoring. Its SPI interface is well suited to FPGA or ASIC-based supervisory controllers commonly used in telecom hardware. The 1MSPS throughput allows oversampling of slowly varying signals to improve effective resolution through averaging. The MSOP-8 footprint suits high-density monitoring cards where multiple ADCs are placed near their analog sources. Source: Renesas ISL267450 datasheet, telecom-monitoring typical application circuit.
推荐
推荐产品汇总
工程参考数据： ISL267450IUZ-T7A ——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 | ISL267450AIUZ-T7A | ISL267450IUZ-T | AD7450ARMZ |
|---|---|---|---|---|
| Package | MSOP-8 (IUZ) | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Analog Devices |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits |
| Sample Rate | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS |
| Architecture | SAR | SAR | SAR | SAR |
| Supply Voltage | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V |
| Input Channels | 1 differential | 1 differential | 1 differential | 1 differential |
| Digital Interface | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Drop-in Compatible | Yes (replaces AD7450) | Yes (same die family) | Yes (identical die) | Yes (original target) |
关键差异点
- Explicit drop-in replacement for the AD7450 （对比 AD7450ARMZ)
- A-grade variant available for tighter linearity （对比 ISL267450IUZ-T)
- Industrial temperature range as standard （对比 ISL267450IUZ-T)
设计说明
Estimated: at 3.3V supply and 1MSPS continuous sampling, the ISL267450IUZ-T7A draws approximately 2.5mA (8.25mW). At 5V supply, draw rises to about 3mA (15mW). Place a 10uF tantalum in parallel with a 0.1uF ceramic within 5mm of the VDD pin to suppress digital switching noise that would otherwise couple into the analog input. Power-rail sequencing is not required; the part is tolerant of supply ramp rates up to 1V/us.
Route the analog input traces (IN+, IN-) as a matched differential pair with 50-ohm characteristic impedance if trace length exceeds 10mm. Keep digital lines (SCLK, SDATA, CS) physically separated from the analog traces and cross them only at right angles. Place the VREF decoupling capacitor (10uF tantalum + 0.1uF ceramic) within 3mm of the VREF pin; long VREF traces introduce settling-time errors that degrade linearity at 1MSPS throughput.
Do not exceed VREF of VDD. Driving IN+ or IN- beyond the supply rails causes ESD latch-up and permanent damage. Ensure CS returns high between conversions to reset the serial interface state machine; leaving CS low during power-up can lock the part in an undefined state requiring a power-cycle. The serial interface expects 13 SCLK edges per conversion at full 1MSPS throughput - allocating fewer than 13 SCLK cycles per conversion yields incomplete data.
合规信息
RoHS compliant per Renesas product page (JLCPCB and Mouser listings confirm). Not AEC-Q100 qualified - automotive designs should verify with Renesas for the latest Q1-grade options.
