Datasheet LTC6103 (Analog Devices) - 6

LTC6103
PIN FUNCTIONS OUTA (Pin 1):
Current Output of Amplifi er A. OUTA will
–INB (Pin 6):
The Negative Input of the Internal Sense source a current that is proportional to the sense voltage Amplifi er B. The internal sense amplifi er will drive –INB of amplifi er A into an external resistor. to the same potential as +INB. A resistor (RIN) tied from V + to –INB sets the output current I
OUTB (Pin 2):
Current Output of Amplifi er B. OUTB will B OUT = VSENSE/ RIN. V source a current that is proportional to the sense voltage SENSE is the voltage developed across the external RSENSE (Figure 1). of amplifi er B into an external resistor.
–INA (Pin 7):
The Negative Input of the Internal Sense
NC (Pin 3):
No Connect. Amplifi er A. The internal sense amplifi er will drive –INA
V– (Pin 4):
Negative Supply (or Ground for Single Supply to the same potential as +INA. A resistor (RIN) tied from Operation). Common to both amplifi ers. V + A to –INA sets the output current IOUT = VSENSE/ RIN.
+INB/V
V
SB (Pin 5):
The Positive Input of the Internal Sense SENSE is the voltage developed across the external RSENSE Amplifi er B. Must be tied to the system load end of the (Figure 1). sense resistor. It also works as the positive supply for
+INA/VSA (Pin 8):
The Positive Input of the Internal Sense amplifi er B. Supply current of amplifi er B is drawn through Amplifi er A. Must be tied to the system load end of the this pin.
The LTC6103 supply current is monitored along
sense resistor. It also works as the positive supply for
with the system load current.
amplifi er A. Supply current of amplifi er A is drawn through this pin.
The LTC6103 supply current is monitored along with the system load current. BLOCK DIAGRAM
V + + A VB V V SENSE SENSE ILOAD – + + – ILOAD RSENSE RSENSE LOAD LOAD RIN RIN 8 7 6 5 +INA –INA –INB +INB 5k 5k 5k 5k ISA + – – + ISB V V SA SB 10V 10V OUTA V– OUTB 1 4 2 6103 F01 I I OUT OUT ROUT VOUT = VSENSE • R R OUT R IN OUT
Figure 1. LTC6103 Block Diagram and Typical Connection
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