LTC6102CDD LINER [Linear Technology], LTC6102CDD Datasheet - Page 7

• Manufacturer Part Number: LTC6102CDD
• Description: Precision Zero Drift Current Sense Amplifi er
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
PIN FUNCTIONS
–INS (Pin 1): Amplifi er Inverting Input. When tied to –INF ,
the internal sense amplifi er will drive –INS to the same
potential as +IN.
–INF (Pin 2): Force Input. This pin carries the input
current from R
resistor (R
I
ternal R
V
OUT (Pin 4): Open-Drain Current output. OUT will source a
current that is proportional to the sense voltage into an ex-
OUT
–
5.5V
0.5V
(Pins 3, 5): Negative Supply.
5V
0V
= V
Step Response Rising Edge
V
OUT
SENSE
SENSE
V
IN
SENSE
) tied from V
.
/R
–
TIME (500ns/DIV)
= 100mV
IN
I
I
IN
OUT
OUT
and must be tied to –INS near R
. V
–1
–2
–3
–4
–5
= 0
= 100μA
5
4
3
2
1
0
0
SENSE
Input Referred Noise
0.1Hz to 10Hz
T
V
R
R
V
A
+
IN
OUT
SENSE
1
= 25°C
= 12V
= 10Ω
+
= 1k
T
V
R
R
V
to –INF sets the output current
2
A
= 2mV
+
IN
OUT
SENSE
is the voltage across the ex-
= 25°C
= 12V
= 100Ω
3
= 4.99k
+
6102 G17
= V
4
TIME (s)
+
5
6
5.5V
0.5V
7
5V
0V
Step Response Falling Edge
8
V
OUT
9
6102 G20
V
I
OUT
SENSE
10
IN
= 0
. A
–
TIME (500ns/DIV)
= 100mV
I
OUT
ternal resistor. I
V
larger) capacitor should be tied from V
not designed to drive external circuits.
V
through this pin.
+IN (Pin 8): Amplifi er Non-Inverting Input. Must be tied
to the system load end of the sense resistor.
Exposed Pad (Pin 9, DFN Only): V
must be soldered to PCB.
= 100μA
REG
+
(Pin 7): Positive Supply. Supply current is drawn
T
V
R
R
V
A
+
IN
OUT
SENSE
(Pin 6): Internal Regulated Supply. A 0.1μF (or
= 25°C
= 12V
= 100Ω
= 4.99k
2
1
0
100
+
Noise Spectral Density
6102 G18
= V
+
LTC6102/LTC6102HV
OUT
1k
is the same current that enters –INF .
FREQUENCY (Hz)
160
140
120
100
80
60
40
20
0.1
PSRR vs Frequency
10k
V
R
R
A
I
OUT
+
IN
OUT
V
= 12V
= 49.9
= 100Ω
1
= 500μA
= 4.99k
100k
10
FREQUENCY (Hz)
100
–
6102 G21
. The Exposed Pad
REG
1M
1k
to V
10k 100k
+
. V
6102 G19
REG
6102fb
1M
7
is