Overview
The ADM3311EARUZ-REEL is a high-speed RS-232 transceiver produced by Analog Devices Inc. This device is part of the ADM3307E/ADM3310E/ADM3311E/ADM3312E/ADM3315E family, designed to fully meet the EIA-232 standard while operating from a single 2.7 V to 3.6 V power supply. It features three drivers and five receivers, making it suitable for various communication applications. The device includes an on-board charge pump dc-to-dc converter, which eliminates the need for dual power supplies and operates in Green Idle™ mode to minimize power consumption.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltage | 2.7 | - | 3.6 | V | - |
| Maximum Data Rate | 250 | 460 | 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 | 0.17 | 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 | - | 18 | V/µs | - |
| ESD Protection | - | - | ±15 kV | - | IEC 1000-4-2 on RS-232 I/Os and CMOS I/Os (ADM3307E) |
| Package Type | - | - | - | - | 28-lead TSSOP, 28-lead SSOP |
Key Features
- RS-232 Compliance: Fully meets the EIA-232 standard with a single 2.7 V to 3.6 V power supply.
- High-Speed Data Rate: Supports data rates up to 460 kbps.
- Low Power Consumption: Features Green Idle operation to minimize power consumption, with a shutdown mode that reduces quiescent current to less than 1 µA.
- ESD Protection: Offers ESD protection up to ±15 kV on RS-232 and CMOS I/Os.
- On-Board Charge Pump: Includes a dc-to-dc converter with a voltage tripler and inverter to generate positive and negative supplies from the input power supply.
- Shutdown Facility: Allows one receiver to remain active during shutdown, enabling monitoring of peripheral devices.
- Multiple Package Options: Available in 28-lead TSSOP and 28-lead SSOP packages.
Applications
- Mobile Phone Handsets and Data Cables: Ideal for battery-powered portable devices.
- Laptop and Notebook Computers: Suitable for various laptop and notebook applications.
- Printers and Peripherals: Used in printer and peripheral device communication.
- Modems and PDAs/Hand-Held Devices: Applicable in modem and handheld device communication.
- Automotive Applications: Qualified for use in harsh electrical environments in automotive systems.
Q & A
- What is the operating voltage range of the ADM3311EARUZ-REEL?
The operating voltage range is 2.7 V to 3.6 V.
- What is the maximum data rate supported by the ADM3311EARUZ-REEL?
The maximum data rate supported is up to 460 kbps.
- What type of ESD protection does the ADM3311EARUZ-REEL offer?
The device offers ESD protection up to ±15 kV on RS-232 and CMOS I/Os.
- What is the purpose of the on-board charge pump in the ADM3311EARUZ-REEL?
The on-board charge pump generates positive and negative supplies from the input power supply, eliminating the need for dual power supplies.
- How does the shutdown facility work in the ADM3311EARUZ-REEL?
During shutdown, one receiver remains active, allowing monitoring of peripheral devices while reducing power consumption to less than 1 µA.
- In what packages is the ADM3311EARUZ-REEL available?
The device is available in 28-lead TSSOP and 28-lead SSOP packages.
- What are some common applications of the ADM3311EARUZ-REEL?
Common applications include mobile phone handsets, laptop and notebook computers, printers, modems, and automotive systems.
- Does the ADM3311EARUZ-REEL meet any specific industry standards?
Yes, it fully meets the EIA-232 standard and is compatible with the EU directive on electromagnetic compatibility.
- How does the Green Idle operation feature reduce power consumption?
The Green Idle operation minimizes power consumption by gating the charge pump oscillator on and off to maintain the output voltage under varying load conditions.
- What is the significance of the internal pull-up and pull-down resistors in the ADM3311EARUZ-REEL?
The internal 400 kΩ pull-up resistors on CMOS inputs and 5 kΩ pull-down resistors on RS-232 inputs help stabilize the input signals.
