cxa3090n Sony Electronics, cxa3090n Datasheet - Page 15

• Manufacturer Part Number: cxa3090n
• Description: 6ch. Read/write Amplifier For Thin Film Head Of Hard Disk Drive
• Manufacturer: Sony Electronics

Application Notes
Setting of Write current
TAS=T
Write mode
Read mode
Unselected head differential current in Write
mode
Write current symmetry
Use the following characteristics for reference.
Write current can be set with resistor R
I
W
=K/R
1
WC
–T
20
10
5
2
2
(mA) Refer to Fig. 5.
Differential output capacitance
Differential output resistance
Differential input capacitance
Differential input resistance
Output resistance
Fig.5 Write current vs. R
Item
R
5
WC
(k )
I
WX
+I
WY
WC
WC
10
50%
(k ) at Pin 22.
T
1
15
Symbol
T
R
C
R
I
C
R
AS
US
RD
—15—
50%
O
O
I
I
T
2
Between head input pins
Between head input pins
f=5 MHz
RDX or RDY, f=5 MHz
L
I
L
I
W
W
H
H
=15 mA
=15 mA
=1 µH, R
=0 µH, R
50%
Conditions
H
H
=30
=0
WC
22
R
–0.5
Min. Typ. Max. Unit
260
WC
0.6
350
V
1.2
6
CC
=5V, Ta=25 °C
440
0.2 mAp-p
0.5
10
10
50
CXA3090N
k
pF
pF
ns