Part A
ADM483EARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6730 PCS
- Package
- SOIC-8
- Series
- Interface - Condutores, Receptores, Transceivers
Replacement verdict
Compatible functional replacement candidate
The ADM483EARZ and ADM4852AR are both half-duplex RS-485/RS-422 transceivers in 8-lead SOIC packages with 5 V supply and similar data rates, making the ADM4852AR a viable functional replacement candidate for the ADM483EARZ in many designs. However, the ADM4852AR lacks the ADM483EARZ's enhanced ESD protection and integrated slew-rate limiting, so the replacement should be validated against the target application's ESD immunity and EMI requirements before adoption.
ESD Protection Level
Validation required
Data Rate
High match
Package Type
High match
Slew-Rate Limiting
Validation required
Parts at a glance
Part B
ADM4852AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3236 PCS
- Package
- SOIC-8
- Series
- Interface - Condutores, Receptores, Transceivers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADM483EARZ | ADM4852AR | Why it matters |
|---|---|---|---|
| Data Rate | 250 kbps | 2.5 Mbps | Determines the maximum communication speed the transceiver can support; the ADM4852AR is significantly faster, which may be required for high-speed buses. |
| Duplex Mode | Half-duplex | Half-duplex | Both are half-duplex, so they share the same two-wire bus topology and are functionally interchangeable in that respect. |
| Number of Drivers/Receivers | 1 driver / 1 receiver | 1 driver / 1 receiver | Confirms both are single-channel transceivers, matching the same point-to-point or multi-drop bus configuration. |
| Supply Voltage | 5 V | 5 V | Both operate from a 5 V supply, so the same power rail can be used without redesign. |
| ESD Protection (Bus Pins) | ±15 kV (HBM) | ±15 kV (HBM) | Both offer the same level of ESD robustness on the bus pins, important for field reliability in harsh environments. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature range means both suit the same environmental conditions. |
| Package / Mounting | 8-SOIC (surface mount) | 8-SOIC (surface mount) | Same package and footprint allow direct board-level substitution without layout changes. |
| Fail-Safe Receiver | Yes (open-circuit fail-safe) | Yes (open-circuit fail-safe) | Both provide defined output under open-circuit conditions, preventing indeterminate bus states. |
| Current Consumption (Typical) | ~0.5 mA (quiescent) | ~0.5 mA (quiescent) | Similar quiescent current means comparable power budget impact in low-power designs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADM483EARZ | ADM4852AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | Transceiver | Transceiver |
| Protocol | RS422, RS485 | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 | 1/1 |
| Voltage - Supply | 4.5V ~ 5.5V | 4.75V ~ 5.25V |
| Mounting Type | Surface Mount | Surface Mount |
| Duplex | Half | - |
| Receiver Hysteresis | 70 mV | - |
| Data Rate | 250kbps | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What are the primary differences between the ADM483EARZ and ADM4852AR?
The ADM483EARZ is a ±15 kV ESD protected, half-duplex RS-485/RS-422 transceiver specified for 5 V operation with a data rate of 250 kbps, housed in an 8-lead SOIC package. The ADM4852AR is a 5 V, half-duplex RS-485/RS-422 transceiver rated for 2.5 Mbps data rates, also in an 8-lead SOIC package, but with a lower ESD protection level of ±8 kV (contact) per its datasheet. The ADM483EARZ targets lower-speed, higher-ESD-immunity applications, while the ADM4852AR targets higher-speed communication.
Are the ADM483EARZ and ADM4852AR pin-compatible?
Both devices are offered in an 8-lead SOIC package with the standard RS-485 transceiver pinout (RO, RE, DE, DI, GND, A, B, VCC). However, pin compatibility should be confirmed against the specific datasheet revision and PCB land pattern before substitution, since package body width and lead finish may differ between the two parts.
What data rates do the ADM483EARZ and ADM4852AR support?
The ADM483EARZ supports data rates up to 250 kbps, as specified in its datasheet. The ADM4852AR supports data rates up to 2.5 Mbps. The higher slew-rate capability of the ADM4852AR makes it suitable for faster bus networks, while the ADM483EARZ is intended for lower-speed, longer-bus applications where reduced EMI is beneficial.
How do the ESD protection ratings of the ADM483EARZ and ADM4852AR compare?
The ADM483EARZ is specified with ±15 kV ESD protection on the RS-485 bus pins (Human Body Model) per its datasheet. The ADM4852AR is specified with ±8 kV ESD protection (contact discharge, IEC 61000-4-2) on the bus pins. Designs requiring higher ESD immunity should favor the ADM483EARZ, while the ADM4852AR offers adequate protection for many standard industrial environments.
Can the ADM4852AR directly replace the ADM483EARZ in an existing design?
Direct replacement is possible only after verifying that the higher 2.5 Mbps data rate of the ADM4852AR does not cause excessive EMI or reflections on the existing bus, that the lower ±8 kV ESD rating meets the application's immunity requirements, and that the pinout and package dimensions match the PCB footprint. The designer must validate these differences against both datasheets before substitution.
What supply voltage and quiescent current do these transceivers require?
Both the ADM483EARZ and ADM4852AR operate from a single 5 V ±5% supply. The ADM483EARZ datasheet specifies a quiescent supply current in the low-milliampere range, while the ADM4852AR datasheet specifies its own quiescent current value. Designers should consult the respective datasheets for exact quiescent and shutdown current figures, as these differ between the two parts.
Do both parts support half-duplex operation and fail-safe receiver behavior?
Yes. Both the ADM483EARZ and ADM4852AR are half-duplex RS-485/RS-422 transceivers with a receiver enable and driver enable pin. Both datasheets specify fail-safe receiver outputs that default to a logic high when the bus is open or idle, preventing indeterminate states on the communication line.