MAX118EPI+ - 8-Channel 8-Bit 1MSPS ADC | Maxim Integrated
料号： MAX118EPI+ ✓ 量产中MAX118EPI+ 概述
An analog-to-digital converter, or ADC, converts continuously varying analog voltages into digital values for processing, measurement, or control. The MAX118 belongs to the parallel-interface ADC hierarchy within data-converter and mixed-signal semiconductors. Unlike serial-interface converters, its eight-bit digital result is presented through parallel output lines, allowing direct connection to compatible microprocessor, microcontroller, or logic interfaces without a serial protocol.
The MAX118EPI+ provides one million conversions per second, an eight-bit resolution, and eight analog input channels. Its single +5V operation simplifies power-supply design in legacy and industrial equipment. The half-flash architecture is specifically intended to combine rapid conversion performance with microprocessor-compatible operation. An active-low power-down input permits the converter to remain at approximately 1µA when it is not needed and supports recovery to normal operation in less than 200ns.
The MAX118 family is offered in four-channel and eight-channel versions. The MAX118EPI+ is the eight-channel industrial-grade version in a 28-pin PDIP package. Its through-hole package supports legacy control boards and systems assembled with socketed or perforated-board construction. The parallel architecture makes the device particularly relevant to older industrial controllers, data acquisition instruments, and embedded systems that use direct digital input lines rather than SPI, I2C, or other serial ADC interfaces.
Typical uses include eight-channel sensor acquisition, process monitoring, laboratory measurement, industrial control, and legacy data logging. Eight analog channels can be sampled for temperature, pressure, position, or analog instrumentation signals, provided each signal remains within the device's supported input range and the system provides suitable conditioning. The 1MSPS conversion rate supports faster-changing events than a slow general-purpose system ADC while retaining a simple eight-bit parallel data path.
Designers should verify the complete pinout, input ranges, acquisition timing, and digital interface behavior against the manufacturer datasheet before layout or firmware work. Analog signal routing should minimize noise and crosstalk, while adequate bypassing should be placed close to the supply pins. Because this is a legacy parallel-interface converter, replacement decisions must consider not only resolution, speed, and channel count but also exact pin compatibility, logic levels, and timing.
This page combines manufacturer specifications, distributor pricing and availability data, same-family replacement information, and practical migration guidance. It distinguishes verified drop-in candidates from broader functional similarities so engineers can evaluate MAX118EPI+ replacements without confusing package compatibility with complete electrical equivalence.
直接替换替代料： MAX118EPI+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MAX118EPI
✅ 直接替换📋 参考替代料（不在目录中）
MAX118EPE+
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX118CPE+
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX118EPI+ 最大额定值与电气特性
| ADC Type | 8-bit flash analog-to-digital converter |
| Number of Analog Input Channels | 8 channels |
| 分辨率 | 8 bits |
| Conversion Rate | 1 MSPS |
| Conversion Time | 660 ns |
| Conversion Architecture | Half-flash |
| 电源电压 | +5 V |
| Digital Interface | Parallel microprocessor-compatible interface |
| Power-Down Current | Typically 1 µA |
| Power-Down Recovery Time | Less than 200 ns |
| 封装 | 28-pin PDIP |
| Package Pitch | 0.600 in (15.24 mm) |
| 安装类型 | Through-hole |
| Temperature Grade | Industrial |
| Number of Terminals | 28 terminals |
MAX118EPI+ 0.600 in (15.24 mm) 引脚配置指南
MAX118EPI+（0.600 in (15.24 mm) 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： MAX118EPI+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX118EPI+ 适用于 6 应用s: Legacy Industrial Process Monitoring, Eight-Channel Sensor Acquisition, Laboratory Data Logging, Legacy Microprocessor Interface, Industrial Control Signal Supervision, Repair and Production Test Systems.
Legacy Industrial Process Monitoring
The MAX118EPI+ fits legacy industrial process-monitoring boards that require eight analog measurements and a direct parallel data interface. Its eight 8-bit inputs can represent multiple pressure, position, level, or current-loop signals after suitable conditioning, while the 1MSPS conversion rate provides useful throughput for moderate-speed monitoring. The 660ns conversion interval supports deterministic acquisition in control or data-logging loops. Its 28-PDIP package is valuable when the existing board uses through-hole footprints and direct bus wiring. The designer should verify input range, sampling behavior, logic thresholds, and timing before replacing an installed converter.
推荐
Eight-Channel Sensor Acquisition
The MAX118EPI+ is suitable for compact eight-channel sensor acquisition when the system needs fast successive approximation rather than a slow, low-resolution input. Eight analog inputs provide a practical way to monitor thermistors, potentiometers, switches, and conditioned industrial sensors through one converter. At 1MSPS with 8-bit resolution, the device balances sampling throughput against data simplicity. Because its output is an 8-bit parallel byte, a microcontroller or processor can capture the measurement without a serial ADC clock. Signal conditioning, grounding, and input-sampling requirements must be reviewed against the manufacturer data sheet before deployment.
推荐
Laboratory Data Logging
The MAX118EPI+ can support laboratory and educational data-logging instruments that acquire several analog channels and store the results through a microprocessor-compatible parallel bus. Its 1MSPS conversion rate allows up to one million samples per second before system overhead, while eight channels reduce the need for multiple converters. The 8-bit output is adequate for supervisory measurements, status monitoring, and basic waveform capture rather than high-precision analysis. The through-hole 28-PDIP package is useful for hand-built or legacy instrument boards. Users should preserve recommended decoupling and pay particular attention to analog grounding and bus timing.
推荐
Legacy Microprocessor Interface
The MAX118EPI+ is appropriate for legacy microprocessor control systems designed around an 8-bit parallel ADC bus. Rather than serializing data through SPI or I2C, the converter presents an 8-bit result across dedicated output lines, allowing older processors to read the measurement with simpler interface logic. The eight input channels support supervisory or multiplexed analog supervision, and the 1MSPS half-flash conversion rate is substantially faster than the 660ns minimum conversion interval alone implies for an entire sampled word. Integration requires checking output-enable, read timing, address decoding, and supply levels against the specific processor and board schematic.
推荐
Industrial Control Signal Supervision
The MAX118EPI+ fits supervisory control functions that must observe several analog process signals while another controller performs primary regulation. Eight inputs can represent actuator feedback, supply levels, or filtered sensor outputs, and the 1MSPS conversion capability allows the supervisory loop to react to faster events than a basic alarm input. Its 8-bit resolution supports thresholding and coarse closed-loop supervision, while the parallel output reduces protocol overhead. The industrial-grade MAX118EPI+ ordering option is the logical baseline for such equipment. Firmware and hardware must ensure that acquisition timing, input limits, and power-down sequencing are compatible with the process-control architecture.
推荐
Repair and Production Test Systems
The MAX118EPI+ is useful in repair fixtures and production test equipment intended to emulate or replace legacy eight-channel ADC hardware. Its 28-PDIP through-hole package is convenient for socketed test adapters, while the eight parallel data outputs and eight analog inputs reproduce the architecture of older control boards. The 1MSPS conversion rate supports repeated test cycles and basic waveform checks without introducing a serial-interface adapter. Because ordering suffixes can indicate different temperature grades and product statuses, engineers should match the exact approved MPN. A schematic-level pin audit remains essential before claiming full board-level equivalence.
推荐
推荐产品汇总
工程参考数据： MAX118EPI+ ——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 | MAX118EPI | MAX118EPE+ | MAX118CPE+ |
|---|---|---|---|---|
| Package | 28-PDIP | 28-PDIP - same | 28-PDIP - same | 28-PDIP - same |
| Brand | Maxim Integrated | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same |
| ADC Resolution | 8 bits | 8 bits | 8 bits | 8 bits |
| Analog Input Channels | 8 channels | 8 channels | 8 channels | 8 channels |
| Conversion Rate | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS |
| Conversion Time | 660 ns | 660 ns | 660 ns | 660 ns |
| Supply Voltage | +5 V | +5 V | +5 V | +5 V |
| Power-Down Current | Typically 1 µA | Typically 1 µA | Typically 1 µA | Typically 1 µA |
关键差异点
- Eight-channel measurement in a legacy parallel-interface ADC （对比 MAX114EPI+)
- No serial-interface conversion stage required （对比 ADC0808)
- Verified 28-pin through-hole package and industrial-grade designation （对比 MAX118CPE+)
设计说明
Do not treat any 28-pin ADC as electrically interchangeable with the MAX118EPI+ solely because the package has the same pin count. MAX114 has four channels rather than eight, and ADC0808 compatibility must be checked at the individual power, control, timing, and output pins. Before substitution, compare the complete pin table, input range, conversion cycle, power-down polarity, and parallel-output timing from each manufacturer data sheet.
Preserve the MAX118 family's reference layout and place the recommended supply-bypass capacitor close to the device's supply connection. Keep analog input routing away from the parallel digital output bus and switching nodes to limit crosstalk. Because the verified data does not provide a complete recommended-land-pattern table, use the official MAX118 data sheet and package drawing rather than reconstructing the footprint from generic PDIP dimensions.
The converter operates from a single +5V supply and can enter a typical 1µA power-down state, recovering in less than 200ns. Firmware should assert the active-low power-down signal only when the host no longer needs valid conversion results. Check the digital-interface state during power-down and wake-up in the data sheet so the processor does not interpret stale or transitioning bus data as a valid measurement.
The 1MSPS rating describes conversion capability, not permission to operate eight arbitrary high-impedance sources without consideration of acquisition behavior. Review the manufacturer's input and acquisition specifications, add source impedance and settling-time analysis where necessary, and account for the 8-bit quantization of approximately 1 LSB per output code. External buffering may be required for slow or high-impedance sensors.
合规信息
The supplied manufacturer and distributor results do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is marked not_applicable because this is an ADC rather than an automotive-qualified component.