ADM211EAR - 5V RS-232 Transceiver, 28-SOIC | Analog Devices
MPN： ADM211EAR ✓ 啟用中ADM211EAR 概覽
An RS-232 transceiver is an interface integrated circuit that combines line drivers and receivers with the electrical conversion required for balanced-looking differential signaling over single-ended, bipolar RS-232 connections. The ADM2xxE family is positioned as a robust RS-232 and V.28 interface solution, with onboard charge-pump support and external 0.1 uF capacitors used for the RS-232 interface voltage generation.
The ADM211EAR provides four RS-232 drivers and five receivers, allowing multiple channels and a full-duplex communications arrangement in one package. The manufacturer describes the ADM211 as a production part with a 200 kbps data rate, while the related ADM211E family is described as supporting rates up to 230 kbps. The device also provides shutdown and enable control functions in relevant family members, making it useful for systems that need controlled power states or interface isolation.
Key application areas include industrial data acquisition, test and measurement equipment, POS terminals, industrial controls, and embedded systems communicating with legacy RS-232 peripherals. The +5 V supply requirement simplifies system design where the logic supply is already present and a separate ±12 V RS-232 supply is not practical. External charge-pump capacitors should be placed close to the relevant pins, and the receiver inputs should be protected from electrostatic discharge and excessive voltage excursions.
When selecting this device, verify the exact driver and receiver count, enable and shutdown behavior, package suffix, and operating-temperature requirements against the Analog Devices ADM211 datasheet Rev. D. The 28-SOIC package is intended for conventional PCB assembly and offers a larger pin count than compact RS-232 interface packages. The ADM211EAR is therefore appropriate when a design needs several RS-232 channels from one +5 V supply and a standard SOIC footprint.
直接替換替代品，適用於 ADM211EAR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
ADM211EARSZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADM213EARSZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADM211EAR 規格
| Product Type | RS-232 and V.28 interface transceiver |
| 供應電壓 | +5 V |
| Driver Count | 4 |
| Receiver Count | 5 |
| ADM211 Data Rate | 200 kbps |
| ADM211E Family Data Rate | Up to 230 kbps |
| Charge Pump Capacitor | 0.1 uF |
| Receiver Input Levels | Up to 30 V |
| RS-232 Output Swing | 9 V |
| 封裝 | 28-pin SOIC |
| 安裝類型 | Surface mount |
| Communication Standard | EIA-232-E and CCITT V.28 |
| ESD Protection | +/-15 kV |
| Power | 15 mW |
| Supplier Part Number | ADM211EAR |
ADM211EAR 28-pin soic 腳位配置指南
ADM211EAR（28-pin soic 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： ADM211EAR.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADM211EAR 適用於 6 應用s: Industrial Data Acquisition, Point-of-Sale Terminal Interface, Test and Measurement Equipment, Embedded Controller Communications, Industrial Control Panel, Service and Diagnostic Port.
Industrial Data Acquisition
The ADM211EAR is suitable for industrial measurement systems that must collect data from several RS-232 instruments while operating from a single +5 V rail. Its four drivers and five receivers allow multiple instrument or peripheral lines to be consolidated into one interface IC. The ADM211 family’s 200 kbps rate is appropriate for supervisory, configuration, and legacy instrumentation traffic rather than high-bandwidth streaming. Place the 0.1 uF charge-pump capacitors near their pins, route driver outputs to the connector through the recommended protection network, and keep receiver traces away from switching nodes to avoid coupling noise into low-level inputs.
推薦
Point-of-Sale Terminal Interface
The ADM211EAR can support point-of-sale and retail peripherals that retain an RS-232 service or peripheral interface. The 4/5 channel arrangement is useful when a terminal communicates with more than one serial device while the rest of the controller runs from +5 V logic. The interface’s 200 kbps capability comfortably handles transaction traffic, configuration exchanges, and status reporting. Keep the external charge-pump network compact, provide a stable +5 V source, and confirm the connector’s RS-232 voltage levels and ESD exposure before deploying the board in a retail environment.
推薦
Test and Measurement Equipment
The ADM211EAR fits laboratory and field-test equipment that must communicate with older RS-232 instruments, printers, or calibration devices. Multiple drivers and receivers can reduce the number of separate interface components, while the single +5 V operating requirement simplifies portable and benchtop instrument power systems. The interface is most appropriate for control and measurement traffic within the ADM211 family’s 200 kbps capability. Use short, properly terminated charge-pump connections, isolate connector grounds where appropriate, and validate receiver thresholds against the attached equipment before production testing.
推薦
Embedded Controller Communications
The ADM211EAR provides a practical RS-232 bridge for embedded controllers that must retain compatibility with service ports, programming fixtures, or legacy peripherals. Because the device runs from +5 V, it can share the controller’s logic supply without requiring a separate RS-232 voltage source. The five receivers and four drivers offer flexible channel allocation for command and response paths. Designers should verify the controller’s UART logic levels, provide the manufacturer-specified charge-pump capacitors, and keep the RS-232 driver outputs physically separated from sensitive receiver and clock traces.
推薦
Industrial Control Panel
The ADM211EAR is appropriate for control panels that interface with RS-232 programmable controllers, displays, or service adapters from a +5 V control board. Its channel count supports several communication endpoints without requiring one transceiver per port. The single-supply architecture is particularly useful in compact control electronics where space and rail count are constrained. Maintain the specified 0.1 uF charge-pump capacitor placement, provide local supply bypassing, and use an appropriate protection scheme on externally accessible connector pins to improve system reliability under industrial ESD and noise conditions.
推薦
Service and Diagnostic Port
The ADM211EAR can serve as a service-port interface for diagnostics, firmware loading, and configuration access in equipment that retains legacy RS-232 connectivity. The four-driver configuration permits multiple management lines, while the receiver channels support incoming status and command signals. A single +5 V supply reduces the complexity of service-port circuitry in embedded products. Design the connector entry with suitable ESD protection, maintain controlled return paths for RS-232 signals, and avoid treating the on-board transceiver as a complete substitute for a dedicated surge-protection network.
推薦
推薦產品摘要
工程參考資料，適用於 ADM211EAR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ADM211EARSZ | ADM213EARSZ |
|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-pin SOIC | 28-pin SOIC | 28-pin SOIC |
| Product Type | RS-232 and V.28 transceiver | RS-232 and V.28 transceiver | RS-232 transceiver |
| Supply Voltage | +5 V | +5 V | +5 V |
| Driver Count | 4 | 4 | 4 |
| Receiver Count | 5 | 5 | 5 |
主要差異化特點
- Identical core device configuration (對比ADM211EARSZ)
- Direct ordering-form interchange (對比ADM211EARSZ)
- Related family option with receiver-behavior qualification required (對比ADM213EARSZ)
設計說明
Place the ADM211 family’s specified 0.1 uF charge-pump capacitors close to the associated device pins and follow the manufacturer’s polarity markings. Keep the high-current charge-pump loop compact, provide local supply decoupling at the +5 V pins, and avoid routing sensitive receiver inputs beneath or immediately beside the charge-pump nodes. This layout approach limits switching ripple and reduces the chance that the transceiver’s own generated noise will degrade adjacent low-level measurements.
Do not treat the ADM211EAR as a 5 V logic-level RS-232 driver. The transmitter side must produce the bipolar signal levels defined by RS-232, while the receiver side is designed for the wider voltage range associated with the interface. Verify the complete connector-side circuit, grounding arrangement, and external protection devices rather than assuming that the +5 V supply can connect directly to an RS-232 connector.
The ADM211 family contains a charge-pump converter, so PCB layout and connector cable arrangements can influence radiated emissions. Keep the charge-pump capacitor loop small, maintain a low-impedance return path for supply current, and avoid extending unprotected RS-232 traces unnecessarily across the board. At an externally accessible connector, use the protection approach specified by the manufacturer and validate the finished product with the system’s applicable EMC procedure.
合規資訊
The ADM211EAR documentation identifies EIA-232-E and V.28 interface compliance and ±15 kV ESD protection. Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals statements were not confirmed.
