Datasheet

13
LT1492/LT1493
SI PLIFIED SCHE ATIC
WW
C
I
Q5
Q10
C
F
R
F
I
7
I
8
C
O
V
–
C
M
BIAS
OUT
V
+
I
6
I
5
I
4
I
3
I
2
I
1
–IN
+IN
1492/93 SS
Q7
Q9
Q8
Q11
Q12
Q14
Q15
Q13
Q16
Q6
Q3
Q4
Q1
Q2
Ground Current Sense Amplifier
TYPICAL APPLICATIONS
U
–
+
V
IN
V
+
1/2
LT1492
R
L
I
OUT
1492/93 TA05
1k
1k
1k
1k
100Ω
200pF
I
OUT
=
V
IN

1Ω
t
r
< 1µs
Si9430DY
P-CHANNEL
1Ω
–
+
V
IN
V
+
1/2
LT1492
R
L
I
OUT
1492/93 TA06
1k
100Ω
100pF
Si9410DY
N-CHANNEL
1Ω
V
+
I
OUT
=
V
IN

1Ω
t
r
< 1µs
1A Voltage-Controlled Current Source 1A Voltage-Controlled Current Sink
–
+
5V
1/2
LT1492
I
IN
1492/93 TA07
V
O
= 1V/A
100Ω
V
+
1910Ω
100pF
LOAD
0.05Ω
OFFSET ≤ 3.6mA
BANDWIDTH = 250kHz
t
r
= 1µs
0.1µF