NJM2591 Datasheet, PDF (1/13 Pages) New Japan Radio – 100MHz INPUT 450kHz FM IF DEMODULATOR IC FOR VOICE

NJM2591
100MHz INPUT 450kHz FM IF DEMODULATOR IC FOR VOICE
GENERAL DESCRIPTION
The NJM2591 is a wide - operating voltage, low – 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
NOISE NOISE
IF
AF
IN GND REC DET RSSI OUT QUAD OUT
16
15
14
13
12
11
10
9
MIXER
BUFFER
OSC
NOISE ^RSSI
COMP
NOISE DET
IF AMP
LPF
QUAD
DET
NOISE
AMP
FILTER
AMP
1
2
3
4
5
6
7
8
OSC OSC MIX
V+ IF IN DEC FIL
FIL
IN OUT OUT
OUT IN
Ver.2004-08-25
-1-