MAX118CAI+ - 8-Channel 8-Bit 1Msps ADC | Maxim Integrated
料号： MAX118CAI+ ✓ 量产中MAX118CAI+ 概述
An ADC is an analog-to-digital converter, a semiconductor interface that transforms continuously varying analog voltages into numerical values suitable for digital processing. The MAX118 belongs to the parallel-interface ADC family within the broader data-converter and signal-processing semiconductor hierarchy. It is intended for systems where multiple analog inputs must be measured quickly, but higher resolution is not required. The MAX118 family is particularly suitable for industrial monitoring, control systems, data acquisition, and embedded instrumentation where a parallel bus simplifies connection to a processor.
The MAX118CAI+ combines a 1 Msps sampling rate with an 8-bit resolution, producing 256 possible output codes for each channel. Its half-flash architecture is designed to provide microprocessor-compatible operation and faster conversion than traditional successive-approximation converters of the same general class. The eight-channel arrangement allows one ADC package to monitor multiple sensors or control points, reducing component count and simplifying firmware addressing.
Power management is an important feature of this converter. The active-low PWRDN pin allows the system to place the ADC into a low-current state when measurements are not required. Typical power-down current is 1 µA, and the device can resume normal operation in less than 200 ns. This combination supports portable and intermittently sampled equipment while limiting standby power consumption.
Typical applications include process-control loops, factory automation, digital panel meters, data-acquisition systems, battery-operated instruments, and embedded control platforms. The 28-pin SSOP package is useful for designs requiring a through-hole-compatible surface-mount footprint and straightforward routing to a microprocessor bus. Designers should provide a stable +5 V supply, observe the manufacturer’s input-voltage limits, account for analog signal conditioning, and ensure that the parallel output timing is compatible with the host processor.
This page combines the verified manufacturer and distributor information for MAX118CAI+ with package, application, comparison, and design guidance intended to support practical engineering selection.
直接替换替代料： MAX118CAI+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MAX118EAI+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX118CAI
✅ 直接替换📋 参考替代料（不在目录中）
MAX118CAI+ 最大额定值与电气特性
| Product Type | 8-bit analog-to-digital converter |
| 分辨率 | 8 bits |
| Number of Analog Inputs | 8 single-ended inputs |
| 采样率 | 1 Msps |
| Conversion Time | 660 ns |
| Conversion Architecture | Half-flash |
| 电源电压 | +5 V single supply |
| Power-Down Current | 1 µA typical |
| Power-Down Control | Active-low PWRDN pin |
| Power-Down Recovery Time | Less than 200 ns |
| Output Interface | Parallel microprocessor-compatible output |
| Input Type | Single-ended |
| 封装 | 28-pin SSOP |
| Terminal Count | 28 pins |
| Package Type | Rectangular gull-wing SSOP |
| Commercial Temperature Grade | Commercial |
MAX118CAI+ rectangular gull-wing ssop 引脚配置指南
MAX118CAI+（rectangular gull-wing ssop 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： MAX118CAI+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX118CAI+ 适用于 6 应用s: Industrial Process Monitoring, Data Acquisition Systems, Embedded Control Platforms, Digital Panel Meters, Portable Measurement Instruments, Control Signal Monitoring.
Industrial Process Monitoring
The MAX118CAI+ fits industrial process monitoring because it combines eight single-ended analog inputs with a 1 Msps conversion rate in one 28-pin SSOP package. A controller can sample multiple pressure, temperature, level, or valve-position signals without requiring eight separate converters. The 660 ns half-flash conversion time supports rapid updates, while the active-low PWRDN input can reduce consumption during idle intervals. Analog front-end conditioning, grounding, and isolation remain system-level responsibilities.
推荐
Data Acquisition Systems
For data-acquisition systems, the MAX118CAI+ provides eight analog channels, 8-bit digital resolution, and up to 1 Msps sampling in a parallel-output architecture. It is useful where a processor or controller must acquire several changing inputs over a short acquisition interval. The 256-code output resolution is appropriate for supervisory, status, and trend measurements rather than precision laboratory analysis. The host processor must accommodate the parallel output timing and provide suitable analog buffering where required.
推荐
Embedded Control Platforms
The MAX118CAI+ is appropriate for embedded control platforms that monitor multiple actuator or sensor states using a microprocessor-compatible bus. Its eight single-ended inputs reduce the number of external conversion channels, while the parallel output can simplify direct host-controller interfacing. A 1 Msps conversion rate provides responsiveness for control and monitoring loops. The active-low shutdown function supports duty-cycled operation, and designers should account for bus timing, input settling, and digital signal integrity when assigning processor I/O.
推荐
Digital Panel Meters
The MAX118CAI+ can serve as the input converter in a digital panel meter that displays several process variables. Eight single-ended inputs allow one device to cover multiple analog gauges, while the 8-bit resolution and 1 Msps rate support rapidly refreshed numerical readings. Its power-down capability is valuable in portable or battery-operated meters where the display and converter do not need continuous operation. Calibration, input protection, and reference accuracy will strongly influence the usefulness of the 8-bit measurement result.
推荐
Portable Measurement Instruments
The MAX118CAI+ is suitable for portable measurement instruments because it combines eight input channels with a typical 1 µA power-down current and recovery in less than 200 ns. The system can leave the converter disabled between measurement bursts and restore operation quickly when data is required. The single +5 V supply simplifies power architecture compared with dual-supply converters. Low standby current does not by itself determine battery life, so the complete instrument must also account for display, processor, sensor, and analog-conditioning consumption.
推荐
Control Signal Monitoring
The MAX118CAI+ can monitor eight control or status signals where a controller needs regularly updated digital representations of analog levels. Inputs may represent potentiometer positions, command voltages, sensor outputs, or supply-derived status signals, subject to the device’s specified operating range. The 660 ns conversion time and 1 Msps rate allow closely spaced measurements, while the parallel interface allows a host processor to retrieve results directly. Conditioning and input protection should be added whenever external wiring can introduce transients or out-of-range voltages.
推荐
推荐产品汇总
工程参考数据： MAX118CAI+ ——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 | MAX118EAI+T | MAX118CAI |
|---|---|---|---|
| Package | 28-pin SSOP | 28-pin SSOP | 28-pin SSOP |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 8 bits | 8 bits | 8 bits |
| Analog Input Channels | 8 single-ended inputs | 8 single-ended inputs | 8 single-ended inputs |
| Sampling Rate | 1 Msps | 1 Msps | 1 Msps |
| Conversion Time | 660 ns | 660 ns | 660 ns |
| Supply Voltage | +5 V single supply | +5 V single supply | +5 V single supply |
| Conversion Architecture | Half-flash | Half-flash | Half-flash |
| Output Interface | Parallel microprocessor-compatible output | Parallel | Parallel |
| Power-Down Current | 1 µA typical | 1 µA typical | 1 µA typical |
关键差异点
- Eight-channel integration （对比 MAX1112CAP+)
- Parallel 1 Msps conversion （对比 ADC0838CIWMX/NOPB)
- Verified low-power shutdown behavior （对比 MAX118EAI+T)
设计说明
Do not treat the identical SSOP-28 package as proof that every replacement is electrically interchangeable. Compare the manufacturer pin function table, absolute maximum ratings, input range, reference arrangement, and power-up behavior for MAX118CAI+ and MAX118EAI+T. The supplied web comparison confirms the principal architecture, interface, and package, but ordering-code temperature and commercial details still require verification against the current datasheet before a substitution is released.
Use the active-low PWRDN input to place the MAX118CAI+ into its verified 1 µA-typical shutdown state only after confirming the host logic voltage and pin behavior from the manufacturer datasheet. The converter is specified to return to normal operation in less than 200 ns, making short duty cycles practical. Keep the supply stable during startup and wake-up because a rapidly enabled converter can expose input settling, reference settling, and bus timing problems that are hidden in slow-start laboratory tests.
Route the analog inputs and reference connections away from the parallel digital output and clock-sensitive traces. Place input-conditioning components close to the relevant MAX118CAI+ pins and maintain a compact ground return for the analog section. The parallel bus can switch several outputs simultaneously, so board-level return paths should be designed to limit coupling into the eight analog channels. Confirm the recommended layout and reference connection in the manufacturer datasheet before finalizing the PCB.
合规信息
The supplied verified web results identify the MAX118CAI+ as a commercial-grade MAX118 device but do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. These fields remain unknown rather than being inferred.