NJM2591
100MHz INPUT 450kHz FM IF DEMODULATOR IC FOR VOICE
GENERAL DESCRIPTION
The NJM2591
is a wide - operating voltage, low 鈥?current
FM IF demodulator IC for voice application. It includes an
oscillator, mixer, limiting amplifier, quadrature detector, and
active filter.
The NJM2591
also has a noise detector and noise comparator
with hysteresis range.
PACKAGE OUTLINE
NJM2591V
FEATURES
Wide Operating Voltage
Low Operating Current
Maximum Input Frequency
IF Frequency
Bipolar Technology
Package Outline
1.8V to 9.0V
2.5mA type. at V
+
=2.0V
100MHz ( reference value )
450kHz ( standard )
SSOP16
BLOCK DIAGRAM
MIX
IN
16
NOISE NOISE
REC
DET
14
13
IF
OUT
11
AF
OUT
9
LPF
NOISE
COMP
BUFFER
NOISE DET
IF AMP
OSC
NOISE
AMP
FILTER
AMP
RSSI
QUAD
DET
GND
15
MIXER
RSSI
12
QUAD
10
1
OSC
IN
2
OSC
OUT
3
MIX
OUT
4
V+
5
IF IN
6
DEC
7
FIL
OUT
8
FIL
IN
Ver.2004-08-25
-1-