LTC6104 LINER [Linear Technology], LTC6104 Datasheet - Page 6

• Manufacturer Part Number: LTC6104
• Description: High Voltage, High Side, Bi-Directional Current Sense Amplifi er
• Manufacturer: LINER [Linear Technology]

LTC6104
PIN FUNCTIONS
OUT (Pin 1): Current Output. OUT will source or sink a
current that is proportional to the sense voltage into an
external resistor. A voltage reference is required to provide
the proper positive offset voltage so that the output can
swing both positive and negative.
V
Operation).
+INB/V
amplifi er B. It also works as the positive supply input.
Supply current is drawn through this pin.
–INB (Pin 6): The negative input of the internal sense
amplifi er B. The internal sense amplifi er will drive –INB
to the same potential as +INB when V
TYPICAL PERFORMANCE CHARACTERISTICS
6
5.5V
0.5V
–
6V
1V
(Pin 4): Negative Supply (or Ground for Single-Supply
Step Response Falling Edge
V
T
V
R
R
V
V
I
OUT
SENSE
A
S
IN
OUT
SENSE
REF
I
OUT
= 25°C
S
= 12V
= 100Ω
= –100µA
= 6V
= 5k
(Pin 5): The positive input of the internal sense
–
= 0µA
+
= V
S
TIME (1µs/DIV)
∆V
SENSE
–
= 100mV
V
OUT
6104 G19
SENSE
V
V
S
S
+ 50mV
– 50mV
4.5V
7V
2V
is negative.
Step Response Falling Edge
T
V
R
R
V
V
V
A
S
IN
OUT
SENSE
REF
SENSE
= 25°C
V
= 12V
= 100Ω
OUT
= 4.5V
= 5k
+
–
= V
S
TIME (1µs/DIV)
A resistor (R
the output current I
developed across the external R
–INA (Pin 7): The negative input of the internal sense
amplifi er A. The internal sense amplifi er will drive –INA
to the same potential as +INA when V
resistor (R
the output current I
+INA (Pin 8): The positive input of the internal sense
amplifi er A.
IN
6104 G20
IN
) tied from one end of R
) tied from one end of R
OUT
OUT
160
140
120
100
= V
80
60
40
20
= V
0
0.1
SENSE
PSRR vs Frequency
R
R
C
GAIN = 50
I
V
OUTDC
SENSE
IN
OUT
OUT
INAC
= 100Ω
1
= 5pF
= 5k
= 50mV
= 100µA
/R
SENSE
/R
10
IN
IN
P-P
FREQUENCY (Hz)
. V
.
100
SENSE
SENSE
SENSE
SENSE
(Figure 1).
V
V
+
+
= 4V
= 12V
1k
is the voltage
is positive. A
to –INA sets
to –INB sets
10k 100k
6104 G20
6104f
1M