LTC1041MJ8 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1041MJ8 Datasheet PDF : 8 Pages
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LTC1041
TYPICAL PERFOR A CE CHARACTERISTICS
VP-P Output Voltage
vs Load Current
0
0.2
0.4
V+ = 16V
0.6
V+ = 10V
0.8
1.0
V+ = 2.8V
1.2
1.4
V+ = 5V
1.6
1.8
2.0
0 1 2 3 4 5 6 7 8 9 10
LOAD CURRENT, IL (mA)
LTC1041 • TPC06
RIN vs Sampling Frequency
1011
1010
109
108
107
1
10
102
103
104
SAMPLING FREQUENCY fS (Hz)
LTC1041 • TPC07
APPLICATIO S I FOR ATIO
The LTC1041 uses sampled data techniques to achieve
its unique characteristics. It consists of two comparators,
each of which has two differential inputs (Figure 1a).
When the sum of the voltages on a comparator’s inputs is
positive, the output is high and when the sum is negative,
the output is low. The inputs are interconnected such that
VIN
(2)
+
–
+ COMP A
–
4
V+
(8)
ON/OFF
(1)
the RS flip-flop is reset (ON/OFF = GND) when
VIN > (SET POINT + DELTA) and is set (ON/OFF = V+) when
VIN < (SET POINT – DELTA). This makes a very precise
hysteresis loop of 2 • DELTA centered around the
SET POINT. (See Figure 1b.)
For RS < 10kΩ
The dual differential input structure is made with CMOS
switches and a precision capacitor array. Input
impedance characteristics of the LTC1041 can be
determined from the equivalent circuit shown in Figure 2.
The input capacitance will charge with a time constant of
SET POINT
(3)
DELTA
(5)
V+
GND
(4)
REXT
OSC
(6)
CEXT
+
–
+ COMP B
–
4
TIMING
GENERATOR
POWER ON
80µs
(a)
4
SET POINT
DELTA – +DELTA
V+
V+
VP-P
VP-P
CIRCUIT
(7)
LTC1041 • AI01a
GND
0V
Figure 1. LTC1041 Block Diagram
DEADBAND
VL
VU
INPUT VOLTAGE, VIN
LTC1041 • AI01b
(b)
1041fa
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