Part A
ADM4852ARZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4726 ПКС
- Package
- SOIC-8
- Series
- Интерфейс - драйверы, приемники, передатчики
Replacement verdict
Compatible functional replacement candidate
The ADM4853ARZ and ADM4852ARZ are functionally compatible RS-485 transceivers from the same Analog Devices family, sharing an identical SOIC-8 footprint, supply voltage range, and data rate. The ADM4853ARZ adds a driver enable pin and a receiver enable pin for independent control, whereas the ADM4852ARZ provides a single combined enable. Designers should confirm enable-pin logic and half-duplex configuration against their specific bus control scheme before substituting.
Package Type
High match
Supply Voltage Range
High match
Data Rate
High match
Enable Pin Configuration
Validation required
Parts at a glance
Part B
ADM4853ARZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6517 ПКС
- Package
- SOIC-8
- Series
- Интерфейс - драйверы, приемники, передатчики
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADM4853ARZ | ADM4852ARZ | Why it matters |
|---|---|---|---|
| Data Rate | 500 kbps | 2.5 Mbps | Maximum signaling speed; determines whether the part can support the required bus bandwidth in the target application. |
| Duplex Mode | Half duplex | Half duplex | Defines whether transmit and receive share the same differential pair; must match the bus topology and cabling. |
| Number of Drivers/Receivers | 1/1 | 1/1 | Indicates the transceiver channel count; must align with the node configuration on the RS-485 network. |
| Supply Voltage | 5 V | 5 V | Operating supply rail; must match the system power architecture and logic-level compatibility. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Guaranteed ambient range; affects suitability for industrial and outdoor environments. |
| Package / Mounting | 8-SOIC (surface mount) | 8-SOIC (surface mount) | Footprint and assembly compatibility; identical packages allow drop-in board replacement. |
| Fail-Safe Receiver | Yes (open-circuit, short-circuit, idle-bus) | Yes (open-circuit, short-circuit, idle-bus) | Ensures a defined logic output when the bus is undriven, preventing spurious data during idle or fault conditions. |
| ESD Protection (Bus Pins) | ±15 kV (HBM) | ±15 kV (HBM) | Robustness against electrostatic discharge on the differential bus; affects field reliability and required external protection. |
| Driver Output / Receiver Input Common-Mode Range | -7 V to +12 V | -7 V to +12 V | TIA/EIA-485 compliance range; determines interoperability and noise margin across long bus runs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADM4852ARZ | ADM4853ARZ |
|---|---|---|
| Part Status | Active | Active |
| Type | Transceiver | Transceiver |
| Protocol | RS422, RS485 | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 | 1/1 |
| Duplex | Half | Half |
| Receiver Hysteresis | 20 mV | 20 mV |
| Data Rate | 2.5Mbps | 10Mbps |
| Voltage - Supply | 4.75V ~ 5.25V | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the ADM4853ARZ and ADM4852ARZ?
Both are 5 V, half-duplex RS-485/RS-422 transceivers in 8-lead SOIC (R-8) packages from Analog Devices. The primary difference is the receiver input impedance and thus the allowable number of nodes on the bus: the ADM4852ARZ is a standard full-load receiver (1 unit load, 32 nodes), while the ADM4853ARZ is a low-load receiver (1/8 unit load, 256 nodes). The ADM4853ARZ also specifies a lower quiescent supply current in some operating modes per the datasheet.
Are the ADM4853ARZ and ADM4852ARZ pin-compatible?
Yes. Both devices use the same 8-lead SOIC (R-8) package and the same pinout: RO, /RE, DE, DI, GND, A, B, and VCC. This allows a drop-in replacement on an existing PCB footprint, provided the bus loading and current requirements are revalidated.
How many nodes can each device support on an RS-485 bus?
The ADM4852ARZ presents 1 unit load to the bus and supports up to 32 nodes. The ADM4853ARZ presents 1/8 unit load and supports up to 256 nodes on the same bus, making it preferable for high-node-count networks.
Do both parts support the same data rate?
Yes. Both the ADM4852ARZ and ADM4853ARZ are specified for data rates up to 2.5 Mbps, per the Analog Devices datasheet, and both are slew-rate limited for reduced EMI.
What is the supply voltage and operating temperature range for these transceivers?
Both devices operate from a single 5 V ±5% supply and are specified over the industrial temperature range of −40°C to +85°C.
Do the ADM4852ARZ and ADM4853ARZ include fail-safe receiver behavior?
Yes. Both devices feature a fail-safe receiver that guarantees a logic-high receiver output when the bus inputs are open or shorted, or when the bus is idle with all drivers disabled, per the Analog Devices datasheet.
Which part should be selected for a high-node-count RS-485 network?
The ADM4853ARZ should be selected when more than 32 nodes are required, because its 1/8 unit load receiver input impedance permits up to 256 nodes. The ADM4852ARZ is appropriate for networks limited to 32 nodes.
Are both devices ESD-protected, and do they share the same ESD rating?
Yes. Both the ADM4852ARZ and ADM4853ARZ include ESD protection on the RS-485 bus pins, with the same specified ESD rating per the Analog Devices datasheet. Designers should confirm the exact rating from the current datasheet revision for their qualification requirements.