NTE NTE1762, NTE1761 Datasheet
NTE1761 (Active High) & NTE1762 (Active Low)
Integrated Circuit
Infrared Remote Control Preamp
Features:
D High Frequency Amplifier with a Control Range of 66dB
D Synchronous Demodulator and Reference Amplifier
D AGC Detector
D Pulse Shaper
D Q–Factor Killing of the Input Selectivity, which is Controlled by the AGC Circuit
D Input Voltage Limiter
Absolute Maximum Ratings:
Supply Voltage (Pin8), V
Output Current Pulse Shaper (Pin11), I
Voltages Between Pins (Note 1)
Pin2 and Pin15, V
Pin4 and Pin13, V
Pin5 and Pin6, V
Pin7 and pin10, V
Pin9 and Pin11, V
Operating Ambient Temperature Range, T
Storage Temperature Range, T
Note 1. All pins except Pin11 are short–circuit protected.
CC
11
2–15
4–13
5–6
7–10
9–11
A
stg
13.2V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–25° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Electrical Characteristics:
Parameter Symbol Test Conditions Min Typ Max Unit
Supply (Pin8)
Supply Voltage V
Supoply Current ICC = I
Controlled High Frequency Amplifier (Pin2 and Pin15)
Minimum Input Signal (Peak–to–Peak) V
AGC Control Ragne (Without Q–Killing) 60 66 – dB
Input Signal for Correct Operation (Peak–to–Peak) V
Q–Killing Inactive (Peak–to–Peak) V
Q–Killing Active (Peak–to–Peak) V
(TA = +25°C, VCC = V8 = 5V unless otherwise specified)
CC
8
2–15(P–P)
2–15(P–P)
2–15(P–P)I3
2–15(P–P)I14
f = 36kHz, Note 2 – 15 25 µV
f = 36kHz, Note 3 – – 5 µV
Note 3 0.02 – 200 mV
= I14 < 0.5µA – – 140 µV
= I3 = Max 28 – – mV
4.65 5.0 5.35 V
1.2 2.1 3.0 mA
Note 2. For NTE1761, voltage at Pin9 is HIGH (–I9 = 75µA).
For NTE1762, voltage at Pin9 is LOW (I
= 75µA).
9
Note 3. For NTE1761, voltage at Pin9 remains LOW. For NTE1762, voltage at Pin9 remains HIGH.
DC Electrical Characteristics (Cont’d): (TA = +25°C, VCC = V8 = 5V unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Inputs
Pin2 Voltage V
Pin15 Voltage V
Pin2 Resistance R
Pin2 Capacitance C
Input Limiting, Pin1 V
Outputs
Output Voltage HIGH (Pin9) –V
Output Voltage LOW (Pin9) V
Output Current, Output Voltage HIGH –I
Output Current, Output Voltage LOW I
Output Resistance Between Pin7 and Pin10 R
Pulse Shaper (Pin11)
Trigger Level in Positive Direction V
Trigger Level in Negative Direction V
2
15
2–15
2–15
1–16
9–8
9
9
9
7–10
11
11
2.25 2.45 2.65 V
2.25 2.45 2.65 V
10 15 20 kΩ
– 3 – pF
I1 = 3mA – 0.8 0.9 V
–I9 = 75µA – 0.1 0.5 V
I9 = 75µA – 0.1 0.5 V
V9 = 4.5V 75 120 – µA
V9 = 3.0V 75 130 – µA
V9 = 1.0V 75 140 – µA
V9 = 0.5V 75 120 – µA
3.1 4.7 6.2 kΩ
Voltage Pin9 changes
3.75 3.9 4.05 V
from HIGH to LOW
Voltage Pin9 changes
3.4 3.55 3.7 V
from LOW to HIGH
Hysteresis of Trigger Levels ∆V
11
AGC Detector (Pin12)
AGC Capacitor Charge Current –I
AGC Capacitor Discharge Current I
12
12
Q–Factor Killer (Pin3 and Pin14)
Output Current (Pin3) –I
Output Current (Pin14) –I
3
14
Note 4. Undistorted output pulse with 100% AM input.
Pin Connection Diagram
Input Signal
Input Signal
Q Factor Input
Feedback Cap Input
Feedback Cap Input
Feedback Cap Input
Coil Input
1
2
3
4
5
6
7
V
8
CC
0.25 0.35 0.45 V
3.3 4.7 6.1 µA
67 100 133 µA
V
= 2V 2.5 7.5 15 µA
12–16
V
= 2V 2.5 7.5 15 µA
12–16
16
GND
15
Input Signal
14
Q Factor Input
13
Feedback Cap Input
12
AGC Detector Time Constant
11
Pulse Shaper Capacitor
Coil Input
10
9
Output
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