Datasheet

2
LT1780/LT1781
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
Supply Voltage (V
CC
) ................................................ 6V
V
+
........................................................................ 13.2V
V
–
...................................................................... –13.2V
Input Voltage
Driver ........................................................... V
–
to V
+
Receiver ............................................... – 30V to 30V
ON/OFF ................................................. –0.3V to 12V
Output Voltage
Driver ...................................... V
+
– 30V to V
–
+ 30V
Receiver .................................... – 0.3V to V
CC
+ 0.3V
Short-Circuit Duration
V
+
................................................................... 30 sec
V
–
................................................................... 30 sec
Driver Output.............................................. Indefinite
Receiver Output.......................................... Indefinite
Operating Temperature Range ..................... 0°C to 70°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER
PART
NUMBER
ORDER
PART
NUMBER
LT1780CN
LT1780CSW
LT1781CN
LT1781CS
LT1781CSW
(Note 2)
E
LECTR
IC
AL C CHARA TERIST
ICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply Generator
V
+
Output 7.9 V
V
–
Output –7 V
Supply Current (V
CC
) (Note 3), T
A
= 25°C 8 10 mA
● 14 mA
Supply Current When OFF (V
CC
) SHUTDOWN (Note 4) LT1780 Only ● 110 µA
Supply Rise Time C1 = C2 = C3 = C4 = 0.1µF 0.2 ms
SHUTDOWN to Turn-On LT1780 Only 0.2 ms
ON/OFF Pin Thresholds Input Low Level (Device SHUTDOWN)
● 0.8 1.2 V
Input High Level (Device Enabled) ● 1.6 2.4 V
ON/OFF Pin Current 0V ≤ V
ON/OFF
≤ 5V ● –15 80 µA
Oscillator Frequency 130 kHz
Driver
Output Voltage Swing Load = 3k to GND Positive ● 5.0 7.5 V
Negative
● –6.3 – 5 V
Logic Input Voltage Level Input Low Level (V
OUT
= High) ● 1.4 0.8 V
Input High Level (V
OUT
= Low) ● 2.0 1.4 V
1
2
3
4
5
6
7
8
9
TOP VIEW
18
17
16
15
14
13
12
11
10

NC
C1
+

V
+

C1
–

C2
+

C2
–

V
–

TR2 OUT
REC2 IN
N PACKAGE
18-LEAD PLASTIC DIP
ON/OFF
V
CC

GND
TR1 OUT

REC1 IN

REC1 OUT
TR1 IN
TR2 IN
REC2 OUT
SW PACKAGE
18-LEAD PLASTIC SO
T
JMAX
= 125°C, θ
JA
= 80°C/W, θ
JC
= 36°C/W (N)
T
JMAX
= 125°C, θ
JA
= 90°C/W, θ
JC
= 26°C/W (SW)
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9

C1
+

V
+

C1
–

C2
+

C2
–

V
–

TR2 OUT
REC2 IN
V
CC
GND
TR1 OUT
REC1 IN

REC1 OUT

TR1 IN
TR2 IN
REC2 OUT
N PACKAGE
16-LEAD PLASTIC DIP
S PACKAGE
16-LEAD PLASTIC SO
SW PACKAGE
16-LEAD PLASTIC SO
T
JMAX
= 125°C, θ
JA
= 90°C/W, θ
JC
= 46°C/W (N)
T
JMAX
= 125°C, θ
JA
= 95°C/W, θ
JC
= 34°C/W (S)
T
JMAX
= 125°C, θ
JA
= 95°C/W, θ
JC
= 27°C/W (SW)
Consult factory for Industrial and Military grade parts.
(Note 1)