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BA7181FS

器件型号:BA7181FS
器件类别:模拟混合信号IC    消费电路   
厂商名称:ROHM(罗姆半导体)
厂商官网:https://www.rohm.com/
标准:
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器件描述

2-channel PRE / REC amplifier with auto-tracking interface

参数
参数名称属性值
是否无铅不含铅
是否Rohs认证符合
厂商名称ROHM(罗姆半导体)
零件包装代码SSOP
包装说明SSOP-20
针数20
Reach Compliance Codecompli
ECCN代码EAR99
商用集成电路类型VIDEO PREAMPLIFIER
增益60 dB
JESD-30 代码R-PDSO-G20
JESD-609代码e3/e2
长度8.7 mm
信道数量2
功能数量1
端子数量20
最高工作温度65 °C
最低工作温度-20 °C
封装主体材料PLASTIC/EPOXY
封装代码SSOP
封装等效代码SOP20,.3
封装形状RECTANGULAR
封装形式SMALL OUTLINE, SHRINK PITCH
峰值回流温度(摄氏度)260
电源5 V
认证状态Not Qualified
座面最大高度1.9 mm
最大压摆率110 mA
最大供电电压 (Vsup)5.5 V
最小供电电压 (Vsup)4.5 V
表面贴装YES
技术BIPOLAR
温度等级COMMERCIAL
端子面层TIN/TIN COPPER
端子形式GULL WING
端子节距0.8 mm
端子位置DUAL
处于峰值回流温度下的最长时间10
宽度5.4 mm

文档预览

Video ICs
2-channel PRE / REC amplifier with
auto-tracking interface
BA7181FS
The BA7181FS is a PRE / REC amplifier developed for use in video cassette recorders. It has been designed for use
in two-head decks and features built-in FB damping, two preamplifiers, a chroma output amplifier, an FM output
amplifier (with AGC), an envelope detector, a constant-current BTL-drive REC amplifier (with AGC)and built-in chan-
nel and REC / PB switches on a single monolithic IC.
Applications
VCRs
Features amplifier has a total gain of 57dB
1) The playback
(Typ.), and has a low-noise preamplifier. Designed
for VHS-band operation with low external parts
count. The IC has two circuits for two-head VCR
applications.
2) Two playback output systems (through output and
AGC output). The AGC output level is 300mV
P-P
(Typ.);
suitable for FM brightness signal output.
3) Auto-tracking interface is provided for automated
tracking adjustment. The detector characteristic is
linear, and the sensitivity can be adjusted using
external components.
4) The recording amplifier uses constant-current BLT
drive that handles load variations (i.e. head imped-
ance)well, and gives stable recording characteris-
tics. A single circuit is provided for two-head VCR
use.
5) Built-in recording level AGC means adjustment of
FM recording current is not necessary.
6) Head switches for two-channel PRE / REC system
provided.
7) Operates off a single 5V power supply, with low
power dissipation.
Absolute maximum ratings (Ta = 25°C)
Parameter
Applied voltage
Power dissipation
Operating temperature
Storage temperature
Symbol
V
CC
Pd
Topr
Tstg
Limits
7.0
937.5
– 20 ~ + 65
– 55 ~ + 150
Unit
V
mW
°C
°C
When mounted on a 90mm
×
50mm, t = 1.6mm glass epoxy board.
Reduced by 7.5mW for each increase in Ta of 1°C over 25°C.
Recommended operating (Ta = 25°C)
Parameter
Playback / recording (voltage range)
Not designed for radiation resistance.
Symbol
V
CC
Min.
4.5
Typ.
5.0
Max.
5.5
Unit
V
Conditions
11pin
1
Video ICs
BA7181FS
Block diagram
20
DFF IN
GND 2
1
2
AGC
HPF
3
PRE
4
5
PRE
6
7
LOGIC
ENVE
PEAK
+
8
9
10
CC
=
19
DET FILTER
REC LEVEL ADJ
18
REC DCFB
PB AGC OUT
DET
PRE IN 1
(REC - OUT 1)
GND 1
PRE IN 2
(REC - OUT 2)
REC + OUT
17
PB AGC FILTER
RF
16
15
AT ENVE PEAKING
H SYNC IN
14
13
PB RF OUT
AT ENVE OUT
PB / EE / REC CTRL
MUTE
DET
REC
AGC
12
REC AGC FILTER
REC IN
V
CC
11
AT ENVE FB
V
CC
Electrical characteristics (unless otherwise noted, Ta = 25°C, V
Parameter
Symbol Min. Typ. Max. Unit
〈Playback
system〉 (Fig. 1 measurement circuit, pin 8: “H” )
Quiescent current
Voltage gain CH-1
Voltage gain CH-2
Iq
(P)
G
VP1
G
VP2
54
54
–7
18
57
57
0
– 3
45
60
60
1
0
mA No signal
dB
dB
dB
dB
5.0V and f = 4.0MHz)
Conditions
Measurement
circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Pin 4 input = 0.3mV
P-P
, pin 1: L,
pin 14 output measurement
Pin 6 input = 0.3mV
P-P
, pin 1: H,
pin 14 output measurement
∆G
VP
= | G
VP1
—G
VP2
|
Difference in pin 14 output level for f = 8.0 / 1.0MHz,
V
IN
= 0.3mV
P-P
Voltage gain differential
∆G
VP
Frequency characteristic
∆G
Vf
2nd harmonic distortion
2HD
P
3rd harmonic distortion
3HD
P
Maximum output level
Crosstalk
V
OMP
CT
P
— – 45
— – 45
1.0
1.5
dBc V
IN
= 0.3mV
P-P
, 8.0MHz spurious
dBc V
IN
= 0.3mV
P-P
, 12.0MHz spurious
V
P-P
When pin 14 output 2nd harmonic distortion is –30dBc
dBc Difference in pin 14 output level for pin 1: H / L
— – 38 – 32
Design reference values.
2
Video ICs
Parameter
Symbol Min.
Typ. Max. Unit
Conditions
BA7181FS
Measurement
circuit
〈Playback
system〉 (Fig. 1 measurement circuit, pin 8: “H” )
Output DC offset
Input conversion noise
AGC output level
AGC control sensitivity
AGC amp frequency
characteristic
∆V
ODC
V
NIN
V
AGC
∆V
AGC
∆G
VAF
250
3.5
0
2.4
4.0
3.8
2.2
0
0
0.25
300
0.3
0.5
4
0.7
2.9
4.5
150 mV
P-P
µV
rms
350 mV
P-P
2.0
V
CC
1.2
1.0
3.4
V
CC
2.8
1.2
dB
dB
V
V
V
V
V
V
V
V
Pin 14 output DC offset for pin 1: H / L
Rg = 10Ω, input conversion of pin 14 output noise
V
IN
= 0.3mV
P-P
, pin 18 output measurement
Pin 18 output difference for V
IN
= 0.15
~ 0.6mV
P-P
Pin 18 output level difference for
f = 8.0 / 1.0MHz, V
IN
= 0.3mV
P-P
Pin 7 impedance
Pin 1 DC voltage for channel 2 operation
Pin 1 DC voltage for channel 1 operation
Pin 13 output measurement with no signal
Pin 13 output measurement when pin 14
output = 400mV
P-P
Pin 13 output measurement for large signal
Pin 8 DC voltage for PB mode
Pin 8 DC voltage for REC MUTE mode
Pin 8 DC voltage for REC mode
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
PB switch ON resistance
R
ON7
PRE CH 2 threshold voltage V
TH1H
PRE CH 1 threshold voltage V
TH1L
ENVE residual voltage
ENVE output level
ENVE saturation voltage
PB mode holding voltage
EE mode holding voltage
REC mode holding voltage
V
ENV1
V
ENV2
V
ENV3
V
TH10H
V
TH10M
V
TH10L
Design reference values.
Note: dBc: dB below carrier (used to express relative level from carrier reference for convenience sake).
(unless otherwise noted, Ta = 25°C, V
CC
= 5.0V, f = 4.0MHz and I
OAR
= 30mA
P-P
)
Parameter
Symbol Min.
Typ. Max.
Unit
Conditions
Measurement
circuit
〈Recording
system〉 (Pin 8 in Fig. 2 measurement circuit “L” )
Supply current
Recording AGC level
AGC control sensitivity
REC Amp frequency
characteristic
2nd harmonic distortion
3rd harmonic distortion
Cross modulation distortion
Maximum output level
Recording current load
characteristic
Mute attenuation ratio
AGC mode holding voltage
AGC mode holding voltage
Iq
(R)
I
OAR
∆I
OAR
∆I
OAF
2HD
R
3HD
R
CMD
R
I
OMR
∆I
ORL
MU
R
V
TH15H
V
TH15L
27
40
2.7
0
72
30
0.3
– 1.5
– 45
– 50
– 50
50
– 0.35
– 45
110
33
1.5
– 38
V
CC
1.2
mA
P-P
mA
dB
dB
dBc
dBc
dBc
mA
P-P
dB
dBc
V
V
No signal
Pin 12 input = 125mV
P-P
, pin 7 output measurement
Pin 7 output level difference for pin 12
input = 62.5mV
P-P
and 250mV
P-P
Pin 7 output level difference for f = 8.0 / 1.0MHz,
pin 12 input = 125mV
P-P
Pin 12 input = 125mV
P-P
, 8MHz spurious
Pin 12 input = 125mV
P-P
, 12.0MHz spurious
4.0MHz
±
630kHz spurious
When pin 7 output 2nd harmonic distortion is – 30dB
Pin 7 output level difference for load L: 8.2 ~ 12µH
Pin 7 output level difference for pin 8: M / H
Pin 15 DC voltage to maintain recording AGC operation
Pin 15 DC voltage to maintain recording AGC stopped
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Design reference values.
3
Video ICs
BA7181FS
Measurement circuits
(Playback system)
REC LEVEL ADJ
AT ENVE OUT
PB AGC OUT
PB RF OUT
H SYNC IN
REC IN
V
CC
5V
0.1µ
68p
+
20
19
18
17
3.9k
16
15
390k
14
13
0.01µ
12
43k
22
µ
11
DET
AGC
HPF
ENVE
MUTE
REC
V
CC
PEAK
RF
AGC
PRE
PRE
+
DET
33k
9
10
0.1µ
10k
39k
AT ENVE GAIN
EP “H”
Units: R
C
L
[Ω]
[F]
[H]
LOGIC
1
470pF
2
3
0.1µ
4
5
6
0.1µ
7
8
0.1µ
1k
10
10
PRE IN 1
PRE IN 2
1k
PB / EE / REC CTRL
L: REC MUTE
DFF IN
Fig.1
4
L: REC START
Video ICs
(Recording system)
1
20
DFF IN
43k
REC LEVEL ADJ
470pF
19
2
0.1µ
18
AGC
HPF
3
0.1µ
3.9k
22
µ
PB AGC OUT
17
DET
PRE
4
8.2µ
16
5
68p
15
PRE
6
H SYNC IN
390k
14
RF
PB RF OUT
0.1µ
8.2µ
Fig.2
7
PEAK
13
+
8
ENVE
LOGIC
AT ENVE OUT
0.01µ
12
REC IN
REC
AGC
REC OUT
10
0.1µ
L: REC MUTE
L: REC START
PP / EE / REC CTRL
MUTE
DET
9
0.1µ
39k
11
V
CC
10
10k
+
Units: R [Ω]
C [F]
L [H]
33k
V
CC
5V
AT ENVE GAIN
EP “H”
BA7181FS
5
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