Overview
The ADM3312EARU is a serial port 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. It operates with a single 2.7 V to 3.6 V power supply and features an on-board charge pump dc-to-dc converter, eliminating the need for dual power supplies. This converter generates positive and negative supplies from the input power supply, operating in Green Idle mode to minimize power consumption, making it ideal for battery-powered portable devices.
Key Specifications
| Parameter | Value |
|---|---|
| Power Supply Voltage | 2.7 V to 3.6 V |
| Power Supply Current | 0.45 mA to 1 mA (no load, VCC = 3.0 V to 3.6 V) |
| Shutdown Supply Current | 0.02 µA to 1 µA |
| Input Pull-Up Current | 10 µA to 25 µA |
| Input Leakage Current (SD, EN) | 0.02 ±1 µA |
| Input Logic Threshold Low (VINL) | 0.8 V |
| Data Rate | Up to 460 kb/s |
| ESD Protection | >15 kV IEC 1000-4-2 on RS-232 I/Os and CMOS I/Os |
| Drivers and Receivers | 3 drivers, 3 receivers |
| Receiver Input Resistance | 22 kΩ (for ADM3315E, but applicable in context) |
Key Features
- Full RS-232 compliance with a single 2.7 V to 3.6 V power supply.
- On-board charge pump dc-to-dc converter with Green Idle mode for low power consumption.
- ESD protection up to ±15 kV on RS-232 and CMOS I/Os.
- Shutdown facility with one receiver active (ADM3312E), allowing monitoring of peripheral devices.
- Operates with 3 V logic.
- Charge pump capacitors: 0.1 μF to 1 μF.
Applications
- Mobile phone handsets and data cables.
- Laptop and notebook computers.
- Printers and peripherals.
- Modems.
- PDAs, hand-held devices, and palmtop computers.
Q & A
- What is the power supply voltage range for the ADM3312EARU?
The power supply voltage range is 2.7 V to 3.6 V.
- What is the maximum data rate supported by the ADM3312EARU?
The maximum data rate is up to 460 kb/s.
- Does the ADM3312EARU have ESD protection?
- How many drivers and receivers does the ADM3312EARU have?
- What is the shutdown supply current of the ADM3312EARU?
- Is the ADM3312EARU suitable for automotive applications?
- What is the Green Idle mode in the ADM3312EARU?
- Can the ADM3312EARU operate with 3 V logic?
- What are the typical applications of the ADM3312EARU?
- How does the shutdown facility work in the ADM3312EARU?
