NTE NTE1559 Datasheet

Integrated Circuit

FM IF Amp, Demod

Functions:

D FM IF Amplifier
D Quadrature Detector
D Audio Amplifier
D Muting Circuit
D Signal–Meter Driver

Features:

D High Signal–to–Noise Ratio
D High Sensitivity
D Large Muting Attenuation
D Stable Operation using Full–Balanced

Differential

Absolute Maximum Ratings:

Supply Voltage, V
Power Dissipation, P
Operating Temperature Range, T
Storage Temperature Range, T

CC

T

opr

stg

NTE1559

D AFC
D Center–Meter Driver
D Muting Controller (Bandwidth & Level)
D Center–Meter Short Circuit for AM Band (Pin15)
D IF Amp Killer for AM Band (Pin15)

D Triplex Amplifier
D High Linearity of Signal Meter
D Operational Input Level of Muting is Adjustable

by Controlling External Resistance

15V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

590mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–20° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Characteristics: (TA = +25°C, VCC = 13V, fc = 10.7MHz, fm = 400Hz, f = 75kHz dev.

unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Operating Current ICCmax Vin = 100dBµ, 2V supplied to Pin5,

+150kHz detuned

Limiting Sensitivity V

Recovered AF Voltage V
Total Harmonic Distortion THD Vin = 100dBµ – 0.01 0.08 %
Signal–to–Noise Ratio S/N Vin = 100dBµ 83 88 – dB
AM Rejection AMR Vin = 100dBµ, fm = 1kHz, MOD = 30% 45 60 – dB
Muting Attenuation Mute

in(lim)

o(AF)

Input level lower by 3dB than (V
100dBµ of input voltage)

Vin = 100dBµ 280 380 510 mV

) (Output Voltage under 100dBµ if Vin and with

(ATT

Pin5 Open) = 0dB, 2V fed to Pin5 via 12kΩ

o(AF)

under

– 30.5 39.3 mA

– 33 37 dBµ

83 100 – dB

Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 13V, fc = 10.7MHz, fm = 400Hz,

f = 75kHz dev. unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Muting Bandwidth BW

Muting Sensitivity V

Muting Sensitivity Control Range ∆V
Meter Driven Voltage (1) V
Meter Driven Voltage (2) V
Meter Driven Voltage (3) V
Recovered AF Voltage Attenuation

V

(for AM Band)

Center–Meter Voltage

V

(For AM Band)

Mute Control

Audio Amp Output

AFC Amp Output

Quadrature Tank

(Mute)

The sum of plus and minus side ∆fc’s for
V12 = 1.4V under 100dBµ if V

in(Mute)

Without muting level control, Pin16 Open,
V12 = 1.4V

in(Mute)

13–0

13–70

13–110

O(AM)

Max Input Level for Muting Level Control 75 – – dBµ
Vin = 0dBµ – 0 – V
Vin = 70dBµ 0.9 1.6 – V
Vin = 110dBµ 4.5 5.5 – V
Vin = 100dBµ, Pin15 Open, 13V supplied to

Pin15 via 4.7kΩ

CM(AM)Vin

difference of Pin7 and Pin10 with 13V sup­plied to Pin15

Pin Connection Diagram

1st IF Input

2nd IF Input

3rd IF Input

GND

in

= 100dBµ, +150kHz detuned, the voltage

1
2

3
4
5
6
7
8

16

Level Control

15

Center Meter
GND

14

Signal Motor Drive

13

Mute Switch

12

V

11

CC

Quadrature Tank

10

Quadrature Tank

9

60 100 160 kHz

36 43 60 dBµ

60 81 – dB

–30 +7 +30 mV

.245

(6.22)

Min

16 9

.260 (6.6) Max

18

.785 (19.9)

Max

.300

(7.62)

.200 (5.08)

Max

.100 (2.54)

.700 (17.7)