The model "ADM2687EBRIZ" is a product from Analog Devices, a reputable company known for its analog, mixed-signal, and digital signal processing products.
Package Type and Pin Count
The ADM2687EBRIZ is a RS-485/RS-422 transceiver designed for high-speed data transmission. It comes in a 32-pin LFCSP (Lead Frame Chip Scale Package). The 32 pins of this package correspond to specific functional requirements, and each pin has its own role in the operation of the device.
Pin Function Table
Below is a detailed list of the pin functions for the ADM2687EBRIZ, including descriptions of the roles and connections of each pin.
Pin Number Pin Name Pin Type Pin Function Description 1 VCC Power Supply Power supply pin; provides the operating voltage for the device. 2 GND Ground Ground connection for the device, serves as the reference point. 3 RO Output Receive output, used for outputting received data from the transceiver. 4 RE Input Receiver enable; controls whether the receiver is active or disabled. 5 DE Input Driver enable; controls the operation of the driver circuitry. 6 DI Input Data input; this pin is used for transmitting data from the device. 7 A Input/Output A differential input/output used for RS-485 or RS-422 communication. 8 B Input/Output B differential input/output used for RS-485 or RS-422 communication. 9 VCC Power Supply Additional VCC pin for proper power distribution. 10 GND Ground Ground pin, typically connected to the system ground. 11 NC No Connection No electrical connection. Can be left floating or grounded if needed. 12 NC No Connection No electrical connection. Can be left floating or grounded if needed. 13 NC No Connection No electrical connection. Can be left floating or grounded if needed. 14 NC No Connection No electrical connection. Can be left floating or grounded if needed. 15 NC No Connection No electrical connection. Can be left floating or grounded if needed. 16 NC No Connection No electrical connection. Can be left floating or grounded if needed. 17 RO Output Output for receiving data; carries data signals from the transceiver. 18 RE Input Receiver enable; controls the enable/disable of the receiver. 19 DE Input Driver enable; toggles the driver mode of the transceiver. 20 DI Input Data input pin used for transmission of data signals. 21 A Input/Output A differential input/output for differential signaling in communication. 22 B Input/Output B differential input/output for differential signaling in communication. 23 VCC Power Supply Additional VCC pin for power distribution. 24 GND Ground Ground pin, used to reference the device's electrical signals. 25 NC No Connection No electrical connection. Can be left floating or grounded if needed. 26 NC No Connection No electrical connection. Can be left floating or grounded if needed. 27 NC No Connection No electrical connection. Can be left floating or grounded if needed. 28 NC No Connection No electrical connection. Can be left floating or grounded if needed. 29 NC No Connection No electrical connection. Can be left floating or grounded if needed. 30 NC No Connection No electrical connection. Can be left floating or grounded if needed. 31 RO Output Output for data signals, used in receiving mode. 32 RE Input Receiver enable pin; controls receiver state (enabled/disabled).20 Common FAQ Questions about ADM2687EBRIZ
What is the maximum operating voltage for ADM2687EBRIZ? The ADM2687EBRIZ operates at a voltage range of 3.0V to 5.5V. What is the communication protocol supported by ADM2687EBRIZ? It supports RS-485 and RS-422 communication protocols. How many differential pairs are there in ADM2687EBRIZ? There are two differential pairs (A and B pins). Can the receiver be disabled on the ADM2687EBRIZ? Yes, the receiver can be disabled by setting the RE pin to a high voltage. How do I enable the driver in the ADM2687EBRIZ? You can enable the driver by applying a logic high level to the DE pin. What is the function of pin RO in ADM2687EBRIZ? RO is the receiver output that provides received data from the transceiver. What is the function of pin DI in ADM2687EBRIZ? DI is the data input pin used for transmitting data. What happens if I connect the A and B pins together? Connecting the A and B pins together will cause a short circuit, and the device will not operate correctly. What is the purpose of the GND pin in ADM2687EBRIZ? The GND pin provides the reference ground for all the signals and power supply of the device.Can I use the ADM2687EBRIZ for long-distance communication?
Yes, the ADM2687EBRIZ is designed for long-distance communication in RS-485 networks.What is the maximum data rate supported by ADM2687EBRIZ?
The maximum data rate supported by ADM2687EBRIZ is 20 Mbps.Is ADM2687EBRIZ ESD protected?
Yes, the device includes built-in protection against electrostatic discharge (ESD).What is the function of the VCC pin in ADM2687EBRIZ?
The VCC pin provides the operating voltage for the device.Can ADM2687EBRIZ be used in a 3.3V system?
Yes, ADM2687EBRIZ supports 3.3V operation, making it suitable for lower-voltage systems.How do I connect the ADM2687EBRIZ in a multi-drop RS-485 network?
In a multi-drop RS-485 network, connect all A pins together, all B pins together, and ensure that the RE and DE pins are controlled properly.What is the temperature range of the ADM2687EBRIZ?
The ADM2687EBRIZ operates within the temperature range of -40°C to 85°C.What is the power consumption of ADM2687EBRIZ?
The power consumption depends on the operational mode and data rate, but typically it is low power.Does the ADM2687EBRIZ support half-duplex communication?
Yes, ADM2687EBRIZ supports both full-duplex and half-duplex modes.How do I protect against data collisions in a network using ADM2687EBRIZ?
Use proper termination resistors and ensure correct signal flow to avoid data collisions.Can the ADM2687EBRIZ be used with a microcontroller?
Yes, the ADM2687EBRIZ is ideal for use with microcontrollers in communication applications.The table and FAQ list above provide a detailed overview of the ADM2687EBRIZ, covering all pins, their functions, and some common questions about using this transceiver in your circuits.