ADM2486 datasheet(3/20 Pages) AD

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ADM2486

Rev. C | Page 3 of 20

SPECIFICATIONS

2.7 V ≤ VDD1 ≤ 5.5 V, 4.75 V ≤ VDD2 ≤ 5.25 V, TA = TMIN to TMAX, unless otherwise noted.

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

DRIVER

Differential Outputs

Differential Output Voltage, VOD

R = ∞, see Figure 3

2.1

R = 50 Ω (RS-422), see Figure 3

2.1

R = 27 Ω (RS-485), see Figure 3

2.1

VTST = −7 V to 12 V, VDD1 ≥ 4.7,

see Figure 4

∆ |VOD| for Complementary Output States

0.2

R = 27 Ω or 50 Ω, see Figure 3

Common-Mode Output Voltage, VOC

R = 27 Ω or 50 Ω, see Figure 3

∆ |VOC| for Complementary Output States

0.2

R = 27 Ω or 50 Ω, see Figure 3

Output Short-Circuit Current, VOUT = High

200

−7 V ≤ VOUT ≤ +12 V

Output Short-Circuit Current, VOUT = Low

200

−7 V ≤ VOUT ≤ +12 V

Bus Enable Output

Output High Voltage

VDD2 − 0.1

IODE = 20 µA

VDD2 − 0.3

VDD2 − 0.1

IODE = 1.6 mA

VDD2 − 0.4

VDD2 − 0.2

IODE = 4 mA

Output Low Voltage

0.1

IODE = −20 µA

0.1

0.3

IODE = −1.6 mA

0.2

0.4

IODE = −4 mA

Logic Inputs

Input High Voltage

0.7 VDD1

TxD, RTS, RE, PV

Input Low Voltage

0.25 VDD1

TxD, RTS, RE, PV

CMOS Logic Input Current (TxD, RTS, RE, PV)

−10

0.01

µA

TxD, RTS, RE, PV = VDD1 or 0 V

RECEIVER

Differential Inputs

Differential Input Threshold Voltage, VTH

−200

200

−7 V ≤ VCM ≤ +12V

Input Hysteresis

−7 V ≤ VCM ≤ +12V

Input Resistance (A, B)

kΩ

−7 V ≤ VCM ≤ +12V

Input Current (A, B)

0.6

VIN = +12 V

−0.35

VIN = −7 V

RxD Logic Output

Output High Voltage

VDD1 − 0.1

IOUT = 20 µA, VA − VB = 0.2 V

VDD1 − 0.4

VDD1 − 0.2

IOUT = 4 mA, VA − VB = 0.2 V

Output Low Voltage

0.1

IOUT = −20 µA, VA − VB = −0.2 V

0.2

0.4

IOUT = −4 mA, VA − VB = −0.2 V

Output Short-Circuit Current

VOUT = GND or VCC

Three-State Output Leakage Current

±1

µA

0.4 V ≤ VOUT ≤ 2.4 V

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