LTM2881V-5 Просмотр технического описания (PDF) - Linear Technology
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LTM2881V-5 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
VL Supply Voltage
VCC Supply Current in Off Mode ON = 0V
l 1.62
5.5
V
l
0 10
µA
ICCS
VCC Supply Current in On Mode LTM2881-3 DE = 0V, RE = VL, No Load
LTM2881-5 DE = 0V, RE = VL, No Load
LTM2881-5, H/MP-Grade
l
20 25
mA
l
15 19
mA
l
20
mA
VCC2
Regulated VCC2 Output Voltage,
Loaded
VCC2NOLOAD Regulated VCC2 Output Voltage,
No Load
LTM2881-3 DE = 0V, RE = VL, ILOAD = 100mA
LTM2881-5 DE = 0V, RE = VL, ILOAD = 150mA
LTM2881-3, H/MP-Grade, ILOAD = 90mA
DE = 0V, RE = VL, No Load
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
%
200
mA
|VOD|
∆|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
∆|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 = 0V or VL, VIN = –7V, –3V, 3V, 7V, 12V (Figure 3)
l 96
125
kΩ
RE = 0V or VL, VIN = –7V, –3V, 3V, 7V, 12V (Figure 3),
l 48
125
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
∆VTH
Receiver Input Failsafe Hysteresis B = 0V
Receiver Input Failsafe Threshold B = 0V
25
mV
–0.2 –0.05 0
V
2881fh
4
For more information www.linear.com/LTM2881
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