IC TX/RX SINGLE RS-485 5V 8SOIC Hi Friends! I welcome you on board.
1604
Jul 12, 2021
Hilary Martin
1
IC TX/RX SINGLE RS-485 5V 8SOIC
Hi Friends! I welcome you on board. Thank you for reading my article.In this post today, I’ll document the Introduction to ADM485.ADM485 is a 5 V Low Power EIA RS-485 Transceiver.I suggest you read this article carefully, because I will guide you through the complete introduction of ADM485, including pinout, datasheet, circuit diagram, application and outline dimensions...let's begin.
ADM485AR
The ADM485 is a differential line transceiver, suitable for high-speed two-way data communication on multipoint bus transmission lines. It is designed for balanced data transmission and complies with EIA standards RS-485 and RS-422. This part contains a differential line driver and a differential line receiver. Both the driver and the receiver can be enabled independently. When disabled, the output is tri-stated.
The ADM485 is powered by a single 5 V power supply. The thermal shutdown circuit prevents excessive power consumption caused by bus contention or output short circuits. If a significant temperature rise is detected in the internal driver circuit under fault conditions, this function will force the driver output into a high impedance state. Up to 32 transceivers can be connected to a bus at the same time, but only one driver can be enabled at any time. Therefore, it is important that the rest of the disabled drivers do not load the bus. To ensure this, the ADM485 driver has a high output impedance when disabled and powered down, thereby minimizing the loading effect when the transceiver is not used. The high-impedance driver output remains within the common-mode voltage range of -7 V to +12 V. The receiver contains a fail-safe function, if the input is not connected (floating), it will cause a logic high output state.
The ADM485 is manufactured using BiCMOS, which is an advanced hybrid technology process that combines low-power CMOS with fast switching bipolar technology. All inputs and outputs include ESD protection; all driver outputs have high source current and sink current capabilities. The epitaxial layer is used to prevent latch-up.
The ADM485 has extremely fast switching speed. The smallest driver propagation delay allows transmission at data rates up to 5 Mbps, while low skew minimizes EMI interference. The part is fully compliant with commercial and industrial temperature ranges, and is available in 8-pin PDIP, 8-pin SOIC and small, 8-pin MSOP packages.
Symbol
Footprint
3D Model
1.Meets EIA RS-485 standard
2.5 Mbps data rate
3.Single 5 V supply
4.–7 V to +12 V bus common-mode range
5.High speed, low power BiCMOS
6.Thermal shutdown protection
7.Short-circuit protection
8.Driver propagation delay: 10 ns typical
9.Receiver propagation delay: 15 ns typical
10.High-Z outputs with power off
11.Superior upgrade for LTC485
Analog Devices Inc. ADM485AR technical specifications, attributes, parameters and parts with similar specifications to Analog Devices Inc. ADM485AR.
Analog Devices Inc. ADM485AR technical specifications, attributes, parameters and parts with similar specifications to Analog Devices Inc. ADM485AR.
| Product Attribute | Attribute Value | |
|---|---|---|
| Contact Plating | Lead, Tin | |
| Mount | Surface Mount | |
| Mounting Type | Surface Mount | |
| Package / Case | 8-SOIC (0.154, 3.90mm Width) | |
| Number of Pins | 8Pins | |
| Weight | 540.001716mg | |
| Operating Temperature | -40°C~85°C | |
| Packaging | Tube | |
| JESD-609 Code | e3 | |
| Pbfree Code | no | |
| Part Status | Obsolete | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | |
| Number of Terminations | 8Terminations | |
| ECCN Code | EAR99 | |
| Type | Transceiver | |
| Terminal Finish | Matte Tin (Sn) | |
| Voltage - Supply | 4.75V~5.25V |
| Product Attribute | Attribute Value | |
|---|---|---|
| Terminal Position | DUAL | |
| Terminal Form | GULL WING | |
| Peak Reflow Temperature (Cel) | 260 | |
| Number of Functions | 1Function | |
| Supply Voltage | 5V | |
| Time@Peak Reflow Temperature-Max (s) | 30 | |
| Base Part Number | ADM485 | |
| Pin Count | 8 | |
| Operating Supply Voltage | 5V | |
| Power Supplies | 5V | |
| Operating Supply Current | 2.2mA | |
| Nominal Supply Current | 2.2mA | |
| Max Supply Current | 2.2mA | |
| Data Rate | 5Mbps | |
| Differential Output | YES | |
| Protocol | RS422, RS485 | |
| Input Characteristics | DIFFERENTIAL SCHMITT TRIGGER |
| Product Attribute | Attribute Value | |
|---|---|---|
| Number of Drivers/Receivers | 1/1Drivers/Receiver | |
| Driver Number of Bits | 1Bit | |
| Receiver Number of Bits | 1Bit | |
| Duplex | Half | |
| Receiver Hysteresis | 70mV | |
| Number of Transceivers | 1Transceiver | |
| ESD Protection | Yes | |
| Receive Delay-Max | 30 ns | |
| Simplex/Duplex | Half Duplex | |
| Output Low Current-Max | 0.004A | |
| Length | 4.9mm | |
| Width | 3.9mm | |
| Radiation Hardening | No | |
| RoHS Status | Non-RoHS Compliant | |
| Lead Free | Contains Lead |
Driver Enable or Disable
Driver Propagation Delay
Driver Voltage Measurement
Driver Voltage Measurement
Receiver Enable or Disable
Receiver Propagation Delay
1.Low power RS-485 systems
2.DTE/DCE interface
3.Packet switching
4.Local area networks (LNAs)
5.Data concentration
6.Data multiplexers
7.Integrated services digital network (ISDN)
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