NTE1764
Integrated Circuit
Infrared Preamplifier
Description:
The NTE1764 is an infrared preamplifier in a 14鈥揕ead DIP type package and contains four main parts:
the gain鈥揷ontrolled amplifier I, the amplifier II, the pulse鈥搒eparating amplifier III, and the inverter IV.
The amplifier I has a wide dynamic range and thus ensures interference free operation, also at bright
ambient light, 50Hz modulated light originating from fluorescent lamps, or at intensive infrared light,
e.g. produced by infrared sound transmission. It is also possible, to approach almost directly the re-
mote鈥揷ontrol transmitter to the receiver without producing misfunction by overdriving the receiver.
The amplifier II further amplifies the signal, and amplifier III separates the pulse鈥搒haped intelligence
signal from noise and other unwanted parts. The inverter IV provided additionally inverts the output
signal available at Pin7 as negative pulse, and thus delivers positive output pulses at Pin8. If an addi-
tional resistor is inserted between Pin6 and GND, the noise鈥搃mmunity is increased, but the input sen-
sitivity decreased. Pin10 serves as test pin and must not be connected.
The capacitor connected from Pin2 to GND influences the automatic gain control of amplifier I con-
tained in the NTE1764. A capacitance of less than 1碌F will cause misfunction in the distance range
of 0.2, to 2m.
Absolute Maximum Ratings:
(Note 1)
Supply Voltage, V
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Ambient Operating Temperature Range, T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?0擄 to +65擄C
Storage Temperature Range, T
S
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?0擄 to +125擄C
Recommended Operating Conditions:
(Note 1)
Parameter
Supply Voltage
Electrical Characteristics:
(V
3
= 5V, T
A
= +25擄C, Note 1)
Parameter
Symbol
Min
Typ
Max
Unit
Symbol Min Typ Max Unit
V
3
4.5 5.0 5.5
V
Current Consumption
Gain Between Pin14 & Pin7
Output Resistance Pin7 & Pin8, formed by the Pull鈥揢p of an
NPN Transistor
Output Low Voltage Pin7 & Pin8 at I
OL
= 1.6mA
IR Transmission Range using the SAA1250 IR Transmitter IC
and a Transmission Current Amplitude of 1.5A, and
One Transmitter Diode (NTE3017)
Two Transmitter Diodes (NTE3017)
Three Transmitter Diodes (NTE3017)
Note 1. All voltages are referred to GND (Pin1, Pin9, and Pin13).
I
2
G
R
O
V
OL
鈥?/div>
70
鈥?/div>
鈥?/div>
1
鈥?/div>
20
0.4
2
鈥?/div>
鈥?/div>
0.8
mA
dB
k鈩?/div>
V
L1
L2
L3
鈥?/div>
NTE1764 產品屬性
NTE
置換半導體
否
1
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