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Part: BA3837F
Category:
Multimedia
Description:
Company: ROHM Electronics
Datasheet: Download BA3837F datasheet File size : 128 kB
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Datasheet text preview:
Multimedia ICs
Vocal fader IC
BA3837 / BA3837F / BA3838F
The BA3837, BA3837F and BA3838F are ICs with an internal secondary active LPF for vocal cancellation functions and mixing amplifier functions with high degrees of vocal cancellation. Three control pins are used to switch between modes: the key controller input mode, through mode, vocal fader mode, sound multiplexing mode and mute mode. By offering these functions on a single chip, these ICs can significantly reduce the number of external components. tions ·aArpplkiceafunctions on stereo systems, portable stereos and VCRs K ao
·)FSeiatgulree-ship IC with vocal fader, to erase vocals from 1 n c
commercially available recordings. 2) Internal secondary active LPF for high degrees of vocal cancellation (high synchronization rejection). 3) Three control pins for switching between 4 modes: through, vocal fader, sound multiplexing and mute.
4) Key controller input and internal switches. 5) Low noise and low distortion. 6) Internal microphone mixing amplifier. 7) Available in two packages: DIP 16-pin and SOP 16pin (BA3838F is available in SOP 16-pin only).
·Absolute maximum ratings (Ta = 25°C)
Parameter Power supply voltage Power dissipation DIP16 SOP16 Symbol VCC Pd Topr Tstg Limits 18 10001 5502 40 ~ + 85 55 ~ + 125 Unit V mV °C °C
Operating temperature Storage temperature
1 Reduced by 10 mW for each increase in Ta of 1°C over 25°C. 2 Reduced by 5.5mW for each increase in Ta of 1°C over 25°C.
·Recommended operating conditions (Ta = 25°C)
Parameter Power supply voltage1 Power supply voltage1 Power supply voltage2 Symbol VCC VCC VCC Min. 5.4 5.4 4.0 Typ. -- -- -- Max. 10 13 15 Unit V V V Conditions Ta = 40°C ~ + 85°C Ta = 40°C ~ + 60°C Ta = 25°C
1 BA3837 and BA3837F 2 BA3838F
1
Multimedia ICs
BA3837 / BA3837F / BA3838F
·Block diagram
C 16 B 15 A 14 ROUT 13 LP 12 + LP 11 LP 10 RIN 9 + LOGIC +
R L+R SW2 + LR + L + +
+
SW1
1 VC C
2 MIC
3 LOUT
4 FK
5 TK
6 LIN
7 BIAS
8 GND
2
Multimedia ICs
BA3837 / BA3837F / BA3838F
·Pin descriptions
Pin No. 1 Pin name VCC
VCC 1 VCC 2 51k
Equivalent circuit
Function
2
2 MIC IN
Mixing input pin for microphone sound
VCC VCC 20k 20k
3
LOUT
3
Lch output pin
VCC
1 VCC 2
51k
4
4 FK Input pin for key controller signals
BA3837 / BA3837F
VCC VCC
5
5
TK
BA3838F
VCC VCC
Output pin for key controller signals
5
400
3
Multimedia ICs
BA3837 / BA3837F / BA3838F
Pin No.
Pin name
Equivalent circuit
Function
VCC
1 VCC 2
51k
6
LIN
6
L signal input pin
VCC
VCC
51k
7
BIAS
7
51k
Signal bias circuit pin
8
GND
VCC
1 VCC 2
51k
9
RIN
9
R signal input pin
11
VCC
10.4k 10.4k
10
LPF1
10
LPF time constant pin
VCC
10.4k 10.4k
11
LPF2
11 10
LPF time constant pin
4
Multimedia ICs
BA3837 / BA3837F / BA3838F
Pin No.
Pin name
Equivalent circuit
Function
VCC
VCC
VCC
20k
12
LPF3
12
LPF output pin
20k
VCC
VCC
13
ROUT
20k
13
R output pin
VCC
14
CONTA
14
Mode switching pin A
VCC
15
CONTB
15
Mode switching pin B
VCC
16
CONTC
16
Mode switching pin C
5
Others parts begin by ba
BA-1 BA-2 BA-3 BA-4 BA-5 BA-6 BA-7 BA-8 BA-9 BA-10 BA-11 BA-12 BA-13 BA-14 BA-15 BA-16 BA-17 BA-18
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