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參數(shù)資料
| 型號： | BA3126F |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | 2-channel head switch for radio cassette recorders |
| 中文描述： | 2聲道收錄機(jī)頭開關(guān) |
| 文件頁數(shù)： | 5/7頁 |
| 文件大?。?/td> | 110K |
| 代理商： | BA3126F |
822
Audio ICs
BA3126F / BA3126N
Circuit operation
(1)
Playback mode
When the control pin voltage goes below 0.5V, the REC
SW goes off and the P / B SW goes on to put the IC into
playback mode. In this mode, the playback signal from
the head is sent to the P / B amplifier via the REC SW.
(2)
When the control pin voltage goes above 3.9V, the P / B
SW goes off and the REC SW goes on to put the IC into
record mode. In this mode, the recording signal from
REC amplifier is transmitted to the head via the P / B
SW.
REC mode
Operation notes
(1)
When the voltage on the control pin drops below
0.5V, (pin 5 for the BA3126F, and pin 4 for the BA3126N)
the IC switches to P / B mode . When the voltage is 0V,
the maximum source current generated is 120
μ
A (I
LOW
).
When the voltage on the control pin goes above 3.9V the
IC switches to REC mode. When the voltage is 5V, the
maximum sink current generated is 180
μ
A (I
HIGH
). When
the control pin is open, the voltage on it is 3V
F
(approxi-
mately 2.0V). All switches are on at this time.
(2)
: pins 3 and 7)
This switch is on during playback. Due to the characteris-
tics of the transistor switch, the following DC voltage is
generated :
V
OFSP
< 15mV (V
CC
= 9.0V, V
cont
= 0V)
This switch is off during recording. A built-in, high-with-
standing voltage switch means that it can handle the
large-amplitude bias signal generated by the bias gener-
ator.
Due to variations between individual ICs, we recommend
that you keep the voltage below 120V
P-P
(at f = 100kHz).
(3)
REC switch (BA3126F : pins 1 and 14, BA3126N :
pins 1 and 9)
This switch is on during recording. Due to the character-
istics of the transistor switch, the following DC voltage is
generated :
V
OFSP
< 6mV (V
CC
= 9.0V, V
cont
= 5V)
The switch is off during playback, and the playback signal
from the head is transmitted to the playback amplifier.
P / B switch (BA3126F : pins 3 and 12, BA3126N
(4)
range
Operation of the basic functions of the application exam-
ple circuit are guaranteed if operated within the stipulated
power supply voltage and ambient temperature ranges.
We cannot guarantee the ratings for the electrical char-
acteristics, but they will not change radically if the circuit
is operated within the stipulated power supply voltage
and ambient temperature ranges.
(5)
Transient characteristics during power supply
switching
When the power is switched on and of in P / B mode
(control pin low), a transient current may flow from the
P / B SW to the REC SW.
If the head is in contact with the tape, and this current
flows into the head, the frequency component will be re-
corded as a pop sound on the tape. Pay due consider-
ation to the power supply on / off timing and the head
position relationship.
(6)
Playback-to-recording switching timing
If a large-amplitude signal from the bias oscillator is ap-
plied when the P / B SW is on, the P / B switch may latch
if there is excessive current from the bias oscillator. If this
happens, the P / B SW will not switch off when the con-
trol pin is driven high, and the IC will not enter REC mode.
Design the timing so that when the IC is switched from
playback to recording mode, the P / B SW goes off be-
fore the large-amplitude signal from the bias oscillator is
applied to the P / B SW.
Recommended operating power supply voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BA3126F-E2 | 功能描述:IC HEAD SWITCH 2CH 16V SOP14 TR RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻處理 系列:- 其它有關(guān)文件:STA321 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:Sound Terminal™ 類型:音頻處理器 應(yīng)用:數(shù)字音頻 安裝類型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤 供應(yīng)商設(shè)備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱:497-11050-6 |
| BA3126N | 制造商:ROHM 制造商全稱:Rohm 功能描述:2-channel head switch for radio cassette recorders |
| BA3128F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Audio-switched operational amplifier(2 inputs, 1 output) |
| BA3128N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| BA3129 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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