Overview
The ADM3488EARZ from Analog Devices Inc. is a 3.3 V, low-power, full-duplex RS-485/RS-422 transceiver designed for balanced data transmission on multipoint bus transmission lines. This device is part of the ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E family and is suitable for applications requiring reliable and high-speed data communication.
The ADM3488EARZ features slew rate limited drivers to minimize EMI and reduce reflections from improperly terminated buses, ensuring error-free data transmission. It also includes thermal shutdown and short-circuit protection to prevent excessive power dissipation.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Supply Voltage | 3.3 | V | |
| Data Rate | Up to 250 kbps | kbps | |
| Duplex Mode | Full-duplex | ||
| Receiver Input Impedance | 12 kΩ | kΩ | Allows up to 32 transceivers on the bus |
| ESD Protection | ±15 kV | kV | On bus pins |
| Package Type | 8-lead SOIC | Surface mount | |
| Common-mode Input Range | −7 V to +12 V | V | |
| Differential Output Delay | 600 - 1400 ns | ns | RL = 60 Ω |
| Propagation Delay | 700 - 1500 ns | ns | RL = 27 Ω |
Key Features
- Slew rate limited drivers to minimize EMI and reduce reflections from improperly terminated buses.
- Full-duplex operation with dedicated differential line driver outputs and receiver inputs.
- Thermal shutdown and short-circuit protection to prevent excessive power dissipation.
- Fail-safe receiver design ensuring a logic high output when inputs are floating.
- ±15 kV ESD protection on bus pins.
- Compliance with TIA/EIA standards RS-485 and RS-422.
- Low power shutdown current.
- Outputs high-Z when disabled or powered off.
Applications
- Power and energy metering.
- Telecommunications.
- EMI-sensitive systems.
- Industrial control systems.
- Local area networks.
- Daisy-chain network topology or point-to-point applications.
Q & A
- What is the maximum data rate of the ADM3488EARZ?
The ADM3488EARZ supports data rates up to 250 kbps.
- What type of duplex mode does the ADM3488EARZ support?
The ADM3488EARZ supports full-duplex operation.
- What is the receiver input impedance of the ADM3488EARZ?
The receiver input impedance is 12 kΩ, allowing up to 32 transceivers on the bus.
- Does the ADM3488EARZ have ESD protection?
Yes, it has ±15 kV ESD protection on bus pins.
- What is the common-mode input range of the ADM3488EARZ?
The common-mode input range is −7 V to +12 V.
- How does the ADM3488EARZ protect against excessive power dissipation?
The device features thermal shutdown and short-circuit protection to prevent excessive power dissipation.
- What happens to the receiver output when the inputs are floating?
The receiver has a fail-safe feature that ensures a logic high output when the inputs are floating.
- Is the ADM3488EARZ compliant with any industry standards?
Yes, it complies with TIA/EIA standards RS-485 and RS-422.
- What type of package does the ADM3488EARZ come in?
The ADM3488EARZ is available in an 8-lead SOIC package.
- What are some typical applications of the ADM3488EARZ?
Typical applications include power and energy metering, telecommunications, EMI-sensitive systems, industrial control systems, and local area networks.
