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PDF BH7273KV Data sheet ( Hoja de datos )
| Número de pieza | BH7273KV | |
| Descripción | Equalizer and ATF circuit IC for Digital VCRs | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Video ICs
Equalizer and ATF circuit IC for
Digital VCRs
BH7273KV
The BH7273KV is an equalizer and ATF circuit IC developed for use with digital video cassettes (DVC). By using this
IC, it is simple to design the filter for the equalizer required for DVD sets. In addition, the ATF circuit detects the pilot
signals and generates error signals.
•Applications
Equalizers and ATFs for digital VCRs
•Features
1) Enables the configuring of all pass filters, 1 + D cir-
cuits, and transversal filters (TVF).
2) Built-in VCA, amplifier, buffer, and mixer amplifier.
3) Detects the ATF pilot signal and generates an ATF
error signal.
4) Built-in 1.5MHz LPF, VCA, 465kHz BPF, 697.5kHz
BPF, 25dB amplifier, peak detector, and subtractor.
5) Intermediate frequencies are variable by controlling
the voltages for the 465kHz BPF and 697.5kHz
BPF.
•Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Applied voltage
Power dissipation
VCC
Pd
7.0
∗ 1000
Operating temperature
Topr
– 20 ~ + 65
Storage temperature
Tstg
– 55 ~ + 125
∗ When mounted on a 70mm × 70mm × 1.6mm glass epoxy board.
∗ Reduced by 10.0mW for each increase in Ta of 1°C over 25°C.
Unit
V
mW
°C
°C
•Recommended operating conditions (Ta = 25°C)
Parameter
Symbol Min. Typ.
Power supply voltage
VCC 5V
4.6
4.9
᭺Not designed for radiation resistance.
Max.
5.2
Unit Conditions
V 2, 15, 21, 33, 44, 48, 60pin
1
1 page  
Video ICs
•Input / output circuits
Pin No.
Pin name Pin voltage
1 SLEEP CTRL 0.0
Internal circuit
1
15k
100k
35k
15k
BH7273KV
Function
Sleep control
2
VCC 5V
—
3 BIAS FILTER 2.2
4
BF2 IN
3.0
5
BF2 OUT
2.2
— VCC for all pass filter of pins 3 to10
21k
20k
3
22k
4
5k
5
Filter for BF amplifier bias of pins 4
and 5
Buffer amplifier input
Buffer amplifier output
6 APF1 AMP + IN —
7 APF1 AMP – IN —
8 APF1 AMP OUT —
9
DRIVER IN
—
10
DRIVER OUT
—
67
150
8
APF amplifier positive input
APF amplifier negative input
APF amplifier output
9
10
Driver input
Driver output
5
5 Page 
Video ICs
Pin No.
Pin name Pin voltage
59
GND
—
Internal circuit
—
BH7273KV
Function
GND for LPF and VCA
60
VCC 5V
—
— VCC for LPF and VCA
61
GAIN ADJ
1.5
62
GAIN SW
0.0
63
LPF IN
3.8
70k
61
30k
35k
1k 1k
62
15k
100k
35k
15k
VCA gain adjustment
VCA gain switching
63
5k LPF input
64
N.C.
—
N.C. pin
— Connect to ground to lower
impedance
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet BH7273KV.PDF ] | |
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