ADM488AR - 250kbps Low-Power RS-485 Transceiver | Analog Devices
料号： ADM488AR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ADM488AR 概述
An RS-485 transceiver is an interface IC that combines a differential driver and receiver, converting logic-level signals into balanced bus signals and restoring weak or noisy bus logic levels at the receiving endpoint. In the component hierarchy, the ADM488AR is an RS-485 transceiver, an interface IC, a communications semiconductor, and a physical-layer device supporting EIA RS-485 and RS-422 networks. Full duplex provides separate transmit and receive paths, allowing a node to send and receive independently when its bus architecture supports that operation.
The verified electrical features emphasize low power, controlled edges, and multipoint-bus robustness. A single 5 V supply with ±10% tolerance simplifies interface design, while 12 kΩ receiver loading permits more devices on a bus than lower-impedance receivers. The ±12 V common-mode range covers a substantial portion of industrial ground-offset conditions. Slew-rate limiting is particularly useful when slower, rounded edges reduce EMI and ringing, although cable length, topology, termination, and data rate remain system-level constraints.
The ADM488AR family is specified for EIA RS-485 and RS-422 communication, as described by Analog Devices. The AR ordering code identifies the verified surface-mount package configuration, while the manufacturer product page identifies the family as a production product. Exact pin names, temperature range, supply-current limits, receiver thresholds, driver-output levels, package dimensions, and absolute maximum ratings were not available in the supplied excerpts and therefore must be confirmed from the manufacturer datasheet before layout or qualification.
Typical uses include industrial automation links, building-control networks, instrumentation buses, factory equipment, remote sensor interfaces, and embedded data links. The 250 kbps ceiling favors moderate-speed control and monitoring rather than high-bandwidth Ethernet or very fast storage interfaces. In a full-duplex design, pair the driver and receiver with the bus transceiver's specified pins, route differential traces as a controlled impedance pair, and apply termination and biasing only where required by the network architecture.
The principal design consideration is that slew-rate limiting is a system tradeoff rather than a universal solution. Rounded transitions can reduce high-frequency content, but overly slow edges consume signal rise-time budget and may prevent reliable operation at the maximum 250 kbps rate over long cables. PCB symmetry, connector return paths, grounding, cable type, node spacing, common-mode behavior, and protection placement must be validated together.
This page combines verified Analog Devices family information, distributor evidence, sourcing status, interface-application guidance, and a strict drop-in comparison framework. It also distinguishes confirmed specifications from unavailable values, helping engineers identify which details require direct review of the official ADM488 datasheet and package drawings before release to production.
直接替换替代料： ADM488AR ——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：
ADM488ARZ-REEL7
✅ 直接替换📋 参考替代料（不在目录中）
ADM488AR 规格参数
| Product Type | Full-duplex differential line transceiver |
| Supported Standards | EIA RS-485 and RS-422 |
| Nominal Supply Voltage | 5 V |
| Supply Voltage Tolerance | ±10% |
| Maximum Data Rate | 250 kbps |
| Bus Common-Mode Range | ±12 V |
| Receiver Input Impedance | 12 kΩ |
| EFT Protection | 2 kV |
| Transient-System Reference | IEC 1000-4-4 |
| Edge Rate Control | Slew-rate limited |
| Duplex Mode | Full duplex |
| Bus Application | Multipoint balanced transmission line |
| 封装 | SOIC-8 |
| 安装类型 | Surface mount |
| Production Status | Production |
ADM488AR soic-8 引脚配置指南
ADM488AR（soic-8 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： ADM488AR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADM488AR 适用于 6 应用s: Industrial Automation Equipment Links, Building Control and HVAC Networks, Remote Sensor and Instrumentation Links, Factory Equipment Communication Buses, Data Acquisition and Test Systems, Low-Speed Embedded Communication Networks.
Industrial Automation Equipment Links
The ADM488AR fits moderate-speed supervisory and control links between industrial controllers, remote I/O modules, sensors, and actuators. Its verified 250 kbps ceiling is suitable for command, status, and configuration traffic rather than high-volume motion data. The ±12 V bus common-mode range provides useful tolerance for ground-potential differences in distributed equipment, while 2 kV EFT protection targets electrically noisy industrial environments. Designers should preserve differential trace symmetry, provide a low-impedance supply reference, and confirm network length and loading against the official ADM488 data sheet before enabling the 250 kbps operating point.
推荐
Building Control and HVAC Networks
The ADM488AR is appropriate for full-duplex building-control links carrying configuration, status, and sensor data between controllers and field equipment. Its low-power, slew-rate-limited operation is useful on balanced wiring where limiting abrupt high-frequency content helps control reflections. The 250 kbps rate exceeds many supervisory control requirements, while the ±12 V common-mode range offers tolerance for ground offsets between separately powered panels. For a robust building network, define node direction, install termination only where required by the bus topology, and verify fire-code, installation wiring, and surge requirements independently of the semiconductor specification.
推荐
Remote Sensor and Instrumentation Links
The ADM488AR can connect a remote sensing or instrumentation subsystem over a balanced cable when throughput remains at or below 250 kbps. Differential reception and a 12 kΩ receiver input impedance are valuable in multipoint arrangements because they support loading considerations across several attached nodes. The 5 V ±10% supply aligns with many embedded systems, while controlled edge rates reduce the likelihood of unnecessarily fast transitions on the cable. Engineers should calculate the complete input loading and cable budget, select an appropriate common-mode choke or surge strategy for the installation, and verify grounding so that external transients do not exceed the device's actual absolute maximum ratings.
推荐
Factory Equipment Communication Buses
The ADM488AR supports equipment-to-equipment communication in factories where command traffic must cross electrically noisy cable runs but does not require high-speed data. Its 250 kbps limit is suitable for machine configuration, state reporting, diagnostics, and supervisory control. The ±12 V common-mode specification is relevant when equipment grounds are not perfectly equal, and the 2 kV EFT protection provides a defined industrial transient target. Because RS-485 does not specify a universal connector, termination, or protection scheme, the board and cabinet design must still account for cable type, branch topology, surge environment, and node enable sequencing.
推荐
Data Acquisition and Test Systems
The ADM488AR can provide a balanced test or data-acquisition link between a controller and distributed measurement hardware. Its slew-rate-limited differential output is useful when preserving signal integrity across bench or plant cabling, while 250 kbps is sufficient for many digitized control and status channels. The interface is not a substitute for a high-speed isolated communication link, so designers should not use it when latency, sampling synchronization, or waveform bandwidth exceeds the family rate. Validate cable length, receiver count, common-mode offset, grounding, and any galvanic-isolation barrier as part of the measurement-system error budget.
推荐
Low-Speed Embedded Communication Networks
The ADM488AR fits embedded equipment that exchanges control packets, diagnostics, and configuration over a balanced multipoint line at up to 250 kbps. A nominal 5 V supply with ±10% tolerance is convenient for many control boards, and full duplex allows independent transmit and receive paths when the network wiring supports four-wire communication. Designers should compare this architecture against half-duplex alternatives to ensure that the pinout and board wiring expectations match. Protocol timing must also allow the slower controlled edges, and software should manage bus direction, startup contention, idle states, and fault recovery without assuming zero-cost pin or timing interchangeability.
推荐
推荐产品汇总
工程参考数据： ADM488AR ——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 | ADM488ARZ-REEL7 |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | SOIC-8 | SOIC-8 |
| Product Family | ADM488 | ADM488 |
| Interface Type | Full-duplex RS-485/RS-422 transceiver | Full-duplex RS-485/RS-422 transceiver |
| Nominal Supply Voltage | 5 V ±10% | 5 V ±10% |
| Maximum Data Rate | 250 kbps | 250 kbps |
| Bus Common-Mode Range | ±12 V | ±12 V |
| Receiver Input Impedance | 12 kΩ | 12 kΩ |
| EFT Protection | 2 kV | 2 kV |
关键差异点
- Moderate-speed full-duplex communication with controlled edges （对比 ADM485AR)
- Receiver loading suitable for multipoint-bus assessment （对比 ADM4850ARZ)
- Defined industrial transient target （对比 Generic SOIC-8 RS-485 alternatives)
设计说明
Route driver and receiver differential pairs as matched traces over a continuous ground plane, with no plane splits or uncontrolled stubs. Keep the transceiver close to the connector and place protection components at the cable entry rather than beside the logic circuitry. Full-duplex wiring also needs careful separation between the outbound and inbound pairs so that transmitted edge energy couples as little as possible into the receive path.
Treat the 250 kbps value as a family limit, not a guarantee for every cable and topology. Validate rise-time margin, reflections, node loading, differential voltage, and receiver threshold at the longest intended cable. Because the ADM488 is slew-rate limited, excessive edge rounding can erode timing margin, especially when many branches, connectors, or long cable segments increase propagation delay.
Do not infer terminal assignments from a generic eight-pin RS-485 footprint. The supplied excerpts do not expose the ADM488AR pin names, so verify the official package drawing, supply pins, driver input and enable pins, receiver output, ground, and bus terminals before layout. Also avoid declaring a related ordering code a substitute unless its datasheet proves identical package pinout and electrical requirements.
Slew-rate control helps reduce high-frequency content, but EMI performance still depends on connector return paths, cable shield termination, common-mode impedance, and enclosure grounding. If the cable leaves the board, evaluate ESD, EFT, surge, and galvanic-isolation requirements for the actual installation. The verified 2 kV EFT figure should not be interpreted as all-around surge immunity.
合规信息
The supplied excerpts confirm production status and reference IEC 1000-4-4, but they do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations.
