Overview
The ADM3222ARUZ-REEL7, produced by Analog Devices Inc., is a high-speed, 2-channel RS-232/V.28 interface device. This transceiver operates from a single 3.3 V power supply, making it ideal for battery-powered portable instruments. It is designed to maintain RS-232 voltage levels while operating at low power consumption, utilizing CMOS technology to minimize power dissipation. The device is an enhancement of the AD230 to AD241 family and is essentially plug-in compatible with these predecessors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 3.3 | V |
| Maximum Data Rate | 460 | kbps |
| Transmitter Output Voltage | ±6 | V |
| Receiver Input Voltage Range | ±30 | V |
| Transmitter Propagation Delay | 0.3 - 1.2 | μs |
| Receiver Propagation Delay | 0.4 - 1 | μs |
| Operating Temperature Range | -40 to +85 | °C |
| Package Type | 20-Lead Thin Shrink Small Outline Package (TSSOP) |
Key Features
- High-speed data transmission up to 460 kbps, exceeding EIA/RS-232E specifications.
- Single 3.3 V power supply operation with low power consumption.
- Internal charge pump voltage converter for generating RS-232 voltage levels.
- CMOS technology for minimal power dissipation, suitable for battery-powered devices.
- Receiver enable and shutdown control (ADM3222 only).
- ESD protection on RS-232 pins (ADM3202 only), up to ±8 kV contact discharge and ±15 kV air gap discharge.
- Schmitt-trigger inputs with a hysteresis level of 0.4 V for error-free reception.
- Internal 5 kΩ pull-down resistors on each RS-232 input.
Applications
- General-purpose RS-232 data links.
- Portable instruments.
- Printers and palmtop computers.
- PDAs and other handheld devices.
- ISDN modem standards requiring high data rates.
Q & A
- What is the maximum data rate supported by the ADM3222ARUZ-REEL7?
The ADM3222ARUZ-REEL7 supports data rates up to 460 kbps.
- What is the operating voltage of the ADM3222ARUZ-REEL7?
The device operates from a single 3.3 V power supply.
- What type of package does the ADM3222ARUZ-REEL7 come in?
The device is packaged in a 20-Lead Thin Shrink Small Outline Package (TSSOP).
- What is the operating temperature range of the ADM3222ARUZ-REEL7?
The operating temperature range is -40°C to +85°C.
- Does the ADM3222ARUZ-REEL7 have ESD protection?
Yes, the ADM3202 version of this family has ESD protection up to ±8 kV contact discharge and ±15 kV air gap discharge on RS-232 pins.
- How does the receiver section of the ADM3222ARUZ-REEL7 handle input voltages?
The receiver section has Schmitt-trigger inputs with a hysteresis level of 0.4 V and internal 5 kΩ pull-down resistors to ground, protecting against overvoltages up to ±30 V.
- What is the purpose of the charge pump voltage converter in the ADM3222ARUZ-REEL7?
The charge pump voltage converter generates the necessary RS-232 voltage levels while operating from a single 3.3 V supply.
- Can the ADM3222ARUZ-REEL7 be used in battery-powered devices?
Yes, it is suitable for battery-powered devices due to its low power consumption and CMOS technology.
- What are the key differences between the ADM3222 and ADM1385 models?
The ADM3222 has additional enable and shutdown circuitry, while the ADM1385 has different shutdown and driver disable controls.
- How do the transmitters and receivers in the ADM3222ARUZ-REEL7 handle signal levels?
The transmitters convert 3.3 V logic levels to RS-232 signal levels, and the receivers convert RS-232 signal levels back to 3 V logic output levels.
