ADM2491EBRWZ datasheet(3/16 Pages) AD

部件名	ADM2491EBRWZ

功能描述	High Speed, ESD-Protected, Half-/Full-Duplex Coupler Isolated RS-485 Transceiver

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制造商	AD [Analog Devices]

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ADM2491E

Rev. B | Page 3 of 16

SPECIFICATIONS

All voltages are relative to their respective ground; 3.0 V ≤ VDD1 ≤ 5.5 V, 4.5 V ≤ VDD2 ≤ 5.5 V. All minimum/maximum specifications

apply over the entire recommended operation range, unless otherwise noted. All typical specifications are at TA = 25°C, VDD1 = VDD2 =

5.0 V, unless otherwise noted.

Table 1.

Parameter

Symbol

Min

Typ

Max

Unit

Test Conditions

SUPPLY CURRENT

Power Supply Current, Logic Side

TxD/RxD Data Rate = 2 Mbps

I

DD1

3.0

mA

Unloaded output

TxD/RxD Data Rate = 16 Mbps

I

DD1

6

mA

Half-duplex configuration,

R

TERMINATION = 120 Ω, see Figure 5

Power Supply Current, Bus Side

TxD/RxD Data Rate = 2 Mbps

I

DD2

4.0

mA

Unloaded output

TxD/RxD Data Rate = 16 Mbps

I

DD2

50

mA

V

DD2 = 5.5 V, half-duplex

configuration,

R

TERMINATION = 120 Ω, see Figure 5

DRIVER

Differential Outputs

Differential Output Voltage, Loaded

|V

OD|

2.0

5.0

V

R

L = 100 Ω(RS-422), see Figure 3

1.5

5.0

V

R

L = 54 Ω (RS-485), see Figure 3

1.5

5.0

V

−7 V ≤ V

TEST1 ≤ 12 V, see Figure 4

∆|V

OD| for Complementary Output

States

∆|V

OD|

0.2

V

R

L = 54 Ωor 100 Ω, see Figure 3

Common-Mode Output Voltage

V

OC

3.0

V

R

L = 54 Ωor 100 Ω, see Figure 3

∆|V

OC| for Complementary Output

States

∆|V

OC|

0.2

V

R

L = 54 Ωor 100 Ω, see Figure 3

Output Leakage Current (Y, Z)

I

O

100

µA

DE = 0 V, V

DD2 = 0 V or 5 V, VIN = 12 V

−100

µA

DE = 0 V, V

DD2 = 0 V or 5 V, VIN = −7 V

Short-Circuit Output Current

I

OS

250

mA

Logic Inputs DE, RE, TxD

Input Threshold Low

V

IL

0.25 × V

DD1

V

Input Threshold High

V

IH

0.7 × V

DD1

V

Input Current

I

TxD

−10

+0.01

+10

µA

RECEIVER

Differential Inputs

Differential Input Threshold Voltage

V

TH

−0.2

+0.2

V

Input Voltage Hysteresis

V

HYS

30

mV

V

OC = 0 V

Input Current (A, B)

I

+1.0

mA

V

OC = 12 V

−0.8

mA

V

OC = −7 V

Line Input Resistance

R

IN

12

kΩ

Logic Outputs

Output Voltage Low

V

OLRxD

0.2

0.4

V

I

ORxD = 1.5 mA, VA − VB = −0.2 V

Output Voltage High

V

OHRxD

V

DD1 − 0.3

V

DD1 − 0.2

V

I

ORxD = −1.5 mA, VA − VB = 0.2 V

Short-Circuit Current

100

mA

Three-State Output Leakage Current

I

OZR

±1

µA

V

DD1 = 5.5 V, 0 V < VOUT < VDD1

COMMON-MODE TRANSIENT IMMUNITY1

25

kV/µs

V

CM = 1 kV, transient magnitude =

800 V

1 CM is the maximum common-mode voltage slew rate that can be sustained while maintaining specification-compliant operation. V

CM is the common-mode potential

difference between the logic and bus sides. The transient magnitude is the range over which the common mode is slewed. The common-mode voltage slew rates

apply to both rising and falling common-mode voltage edges.

类似零件编号 - ADM2491EBRWZ

制造商	部件名	数据表	功能描述
Analog Devices	ADM2491EBRWZ	423Kb / 16P	High Speed, ESD-Protected, Half-/Full-Duplex iCoupler Isolated RS-485 Transceiver Rev. C
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