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NJM2597

JRC
Part Number NJM2597
Manufacturer JRC
Description 455kHz INPUT FM IF DEMODULATOR
Published Jun 14, 2009
Detailed Description NJM2590/97 www.DataSheet4U.com 455kHz INPUT FM IF DEMODULATOR GENERAL DESCRIPTION The NJM2590 and NJM2597 are low curre...
Datasheet PDF File NJM2597 PDF File

NJM2597
NJM2597

Overview
NJM2590/97 www.
DataSheet4U.
com 455kHz INPUT FM IF DEMODULATOR GENERAL DESCRIPTION The NJM2590 and NJM2597 are low current FM IF demodulator ICs with 455kHz IF input, which operate from 1.
6V supply.
The NJM2590/97 contain the minimum functions required to FM IF demodulator, that is, IF amplifier, quadrature detector, LPF amplifier, FSK comparator, RSSI, and RSSI comparator.
It offers unmatched design flexibility.
NJM2590V/97V PACKAGE OUTLINE FEATURES Low Operating Voltage 1.
6V to 5.
5V Low Operating Current 550uA at V+ =1.
8V IF Input Frequency 455kHz (standard) RSSI Comparator The Range of Linear Area on RSSI Output versus IF Input Characteristics NJN2590 IF Input level=25 to 60 dBuVEMF (reference value) NJM2597 IF Input level=35 to 85 dBuVEMF (reference value) Bipolar Technology Package Outline SSOP14 BLOCK DIAGRAM V + CARRIER SENSE RSSI SENSE LEVEL OUT 13 12 11 FSK CHARGE OUT 10 9 LPF OUT 8 14 RSSI COMP RSSI IF AMP FSK COMP CHARGE QUAD DET LPF 1 IF IN 2 GND 3 DEC 4 FSK REF 5 QUAD IN 6 AF OUT 7 LPF IN Ver.
2004-08-25 -1- NJM2590/97 www.
DataSheet4U.
com ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Power Dissipation Operating Temperature Storage Temperature SYMBOL V+ PD Topr Tstg RATINGS 8.
0 300 - 40 to +85 - 40 to +125 (Ta=25°C) UNIT V mW °C °C RECOMMENDED OPERATIONAL CONDITION PARAMETER Supply Voltage SYMBOL V+ TEST CONDITIONS MIN.
1.
6 TYP.
1.
8 MAX.
5.
5 (Ta=25°C) UNIT V ELECTRICAL CHARACTERISTICS (Ta=25°C, V+=1.
8V, fin=455kHz, fmod=600Hz, fdev=±4kHz) PARAMETER Current Consumption IF Amplifier Input Resistance Signal to Noise Ratio 1 Signal to Noise Ratio 2 - 3dB Limiting Sensitivity Demodulated Output Level AM Rejection Raito Duty Ratio of Wave Shaped Output Quick Charge/Discharge Current NJM2590 RSSI Output Voltage NJM2597 High Level Leak Current of IfskH FSK OUT Terminal Low Level Voltage of VfskL FSK OUT Terminal High Level Leak Current of IcryH CARRIER SENSE Terminal Low Level Voltage of Vcr yL CARRIER SENSE Terminal Bias Current of ...


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