ADM483JR - 250kbps Low-Power RS-485/RS-422 IC | Analog Devices
料号： ADM483JR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.03 | $1.03 |
| 10 | $0.95 | $9.50 |
| 100 | $0.85 | $85.00 |
| 500 | $0.75 | $375.00 |
| 1,000 | $0.68 | $680.00 |
ADM483JR 概述
An RS-485/RS-422 transceiver is an interface IC that converts logic-level signals into balanced differential signals for reliable communication over longer cables and noisy environments. The ADM483 combines a differential line driver, differential receiver, and driver-enable control in one package. It sits within the hierarchy of interface IC, communications transceiver, differential line driver and receiver, and semiconductor. Its differential signaling improves noise immunity while supporting half-duplex operation on multipoint buses.
The device supports EIA RS-485 and RS-422 operation, data rates to 250 kbps, and as many as 32 transceivers on one bus. Slew-rate limiting reduces electromagnetic interference, while high-impedance outputs when disabled or powered off help prevent bus contention. Thermal shutdown and short-circuit protection improve robustness, and the specified operating-temperature range is -40°C to +85°C.
The ADM483 architecture supports low-power communication links where a lower data rate is acceptable and reduced switching activity is valuable. Its 120 µA supply current is suitable for low-power instrumentation and control links, while the 100 nA shutdown current supports power-sensitive systems. The 8-lead SOIC format supports conventional surface-mount assembly and easy transition from through-hole prototype boards to compact production designs.
Typical uses include industrial control networks, building-automation equipment, instrumentation, low-speed data acquisition, and RS-485/RS-422 links between distributed modules. The device is particularly appropriate where low EMI, low standby consumption, and a moderate 250 kbps data rate are more important than maximum throughput. It is not intended as a substitute for a high-speed RS-485 transceiver when the application requires data rates above its stated limit.
Designers should verify termination, biasing, protection, and grounding in the completed bus. Place the transceiver near the connector, provide a continuous ground reference, and use appropriate surge protection when cables leave the board. The 8-pin SOIC footprint allows straightforward layout, but input and output filtering should be evaluated alongside cable length and external transients.
This page combines the verified ADM483 family specifications, sourcing links, practical design guidance, and same-package alternatives to help engineers evaluate a 250 kbps low-power RS-485/RS-422 transceiver.
直接替换替代料： ADM483JR ——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： ADM483JR （相同外形与封装尺寸） ——差异在于 Data Rate, Operating Temperature Range, Package, Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
MAX483
✅ 直接替换📋 参考替代料（不在目录中）
ADM487EARZ-REEL7
✅ 直接替换📋 参考替代料（不在目录中）
ADM485ARZ
✅ 直接替换✓ 有现货
$1.62 / 个
查看数据手册 →ADM4850ARZ
✅ 直接替换📋 参考替代料（不在目录中）
LTC1483IS8#PBF
✅ 直接替换📋 参考替代料（不在目录中）
ADM483JR 规格参数
| Product Type | Low-power differential line transceiver |
| 电源电压 | 5 V |
| 数据速率 | Up to 250 kbps |
| Communication Standard | EIA RS-485/RS-422 compliant |
| Operating Mode | Half-duplex |
| Typical Operating Supply Current | 120 µA |
| Shutdown Supply Current | 100 nA |
| Bus Common-Mode Range | -7 V to +12 V |
| Maximum Transceivers on One Bus | 32 transceivers |
| Output State When Disabled or Powered Off | High impedance |
| Slew Rate | Limited for low EMI |
| Protection | Thermal shutdown and short-circuit protection |
| Pin Compatibility | Pin-compatible with MAX483 |
| 工作温度范围 | -40°C to +85°C |
| 封装 | 8-lead SOIC, 3.90 mm width |
| 安装类型 | Surface mount |
ADM483JR 引脚配置
| 引脚 1 | RO — Receiver output |
| 引脚 2 | RE — Receiver enable input |
| 引脚 3 | DE — Driver enable input |
| 引脚 4 | DI — Driver input |
| 引脚 5 | GND — Ground |
| 引脚 6 | A — Noninverting bus terminal |
| 引脚 7 | B — Inverting bus terminal |
| 引脚 8 | VCC — Positive supply |
典型应用
ADM483JR 适用于 6 应用s: Industrial Control Networks, Building Automation, Instrumentation and Data Acquisition, Security and Access Systems, Environmental Monitoring, Embedded Communication Ports.
Industrial Control Networks
The ADM483JR fits low-speed industrial control links that use balanced differential signaling across factory equipment or building systems. Its 250 kbps maximum data rate is appropriate for supervisory commands, sensor status, actuator control, and configuration traffic rather than high-bandwidth motion or video data. Slew-rate limiting reduces EMI, while the -7 V to +12 V bus common-mode range provides useful tolerance for grounded industrial cabling. Designers should still validate surge protection, grounding, cable termination, and fail-safe biasing.
推荐
Building Automation
For building-automation equipment, the ADM483JR can connect controllers, sensors, and distributed I/O modules over an RS-485 or RS-422-compatible link. The 120 µA typical operating supply current and 100 nA shutdown current help when devices spend substantial time idle, while low-EMI slew-rate control supports reliable operation in buildings containing sensitive controls and communications equipment. Because building cables can be long and cross between floors, use proper grounding, termination, bias resistors, and transient protection.
推荐
Instrumentation and Data Acquisition
The ADM483JR is suitable for connecting instrumentation and data-acquisition modules when the required link rate is 250 kbps or lower. Differential RS-422/RS-485 signaling helps preserve measurement integrity when the transceiver is connected to sensors or test equipment through cables outside a controlled enclosure. The family’s low operating current and shutdown current reduce system overhead, while thermal shutdown and short-circuit protection improve robustness. Confirm grounding and isolation requirements before connecting sensitive measurement nodes.
推荐
Security and Access Systems
The ADM483JR can serve as a low-speed communications interface in access-control panels, alarm systems, and distributed security equipment. The 5 V supply and low-power operating characteristics suit compact embedded controller boards, while the half-duplex arrangement allows a single pair of differential conductors to support command and response traffic. Security installations often use cables that leave the controlled enclosure, so external surge protection, robust grounding, and verified bus termination are as important as the transceiver selection itself.
推荐
Environmental Monitoring
The ADM483JR is appropriate for low-rate environmental-monitoring networks that distribute temperature, humidity, air-quality, or equipment-status measurements over a wired bus. Its 120 µA typical supply current is helpful when remote nodes rely on limited power budgets, and the specified -40°C to +85°C operating range supports industrial environments. The link should remain below 250 kbps, with cable length, topology, and termination selected for the intended installation. Field-side protection is strongly recommended for exposed sensor wiring.
推荐
Embedded Communication Ports
The ADM483JR can add a wired differential communication port to a controller, sensor hub, or service module. Its half-duplex architecture uses the bus efficiently for request-response traffic, and the 250 kbps limit is well matched to firmware updates, configuration exchange, diagnostics, and status polling. Compared with a higher-speed transceiver, the slew-rate-limited ADM483 can simplify EMI control in mixed-signal embedded products. The host controller must still handle bus arbitration, timeout handling, and fault-safe biasing.
推荐
推荐产品汇总
工程参考数据： ADM483JR ——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 | MAX483 | ADM487EARZ-REEL7 | ADM485ARZ | ADM4850ARZ | LTC1483IS8#PBF |
|---|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 - pin-compatible | SOIC-8 - same footprint | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | Analog Devices | Maxim Integrated | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
关键差异点
- Low-power operating profile （对比 MAX483)
- Low-EMI transition behavior （对比 MAX483)
- Moderate-speed bus support （对比 ADM483ARZ)
- Multipoint bus capacity （对比 LTC1483IS8#PBF)
设计说明
Place the ADM483JR close to the RS-485/RS-422 connector and route the A and B differential pair as a tightly coupled pair. Keep the ground reference continuous between the transceiver and connector, avoid long unprotected stubs, and place termination components at physically appropriate bus ends. This layout reduces susceptibility to external noise and helps preserve the benefit of the slew-rate-limited driver.
Do not treat the -7 V to +12 V bus common-mode range as a substitute for surge protection. When cables leave an enclosure, evaluate the required transient withstand, add appropriately rated protection, and verify that the protection device does not distort normal bus signals. Also confirm that fail-safe biasing is present when the bus can be disconnected or when multiple drivers are not active.
Decouple the 5 V supply close to the VCC and GND pins using the capacitance and placement recommended by the manufacturer datasheet. Keep switching or high-current return paths away from the receiver and connector return. Although the verified family specification lists 120 µA typical operating current and 100 nA shutdown current, external pull resistors, protection components, and other board loads can dominate the final power budget.
合规信息
The retrieved web results do not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements for ADM483JR. The product is listed by Analog Devices as production, but that status is not a compliance qualification.
