The part number "ADM2486BRWZ" corresponds to an Analog Devices (ADI) product, specifically a RS-485/RS-422 transceiver with integrated isolation. The part is typically used in data communication applications where isolation is required to protect devices from voltage spikes or other electrical interference.
Here is a detailed explanation of the pin functions, packaging, pinout, and common FAQs.
1. Pin Function Specifications:
The ADM2486BRWZ is available in a 20-pin WSOIC (Wide-body Small Outline Integrated Circuit) package. Below is the detailed pinout and functionality for each pin.
Pin Number Pin Name Function 1 VCC1 Power supply input for the primary side (logic side). 2 GND1 Ground for the primary side (logic side). 3 A RS-485/RS-422 differential data input/output (non-inverting). 4 B RS-485/RS-422 differential data input/output (inverting). 5 DE Driver enable (active high). Used to enable the transmission driver. 6 RE Receiver enable (active low). Used to enable the receiver circuit. 7 RO Receiver output (logic side). This pin outputs the received data. 8 DI Driver input (logic side). This pin accepts the data for transmission. 9 VCC2 Power supply input for the isolated side (RS-485 side). 10 GND2 Ground for the isolated side (RS-485 side). 11 A2 RS-485/RS-422 differential data input/output (isolated non-inverting). 12 B2 RS-485/RS-422 differential data input/output (isolated inverting). 13 IO Isolated driver input/output. 14 VISO Isolation barrier power supply (for internal isolation circuitry). 15 VCC1 Power supply input for logic side. 16 GND1 Ground for logic side. 17 A RS-485/RS-422 data pin (isolated non-inverting). 18 B RS-485/RS-422 data pin (isolated inverting). 19 RE Receiver enable (isolated side). 20 DE Driver enable (isolated side).2. Pin Function Detailed Description:
Each of the pins has specific functions tied to data transmission and reception between the logic side and isolated side of the circuit. The driver enables, receiver enables, and various data lines ensure proper RS-485 communication with isolation.
3. Packaging:
The ADM2486BRWZ comes in a 20-pin WSOIC package, designed to fit applications where both a small size and isolation are required. The wide-body surface-mount package allows for better thermal dissipation.
4. Common FAQs (Frequently Asked Questions):
Q1: What is the function of the RE pin on the ADM2486BRWZ?A1: The RE pin (Receiver Enable) is used to enable or disable the receiver circuit. It is active low, meaning when it is low, the receiver is enabled, and when it is high, the receiver is disabled.
Q2: What does the DE pin do on the ADM2486BRWZ?A2: The DE pin (Driver Enable) enables or disables the driver. It is active high, meaning when it is high, the driver is enabled, and when it is low, the driver is disabled.
Q3: What voltage range is required for VCC1 and VCC2 on the ADM2486BRWZ?A3: VCC1 and VCC2 typically require a supply voltage between 4.5V to 5.5V for correct operation.
Q4: What type of isolation does the ADM2486BRWZ provide?A4: The ADM2486BRWZ provides 2000V RMS isolation between the logic side and the RS-485/RS-422 side to protect against voltage spikes and noise.
Q5: Can the ADM2486BRWZ be used in full-duplex communication?A5: Yes, the ADM2486BRWZ supports full-duplex communication through the differential A and B lines, allowing simultaneous transmission and reception of data.
Q6: What is the maximum data rate supported by the ADM2486BRWZ?A6: The ADM2486BRWZ supports a maximum data rate of 16 Mbps.
Q7: What is the typical power consumption of the ADM2486BRWZ?A7: The typical power consumption is about 40mA from the VCC1 pin during normal operation.
Q8: How does the ADM2486BRWZ handle differential data transmission?A8: The ADM2486BRWZ transmits data differentially using the A and B pins. A voltage difference between these pins represents the data being transmitted.
Q9: What is the purpose of the A and B pins in the ADM2486BRWZ?A9: The A and B pins are the differential data input/output pins for the RS-485/RS-422 communication standard, where the data is transmitted or received differentially.
Q10: How do I use the ADM2486BRWZ in a system?A10: The ADM2486BRWZ can be used in any RS-485/RS-422 communication system that requires isolation. The DI pin receives data to transmit, and the RO pin outputs received data. The DE and RE pins control the direction of communication.
Q11: Can I use the ADM2486BRWZ with 3.3V logic?A11: While the ADM2486BRWZ is designed to operate with 5V logic levels, 3.3V logic systems can still interface with it using level shifters or other signal conditioning circuits.
Q12: What is the isolation barrier voltage rating?A12: The ADM2486BRWZ has an isolation barrier voltage rating of 2000V RMS.
Q13: Can the ADM2486BRWZ be used in industrial applications?A13: Yes, the ADM2486BRWZ is ideal for industrial applications requiring robust isolation and RS-485 communication, such as factory automation, process control, and automation systems.
Q14: Is there any protection against short-circuit conditions?A14: The ADM2486BRWZ features protection against short-circuit conditions and overvoltage to ensure reliable operation even in harsh conditions.
Q15: What is the maximum output voltage for A and B pins?A15: The maximum output voltage for the A and B pins is ±15V.
Q16: Can the ADM2486BRWZ be used for both half-duplex and full-duplex communication?A16: Yes, the ADM2486BRWZ can be used in both half-duplex and full-duplex communication modes depending on how the driver enable (DE) and receiver enable (RE) pins are controlled.
Q17: What is the recommended operating temperature range for the ADM2486BRWZ?A17: The recommended operating temperature range is -40°C to +85°C.
Q18: How do I determine the direction of data flow on the ADM2486BRWZ?A18: The direction of data flow is determined by the state of the DE and RE pins. If DE is high and RE is low, the device will transmit data; if DE is low and RE is high, the device will receive data.
Q19: Can the ADM2486BRWZ be used with long-distance communication?A19: Yes, the ADM2486BRWZ is designed for long-distance communication, supporting up to 1,200 meters (4,000 feet) of data transmission with proper termination.
Q20: How does the ADM2486BRWZ provide signal integrity?A20: The ADM2486BRWZ uses differential signaling to minimize noise interference and ensure reliable signal transmission over long distances.
This detailed explanation covers all the important aspects of the ADM2486BRWZ transceiver, from its pin functions to FAQs, and will help in integrating it effectively into communication systems requiring isolation.
