Overview
The ADM3311EACPZ-REEL, produced by Analog Devices Inc., is a ruggedized RS-232 line driver/receiver integrated circuit. This device is designed to fully meet the EIA-232 standard while operating from a single power supply of 2.7 V to 3.6 V. It features an on-board charge pump dc-to-dc converter, eliminating the need for dual power supplies. The ADM3311E is particularly suited for battery-powered portable devices and harsh electrical environments due to its low power consumption and robust ESD protection.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Maximum Data Rate | 250 kbps | 460 kbps | 920 kbps | RL = 3 kΩ to 7 kΩ, CL = 50 pF to 1000 pF, VCC = 3.0 V | |
| Receiver Propagation Delay (TPHL, TPLH) | 0.3 µs | 1 µs | CL = 150 pF | ||
| Receiver Output Enable Time (tER) | 100 ns | ||||
| Receiver Output Disable Time (tDR) | 300 ns | ||||
| Transmitter Propagation Delay (TPHL, TPLH) | 500 ns | RL = 3 kΩ, CL = 1000 pF | |||
| Transition Region Slew Rate | 3 V/µs | 18 V/µs | |||
| Power Supply Voltage | 2.7 V | 3.6 V | V | ||
| ESD Protection | ±15 kV | IEC 1000-4-2 on RS-232 I/Os and CMOS I/Os | |||
| Package Type | 32-lead LFCSP_WQ, 28-lead TSSOP, 28-lead SSOP |
Key Features
- Low Power Consumption: The device operates in Green Idle mode, minimizing power consumption by gating the charge pump oscillator on and off to maintain the output voltage under varying load conditions.
- High Transmission Rates: Supports data rates up to 460 kbps.
- ESD Protection: Offers ESD protection up to ±15 kV on RS-232 and CMOS I/O lines.
- Shutdown Facility: A shutdown feature reduces power consumption to less than 1 µA, with one receiver remaining active to monitor peripheral devices.
- Single Supply Operation: Operates from a single 2.7 V to 3.6 V power supply, eliminating the need for dual power supplies.
- Robust Design: Includes overvoltage protection and latch-up immunity, making it suitable for harsh electrical environments.
Applications
- Mobile phone handsets and data cables
- Laptop and notebook computers
- Printers and peripherals
- Modems
- PDAs, hand-held devices, and palmtop computers
- Automotive applications
Q & A
- What is the maximum data rate supported by the ADM3311E?
The ADM3311E supports a maximum data rate of up to 460 kbps. - What is the operating voltage range of the ADM3311E?
The device operates from a single power supply of 2.7 V to 3.6 V. - What type of ESD protection does the ADM3311E offer?
The ADM3311E offers ESD protection up to ±15 kV on RS-232 and CMOS I/O lines. - What is the power consumption in shutdown mode?
In shutdown mode, the power consumption is reduced to less than 1 µA. - Does the ADM3311E support Green Idle operation?
Yes, the device operates in Green Idle mode to minimize power consumption. - What are the available package types for the ADM3311E?
The ADM3311E is available in 32-lead LFCSP_WQ, 28-lead TSSOP, and 28-lead SSOP packages. - Is the ADM3311E suitable for automotive applications?
Yes, the device is qualified for automotive applications. - How many drivers and receivers does the ADM3311E have?
The ADM3311E is a three driver/five receiver product. - What is the purpose of the on-board charge pump dc-to-dc converter?
The on-board charge pump dc-to-dc converter generates positive and negative supplies from the input 3 V power supply, eliminating the need for dual power supplies. - Does the ADM3311E have any internal pull-up or pull-down resistors?
Yes, the device has internal 400 kΩ pull-up resistors on CMOS inputs and internal 5 kΩ pull-down resistors on RS-232 inputs.
