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ADM3485E
(Rev.:2000)

ESD Protected, EMC Compliant, 3.3 V, 20 Mbps, EIA RS-485 Transceiver

Analog Devices 

ADM3485E–SPECIFICATIONS (VCC = +3.3 V ؎ 0.3 V. All specifications TMIN to TMAX unless otherwise noted.)

Parameter

Min

DRIVER

Differential Output Voltage, VOD

2.0

1.5

1.5

∆|VOD| for Complementary Output States

Common-Mode Output Voltage VOC

∆|VOC| for Complementary Output States

CMOS Input Logic Threshold Low, VINL

CMOS Input Logic Threshold High, VINH 2.0

Logic Input Current (DE, DI, RE)

Output Short Circuit Current

RECEIVER

Differential Input Threshold Voltage, VTH –0.2

Input Voltage Hysteresis, ∆VTH

Input Resistance

12

Input Current (A, B)

Logic Enable Input Current (RE)

Output Voltage Low, VOL

Output Voltage High, VOH

Short Circuit Output Current

Three-State Output Leakage Current

POWER SUPPLY CURRENT

ICC

VCC – 0.4 V

Supply Current in Shutdown

ESD/EFT IMMUNITY

ESD Protection

EFT Protection

Typ Max Units Test Conditions/Comments

V

V

V

0.2 V

3

V

0.2 V

0.8 V

V

± 1.0 µA

± 250 mA

RL = 100 Ω, Figure 1, VCC > 3.1 V

RL = 54 Ω, Figure 1

RL = 60 Ω, Figure 2, –7 V < VTST < +12 V

R = 54 Ω or 100 Ω, Figure 1

R = 54 Ω or 100 Ω, Figure 1

R = 54 Ω or 100 Ω, Figure 1

VO = –7 V or +12 V

+0.2 V

50

mV

19

kΩ

–7 V < VCM < +12 V

VCM = 0 V

–7 V < VCM < +12 V

+1

mA

–0.8 mA

±1

µA

VIN = +12 V

VIN = –7 V

0.4 V

V

± 60 mA

± 1.0 µA

IOUT = +2.5 mA

IOUT = –1.5 mA

VOUT = GND or VCC

VCC = 3.6 V, 0 V < VOUT < VCC

1

1.2

1

1.2

0.002 1

Outputs Unloaded,

mA DE = VCC, RE = 0 V

mA DE = 0 V, RE = 0 V

µA

DE = 0 V, RE = VCC

±8

kV

IEC1000-4-2 A, B Pins Contact Discharge

±2

kV

IEC1000-4-4, A, B Pins

Specifications subject to change without notice.

–2–

REV. A

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