BD3822FS Datasheet PDF - Rohm


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BD3822FS
Rohm

Part Number BD3822FS
Description NTSC-PAL Audio I/O
Page 9 Pages

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TECHNICAL NOTE
Video/Audio Interfaces for TV and DVD Recorders
NTSC-PAL Audio I/O
Interface for Recording/Playing
BD3822FS, BD3824FS
ƔDescription
BD3822FS and BD3824FS are the audio selectors with internal input selector, gain amp, ALC and power save ON/OFF functions.
BD3822FS contains the 1/2 power compression amp for level meter and 2ch volume. BD3824FS contains the line amp.
BD3822FS and BD3824FS unify the board pattern by pin compatible, and can be used individually as a high-end and low-end
model.
ƔFeatures
1) Low distortion (0.0015%) and low noise (3.2μVrms) by using a resistance ladder type circuit for volume. Shock sound in
switching is also reduced (BD3822FS)
2) Low distortion (0.0015%) and low noises (2.3μVrms)(BD3824FS)
3) Contains an ALC circuit, and can also be used as an RF output
4) Best suited to energy-saving design by low current consumption by using the Bi-CMOS process; compact regulator in the
set, being advantageous to heating in terms of quality
5) SSOP-A32 is used for package. The PCB layout can be easy and the area of PCB is reduced by putting sound input
terminals together, and output terminals, too.
6) BD3822FS and BD3824FS can be used with the same PCB board.
7) I2C BUS data format of BD3822FS is upward compatible with BD3824FS, and can be used without changing the software.
8) A system is employed, in which the waveform connected to the input (tuner, Front, Ext) is not distorted even in standby
mode.
ƔApplications
DVD recorder
ƔProduct lineup
Function
BD3822FS
Volume function
Available
1/2 power compression amp
Available
Line amp
-
Circuit current (mA)
7
Output noise (μVrms)
3.2
BD3822FS is an upstream compatible IC with BD3824FS.
BD3824FS
-
-
Available
6.4
2.3
Ver.B Oct.2005



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ƔAbsolute maximum ratings (Ta=25qC)
Parameter
Symbol
Limits
Unit
Applied voltage
VCC 10.0 V
Input voltage
Power Dissipation
Operating temperature
VIN
Pd
Topr
VCC+0.3̻GND-0.3
950 *1
-40̻+85 *2
V
mW
qC
Storage temperature
Tastg
-55̻+150
qC
*1 Reduced by 7.6 mW/qC at 25qC or higher.
Thermal resistance Tja = 131.6 (°C/W), when Rohm standard board is mounted.
Rohm standard board : Size:70͙70͙1.6 (mm3)
Material: FR4 glass-epoxy substrate (copper foil area: not more than 3%).
*2 As long as voltage stays within operating voltage range, certain circuit operation is guaranteed in the operating
temperature range.
Allowable power loss conditions are related to temperature, to which care must be taken.
In addition though the standard value of its electrical characteristics cannot be guaranteed under the conditions
other than those specified, basic functions are maintained.
ƔOperating range (Basic operation at Ta͛25qC)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Power Supply voltage *3
VCC
7.0
-
9.5
V
*3 As long as temperature and operating voltage meet specifications
In addition, though the standard value of its electrical characteristics cannot be guaranteed under the conditions
other than those specified, basic functions are maintained.
2/8



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Ɣ Electric characteristics BD3822FS
(Unless specified: Ta=25ͨ, VCC=9V, f=1kHz, VIN=1Vrms, Rg=600Ԉ, RL=10kԈ,Gain Amp=0dB,Volume=0dB,
Input terminal=Front1,Output Terminal=OUT1)
Parameter
Limits
Symbol
Min. Typ. Max.
Unit
Conditions
Circuit current upon no signal
IQ
- 7 30 mA VIN=0Vrms
Standby current
IOFF
-
540 1000
μA £Power OFF¤ MODE
Voltage gain
GV -1.5 0 1.5 dB GV=20log(VOUT/VIN)
Maximum output voltage
VOM 2.0 2.5
-
Vrms
VOM at THD(VOUT)=1%
BW=400-30KHz
Channel balance
CB
-1.5
0
1.5
dB
CB = GV1-GV2
GV1:ch1Gain GV2:ch2 Gain
Total harmonic distortion
THD
- 0.0015 0.05
%
VIN=2Vrms,Volume=-12dB
Gain Amp=5.6dB,BW=400-30KHz
Output noise voltage *
VNO
-
3.2
16
μVrms
Volume=-12dB,Gain Amp=5.6dB
Rg = 0Ԉ, BW=IHF-A
Residual noise voltage *
VNOR
-
2 10 μVrms Volume = -͡dB,Rg = 0Ԉ, BW=IHF-A
Cross-talk between channels * CTC
- -110 -80 dB Rg = 0Ԉ̜BW = IHF-A
Input impedance
RIN 77 110 143 kԈ *1)
Maximum input voltage
VIM 2.1 2.5
-
Vrms
VIM at THD(VOUT)=1%
BW=400-30KHz *1)
Cross-talk between selector
CTS
-
-110 -80
dB
Rg = 0Ԉ̜BW = IHF-A
CTS=20log(VOUT/VIN)
Tuner gain
GTU
10
12
14
dB
Tuner gain=12dB, VIN=0.25Vrms
G=20log(VOUT/VIN)
Output offset voltage
VDC -20 0 20 mV Tuner SAPΦFront1
Volume control range
VV1 -81 -78 -75 dB GV=20log(VOUT/VIN),BW = IHF-A
Maximum attenuation
GV MIN1
-
-106 -85
dB
Volume = -͡dB, BW = IHF-A
GV=20log(VOUT/VIN)
Step resolution 1
GV STEP1
-
1
-
dB Volume=0̻-46dB
Step resolution 2
GV STEP2
-
2
-
dB Volume=-46̻-78dB
Attenuation set error 1
GV ERR1
-2
0
2
dB Volume=0̻-58dB
Attenuation set error 2
GV ERR2
-3
0
3
dB Volume=-60̻-78dB
Minimum gain
GMIN
-1.5
0
1.5
dB Gain Amp=0dB,G=20log(VOUT/VIN)
Maximum gain
G MAX
4.5
6
7.5
dB
Gain Amp=6dB,VIN=500mVrms
G=20log(VOUT/VIN)
Step resolution
G STEP
-
0.2
-
dB 4.6dB to 5.6dB
Gain set error
G ERR -1.5 0 1.5 dB
Mute ON
Mute attenuation
GMUTE
-
-110 -85
dB
GMUTE=20log(VOUT/VIN)
BW = IHF-A
Volume=-͡dB, or -78dB
ALC I/O level 1
ALC1
-
-3
0 dBV Suppression level is set to -3dBV.
ALC I/O level 2
ALC2
-
-5 -2 dBV Suppression level is set to -5dBV.
ALC I/O level 3
ALC3
-
-7 -4 dBV Suppression level is set to -7dBV.
Output offset voltage
VDC OFF
-
30 100 mV VIN =0dBV
DC maximum output voltage
VDC MAX 2.9
3.7
-
V VIN =+6dBV
DC standard output voltage
VDC ST
1.1
1.5
1.9
V VIN =-10dBV
DC voltage difference between
channels
ͼVDC
-250
0
250
mV VIN =-10dBV
DC output voltage linearity
ͼVDC/
ͼVIN
0.9
1.4
1.9
V VIN =-30̻-6dBV
*1: 1) Refers to 1,2,3,9,10,11,12,13,14,25,26,31,32 pin terminals.
3/8



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Ɣ Electric characteristics BD3824FS
(Unless specified: Ta=25ͨ, VCC=9V, f=1kHz, VIN=1Vrms, Rg=600Ԉ, RL=10kԈ,Gain Amp=0dB,Volume=0dB,
Input terminal=Front1,Output Terminal=OUT1)
Parameter
Limits
Symbol
Min. Typ. Max.
Unit
Conditions
Circuit current upon no signal
Standby current
Voltage gain
Maximum output voltage 1
Maximum output voltage 2
Maximum output voltage 3
Channel balance
IQ
IOFF
GV
VOM1
VOM2
VOM3
CB
- 6.4 19.2 mA VIN=0Vrms
- 940 1760 μA ͐Power OFF͑ MODE
-7.6 -6.1 -4.6
dB GV=20log(VOUT/VIN), RL2=10kԈ
Output terminal =
OUT1/OUT2, RL2=10kԈ
1.68 2.1 - Vrms VOM at THD(VOUT)=1%
Gain Amp=5dB,
BW=400-30kHz
Output terminal=RF OUT
2.0 2.5 - Vrms VOM at THD(VOUT)=1%
ALC=OFF, RL2=10kԈ
BW=400-30kHz
Output terminal=
LINE OUT1/LINE OUT2
2.2 2.5 - Vrms VOM at THD(VOUT)=1%
RL1=4.7kԈ
External LPF Gvc=6dB
BW=400-30kHz
-1.5 0 1.5 dB CB = GV1-GV2
GV1:ch1Gain GV2:ch2 Gain
Total harmonic distortion
Output noise voltage *
Cross-talk between channels *
Input impedance
THD
VNO
CTC
RIN
- 0.0015 0.05
% VIN=2Vrms,BW=400-30KHz
- 2.3 11.5 μVrms Rg = 0Ԉ, BW=IHF-A
- -100 -80 dB Rg = 0Ԉ,BW = IHF-A
77 110 143 kԈ *2)
Maximum input voltage
VIM at THD(VOUT)=1%
VIM 2.1 2.5 - Vrms
BW=400-30KHz*2)
Cross-talk between selector *
CTS
- -105 -80 dB Rg = 0Ԉ,BW = IHF-A
CTS=20log(VOUT/VIN)
Tuner gain
Output offset voltage
Minimum gain
Maximum gain
Tuner gain=12dB
GTU 10 12 14 dB VIN=0.25Vrms,
G=20log(VOUT/VIN)
VDC -20
0
20
mV
Tuner1ΦFront1,
Tuner Gain = 8dB
GMIN
-1.5
0
1.5
dB
Gain Amp=0dB
G=20log(VOUT/VIN)
GMAX
3.5
5
6.5
dB Gain Amp=5dB,VIN=500mVrms
G=20log(VOUT/VIN)
Mute attenuation
GMUTE
-
-110 -85
dB
Mute ON, BW = IHF-A
GMUTE=20log(VOUT/VIN)
ALC I/O level 1
ALC1
-
-3
0 dBV Suppression level is set to -3dBV.
ALC I/O level 2
ALC2
-
-5 -2 dBV Suppression level is set to -5dBV.
ALC I/O level 3
ALC3
-
-7 -4 dBV Suppression level is set to -7dBV.
1. *2) Refers to 2,3,9,10,11,12,13,14,31,32pin terminals.
2. VP-9690A (Average value detection, effective value display) IHF-A filter by Matsushita Communication is used fo measurement.
3. Phase between input/output is the same.
4. This IC is not designed to be radiation-resistant.
4/8




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