Overview
The ADM2561EBRNZ-RL7, produced by Analog Devices Inc., is a 3 kV rms signal and power isolated RS-485/RS-422 transceiver. This device is designed for balanced transmission lines and complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) standards. It features an integrated, isolated dc-to-dc converter, which eliminates the need for an external isolated power supply and ensures low radiated emissions, complying with the EN 55032 Class B standard on a 2-layer PCB.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Input VCC Supply | 3.0 | - | 5.5 | V | - |
| Logic VIO Supply | 1.7 | - | 5.5 | V | - |
| Isolated Supply Current (IISOIN) | 50 | - | 75 | mA | VISOIN = 3 V to 3.465 V, 54 Ω between Y and Z (ADM2561E/ADM2563E) |
| Isolated Supply Current (IISOIN) | 55 | - | 75 | mA | VISOIN = 3 V to 3.465 V, 54 Ω between Y and Z (ADM2565E/ADM2567E) |
| Output Voltage (VISOOUT) | 3 | 3.3 | 3.465 | V | VSEL = GNDISO, IISOOUT = 10 mA minimum to 55 mA maximum |
| Maximum Data Rate | - | - | 25 Mbps | - | ADM2565E/ADM2567E |
| Maximum Data Rate | - | - | 500 kbps | - | ADM2561E/ADM2563E for EMI control |
| Propagation Delay (tDPLH, tDPHL) | 18 | 25 | - | ns | RL = 54 Ω, CL1 = CL2 = 100 pF |
| Output Skew (tSKEW) | 1.5 | 5 | - | ns | RL = 54 Ω, CL1 = CL2 = 100 pF |
| Rise Time/Fall Time (tDR, tDF) | 4.5 | 10 | - | ns | RL = 54 Ω |
| Operating Temperature | -40 | - | +105 | °C | - |
| Package Type | - | - | - | - | 28-lead SOIC_W_FP |
Key Features
- 3 kV rms signal and power isolation
- Integrated, isolated dc-to-dc converter
- Low radiated emissions, compliant with EN 55032 Class B standard on a 2-layer PCB
- Cable invert smart feature to correct reversed cable connections on A, B, Y, and Z bus pins while maintaining full receiver fail-safe feature
- ESD protection on RS-485 A, B, Y, and Z pins: ±12 kV IEC61000-4-2 contact discharge and ±15 kV IEC61000-4-2 air discharge
- High speed data rate of up to 25 Mbps (ADM2565E/ADM2567E) and low speed data rate of 500 kbps for EMI control (ADM2561E/ADM2563E)
- Flexible power supplies: Input VCC supply of 3 V to 5.5 V and logic VIO supply of 1.7 V to 5.5 V
- Wide operating temperature range: -40°C to +105°C
- High common-mode transient immunity: 250 kV/μs
- Full hot swap support (glitch-free power-up/power-down)
- Supports up to 192 bus nodes (72 kΩ receiver input impedance)
Applications
- Heating, ventilation, and air conditioning (HVAC) networks
- Industrial field buses
- Building automation
- Utility networks
- Energy meters
Q & A
- What is the primary function of the ADM2561EBRNZ-RL7?
The ADM2561EBRNZ-RL7 is a 3 kV rms signal and power isolated RS-485/RS-422 transceiver designed for balanced transmission lines.
- What are the key isolation features of this device?
The device features 3 kV rms signal and power isolation, along with an integrated, isolated dc-to-dc converter.
- What are the data rate options for this transceiver?
The device offers high speed data rates of up to 25 Mbps (ADM2565E/ADM2567E) and low speed data rates of 500 kbps for EMI control (ADM2561E/ADM2563E).
- What is the operating temperature range of the ADM2561EBRNZ-RL7?
The operating temperature range is -40°C to +105°C.
- Does the device have ESD protection?
Yes, it has ESD protection on RS-485 A, B, Y, and Z pins with ±12 kV IEC61000-4-2 contact discharge and ±15 kV IEC61000-4-2 air discharge.
- What is the cable invert smart feature?
The cable invert smart feature corrects reversed cable connections on A, B, Y, and Z bus pins while maintaining full receiver fail-safe feature.
- What are the compliance standards for this device?
The device complies with ANSI/TIA/EIA-485-A-98, ISO 8482:1987(E), and EN 55032 Class B standards.
- What is the package type of the ADM2561EBRNZ-RL7?
The device is packaged in a 28-lead SOIC_W_FP package.
- What are some typical applications for this transceiver?
Typical applications include HVAC networks, industrial field buses, building automation, utility networks, and energy meters.
- Does the device support hot swapping?
Yes, it supports full hot swap (glitch-free power-up/power-down).
