Analog Devices Inc. ADM3485EARZ
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mfr | Analog Devices Inc. |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C |
| Type | Transceiver |
| Data Rate | 10Mbps |
| Receiver Hysteresis | 50 mV |
| Supplier Device Package | 8-SOIC |
| Voltage - Supply | 3V ~ 3.6V |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| Package | Tube |
| Product Status | Active |
| Base Product Number | ADM3485 |
| REACH Status | REACH Unaffected |
| Standard Package | 98 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
ADM3485EARZ – 3.3V Low-Power RS-485/RS-422 Transceiver with ±15kV ESD Protection
The ADM3485EARZ is a robust, low-power, half-duplex RS-485/RS-422 transceiver designed for balanced data transmission in industrial and communication applications. Operating on a 3.3V supply, it supports data rates up to 12 Mbps (15 Mbps in some variants) and features ±15 kV ESD protection on bus pins, ensuring reliability in harsh environments. Compliant with TIA/EIA-485-A and RS-422 standards, it integrates a driver and receiver with independent enable inputs, allowing flexible bus control. The device supports up to 32 nodes on a single bus with a 12 kΩ receiver input impedance and includes fail-safe circuitry to maintain a logic-high output when inputs are open or shorted. Its industrial temperature range (-40°C to +85°C) and 8-pin SOIC package make it ideal for industrial automation, HVAC systems, and smart metering.
ADM3485EARZ Key Features & Benefits
The ADM3485EARZ excels in low-power operation, drawing only 2.2 mA supply current, with a high-impedance state in shutdown mode for energy efficiency. Its wide common-mode input range (-7V to +12V) ensures noise immunity in electrically noisy environments, while thermal shutdown protection prevents damage from bus contention or short circuits. The fail-safe receiver design guarantees stable operation even with floating or terminated bus lines. Additionally, its compact SOIC-8 footprint (5mm × 4mm × 1.5mm) facilitates space-constrained PCB designs. Applications include industrial control systems, telecom networks, LANs, and power management systems where robust differential communication is critical.
ADM3485EARZ Applications
The ADM3485EARZ is widely used in industrial automation (PLC, motor control), building automation (HVAC, access control), smart meters, and medical instrumentation. Its low EMI and high noise immunity make it suitable for long-distance communication over twisted-pair cables. The device is also employed in telecom infrastructure, security systems, and automotive diagnostics where reliable differential signaling is essential.
Recommended Replacement/Alternative 1/1 Transceiver Models
● ADM3485EARZ-REEL – Similar specs, tape-and-reel packaging, 12 Mbps data rate.
● ADM3485EAR – Higher speed (20 Mbps), same ESD protection and 3.3V operation.
● SP3485CN-L – 3.3V RS-485 transceiver, 10 Mbps, narrower voltage range (3.135V–3.465V).
● SN65HVD72 (TI) – 3.3V, 20 Mbps, supports up to 256 nodes.
● MAX3485ESA (Maxim) – 3.3V, 12 Mbps, industrial temp range, SOIC-8 package.
