• ADM1485ARZ
  • ADM1485ARZ
  • ADM1485ARZ
  • ADM1485ARZ
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The ADM1485 is a differential line transceiver suitable for high speed bidirectional data communication on multipoint bus transmission lines. It is designed for balanced data transmission and complies with both EIA Standards RS-485 and RS-422. The part contains a differential line driver and a differential line receiver. Both the driver and the receiver may be enabled independently. When disabled, the outputs are tristated. The ADM1485 operates from a single +5 V power supply. Excessive power dissipation caused by bus contention or by output shorting is prevented by a thermal shutdown circuit. This feature forces the driver output into a high impedance state if during fault conditions a significant temperature increase is detected in the internal driver circuitry. Up to 32 transceivers may be connected simultaneously on a bus, but only one driver should be enabled at any time. It is important therefore that the remaining disabled drivers do not load the bus. To ensure this, the ADM1485 driver features high output impedance when disabled and also when powered down. This minimizes the loading effect when the transceiver is not being utilized. The 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 which results in a logic high output state if the inputs are unconnected (floating). The ADM1485 is fabricated in BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology. All inputs and outputs contain protection against ESD; all driver outputs feature high source and sink current capability. An epitaxial layer is used to guard against latch-up. The ADM1485 features extremely fast switching speeds. Minimal driver propagation delays permit transmission at data rates up to 30 Mbits/s while low skew minimizes EMI interference. The part is fully specified over the commercial and industrial temperature range and is available in an 8-pin DIL/SOIC package.

Количество в упаковке98
Вес0.15 г
supply_voltage_dc4.75 V (min)
data_rate30.0 Mbps
power_dissipation450 mW
reach_svhc_complianceNo SVHC
lead_free_statusContains Lead
mounting_styleSurface Mount
supply_current2.20 mA
Device TypeRS485 Transceiver
IC Interface TypeRS485
No. of Drivers1Drivers
No. of Receivers1Receivers
Supply Voltage Min4.75V
Supply Voltage Max5.25V
Driver Case StyleSOIC
No. of Pins8Pins
Operating Temperature Min-40°C
Operating Temperature Max85°C
Product RangeADM1485 Series
Automotive Qualification Standard-
MSLMSL 1 - Unlimited
IC Generic NumberADM1485
SVHCNo SVHC (07-Jul-2017)
RoHS Phthalates CompliantYes
Base Number1485
Data Rate30Mbps
IC Temperature RangeCommercial
Line, Bus Drive, Receive, Transceiver TypeLow Power Differential
Logic Function Number1485
Operating Temperature Range-40°C to +85°C
Supply Current1mA
Supply Voltage Range4.75V to 5.25V
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