NCS36000DG ON Semiconductor, NCS36000DG Datasheet - Page 4

• Manufacturer Part Number: NCS36000DG
• Description: Op Amps PIR ASSP
• Manufacturer: ON Semiconductor

Specifications of NCS36000DG

• Lead Free Status / Rohs Status: Details

Oscillator
the system clock frequency. Multiple clock frequencies can
be selected using different combinations of resistors and
capacitors. Figure 2 shows a simplifier block diagram for
the system oscillator.
LDO Regulator
sensor and all other analog blocks within the system. The
nominal voltage reference for the sensor is 2.7 V ±5%. An
external capacitor is needed on the VREF pin to guarantee
stability of the regulator.
Differential Amplifiers
bandpass filter to condition the PIR sensor signal for the post
Figure 2. Block Diagram of System Oscillator Circuit
The oscillator uses an external resistor and capacitor to set
The LDO regulator provides the reference voltage for the
The two differential amplifiers can be configured as a
VDD
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Figure 4. Plot Showing Functionality of Window Comparator for an Analog Input OP2_O
OSC
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+
+
−
−
Vdd
Vss
Vdd
Vss
Vm
Vh
Vl
S
R
SET
CLR
Q
Q
OP2_O
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Comp_P
Comp_N
4
digital signal processing. The cutoff frequencies and
passband gain are set by the external components. See
Figure 5.
Window Comparator
second differential amplifier to two reference voltages from
the LDO regulator. COMP_P triggers if OP2_O is greater
than the Vh voltage and COMP_N triggers if OP2_O is
lower than the Vl voltage. See Figures 4 and 5.
Figure 3. Plot Showing Typical Magnitude Response
The window comparator compares the voltage from the
of Differential Amplifiers When Configured as a
80
70
60
50
40
30
20
10
−1
Bandpass Filter
10
0
10
1