
LTC6104
6
6104f
PIN FUNCTIONS
TYPICAL PERFORMANCE CHARACTERISTICS
Step Response Falling Edge
PSRR vs Frequency
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– (Pin 4): Negative Supply (or Ground for Single-Supply
Operation).
+INB/VS (Pin 5): The positive input of the internal sense
amplier 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
amplier B. The internal sense amplier will drive –INB
to the same potential as +INB when VSENSE is negative.
A resistor (RIN) tied from one end of RSENSE to –INB sets
the output current IOUT = VSENSE/RIN. VSENSE is the voltage
developed across the external RSENSE (Figure 1).
–INA (Pin 7): The negative input of the internal sense
amplier A. The internal sense amplier will drive –INA
to the same potential as +INA when VSENSE is positive. A
resistor (RIN) tied from one end of RSENSE to –INA sets
the output current IOUT = VSENSE/RIN.
amplier A.
Step Response Falling Edge
TIME (1
s/DIV)
7V
VS – 50mV
VS + 50mV
4.5V
2V
6104 G20
VSENSE
–
TA = 25°C
VS = 12V
RIN = 100
ROUT = 5k
VSENSE
+ = V
S
VREF = 4.5V
VOUT
FREQUENCY (Hz)
PSRR
(dB)
0.1
1
10
100
1k
10k
100k
1M
6104 G20
160
140
120
100
80
60
40
20
0
RIN = 100
ROUT = 5k
COUT = 5pF
GAIN = 50
IOUTDC = 100A
VINAC = 50mVP-P
V+ = 12V
V+ = 4V
TIME (1
s/DIV)
5.5V
6V
0.5V
1V
6104 G19
VSENSE
–
IOUT = –100A
IOUT = 0A
TA = 25°C
VS = 12V
RIN = 100
ROUT = 5k
VSENSE
+ = V
S
VREF = 6V
VSENSE– = 100mV
VOUT