ADM2795EARWZ datasheet(4/27 Pages) AD

부품명	ADM2795EARWZ

상세설명	Robust 5 kV RMS Isolated RS-485/RS-422 Transceiver with Level 4 EMC and Full 짹42 V Protection

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ADM2795E

Data Sheet

Rev. 0 | Page 4 of 27

Parameter

Symbol

Min

Typ

Max

Unit

Test Conditions/Comments

Logic Outputs

Output Voltage Low

V

OLRxD

0.2

V

I

ORxD = 3.0 mA, VA − VB = −0.2 V

Output Voltage High

V

OHRxD

V

DD1 − 0.2

V

I

ORxD = −3.0 mA, VA − VB = 0.2 V

Short-Circuit Current

100

mA

V

OUT = GND or VDD1, RE = 0 V

Three-State Output Leakage Current

I

OZR

±2

µA

RE = VDD1, RxD = 0 V or VDD1

COMMON-MODE TRANSIENT IMMUNITY2

75

125

kV/µs

V

CM ≥1 kV, transient magnitude

≥800 V

1 V

SC is the short-circuit voltage at the RS-485 A or B bus pin.

2 Common-mode transient immunity 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.

TIMING SPECIFICATIONS

VDD1 = 1.7 V to 5.5 V, VDD2 = 3.0 V to 5.5 V, TA = TMIN to TMAX (−40°C to +125°C), unless otherwise noted.

Table 2.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

DRIVER1

Maximum Data Rate

2.5

Mbps

Propagation Delay, t

DPLH, tDPHL

30

500

ns

R

LDIFF = 54 Ω, CL1 = CL2 = 100 pF, see Figure 29 and Figure 33

Differential Skew, t

SKEW

10

50

ns

R

LDIFF = 54 Ω, CL1 = CL2 = 100 pF, see Figure 29 and Figure 33

Rise/Fall Times, t

R, tF

40

130

ns

R

LDIFF = 54 Ω, CL1 = CL2 = 100 pF, see Figure 29 and Figure 33

Enable Time, t

ZH, tZL

500

2500

ns

R

L = 110 Ω, CL = 50 pF, see Figure 30 and Figure 35

Disable Time, t

HZ, tLZ

500

2500

ns

R

L = 110 Ω, CL = 50 pF, see Figure 30 and Figure 35

RECEIVER2

Propagation Delay, t

PLH, tPHL

120

200

ns

C

L = 15 pF, see Figure 31 and Figure 34, 10, VID ≥ ±1.5 V

140

220

ns

C

L = 15 pF, see Figure 31 and Figure 34, VID ≥ ±600 mV

Skew, t

SKEW

4

40

ns

C

L = 15 pF, see Figure 31 and Figure 34, VID ≥ ±1.5 V

Enable Time

10

50

ns

R

L = 1 kΩ, CL = 15 pF, see Figure 32 and Figure 36

Disable Time

10

50

ns

R

L = 1 kΩ, CL = 15 pF, see Figure 32 and Figure 36

RxD Pulse Width Distortion

40

ns

C

L = 15 pF, see Figure 31 and Figure 34, VID ≥ ±1.5 V

1 See Figure 29 for the definition of R

LDIFF.

2 Receiver propagation delay, skew, and pulse width distortion specifications are tested with a receiver differential input voltage (V

ID) of ≥±600 mV or ≥±1.5 V, as noted.

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Analog Devices	ADM2795EARWZ	752Kb / 28P	Robust 5 kV RMS Isolated RS-485/RS-422 Transceiver with Level 4 EMC and Full 짹42 V Protection Rev. B
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