NJM2590 Datasheet, PDF (1/2 Pages) New Japan Radio – 455kHz INPUT FM IF DEMODULATOR IC

455kHz INPUT FM IF DEMODULATOR IC
NJM2590
Under Development
! GENERAL DESCRIPTION
The NJM2590 is a low current FM IF demodulator IC with 455kHz (standard)
IF input, which operates from 1.6V supply.
The NJM2590 contains the minimum functions required to FM IF demodulator,
that is, IF amplifier, quadrature detector, active filter, FSK comparator, RSSI, and
RSSI comparator. It offers unmatched design flexibility.
! FEATURES
● Low Operating Voltage
● Low Operating Current
● IF Input Frequency
● RSSI Comparator
● Bipolar Technology
● Package Outline

1.6V to 4.0V
550µA at V⁺=1.8V
455kHz (standard)
SSOP14
! BLOCK DIAGRAM
! PACKAGE OUTLINE
NJM2590V
V⁺
RSSI RSSI RSSI FSK
LPF
V⁺
COMP ADJ OUT OUT ^{CHARGE OUT}
14
13
12
11
10
9
8
RSSI COMP
FSK COMP
RSSI
IF AMP
QUAD DET _LPF
1
2
3
4
5
6
7
IF GND _DEC FSK QUAD AF LPF
IN
REF IN OUT IN
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