Datasheet LT6108-1, LT6108-2 (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | High Side Current Sense Amplifier with Reference and Comparator |
| Pages / Page | 30 / 10 — TYPICAL PERFORMANCE CHARACTERISTICS. Performance characteristics taken at … |
| File Format / Size | PDF / 361 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Performance characteristics taken at TA = 25°C,
Model Line for this Datasheet
- LT6108AHMS8-1#PBF LT6108AHMS8-1#PBF LT6108AHMS8-1#TRPBF LT6108AHMS8-1#TRPBF LT6108AHMS8-2#PBF LT6108AHMS8-2#PBF LT6108AHMS8-2#TRPBF LT6108AHMS8-2#TRPBF LT6108AIMS8-1#PBF LT6108AIMS8-1#PBF LT6108AIMS8-1#TRPBF LT6108AIMS8-1#TRPBF LT6108AIMS8-2#PBF LT6108AIMS8-2#PBF LT6108AIMS8-2#TRPBF LT6108AIMS8-2#TRPBF LT6108HDCB-1#PBF LT6108HDCB-1#TRMPBF LT6108HDCB-1#TRMPBF LT6108HDCB-1#TRPBF LT6108HDCB-1#TRPBF LT6108HDCB-2#PBF LT6108HDCB-2#TRMPBF LT6108HDCB-2#TRMPBF LT6108HDCB-2#TRPBF LT6108HDCB-2#TRPBF LT6108HMS8-1#PBF LT6108HMS8-1#PBF LT6108HMS8-1#TRPBF LT6108HMS8-1#TRPBF LT6108HMS8-2#PBF LT6108HMS8-2#PBF LT6108HMS8-2#TRPBF LT6108HMS8-2#TRPBF LT6108IDCB-1#PBF LT6108IDCB-1#TRMPBF LT6108IDCB-1#TRMPBF LT6108IDCB-1#TRPBF LT6108IDCB-1#TRPBF LT6108IDCB-2#PBF LT6108IDCB-2#TRMPBF LT6108IDCB-2#TRMPBF LT6108IDCB-2#TRPBF LT6108IDCB-2#TRPBF LT6108IMS8-1#PBF LT6108IMS8-1#PBF LT6108IMS8-1#TRPBF LT6108IMS8-1#TRPBF LT6108IMS8-2#PBF LT6108IMS8-2#PBF LT6108IMS8-2#TRPBF LT6108IMS8-2#TRPBF
Text Version of Document
LT6108-1/LT6108-2
TYPICAL PERFORMANCE CHARACTERISTICS Performance characteristics taken at TA = 25°C, V+ = 12V, VPULLUP = V+, VEN = VEN/RST = 2.7V, RIN = 100Ω, ROUT = R1 + R2 = 10k, gain = 100, RC = 25.5k, CL = CLC = 2pF, unless otherwise noted. (See Figure 3) LT6108-2 Comparator Step LT6108-2 Comparator Step LT6108-1 Comparator Reset Response (5mV INC Overdrive) Response (100mV INC Overdrive) Response
V+ = 5V V+ = 5V VINC VINC 0.5V/DIV 0.5V/DIV 0V 0V VOUTC 5V/DIV 0V VOUTC VOUTC 1V/DIV 1V/DIV VEN/RST 0V 0V 2V/DIV 0V 5µs/DIV 5µs/DIV 5µs/DIV 610812 G35 610812 G36 610812 G37
PIN FUNCTIONS SENSELO (Pin 1):
Sense Amplifier Input. This pin must
OUTA (Pin 6):
Current Output of the Sense Amplifier. This be tied to the load end of the sense resistor. pin will source a current that is equal to the sense voltage
EN/RST (Pin 2, LT6108-1 Only):
Enable and Latch Reset divided by the external gain setting resistor, RIN. Input. When the EN/RST pin is pulled high the LT6108-1
V+ (Pin 7):
Positive Supply Pin. The V+ pin can be con- is enabled. When the EN/RST pin is pulled low for longer nected directly to either side of the sense resistor, RSENSE. than typically 40µs, the LT6108-1 will enter the shutdown When V+ is tied to the load end of the sense resistor, the mode. Pulsing this pin low for between 2µs and 15µs will SENSEHI pin can go up to 0.2V above V+. Supply current reset the comparator of the LT6108-1. is drawn through this pin.
EN (Pin 2, LT6108-2 Only):
Enable Input. When the en-
SENSEHI (Pin 8):
Sense Amplifier Input. The internal able pin is pulled high the LT6108-2 is enabled. When the sense amplifier will drive SENSEHI to the same potential enable pin is pulled low for longer than typically 40µs, the as SENSELO. A resistor (typically RIN) tied from supply LT6108-2 will enter the shutdown mode to SENSEHI sets the output current, IOUT = VSENSE/RIN,
OUTC (Pin 3):
Open-Drain Comparator Output. Off-state where VSENSE is the voltage developed across RSENSE. voltage may be as high as 60V above V–, regardless of
Exposed Pad (Pin 9, DCB Package Only):
V–. The exposed V+ used. pad may be left open or connected to device V–. Connect-
V– (Pin 4):
Negative Supply Pin. This pin is normally con- ing the exposed pad to a V– plane will improve thermal nected to ground. management in high voltage applications. The exposed pad should not be used as the primary connection for V–.
INC (Pin 5):
This is the inverting input of the comparator. The other comparator input is internally connected to the 400mV reference. 610812fa 10 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagrams Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Performance characteristics taken at TA = 25°C, V+ = 12V, VPULLUP = V+, VEN = VEN/RST = 2.7V, RIN = 100Ω, ROUT = R1 + R2 = 10k, gain = 100, RC = 25.5k, CL = CLC = 2pF, unless otherwise noted. (See Figure 3) LT6108-2 Comparator Step LT6108-2 Comparator Step LT6108-1 Comparator Reset Response (5mV INC Overdrive) Response (100mV INC Overdrive) Response
V+ = 5V V+ = 5V VINC VINC 0.5V/DIV 0.5V/DIV 0V 0V VOUTC 5V/DIV 0V VOUTC VOUTC 1V/DIV 1V/DIV VEN/RST 0V 0V 2V/DIV 0V 5µs/DIV 5µs/DIV 5µs/DIV 610812 G35 610812 G36 610812 G37
PIN FUNCTIONS SENSELO (Pin 1):
Sense Amplifier Input. This pin must
OUTA (Pin 6):
Current Output of the Sense Amplifier. This be tied to the load end of the sense resistor. pin will source a current that is equal to the sense voltage
EN/RST (Pin 2, LT6108-1 Only):
Enable and Latch Reset divided by the external gain setting resistor, RIN. Input. When the EN/RST pin is pulled high the LT6108-1
V+ (Pin 7):
Positive Supply Pin. The V+ pin can be con- is enabled. When the EN/RST pin is pulled low for longer nected directly to either side of the sense resistor, RSENSE. than typically 40µs, the LT6108-1 will enter the shutdown When V+ is tied to the load end of the sense resistor, the mode. Pulsing this pin low for between 2µs and 15µs will SENSEHI pin can go up to 0.2V above V+. Supply current reset the comparator of the LT6108-1. is drawn through this pin.
EN (Pin 2, LT6108-2 Only):
Enable Input. When the en-
SENSEHI (Pin 8):
Sense Amplifier Input. The internal able pin is pulled high the LT6108-2 is enabled. When the sense amplifier will drive SENSEHI to the same potential enable pin is pulled low for longer than typically 40µs, the as SENSELO. A resistor (typically RIN) tied from supply LT6108-2 will enter the shutdown mode to SENSEHI sets the output current, IOUT = VSENSE/RIN,
OUTC (Pin 3):
Open-Drain Comparator Output. Off-state where VSENSE is the voltage developed across RSENSE. voltage may be as high as 60V above V–, regardless of
Exposed Pad (Pin 9, DCB Package Only):
V–. The exposed V+ used. pad may be left open or connected to device V–. Connect-
V– (Pin 4):
Negative Supply Pin. This pin is normally con- ing the exposed pad to a V– plane will improve thermal nected to ground. management in high voltage applications. The exposed pad should not be used as the primary connection for V–.
INC (Pin 5):
This is the inverting input of the comparator. The other comparator input is internally connected to the 400mV reference. 610812fa 10 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagrams Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
