ALD4302A/ALD4302 Advanced Linear Devices 6 of 9
Design & Operating Notes:
1. As each output sources up to 10mA in the output high state, the output stage of a wired-OR low output circuit must be able to sink this current and still
provide desired output voltage levels. For TTL output levels, this consideration limits the number to a maximum of three ALD4302 outputs wired-OR
together.
2. In order to minimize stray oscillation, all unused inputs must be tied to ground.
3. The input bias and offset currents are essentially input protection diode reverse bias leakage currents, and are typically less than 1pA at room temperature.
These currents are a function of ambient temperature, and would have to be considered in applications where very high source impedance or high accuracy
are involved.
4. The high output sinking current of 60mA for each output offers flexibility in many applications, as a separate buffer or driver would not be necessary to drive
the intended load. However, as the circuit normally operates close to ambient temperature due to its very low power consumption, thermal effects caused
by large output current transients must be considered in certain applications.
TIME DELAY GENERATOR
+
R
F4
V
3
1/4 ALD4302
1/4 ALD4302
R
F3
R
F2
V
+
R
F1
+
1/4 ALD4302
V
2
+
1/4 ALD4302
V
1
R
T
C
T
+
V
IN
V
+
V
REF
PUSH-PULL COMPLEMENTARY POWER MOSFET DRIVER
+
+
+12V
+12V
+12V
P- Channel VP 02
Power MOSFET
2A Source
2A Sink
N - Channel VN 01
Power MOSFET
+12V
10K
40K
10K
V
1
V
2
V
IN
1/4 ALD4302
1/4 ALD4302
This circuit eliminates crossover current in the
complementary power transistors. The outputs
can be used to source and sink different loads
or tied together to provide push-pull drive.
TYPICAL APPLICATIONS (cont'd)
