LTM2881Y-3(RevA) Просмотр технического описания (PDF) - Linear Technology

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LTM2881Y-3
(Rev.:RevA)

Complete Isolated RS485/RS422 µModule Transceiver + Power

Linear Technology 

LTM2881

switching Characteristics The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. LTM2881-3 VCC = 3.3V, LTM2881-5 VCC = 5.0V, VL = 3.3V, GND = GND2 =

0V, ON = VL unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Receiver

tPLHR

tPHLR

tSKEWR

tRR

tFR

tZLR, tZHR,

tLZR, tHZR

tRTEN, tRTZ

Receiver Input to Output

Differential Receiver Skew

|tPLHR - tPHLR|

Receiver Output Rise or Fall Time

Receiver Output Enable Time

Termination Enable or Disable Time

CL = 15pF, VCM = 2.5V, |VAB| = 1.4V,

l

tR and tF < 4ns, (Figure 6)

CL = 15pF

l

(Figure 6)

CL = 15pF

l

(Figure 6)

RL =1kΩ, CL = 15pF

l

(Figure 7)

RE = 0V, DE = 0V, VAB = 2V, VB = 0V

l

(Figure 8)

100

140

ns

1

8

ns

3

12.5

ns

50

ns

100

µs

Generic Logic Input

tPLHL1

tPHLL1

DIN to DOUT Input to Output

Power Supply Generator

CL = 15pF,

tR and tF < 4ns

l

60

100

ns

VCC2–GND2 Supply Start-Up Time

(0V to 4.5V)

ON VL, No Load

l

325

800

µs

isolation Characteristics TA = 25°C, LTM2881-3 VCC = 3.3V, LTM2881-5 VCC = 5.0V, VL = 3.3V unless

otherwise noted.

SYMBOL

VISO

VIORM

PARAMETER

Rated Dielectric Insulation Voltage

Common Mode Transient Immunity

Maximum Working Insulation Voltage

Partial Discharge

Input to Output Resistance

Input to Output Capacitance

Creepage Distance

CONDITIONS

1 Minute (Derived from 1 Second Test)

1 Second

(Note 2)

(Note 2)

VPR = 1050 VPEAK (Note 2)

(Note 2)

(Note 2)

(Note 2)

MIN TYP MAX UNITS

2500

± 4400

30

VRMS

VDC

kV/µs

560

VPEAK

<5

pC

>109

Ω

6

pF

9.48

mm

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: Guaranteed by design and not subject to production test.

Note 3: Maximum Data rate is guaranteed by other measured parameters

and is not tested directly.

Note 4: This µModule transceiver includes over temperature protection

that is intended to protect the device during momentary overload

conditions. Junction temperature will exceed 125°C when over

temperature protection is active. Continuous operation above specified

maximum operating junction temperature may result in device degradation

or failure.

2881fa



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