BA1451F-E2 Rohm Semiconductor, BA1451F-E2 Datasheet

IC AUDIO AM/FM TUNER 8V SOP24 TR

BA1451F-E2

Manufacturer Part Number
BA1451F-E2
Description
IC AUDIO AM/FM TUNER 8V SOP24 TR
Manufacturer
Rohm Semiconductor
Datasheet

Specifications of BA1451F-E2

Function
AM Radio FM IF Stereo System
Rf Type
AM, FM
Secondary Attributes
IF Stereo System IC
Package / Case
24-SOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

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Part Number
Manufacturer
Quantity
Price
Part Number:
BA1451F-E2
Manufacturer:
RHOM
Quantity:
20 000
Audio ICs
AM radio / FM IF stereo system IC
BA1451F
The BA1451F is a tuner system IC for electronic tuning for AM radios, FM IF, and MPX. It has been developed for HiFi
component applications.
The MPX VCO circuit requires no adjustment, which will enable a reduction in the number of production line processes.
In particular, the laser lock technique used in the VCO means that no external adjustment is required.
!Applications
Synthesized tuner for HiFi components.
!Features
1) Built-in AM monaural radio, FM IF amplifier/detector, and FM stereo demodulator.
2) DTS (both SD and IF count) compatible.
3) Built-in reference voltage power supply provides good shortwave band frequency stability.
4) Good FM stability.
5) The FM MPX VCO uses laser locking making adjustment and external components unnecessary.
6) Built-in forced monaural operation function for MPX (VCO stops, and LED goes off).
7) Low cutoff of audio is possible to improve AM fidelity.
8) MPX VCO stops in AM mode.
9) Audio muting is possible when an IF request is made.
! ! ! ! Block diagram
24
1
FM
IF
Vreg
Vcc
23
2
DET
OSC
SD
AM
22
3
GND
21
4
DET
FM
MIX
20
AM
5
19
6
DRIVER
LED
AM IF
DET
AM
18
7
AGC
COMP
17
8
16
9
15
10
DECODER
14
11
SW
VCO
13
12
PD
SD
1/2
1/2
BA1451F

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BA1451F-E2 Summary of contents

Page 1

... Audio ICs AM radio / FM IF stereo system IC BA1451F The BA1451F is a tuner system IC for electronic tuning for AM radios, FM IF, and MPX. It has been developed for HiFi component applications. The MPX VCO circuit requires no adjustment, which will enable a reduction in the number of production line processes. ...

Page 2

... Min. Typ. Max. Unit 3.8 5.0 8.0 V Internal circuit reg 330Ω 1 GND GND 5pF GND 4 6/7 GND 4 BA1451F Quiescent voltage ( 2.1 2.1 5.0 5.0 0.25 0 15kΩ 5.0 5.0 − − − − ...

Page 3

... Pilot filter Connect to a capacitor. Internal circuit MUTE IF OUT 10kΩ 8 10kΩ GND GND 10/11 GND reg AM/FM GND reg MONO GND 4 BA1451F Quiescent pin voltage ( 4.2 4.2 1.5 1.5 1.5 1.5 0 2.1 2.1 2.1 ...

Page 4

... Connect ceramic filter. AM mixer output 19 Connect to primary side of AM IFT. AM antenna 20 Connect to AM antenna. Internal circuit reg 14 15 GND 5kΩ GND 20kΩ GND GND reg 20 GND 4 BA1451F Quiescent pin voltage ( 2.1 2.1 2.1 2.1 2.1 2 5.0 5.0 5.0 5.0 2.1 2.1 ...

Page 5

... V Input for pin 6 current ≥ 1mA dBµV 300 400 530 mV IF request ON P-P 140 200 280 mVrms BA1451F Quiescent pin voltage ( 2.1 2.1 4.3kΩ 2.1 2.1 2.1 2.1 24 1.7 1.4 Conditions =100dBµV,mono IN =100dBµV, mono IN =100dBµV, mono IN =60dBµ ...

Page 6

... OSC MIX SD DET LED GND TUN. ST. IFREQ 3.9k 1 24k +B Sumida 2157-JPS-029 Toko A7BRS-12445X Toko CFMA-258 Sumida 0236-JPS-101 A119ACS-19197N Toko Fig. 1 BA1451F 100p MONO 22 10 10k 6800p DET MPX MUTE REQ 0.22 0.022 OFF 0.01 0.01 MUTE 3.3k IF OUT R-ch L-ch 0.047 Units : R [Ω ...

Page 7

... TUNING STEREO TO LED etc. Fig. 2 180 S+D+N 170 160 150 140 130 AMR 120 R→L SEP 110 L→R 100 100 120 ( dBµ) IN BA1451F IFIN AGC DET MPX MPX SD AM OUT MONO MUTE REQ IF OUT Rch Lch AMFM Vcc (5V) Lch OUT Rch OUT ...

Page 8

... V AGC 1 100 120 ( dBµ External dimensions (Units : mm D+N (30%) 5k 10k 20k BA1451F 60 SEP L→R 50 R→ Vcc=5V f =10.7MHz IN V =100dBµ ∆f=±22.5kHzdev R MAIN pilot=±7.5kHzdev L Ta=25˚C 10 THD SUB MONO 0 50 100 200 500 10k 20k FREQUENCY : fm (Hz) Fig.6 Channel separation and THD vs ...

Page 9

Appendix No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product ...

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