NTE NTE1237 Datasheet

Features:

D Small External Part Count
D Tuning Meter Circuit
D Wide AGC Range

NTE1237

Integrated Circuit

AM Radio without Audio Stage

Absolute Maximum Ratings:

Supply Voltage, V
Power Dissipation, P

CC

T

Operating Temperature Range, T
Storage Temperature Range, T

Electrical Characteristics:

Parameter Symbol Test Conditions Min Typ Max Unit

Maximum Sensitivity MS fM = 400Hz, MOD = 30%, Output=50mV 37.5 40.0 42.5 dB
Signal–to–Noise Ratio S/N fM = 400Hz,

Total Harmonic Distortion THD fM = 400Hz

Detector Voltage V
Tuning Meter Circuit TM Input = 74dB/m 50 – 100 %

(TA = +25°C unless otherwise specified)

opr

stg

(VCC = 12V, f = 1MHz unless otherwise specified)

Input = 40dB/m 8 12 – dB

MOD = 30%

O(DET)fM

= 400Hz, MOD = 30%, Input = 74dB/m 140 170 230 mW

Input = 74dB/m 42 45 – dB
MOD = 30%, Input = 74dB/m – 1.0 2.0 %
MOD = 80%, Input = 74dB/m – 1.5 3.0 %
MOD = 30%, Input =120dB/m – 2.5 10 %

500mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

18V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Quiescent Current I

Q

– 13 21 mA

Pin Connection Diagram

Input

VCC RF/OSC

V

RF

CC

1
2

3
4

OSC Tank

Converter Input

IF Input

5
6

7

14 8

14

Tuning Meter

13

AGC Amp Input

12

Detector Input

11

Audio OutputConverter Output

10

VCC IF/Audio
GND

9
8 IF Output

17

.827 (21.0) Max

.300 (7.62)

.197

(5.0)

Max

.100 (2.45) .099 (2.5) Min

.600 (15.24)