Datasheet LT6109-1, LT6109-2 (Analog Devices) - 8

LT6109-1/LT6109-2
TYPICAL PERFORMANCE CHARACTERISTICS Performance characteristics taken at TA = 25°C, V+ = 12V, VPULLUP = V+, VEN/RST = 2.7V, RIN = 100Ω, ROUT = R1 + R2 + R3 = 10k, gain = 100, RC = 25.5k, CL = CLC = 2pF, unless otherwise noted. (See Figure 3) Comparator Output Leakage Comparator Propagation Delay Comparator Rise/Fall Time Current vs Pull-Up Voltage vs Input Overdrive vs Pull-Up Resistor
23 5.0 10000 VOH = 0.9 • VPULLUP 4.5 VOL = 0.1 • VPULLUP 18 100mV INC1 OVERDRIVE 4.0 CL = 2pF 125°C RISE TIME 3.5 1000 13 3.0 2.5 ALL TIME (ns) 8 2.0 H TO L FALL TIME 1.5 RISE/F 100 3 1.0 –40°C AND 25°C OUTC1, OUTC2 LEAKAGE CURRENT (nA) L TO H COMPARATOR PROPAGATION DELAY (µs) 0.5 –2 0 10 0 10 20 30 40 50 60 0 40 80 120 160 200 1 10 100 1000 COMPARATOR OUTPUT PULL-UP VOLTAGE (V) COMPARATOR INPUT OVERDRIVE (mV) RC PULL-UP RESISTOR (kΩ) 610912 G28 610912 G30 610912 G29
Comparator Step Response Comparator Step Response (5mV INC1 Overdrive) (100mV INC1 Overdrive) Comparator Reset Response
VINC VINC 0.5V/DIV 0.5V/DIV 0V 0V VOUTC 5V/DIV 0V V V OUTC OUTC 2V/DIV 2V/DIV 0V 0V VEN/RST VEN/RST VEN/RST 2V/DIV 5V/DIV 5V/DIV 0V 0V 0V 5µs/DIV 5µs/DIV 5µs/DIV 610912 G31 610912 G32 610912 G33
PIN FUNCTIONS SENSELO (Pin 1):
Sense Amplifier Input. This pin must
OUTC2 (Pin 3):
Open-Drain Comparator 2 Output. Off- be tied to the load end of the sense resistor. state voltage may be as high as 60V above V–, regardless
EN/RST (Pin 2):
Enable and Latch Reset Input. When the of V+ used. EN/RST pin is pulled high the LT6109 is enabled. When the
OUTC1 (Pin 4):
Open-Drain Comparator 1 Output. Off- EN/RST pin is pulled low for longer than typically 40µs, state voltage may be as high as 60V above V–, regardless the LT6109 will enter the shutdown mode. Pulsing this pin of V+ used. low for between 2µs and 15µs will reset the comparators
V– (Pin 5):
Negative Supply Pin. This pin is normally con- of the LT6109. nected to ground. 610912fa 8 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 Revison History Typical Application Related Parts