NJM2552 Datasheet, PDF (1/21 Pages) New Japan Radio – 100MHz INPUT MIXER AND 450kHz FM/AM IF DEMODULATOR IC

NJM2552
100MHz INPUT MIXER AND 450kHz FM/AM IF DEMODULATOR IC
! GENERAL DESCRIPTION
! PACKAGE OUTLINE
The NJM2552 is a FM IF demodulator IC with 450kHz (standard)
IF input, which operates from 2.2V to 9.0V supply. It includes an oscillator,
mixer, limiting amplifier, FM/AM detectors, and RSSI circuit.
The NJM2552 is suitable for FM /AM receivers for data / voice radio
systems.
NJM2552V
! FEATURES
# Wide Operating Voltage
2.2V to 9.0V
# Low Operating Current
FM: 2.5mA at V⁺ =2.7V, AM SW =LOW
AM and FM: 5mA at V⁺ =2.7V, AM SW =HIGH
# Maximum Mixer Input Frequency 100MHz (reference value)
# IF Frequency
450kHz (standard)
# AM/FM detector circuits selectable
AM SW= HIGH
Simultaneous operation of AM/FM sections
AM SW= LOW
FM section only
# Built-in AGC circuit in AM section
# Wide Range RSSI (Received Signal Strength Indication)
# Bipolar Technology
# Package Outline
SSOP20
! BLOCK DIAGRAM
M IX
AM AGC RF AGC RSSI AM AM AF AMP AMP FM AF
IN
V⁺
IN
OUT OUT
SW
OUT OUT
IN
OUT
20
19
18
17
16
15
14
13
12
11
AM
DET
-A AMP
M IXER
RSSI
OSC
AM P
AGC
+-
AM AMP
+ ^{FM AMP}
FM
-
DET
1
OSC
(B)
2
OSC
(E)
3
MIX
OUT
4
GND
5
AM IF
IN
6
7
8
AM _{FM IF IN} FM
DEC
DEC
9
FM IF
OUT
10
QUAD
IN
Ver.2007-10-24
-1-