NTE NTE1843 Datasheet

NTE1843

Integrated Circuit

FM Front End

Description:

The NTE1843 is an integrated circuit in a 9–Lead SIP type package designed for use in FM front–end
applications. Typical applications include portable radio and radio cassettes.

Compared with conventional types, supply voltage dependence, overload characteristics and spuri­ous radiation characteristics are improved.

Features:

D Wide Supply Voltage Range: VCC = 1.6V to 6.0V
D Excellent Supply Voltage Dependence of Loacl Oscillator: Oscillator Stop V
D Improved Inter–Modulation Charactristics by Double Balanced Type Mixer Circuit
D Low Spurious Radiation
D Built–In Clamping Diode for the Local Oscillator Output

= 0.9V Typ

CC

Absolute Maximum Ratings:

Supply Voltage, V
Power Dissipation, P

CC

D

(TA = +25°C unless otherwise specified)

Derate Above 25°C 4mW/°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Temperature Range, T
Storage Temperature Range, T

Electrical Characteristics:

(TA = +25°C, VCC = 5V, f = 83MHz, fm = 1kHz, ∆f = 22.5kHz dev. unless

opr

stg

otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Supply Current I
–3dB Limiting Sensitivity V
Quiescent Sensitivity Q
Conversion Gain G
Local OSC Voltage V
Parallel Input Resistance (Pin1 Impedance) r
Parallel Output Resistance (Pin3 Impedance) r
Parallel Output Capacitance (Pin3 Impedance) c

Parallel Input Resistance (Pin4 Impedance) r
Parallel Input Capacitance (Pin4 Impedance) c
Parallel Output Resistance (Pin6 Impedance) r
Parallel Output Capacitance (Pin6 Impedance) c
Local OSC Stop Voltage V

CC

in(lim)

OSCfOSC

ip1

op3

op3

ip4

ip4

op6

op6
stop

VIN = 0 – 5.2 8.0 mA

S
C

f = 83MHz – 25 – kΩ

f = 10.7MHz – 100 0 kΩ

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

–25° to +75°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

– 3.0 7.0 dBµ
– 11 – dBµ
– 31 – dB

= 60MHz 150 230 350 mV

– 57 – Ω

– 2.0 – pF
– 2.7 – kΩ
– 3.3 – pF

– 4.8 – pF
– 0.9 1.3 V

8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

rms

Pin Connection Diagram

(Front View)

9

V
OSC Output

8

OSC Input

7
6

Mixer Output
GND

5
4

Mixer Input

3

Tuning Coil

2

Bypass
RF Input

1

CC

.323

(8.2)

Max

.100 (2.54)

.906 (23.0) Max.126 (3.2)

19

.020 (0.50)

.099

(2.5)

.800 (20.3)

Min