Datasheet
LTC1535
3
1535fb
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
V
CC
Supply Range
l
4.5 5.5 V
V
CC2
V
CC2
Supply Range
l
4.5 7.5 V
I
CC
V
CC
Supply Current Transformer Not Driven (Note 10)
l
13 28 mA
I
CC2
V
CC2
Supply Current R = 27Ω, Figure 2
No Load
l
l
63
7
73
12
mA
mA
V
OD1
Differential Driver Output No Load
l
5V
V
OD2
Differential Driver Output R = 50Ω (RS422) (Note 2), V
CC2
= 4.5V
R = 27Ω(RS485), Figure 2, V
CC2
= 4.5V
l
l
2
1.5 2
V
V
V
OC
Driver Output Common Mode Voltage DC Level, R = 50Ω, Figure 2
l
2.0 2.5 3.0 V
I
OSD1
Driver Short-Circuit Current
V
OUT
= HIGH
V
OUT
= LOW
Driver Enabled (DE = 1)
–7V ≤ V
CM
≤ 10V
–7V ≤ V
CM
≤ 10V
l
l
60
60
100
100
150
150
mA
mA
V
IH
Logic Input High Voltage DE, DI, RE
SLO
l
l
2
4
1.7
2.2
V
V
V
IL
Logic Input Low Voltage DE, DI, RE
SLO
l
l
1.7
1.8
0.8
1
V
V
I
IN
Input Current (A, B) (Note 3) V
IN
= 12V
l
0.25
mA
V
IN
= –7V
l
–0.20
mA
V
TH
Receiver Input Threshold –7V ≤ V
CM
≤ 12V, (Note 4)
l
–200 –90 –10 mV
ΔV
TH
Receiver Input Hysteresis –7V ≤ V
CM
≤ 12V 0°C ≤ T
A
≤ 70°C
l
10 30 70 mV
–40°C ≤ T
A
≤ 85°C
l
53070 mV
R
IN
Receiver Input Impedance
l
50 68 100 kΩ
V
IOC
Receiver Input Open Circuit Voltage 3.4 V
V
OH
RO Output High Voltage I
RO
= –4mA, V
CC
= 4.5V
l
3.7 4.0 V
V
OL
RO Output Low Voltage I
RO
= 4mA, V
CC
= 4.5V
l
0.4 0.8 V
I
OZ
Driver Output Leakage Driver Disabled (DE = 0) 1 μA
V
OH2
RO2 Output High Voltage I
RO2
= –4mA, V
CC
= 4.5V
l
3.7 3.9 V
V
OL2
RO2 Output Low Voltage I
RO2
= 4mA, V
CC
= 4.5V
l
0.4 0.8 V
f
SW
DC Converter Frequency
l
290 420 590 kHz
R
SWH
DC Converter Impedance High
l
46 Ω
R
SWL
DC Converter Impedance Low
l
2.5 5 Ω
I
REL
RE Output Low Current RE Sink Current, Fault = 0
l
–40 –50 –80 μA
I
REH
RE Output High Current RE Source Current, Fault = 1
l
80 100 130 μA
V
UVL
Undervoltage Low Threshold RE Fault = 1, (Note 5)
l
3.70 4.00 4.25 V
V
UVH
Undervoltage High Threshold RE Fault = 0, (Note 5)
l
4.05 4.20 4.40 V
V
ISO
Isolation Voltage 1 Minute, (Note 6)
1 Second
2500
3000
V
RMS
V
RMS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
CC
= 5V, V
CC2
= 5V unless otherwise noted.