ADM483 5 V, Slew-Rate Limited, Low Power, 250 kbps, Half Duplex RS-485/RS-422 Transceiver

The ADM483 is a low power differential line transceiver suitable for half-duplex data communication on multipoint bus trans-mission lines. It is designed for balanced data transmission, and complies with EIA Standards RS-485 and RS-422.The part contains a differential line driver and a differential line receiver. Both share the same differential pins, with either the driver or the receiver being enabled at any given time.

The device has an input impedance of 12 kΩ, allowing up to 32 transceivers on one bus. Since only one driver should be enabled at any time, the output of a disabled or powered-down driver is three-stated to avoid overloading the bus. This high impedance driver output is maintained over the entire common-mode voltage range from –7 V to +12 V.

The receiver contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating).

The driver outputs are slew-rate limited to reduce EMI and data errors caused by reflections from improperly terminated buses. Excessive power dissipation caused by bus contention or by output shorting is prevented by a thermal shutdown circuit.

The part is fully specified over the industrial temperature range, and is available in an 8-lead SOIC package.

Features and Benefits

EIA RS-485/RS-422-compliant
Data Rates up to 250 kbps
Slew-rate Limited for Low EMI
100 nA Supply Current in Shutdown Mode
Low Power Consumption (120 µA)
Up to 32 Transceivers on one Bus
Outputs High-z When Disabled or Powered Off

–7 V to +12 V Bus Common-mode Range
Thermal Shutdown and Short-circuit Protection
Pin-compatible with MAX483
Specified over –40°C to +85°C Temperature Range
Available in 8-lead SOIC Package

Interface & Isolation

Interface RS-485 and RS-422

Data Sheets

Document	note
ADM483: 5 V Low Power, Slew-Rate Limited RS-485/RS-422 Transceiver Data Sheet (Rev. 0)	PDF 303 kB

Application Notes

Document	note
AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format (Rev. 0)	PDF 671 kB
AN-960: RS-485/RS-422 Circuit Implementation Guide (Rev. 0)	PDF 245 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADM483AR Obsolete	8 ld SOIC	OTH 98		0	0	N
ADM483AR-REEL7 Obsolete	8 ld SOIC	REEL 1000		0	0	N
ADM483ARZ Production	8 ld SOIC	OTH 98	-40 to 85C	0.76	0.69	Y
ADM483JR Obsolete	8 ld SOIC	OTH 98		0	0	N
ADM483JR-REEL7 Obsolete	8 ld SOIC	REEL 1000		0	0	N
ADM483JRZ Production	8 ld SOIC	OTH 98	0 to 70C	0.74	0.67	Y