NTE NTE1761

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), VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.2V
Output Current Pulse Shaper (Pin11), I11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA
Voltages Between Pins (Note 1)
Pin2 and Pin15, V2–15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V
Pin4 and Pin13, V4–13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V
Pin5 and Pin6, V5–6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V
Pin7 and pin10, V7–10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V
Pin9 and Pin11, V9–11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25° to +125°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Note 1. All pins except Pin11 are short–circuit protected.
DC Electrical Characteristics: (TA = +25°C, VCC = V8 = 5V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply (Pin8)
Supply Voltage
VCC
4.65
5.0
5.35
V
Supoply Current
ICC = I8
1.2
2.1
3.0
mA
V2–15(P–P) f = 36kHz, Note 2
–
15
25
µV
f = 36kHz, Note 3
–
–
5
µV
60
66
–
dB
0.02
–
200
mV
Controlled High Frequency Amplifier (Pin2 and Pin15)
Minimum Input Signal (Peak–to–Peak)
AGC Control Ragne (Without Q–Killing)
Input Signal for Correct Operation (Peak–to–Peak)
V2–15(P–P) Note 3
Q–Killing Inactive (Peak–to–Peak)
V2–15(P–P) I3 = I14 < 0.5µA
–
–
140
µV
Q–Killing Active (Peak–to–Peak)
V2–15(P–P) I14 = I3 = Max
28
–
–
mV
Note 2. For NTE1761, voltage at Pin9 is HIGH (–I9 = 75µA).
For NTE1762, voltage at Pin9 is LOW (I9 = 75µA).
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
V2
2.25
2.45
2.65
V
Pin15 Voltage
V15
2.25
2.45
2.65
V
Pin2 Resistance
R2–15
10
15
20
kΩ
Pin2 Capacitance
C2–15
–
3
–
pF
Input Limiting, Pin1
V1–16
I1 = 3mA
–
0.8
0.9
V
Output Voltage HIGH (Pin9)
–V9–8
–I9 = 75µA
–
0.1
0.5
V
Output Voltage LOW (Pin9)
V9
I9 = 75µA
–
0.1
0.5
V
Output Current, Output Voltage HIGH
–I9
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
Outputs
Output Current, Output Voltage LOW
I9
Output Resistance Between Pin7 and Pin10
R7–10
Pulse Shaper (Pin11)
Trigger Level in Positive Direction
V11
Voltage Pin9 changes
from HIGH to LOW
3.75
3.9
4.05
V
Trigger Level in Negative Direction
V11
Voltage Pin9 changes
from LOW to HIGH
3.4
3.55
3.7
V
Hysteresis of Trigger Levels
∆V11
0.25
0.35
0.45
V
AGC Capacitor Charge Current
–I12
3.3
4.7
6.1
µA
AGC Capacitor Discharge Current
I12
67
100
133
µA
AGC Detector (Pin12)
Q–Factor Killer (Pin3 and Pin14)
Output Current (Pin3)
–I3
V12–16 = 2V
2.5
7.5
15
µA
Output Current (Pin14)
–I14
V12–16 = 2V
2.5
7.5
15
µA
Note 4. Undistorted output pulse with 100% AM input.
Pin Connection Diagram
Input Signal 1
Input Signal 2
Q Factor Input 3
16 GND
15 Input Signal
14 Q Factor Input
Feedback Cap Input 4
13 Feedback Cap Input
Feedback Cap Input 5
12 AGC Detector Time Constant
Feedback Cap Input 6
11 Pulse Shaper Capacitor
Coil Input 7
VCC 8
10 Coil Input
9 Output
16
9
.260
(6.6)
Max
1
8
.300 (7.62)
.785 (19.9) Max
.200
5.08)
Max
.245
(6.22)
Min
.100 (2.54)
.700 (17.7)