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參數(shù)資料
| 型號： | MB4138 |
| 廠商： | Fujitsu Limited |
| 英文描述： | Read/Write Amplifier(讀/寫放大器) |
| 中文描述： | 讀/寫放大器（讀/寫放大器） |
| 文件頁數(shù)： | 7/18頁 |
| 文件大?。?/td> | 138K |
| 代理商： | MB4138 |
MB4138
7
I
ELECTRICAL CHARACTERISTICS
1. DC Characteristics
Parameter
Remarks
(Unless otherwise specified, V
CC
= 5.0V
±
10%, Ta = +25
°
C, MR head resistance RMR = 36
,
thin film head Lh = 240 nH, Rh = 15
, C1 = 0.1
μ
F, C2 = 0.1
μ
F, C3 = 0.033
μ
F, C4 = 0.033
μ
F)
Values
Symbol
Unit
mA
mA
mA
Condition
Mode
I
CCI
I
CCR
I
CCW1
RRC = 4.3 k
RRC = 4.3 k
RS = H, RWC = 32
RS = L, RWC = 32
RRC = 4.3 k
I
CCW2
Supply current
Min.
Typ.
Max.
I
R
W1
—
—
—
5.5
34
58
7.5
55
80
W2
—
67
90
mA
mW
mW
mW
mW
V
V
mV
I
R
W1
W2
R/W
R/W
R/W
—
—
—
—
3.45
3.45
—
27.5
220
260
355
3.90
4.10
200
37.5
325
420
470
4.30
4.46
—
Hysteresis width
P
DI
P
DR
P
DW1
Power consumption
P
DW2
Operating voltages
for supply voltage
monitoring
VTHL
VTHH
VTH
RRC = 4.3 k
RRC = 4.3 k
RWC = 32
RWC = 32, RRC = 4.3 k
V
CC
falling
V
CC
rising
VTHH – VTHL
High level
VWDX, YH
—
V
CC
– 1.02
—
V
CC
– 0.5
V
VWDX,
YH – 0.25
Low level
VWDX, YL
—
V
CC
– 1.9
—
V
WDX, WDY input
voltage range
VWDX, YH – VWDX, YL
WDX, WDY input
voltage difference
VWDX, Y
—
250
—
—
mV
HS0 to 2, CS, R/W,
RS input voltage
range
High level
V
IH
—
2.0
—
V
CC
V
Low level
V
IL
—
– 0.3
—
0.8
V
VWDX, Y = V
CC
/–0.3V
I/R
– 50
0
50
μ
A
WDX, WDY input
current
IWDX
IWDY
VWDX, Y = V
CC
W
—
2
50
μ
A
μ
A
HS input current
VHS0 to 2 = V
CC
—
– 50
0
50
VHS0 to 2 = –0.3V
—
– 250
– 120
—
μ
A
I
HS
CS, R/W, RS input
current
VCS, R/W, RS = V
CC
—
– 50
0
50
μ
A
VCS, R/W, RS = –0.3V
—
– 130
– 60
—
μ
A
ICS
IR/W
IRS
Read head input
current
IHR
I/W
– 50
0
50
μ
A
—
Read head current
for non-selected
heads
IHRF
R
– 50
0
50
μ
A
—
MR head current
constant
RC pin voltage
RDX, RDY output
current
(Continued)
KR
R
34.3
36.5
38.7
V
RRC = 4.3 k
VRC
I/R/W
0.88
1.00
1.12
V
—
IRDX, Y
R/W
2.0
4.2
6.0
mA
—
KR =
IR
×
RRC
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