Overview
The ADM3202ARWZ, produced by Analog Devices Inc., is a high-speed, 2-channel RS-232/V.28 interface device. It operates from a single 3.3 V power supply, making it ideal for battery-powered portable instruments due to its low power consumption and shutdown facility. This transceiver conforms to the EIA-232E and CCITT V.28 specifications and supports data rates up to 460 kbps. The ADM3202ARWZ is part of the ADM3202/ADM3222/ADM1385 family, which are enhancements and improvements of the AD230 to AD241 family, offering plug-in compatibility and minimal differences in applications.
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 | 8 | mA | No load / RL = 3 kΩ to GND |
| Shutdown Supply Current | 0.01 | 0.5 | μA | ||
| Logic Input Threshold Low, VINL | 0.8 | V | TIN | ||
| Logic Input Threshold High, VINH | 2.0 | V | TIN | ||
| CMOS Output Voltage Low, VOL | 0.4 | V | IOUT = 1.6 mA | ||
| CMOS Output Voltage High, VOH | V | IOUT = -1.6 mA | |||
| Data Rate | 460 | kbps | |||
| Receiver Hysteresis | 400 | mV | |||
| Package Type | 16-SOIC (0.295, 7.50mm Width) |
Key Features
- Operates from a single 3.3 V power supply.
- Low power consumption with a shutdown facility, ideal for battery-powered portable instruments.
- Conforms to EIA-232E and CCITT V.28 specifications.
- Supports data rates up to 460 kbps.
- Uses four external 0.1 μF charge pump capacitors for voltage doubler/inverter.
- ESD protection to IEC 1000-4-2 (801.2) on RS-232 pins (ADM3202 only): ±8 kV contact discharge, ±15 kV air gap discharge.
- Internal 5 kΩ pull-down resistors on each RS-232 input.
- Schmitt-trigger inputs with a hysteresis level of 0.4 V for error-free reception.
- Available in various packages including PDIP, SOIC_N, SOIC_W, SSOP, and TSSOP.
Applications
- General-purpose RS-232 data links.
- Portable instruments.
- Printers.
- Palmtop computers and PDAs.
Q & A
- What is the operating voltage range of the ADM3202ARWZ?
The operating voltage range is 3.0 V to 5.5 V, with a typical value of 3.3 V.
- What is the maximum data rate supported by the ADM3202ARWZ?
The ADM3202ARWZ supports data rates up to 460 kbps.
- What type of ESD protection does the ADM3202ARWZ offer?
The ADM3202ARWZ 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 ADM3202ARWZ?
The ADM3202ARWZ is available in 16-lead PDIP, SOIC_N, SOIC_W, and TSSOP packages.
- How does the shutdown facility work on the ADM3202ARWZ?
The shutdown facility, available on the ADM3222 and ADM1385, allows the charge pump to be shut down and the transmitter outputs to be disabled, reducing the quiescent current to less than 0.5 μA.
- What is the purpose of the charge pump capacitors in the ADM3202ARWZ?
The charge pump capacitors (four external 0.1 μF capacitors) are used for the voltage doubler/inverter, allowing operation from a single 3.3 V supply.
- What is the logic input threshold for the ADM3202ARWZ?
The logic input threshold low (VINL) is 0.8 V, and the logic input threshold high (VINH) is 2.0 V.
- Does the ADM3202ARWZ have internal pull-down resistors?
Yes, the ADM3202ARWZ has internal 5 kΩ pull-down resistors on each RS-232 input.
- What is the receiver hysteresis level of the ADM3202ARWZ?
The receiver hysteresis level is 0.4 V, ensuring error-free reception for noisy inputs and inputs with slow transition times.
- Is the ADM3202ARWZ suitable for high-speed data transmission?
Yes, the ADM3202ARWZ features high slew rates, permitting data transmission at rates well in excess of the EIA/RS-232E specifications, up to 460 kbps.
