ADM483ARZ - 250 kbps RS-485/RS-422 Transceiver | Analog Devices
料号： ADM483ARZ ✓ 量产中ADM483ARZ 概述
An RS-485/RS-422 transceiver is an interface IC that converts logic-level transmit and receive signals into balanced differential signals suitable for reliable communication over wired buses. RS-485 supports multipoint, half-duplex networks, while RS-422 provides a differential signaling foundation for point-to-point links. The ADM483 belongs to the broader interface IC hierarchy alongside UARTs, isolated transceivers, CAN transceivers, and other wired-communication interface devices.
The ADM483’s principal feature is its controlled slew rate. Slowing the driver edge rate reduces electromagnetic interference and ringing on slow or terminated cabling while preserving operation at up to 250 kbps. The device also supports high-impedance driver output when disabled or powered off, thermal shutdown, and short-circuit protection. These characteristics are useful in industrial equipment, building controls, and instrumentation where cable length, grounding, and reflected signals can affect reliability.
The receiver operates across a -7 V to +12 V common-mode range, allowing the bus pins to tolerate significant differential signal offset without immediately losing receiver function. Up to 32 transceivers can share one bus according to the Analog Devices data sheet. The ADM483ARZ is specified from -40°C to +85°C, making it suitable for industrial temperature environments when the wider commercial operating range is insufficient.
Typical uses include RS-485 instrument buses, factory-floor controllers, remote sensor nodes, building automation equipment, and RS-422 links between a controller and a peripheral. In a half-duplex design, the driver and receiver paths share the same pair of bus conductors, so the DE and RE controls must be coordinated to avoid contention. The low 120 uA supply current also benefits compact systems where bus-node power consumption affects the overall power budget.
For implementation, follow the manufacturer’s recommended decoupling and termination arrangement. Place the supply capacitor close to VCC, connect the differential pair with tightly matched routing, and apply termination only where the cable topology requires it. Confirm driver-enable timing, bus-idle state, grounding strategy, and fault behavior before releasing the transceiver into a live multidrop network.
This product page combines the ADM483ARZ operating limits, interface behavior, package information, and application guidance with drop-in replacement analysis. The comparison table highlights electrical and mechanical trade-offs so engineers can select a replacement based on verified similarity rather than package name alone.
直接替换替代料： ADM483ARZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADM483ARZ （相同外形与封装尺寸） ——差异在于 Operating Temperature Range, Package, Supply Voltage.
ADM483JRZ
✅ 直接替换联系询价
查看数据手册 →MAX483ESA+
✅ 直接替换📋 参考替代料（不在目录中）
SP483EEN-L
✅ 直接替换📋 参考替代料（不在目录中）
ADM483ARZ 规格参数
| 电源电压 | 5 V |
| Maximum Data Rate | 250 kbps |
| Duplex Mode | Half-duplex |
| Supported Standards | EIA RS-485 and EIA RS-422 |
| Driver and Receiver Count | 1 differential driver and 1 differential receiver |
| 电源电流 | 120 uA |
| Shutdown Supply Current | 100 nA |
| Bus Common-Mode Range | -7 V to +12 V |
| Maximum Transceivers Per Bus | 32 transceivers |
| 工作温度范围 | -40°C to +85°C |
| Driver Output State | High impedance when disabled or powered off |
| Slew Rate | Slew-rate limited |
| Protection Features | Thermal shutdown and short-circuit protection |
| 封装 | 8-pin SOIC, 0.154 inch body width, 3.90 mm width |
| 安装类型 | Surface mount |
| Compliance Standards | EIA RS-485 and EIA RS-422 |
| 生命周期状态 | Production |
ADM483ARZ 8-pin soic, 0.154 inch body width, 3.90 mm width 引脚配置指南
ADM483ARZ（8-pin soic, 0.154 inch body width, 3.90 mm width 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： ADM483ARZ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADM483ARZ 适用于 6 应用s: Industrial RS-485 Sensor Bus, Building Automation Controller, RS-422 Point-to-Point Link, Factory Data-Acquisition Module, Remote Environmental Sensor Node, Security and Access-Control Network.
Industrial RS-485 Sensor Bus
The ADM483ARZ fits industrial sensor buses that distribute measurements from remote nodes to a central controller. Its 250 kbps maximum data rate is appropriate for moderate-bandwidth polling networks, while the -7 V to +12 V common-mode range provides tolerance for bus offsets in longer installations. The slew-rate-limited driver reduces high-frequency ringing and EMI on industrial cabling. With up to 32 transceivers allowed on a bus, the device can support distributed instrumentation when the wiring, termination, and grounding plan is designed correctly.
推荐
Building Automation Controller
The ADM483ARZ can connect a building automation controller to sensors, actuators, and lighting-control modules over a wired RS-485 network. The 5 V supply suits many embedded control boards, while low 120 uA supply current helps limit the energy burden of remote nodes. Its half-duplex operation reduces wiring by sharing a differential pair for transmission and reception. The -40°C to +85°C specification covers many indoor equipment environments, although enclosure temperature and system heat must remain within that range.
推荐
RS-422 Point-to-Point Link
The ADM483ARZ can implement an RS-422 point-to-point link between a controller and a remote peripheral when balanced differential signaling is preferred over single-ended logic. Its 250 kbps rate supports moderate-rate command, status, and configuration transfers, and the 5 V operation integrates with conventional embedded logic. The transceiver’s -7 V to +12 V common-mode range supports practical receiver tolerance on balanced lines. Firmware must still manage the half-duplex direction control used when the same interface occasionally transmits and receives.
推荐
Factory Data-Acquisition Module
A data-acquisition module can use the ADM483ARZ to connect measurement electronics to a plant controller over a multidrop RS-485 bus. The device handles both the differential driver and receiver functions required for half-duplex communication at up to 250 kbps. Slew-rate limiting is valuable around motors, relays, and long cables where faster edges can produce ringing and EMI. Short-circuit and thermal shutdown provide additional fault tolerance, while careful termination placement prevents excessive loading across the bus.
推荐
Remote Environmental Sensor Node
The ADM483ARZ suits remote environmental-monitoring nodes that report temperature, humidity, and air-quality measurements to a central host. The 250 kbps bus rate is more than adequate for periodic short telemetry frames, and low 120 uA supply current supports power-constrained installations. The 8-pin SOIC package simplifies compact board layouts. Because the interface is non-isolated, designers should assess ground-potential differences, cable surge exposure, and whether an isolated transceiver such as an ISO1042BDWR is required for field-grounded equipment.
推荐
Security and Access-Control Network
The ADM483ARZ can serve as the wired communication interface for access-control readers, door controllers, or alarm panels connected to a central system. Its differential signaling improves noise immunity compared with exposing single-ended logic directly to longer cables, and the 250 kbps rate is suitable for routine credential and status traffic. The -40°C to +85°C range accommodates many indoor and sheltered installations. Security equipment should also evaluate surge, isolation, and grounding requirements rather than relying on transceiver protection alone.
推荐
推荐产品汇总
工程参考数据： ADM483ARZ ——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 | ADM483JRZ | MAX483ESA+ | SP483EEN-L |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Maxim Integrated | Exar |
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Product Type | RS-485/RS-422 half-duplex transceiver | RS-485/RS-422 half-duplex transceiver | RS-485/RS-422 half-duplex transceiver | RS-485/RS-422 half-duplex transceiver |
| Maximum Data Rate | 250 kbps | 250 kbps | 250 kbps class | 250 kbps class |
| Supply Voltage | 5 V | 5 V | 5 V class | 5 V class |
关键差异点
- Documented low-power operating characteristics （对比 MAX483ESA+)
- Wide bus common-mode tolerance （对比 SP483EEN-L)
- Same-family production alternative （对比 ADM483JRZ)
- Production family with protected bus interface （对比 MAX483ESA+)
设计说明
Route the differential A and B conductors as a closely matched pair on the PCB, keeping the path over a continuous reference plane. Place the transceiver close to the connector or isolation barrier and minimize the distance from the bus pins to the protection network. Avoid splitting the pair around other high-speed traces, because trace imbalance can increase radiated emissions and reduce receiver margin on long or noisy installations.
Coordinate the DE and RE controls so that the driver is never enabled while another node transmits on the same bus. For half-duplex communication, add sufficient dead time between receive and transmit states to prevent output contention. Leave the receiver enabled when bus integrity is more important than reducing current, because a disabled receiver may not detect activity or faults on a distant node.
Use the ADM483’s controlled driver slew rate to limit high-frequency content on the bus. Apply termination resistors only at the physical ends of the bus when the cable length, topology, and signal rate call for it; adding termination at every node can overload the bus. Keep switching supplies and high-current return paths away from the bus pair, and use a solid ground reference with a deliberate chassis and signal-ground strategy.
Place the recommended supply capacitor between VCC and ground as close as practical to the transceiver pins. Keep the ground connection short and provide adequate return-current paths for the driver current. If the node must survive cable transients beyond the device’s stated -7 V to +12 V common-mode range, add an appropriately rated protection network and validate its capacitance and clamping behavior against the intended signaling rate.
合规信息
The product documentation identifies compliance with EIA RS-485 and EIA RS-422 standards. Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations are not stated in the cited product information.
