Overview
The ADM3202ARUZ is a low-power, dual-channel RS-232/V.28 interface transceiver from Analog Devices (ADI) for level conversion between the logic-level interface of a microcontroller or processor and RS-232 serial communication devices. The device integrates two line drivers and two receivers, and employs a charge pump circuit to generate the positive and negative voltages required for RS-232 communication from a single low-voltage supply.
The main feature of this device is that it supports… The system features a 3.3V power supply, dual transmit/receive channels, and an external small-capacity charge pump capacitor . It eliminates the need for separate positive and negative power supplies, enabling signal level conversion required by the standard RS-232 interface and simplifying serial communication circuitry in embedded devices .
Core parameters
| Parameter | ADM3202ARUZ |
| Manufacturer | Analog Devices |
| Device type | RS-232 line driver/receiver |
| Communication Protocol | RS-232 / V.28 |
| Number of drives | Route 2 |
| Number of receivers | Route 2 |
| Power supply voltage | 3.0V–5.5V (Distributor-listed range) |
| Main power supply specifications | 3.3V |
| Data rate | Up to 460kbps (as stated on the product page) |
| Charge pump capacitor | Four external 0.1µF capacitors |
| Operating temperature | -40°C to +85°C |
| Packaging | 16-pin TSSOP |
| Installation method | Surface Mount |
Note: Data rate may be affected by test conditions and communication link load; actual designs should verify the complete test conditions in the official datasheet. Power supply voltage range and ESD rating should also be based on the corresponding version of the datasheet.
Features
1. Dual-driver and dual-receiver architecture
The ADM3202ARUZ integrates two RS-232 drivers and two receivers, enabling bidirectional serial signal level conversion within the same device.
2. Supports 3.3V logic systems
The ADM3202 is primarily designed for 3.3V single-supply systems. For devices employing 3.3V MCUs, processors, or embedded controllers, this device can be used to perform signal conversion between the logic side and the RS-232 line.
3. Integrated charge pump voltage conversion
The signal levels used by the RS-232 interface are different from the logic levels of ordinary MCUs. The ADM3202 integrates a charge pump, which uses an external capacitor to perform voltage multiplication and inversion, generating the positive and negative voltages required to drive the circuit from a single power supply.
4. Compatible with RS-232/V.28 interface standards
The ADM3202 is designed for RS-232/V.28 serial communication applications and complies with relevant EIA-232E electrical interface requirements. This type of interface is commonly found in traditional serial devices, industrial instruments, communication modules, and some embedded maintenance interfaces.
Typical application scenarios
Industrial control and equipment maintenance interface
The ADM3202ARUZ can be used as an RS-232 maintenance interface for controllers, PLC peripheral modules, and industrial equipment, supporting device configuration, parameter reading, debugging, and diagnostic data communication.
Instruments and Meters
Test equipment, data loggers, and measuring instruments can exchange measurement results, configuration parameters, or equipment status information with a host computer via an RS-232 interface. The dual-driver and dual-receiver architecture can meet common full-duplex serial communication requirements.
Printers and traditional serial port devices
This device is suitable for connecting to printers, data terminals, and traditional computing devices that use an RS-232 interface. Specific application requirements need to be confirmed regarding the external device’s interface definition, baud rate, and connector pin mapping.
Embedded system serial port conversion
When the MCU or processor only provides UART logic levels, but external devices require standard RS-232 signals, the ADM3202ARUZ can be used to perform physical layer conversion.
Comparative Advantage Analysis
| Design Dimensions | ADM3202ARUZ Features | Impact on system design |
| Number of channels | 2-channel driver, 2-channel receiver | Supports common full-duplex serial communication |
| Logic side power supply | The main specification is 3.3V. | Suitable for low-voltage MCU systems |
| Power architecture | Integrated charge pump | No separate RS-232 positive and negative power supply required |
| external capacitor | Four 0.1µF capacitors | Peripheral component configuration is clear |
| Communication Standards | RS-232/V.28 | Suitable for standard serial interfaces |
| Data rate | Maximum nominal 460kbps | Suitable for various serial port data transmission tasks |
| ESD capability | External interfaces have the specified level of protection. | Improve the electrostatic discharge tolerance of the interface |
| Packaging | 16-pin TSSOP | Suitable for compact PCB design |
| Operating temperature | -40°C to +85°C | Covering common industrial and commercial environments |
Manufacturer Profile
Analog Devices (ADI) is an analog and mixed-signal semiconductor manufacturer whose products include data converters, amplifiers, power management, sensors, clocks, and interface devices.
The ADM3202 belongs to their RS-232 interface product family and is primarily used for electrical interface conversion between low-voltage digital control systems and standard serial communication lines. This series integrates a driver, receiver, and charge pump, reducing the need for external power supply circuitry.
Why choose ADM3202ARUZ?
For designs requiring 3.3V power supply, dual-channel RS-232 transceiver and compact surface-mount package, the ADM3202ARUZ provides complete line drive, receive and charge pump functionality in a single device.
When selecting a model, key considerations should be made regarding the interface protocol, data rate, external cable conditions, logic-side power supply, external charge pump capacitor, and connector ESD requirements. If the original design used the ADM3202ARUZ, the replacement model also requires verification of the number of drivers and receivers, pin definitions, package size, charge pump capacitor requirements, and logic electrical characteristics.
Frequently Asked Questions (FAQ)
Q1: What is the ADM3202ARUZ device?
It is an RS-232/V.28 dual-channel line driver and receiver that integrates two drivers, two receivers, and a charge pump.
Q2: Can the ADM3202ARUZ be powered by 3.3V?
Yes. The main operating specifications of this device are for a 3.3V single-supply system; the specific power supply range should be found in the datasheet.
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