ADM488AN - 250kbps Full-Duplex RS-485 IC | Analog Devices
MPN: ADM488AN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ADM488AN Overview
An RS-485 transceiver is an interface IC that converts logic-level signals into balanced differential signals for reliable communication over long, multipoint copper buses. The differential signal helps reject common-mode noise, while the receiver converts the differential bus voltage back into a logic-level output. The ADM488 belongs to the broader RS-485 transceiver, communications interface, interface IC, and semiconductor hierarchy.
Key features include a maximum 250kbps data rate, a single 5V supply, low power operation, and slew-rate-limited outputs that reduce unwanted high-frequency EMI. The receiver's 12kΩ input impedance supports practical bus loading, while the ±12V common-mode range accommodates signaling variations in industrial environments. The device also meets the EIA RS-485 standard and includes 2kV EFT protection according to the cited manufacturer and datasheet listings.
The ADM488 and ADM489 family is designed for balanced differential communication on multipoint bus transmission lines. Full-duplex operation supports separate transmit and receive paths, which is useful when a node must communicate while monitoring another channel. Slew-rate limiting helps control edge rates and reduce electromagnetic emissions, although cable length, termination, biasing, and grounding remain application-level requirements.
Typical applications include industrial control networks, building automation, instrumentation, factory equipment, and isolated or non-isolated RS-485 data links. The 8-pin PDIP package is suitable through-hole assembly where a robust, inspectable package is preferred. The manufacturer lists the ADM488 as a production device, but exact stock, lead time, and price are not available in the supplied data.
For a new design, verify the complete pinout, receiver enable or shutdown behavior, bus termination, fail-safe biasing, and isolation strategy against the exact datasheet revision before layout. Do not substitute a part solely by function; the alternative must use the same package footprint and be pin-to-pin compatible. This page combines manufacturer information, distributor availability, and verified cross-reference results into a practical sourcing and design reference.
Drop-in alternatives for ADM488AN — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADM488ANZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADM488ARZ
✅ Drop-In📋 Reference alternative (not in catalog)
MAX488ECPA+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX488EEPA+
✅ Drop-In📋 Reference alternative (not in catalog)
ADM488AN Specifications
| Product Type | Full-duplex differential RS-485/RS-422 transceiver |
| Supply Voltage | 5 V |
| Data Rate | 250 kbps |
| Bus Common-Mode Range | -12 V to +12 V |
| Receiver Input Impedance | 12 kΩ |
| Driver and Receiver Count | 1 driver and 1 receiver |
| Communication Mode | Full duplex |
| Interface Standard | EIA RS-485 and EIA RS-422 |
| EFT Protection | 2 kV EFT protection |
| Slew Rate | Slew-rate-limited output |
| Operating Temperature | -40°C to +85°C |
| Package | 8-pin PDIP |
| Mounting Type | Through-hole |
| Power Consumption | Low-power operation |
| Driver Output | Differential balanced output |
| Receiver Output | Differential logic receiver |
| Multipoint Bus Support | Supported |
ADM488AN 8-pin pdip Pin Configuration Guide
Pin configuration for ADM488AN (8-pin pdip package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for ADM488AN.
Refer to the datasheet for full pin configuration.
Typical Applications
ADM488AN is suitable for 6 applications: Industrial RS-485 Control Networks, Building Automation and Environmental Monitoring, Factory Equipment and Data Acquisition, Instrumentation and Test Equipment, Remote Sensor and Actuator Networks, Full-Duplex RS-485 Backbone Links.
Industrial RS-485 Control Networks
The ADM488AN fits industrial control and instrumentation links that need differential communication over a multipoint bus. Its documented 250kbps maximum data rate is suitable for supervisory control, sensor aggregation, actuator status, and equipment-to-equipment messaging where cable length and topology are controlled. The ±12V bus common-mode range helps the receiver tolerate field-side voltage variation, while the 12kΩ input impedance supports bus loading analysis. Full-duplex operation separates transmit and receive paths when the controller must communicate while receiving status. The design should still include correct termination, fail-safe biasing, grounding, and surge protection.
Recommended
Building Automation and Environmental Monitoring
ADM488AN is appropriate for building-automation nodes that distribute measurements and control commands over a wired RS-485 backbone. The 250kbps rate is more than adequate for common supervisory traffic carrying temperature, occupancy, lighting, and equipment-status information. Differential signaling helps reduce susceptibility to common-mode noise in buildings where motor, lighting, and power systems share cable pathways. The full-duplex architecture can support simultaneous command transmission and sensor reporting. For long building runs, verify cable type, topology, grounding strategy, and the maximum node count before committing to the bus layout.
Recommended
Factory Equipment and Data Acquisition
The ADM488AN can serve as the physical-layer interface in factory equipment and data-acquisition systems where reliable wired communication is preferred over an RF link. Its 250kbps capability supports moderate-rate telemetry, configuration data, and diagnostic messages. The documented -12V to +12V common-mode range and 2kV EFT protection are relevant when field wiring experiences industrial electrical transients. Designers should place protection and filtering close to the connector, route the differential pair as a balanced pair, and account for ground potential differences between equipment cabinets. The transceiver does not replace application-level CRC, timeout, or fault handling.
Recommended
Instrumentation and Test Equipment
ADM488AN is useful in instrumentation that needs a dependable differential control and measurement link between a host computer and remote instruments. The 250kbps data rate is suitable for commands, status frames, and moderate data streams, while full-duplex operation can reduce the need to time-share a single bus direction. The device is also described as slew-rate limited, which helps control edge-rate emissions in test environments containing sensitive analog and digital circuits. Engineers should keep the bus wiring away from high-impedance measurement nodes and use an isolated interface when ground potentials or surge exposure exceed the application requirements.
Recommended
Remote Sensor and Actuator Networks
The ADM488AN is suitable for distributed sensor and actuator networks that use a wired multipoint bus. At up to 250kbps, it can carry periodic sensor readings, switch commands, diagnostic information, and configuration updates across several nodes. The 12kΩ receiver input impedance is an important consideration when sizing the bus and choosing cable, while the ±12V common-mode range supports field-side variation. For reliable operation, the network designer should implement deterministic polling or collision avoidance appropriate to RS-485, provide termination at the cable ends, and add biasing so the receiver sees a defined state when all drivers are inactive.
Recommended
Full-Duplex RS-485 Backbone Links
ADM488AN is a fit for full-duplex RS-485 links where separate differential pairs are available for transmission and reception. This architecture simplifies communication when a node must send commands while simultaneously receiving acknowledgements or telemetry, avoiding the directional turnaround complexity of a half-duplex bus. The verified 250kbps rate and slew-rate-limited output support controlled signaling on a multipoint transmission line. PCB layout should preserve the integrity of both differential pairs, use a low-noise reference plane, and keep protection components away from sensitive receiver nodes. Cable and grounding design must be validated at the intended field-side voltage levels.
Recommended
Recommended Products Summary
Engineering reference data for ADM488AN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADM488ANZ | ADM488ARZ | LTC490IS8#PBF | MAX488ECPA+ | MAX488EEPA+ |
|---|---|---|---|---|---|---|
| Package | 8-pin PDIP | 8-pin PDIP - same package classification | SOIC-8 - different package, not strict drop-in | SOIC-8 - different package, not strict drop-in | DIP-8 - package family comparison | DIP-8 - package family comparison |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Maxim Integrated | Maxim Integrated |
Key Differentiators
- Documented 250kbps full-duplex operation (vs MAX488ECPA+)
- ±12V bus common-mode range (vs LTC490IS8#PBF)
- 2kV EFT protection (vs MAX488EEPA+)
- Same-brand family sourcing (vs ADM488ARZ)
Design Notes
Route the ADM488AN differential pair as a controlled-impedance or tightly coupled pair on the PCB, keeping the two conductors together and minimizing stub branches. Use a continuous reference plane beneath the pair where practical, and place termination components at the physical cable endpoints rather than near the transceiver unless the system topology requires otherwise. The verified 250kbps rate makes edge-rate control important; the slew-rate-limited output helps, but trace geometry, connector return paths, and cable transitions still determine signal integrity.
Design the 5V supply path with local decoupling close to the ADM488AN and verify the complete supply-current and absolute-maximum limits from the manufacturer datasheet. Keep transceiver supply noise away from sensitive analog sections, and provide adequate return-current continuity between the IC, connector, and protection network. Because the supplied data does not state operating-current limits, do not calculate thermal or decoupling margins from assumed values; obtain those figures from the official datasheet before release.
Do not treat a functional RS-485 transceiver as automatically pin-compatible with ADM488AN. Confirm the exact 8-pin PDIP pinout, enable or shutdown logic, receiver threshold, driver output limits, protection ratings, and package drawing before substituting any listed alternative. For the ADM488AN, the verified data confirms full-duplex operation, 250kbps, ±12V common-mode range, and 2kV EFT protection, but it does not provide the complete pin names or absolute maximum ratings.
RS-485 bus behavior depends on the entire network, not only the transceiver. Confirm termination values, fail-safe biasing, cable length, node count, grounding, and protection against application transients. The supplied data does not state whether ADM488AN includes internal termination or fail-safe bias, so those functions must not be assumed. Validate idle differential voltage, driver contention, common-mode margin, and receiver behavior under worst-case cable and power conditions.
Compliance Information
The supplied manufacturer and distributor search snippets do not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status for ADM488AN. EIA RS-485, RS-422, and IEC1000-4-4 references appear in the supplied technical snippets, but the latter must be confirmed against the official datasheet.