Overview
The ADM3202ARNZ-REEL, produced by Analog Devices Inc., is a high-speed, 2-channel RS-232/V.28 interface transceiver. This device operates from a single 3.3 V power supply, making it suitable for a variety of applications, especially in battery-powered portable instruments. The ADM3202 is designed to meet EIA-232E and CCITT V.28 specifications and supports data rates up to 460 kbps. It features low power consumption and includes a shutdown facility to further reduce power usage, enhancing battery life in portable devices.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Voltage Range | 3.0 | 3.3 | 5.5 | V | VCC |
| Power Supply Current | 1.3 | 3 | 12 | mA | No load, RL = 3 kΩ to GND |
| Shutdown Supply Current | 0.01 | 0.5 | μA | ||
| Logic Input Threshold Low, VINL | 0.8 | V | |||
| Logic Input Threshold High, VINH | 2.0 | V | |||
| CMOS Output Voltage Low, VOL | 0.4 | V | IOUT = 1.6 mA | ||
| CMOS Output Voltage High, VOH | ±2 | V | VOUT = ±2 V | ||
| RS-232 Output Short-Circuit Current | ±15 | mA | |||
| Maximum Data Rate | 460 | kbps | VCC = 3.3 V, RL = 3 kΩ to 7 kΩ, CL = 50 pF to 1000 pF | ||
| Transmitter Propagation Delay | 0.3 | 1.2 | μs | RL = 3 kΩ, CL = 1000 pF | |
| Receiver Propagation Delay TPHL | 0.4 | 1 | μs | ||
| Receiver Output Enable Time | 200 | ns | |||
| Receiver Output Disable Time | 200 | ns |
Key Features
- Operates from a single 3.3 V power supply.
- Meets EIA-232E and CCITT V.28 specifications.
- Supports data rates up to 460 kbps.
- Low power consumption with shutdown facility to reduce power usage.
- Uses four external 0.1 μF charge pump capacitors for voltage doubler/inverter.
- CMOS technology for minimal power dissipation.
- ESD protection to IEC 1000-4-2 (801.2) on RS-232 pins.
- Schmitt-trigger inputs with a hysteresis level of 0.4 V for error-free reception.
- Available in various package options including PDIP, SOIC_N, SOIC_W, SSOP, and TSSOP.
Applications
- General-purpose RS-232 data links.
- Portable instruments.
- Printers.
- Palmtop computers and PDAs.
- ISDN modem standards requiring high data rates.
Q & A
- What is the operating voltage range of the ADM3202?
The ADM3202 operates within a voltage range of 3.0 V to 5.5 V, with a typical voltage of 3.3 V. - What is the maximum data rate supported by the ADM3202?
The ADM3202 supports data rates up to 460 kbps. - What type of protection does the ADM3202 offer against ESD?
The ADM3202 offers ESD protection to IEC 1000-4-2 (801.2) on RS-232 pins, with ±8 kV contact discharge and ±15 kV air gap discharge. - What are the package options available for the ADM3202?
The ADM3202 is available in PDIP, SOIC_N, SOIC_W, SSOP, and TSSOP packages. - How does the shutdown facility in the ADM3222 and ADM1385 work?
The shutdown facility in the ADM3222 and ADM1385 reduces the quiescent current to less than 0.5 μA by powering down the charge pump and transmitter outputs, while the receivers remain enabled unless disabled using the EN input. - What is the purpose of the charge pump capacitors in the ADM3202?
The charge pump capacitors (four external 0.1 μF capacitors) are used for the voltage doubler/inverter, allowing the device to operate from a single 3.3 V supply. - What are the typical applications of the ADM3202?
The ADM3202 is typically used in general-purpose RS-232 data links, portable instruments, printers, palmtop computers, and PDAs. - Does the ADM3202 support high baud rates?
Yes, the ADM3202 features high slew rates, permitting data transmission at rates well in excess of the EIA/RS-232E specifications. - How does the CMOS technology in the ADM3202 benefit its operation?
The CMOS technology used in the ADM3202 keeps power dissipation to a minimum, allowing for maximum battery life in portable applications. - What is the significance of Schmitt-trigger inputs in the ADM3202?
The Schmitt-trigger inputs with a hysteresis level of 0.4 V ensure error-free reception for both noisy inputs and inputs with slow transition times.
