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Part: BA7660FS
Category:
Multimedia
Description:
Company: ROHM Electronics
Datasheet: Download BA7660FS datasheet File size : 124 kB
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Datasheet text preview:
Multimedia ICs
3-channel 75 driver
BA7660FS
The BA7660FS is a 75 driver with a 6dB amplifier and three internal circuits, and provides 75 drive of composite Y signals and C signals, as well as RGB signals. Each load is capable of driving two circuits, and a sag correction function reduces the capacitance of the output coupling capacitor. The input voltage is within a range of 0V to 1.5V, enabling direct connection of ordinary D / A converter output. An internal power-saving circuit is also included which provides simultaneous muting on all three channels, and output pin shorting protection.
Ap an ·VDpl,icsettiotops boxes and other digital video devices Ds
ea re ·)FCantubescoupled directly to D / A converter output. 1 2) Operates at a low power consumption (115mW typ.). 3) Internal output muting circuit. 4) Internal power-saving circuit. 5) Internal output protection circuit.
6) An internal sag correction function makes it possible to reduce the capacitance of the output coupling capacitor. 7) Each load is capable of driving two circuits. 8) The compact 16-pin SSOP-A package is used.
·Absolute maximum ratings (Ta = 25°C)
Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol Vcc Pd Topr Tstg Limits 8 650 25 ~ + 75 55 ~ + 125 Unit V mW °C °C
·Recommended operating conditions (Ta = 25°C)
Parameter Operating power supply voltage Symbol Vcc Min. 4.5 Typ. 5.0 Max. 5.5 Unit V
1
Multimedia ICs
BA7660FS
·Block diagram
MUTE 1 16 VCC 75 15 OUTA1
INA
2
6dB
GND
3
14 OUTA2
INB
4
6dB
75
13 OUTB1
GND
5
12 OUTB2
N.C.
6
11 N.C.
INC
7
6dB
75
10 OUTC1
MUTE (1pin) H 3ch MUTE NORMAL
GND
8
9 OUTC2
L
2
Multimedia ICs
BA7660FS
·Pin descriptions and input / output circuits
Pin. No Pin name IN OUT Reference voltage Equivalent circuit Function
Muting control 1 MUTE K -- --
15k
8k
If MUTE (pin 1) is set to HIGH, muting is carried out simultaneously on all three channels.
Signal input 2 4 7 INA INB INC Input video RGB, within (typ.). signals consist of composite signals, Y signals, C signals, and others. The input level is a range of 0 to 1.3 (min.) to 1.5
K
--
--
3 5 8
GND
--
--
0V
GND
Ground
14 12 9 15 13 10
OUTA2 OUTB2 OUTC2 -- OUTA1 OUTB1 OUTC1 K
0.9V
14pin 12pin 9pin
Signal output The signal output level is (0.9 + 2 × input voltage [V]). Pins 9, 12, and 14 are the pins for sag correction. If pins 10, 13, and 15 are set to 0.2V or less, the protective circuit is triggered and the power-saving mode is accessed.
0.95V
15pin 13pin 10pin
Vcc
16
VCC
--
--
5.0V
Power supply
3
Multimedia ICs
BA7660FS
·Electrical characteristics (unless otherwise noted, Ta = 25°C, VCC = 5V)
Parameter Circuit current Maximum output level Voltage gain Frequency characteristic Muting attenuation Muting switching level HIGH Muting switching level LOW Symbol ICC Vom GV Gf MT V THH V THL Min. 11.4 2.6 5.5 1.0 -- 3.5 0 Typ. 22.8 3.0 6.0 0.0 60 -- -- Max. 34.2 -- 6.5 1.0 -- V CC 1.0 Unit mA VP- P dB dB dB V V With no signal f = 1kHz,THD = 1% f = 4.43MHz,1VP- P f = 7MHz / 1MHz,1VP- P f = 4.43MHz,1VP- P
-- --
Conditions
·Guaranteed design parameters (unless otherwise noted, Ta = 25°C, VCC = 5V)
Parameter Differential gain Differential phase Interchannel crosstalk Interchannel voltage gain differential Symbol DG DP CT GV Min. -- -- -- 0.5 Typ. 0.5 0.5 60 0.0 Max. 1.5 1.5 55 0.5 Unit % deg dB dB Conditions 1.0VP- P reference staircase signal 1.0VP- P reference staircase signal f = 4.43MHz,1VP- P f = 4.43MHz,1VP- P
·Measurement circuit
3.3V 1 2 1.2V 3 1µF 1 1µF 1µF 1µF 430k 2 75k 1 SW4 430k 2 75k 4 6dB 75 13 22µF 5 12 SW2 2 6dB 75 15 22µF 3 14 100µF 75 V 1 16 SW1 SW16 1 2 0.1µF 100µF 75 V 47µF A VC C
1µF 1 1µF
N.C. SW7 430k 2 75k
6
11
N.C. 100µF
7
6dB
75
10 22µF
75
V
8
9
4
Multimedia ICs
BA7660FS
·Measurement condition settings table
Item Circuit current Maximum output level OUTA OUTB OUTC OUTA Voltage gain OUTB OUTC Frequency characteristics OUTA OUTB OUTC OUTAOUTB OUTAOUTC Crosstalk between channels OUTBOUTA OUTBOUTC OUTCOUTA OUTCOUTB OUTA Muting attenuation OUTB OUTC Symbol SW1 ICC VOM1 VOM2 VOM3 GV1 GV2 GV3 GF1 GF2 GF3 CT1 CT2 CT3 CT4 CT5 CT6 MT1 MT2 MT3 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 1 1 1 SW2 1 2 1 1 2 1 1 2 1 1 2 2 1 1 1 1 2 1 1 Switch conditions SW4 1 1 2 1 1 2 1 1 2 1 1 1 2 2 1 1 1 2 1 SW7 1 1 1 2 1 1 2 1 1 2 1 1 1 1 2 2 1 1 2 SW16 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Note 6 Note 5 Note 4 Note 3 Note 2 Measurement method Note 1
The muting switching level is substituted by carrying out the above measurement at High = 3.3V, Low = 1.2V.
Note 1: Measure the circuit current when no signal is present. Note 2: Apply a sine wave of f = 1kHz to the input, and adjust the input level so that the output distortion is 1%. At this time, set the output voltage to the maximum output level of VOM [VP-P]. Note 3: Measure the output VO [VP-P] with a sine wave of f = 4.43MHz, 1VP-P applied to the input. Voltage gain GV is: GV = 20 Log (VO / VIN) [dB] Note 4: Measure the outputs VO7 and VO1 [VP-P] each with sine waves of f = 7MHz, 1VP-P and f = 1MHz, 1VP-P applied to the input. Voltage frequency GF is: GF = 20 Log (VO7 / VO1) [dB] Note 5: Measure the output VO [VP-P] with a sine wave of f = 4.43MHz, 1VP-P applied to the input. Interchannel crosstalk CT is: CT = 20 Log (VO / VIN) [dB] Note 6: Measure the output VO [VP-P] with a sine wave of f = 4.43MHz, 1VP-P applied to the input. The muting attenuation MT is: MT = 20 Log (VO / VIN) [dB]
5
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