LTM2881HV-5-PBF(RevE) Просмотр технического описания (PDF) - Linear Technology
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LTM2881HV-5-PBF
(Rev.:RevE)
(Rev.:RevE)
Linear Technology
LTM2881HV-5-PBF Datasheet PDF : 24 Pages
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LTM2881
ELECTRICAL 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
Power Supply
VCC
VCC Supply Voltage
LTM2881-3
LTM2881-5
l 3.0
3.3 3.6
V
l 4.5
5.0 5.5
V
VL
ICCPOFF
ICCS
VL Supply Voltage
VCC Supply Current in Off Mode
VCC Supply Current in On Mode
VCC2
Regulated VCC2 Output Voltage,
Loaded
VCC2NOLOAD Regulated VCC2 Output Voltage,
No Load
ON = 0V
LTM2881-3
LTM2881-5
DE
DE
=
=
0V,
0V,
RE
RE
=
=
VL
VL
,
,
No
No
Load
Load
LTM2881-5, H/MP-Grade
LTM2881-3
LTM2881-5
DE
DE
=
=
0V,
0V,
RE
RE
=
=
VL,
VL,
ILOAD
ILOAD
=
=
100mA
150mA
LTM2881-3, H/MP-Grade, ILOAD = 90mA
DE = 0V, RE = VL, No Load
l 1.62
5.5
V
l
0 10
μA
l
20 25
mA
l
15 19
mA
l
20
mA
l 4.75 5.0
V
l 4.75 5.0
V
l 4.75
V
4.8 5.0 5.35
V
ICC2S
Driver
Efficiency
VCC2 Short-Circuit Current
ICC2 = 100mA, LTM2881-5 (Note 2)
DE = 0V, RE = VL, VCC2 = 0V
62
%
l
250
mA
|VOD|
Δ|VOD|
Differential Driver Output Voltage R = ∞ (Figure 1)
R = 27Ω (RS485) (Figure 1)
R = 50Ω (RS422) (Figure 1)
Difference in Magnitude of Driver R = 27Ω or R = 50Ω (Figure 1)
Differential Output Voltage for
Complementary Output States
l
l 2.1
l 2.1
l
VCC2
V
VCC2
V
VCC2
V
0.2
V
VOC
Driver Common Mode Output R = 27Ω or R = 50Ω (Figure 1)
Voltage
l
3
V
Δ|VOC|
Difference in Magnitude of Driver R = 27Ω or R = 50Ω (Figure 1)
Common Mode Output Voltage
for Complementary Output States
l
0.2
V
IOZD
Driver Three-State (High
DE = 0V, (Y or Z) = –7V, +12V
l
Impedance) Output Current on DE = 0V, (Y or Z) = –7V, +12V, H/MP-Grade
l
Y and Z
±10
μA
±50
μA
IOSD
Maximum Driver Short-Circuit – 7V ≤ (Y or Z) ≤ 12V (Figure 2)
Current
l – 250
250
mA
Receiver
RIN
Receiver Input Resistance
RE
RE
=
=
0V
0V
or
or
VL
VL
,
,
VIN
VIN
=
=
–7V,
–7V,
–
–
3V,
3V,
3V,
3V,
7V,
7V,
12V
12V
(Figure
(Figure
3)
3),
l 96
125
l 48
125
kΩ
kΩ
H/MP-Grade
RTE
Receiver Termination Resistance TE = VL, VAB = 2V, VB = – 7V, 0V, 10V (Figure 8)
Enabled
l 108 120 156
Ω
IIN
Receiver Input Current (A, B)
ON = 0V VCC2 = 0V or 5V, VIN = 12V (Figure 3)
l
ON = 0V VCC2 = 0V or 5V, VIN = 12V (Figure 3), H/MP-Grade l
ON = 0V VCC2 = 0V or 5V, VIN = –7V (Figure 3)
ON = 0V VCC2 = 0V or 5V, VIN = –7V (Figure 3), H/MP-Grade
l –100
l –145
VTH
Receiver Differential Input
–7V ≤ B ≤ 12V
Threshold Voltage (A-B)
l –0.2
125
μA
250
μA
0.2
V
ΔVTH
Receiver Input Failsafe Hysteresis B = 0V
Receiver Input Failsafe Threshold B = 0V
25
mV
–0.2 –0.05 0
V
2881fe
3
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