Sony CXA3239TN, CXA3238TN Datasheet
—1—
E98346C8Y
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
Absolute Maximum Ratings (Ta=25 °C)
• Supply voltage VCC –0.3 to +6 V
• Supply voltage VEE –4.5 to +0.3 V
• Digital input voltage Vdi –0.3 to VCC+0.3 V
• Operating temperature Topr –20 to +70 °C
• Storage temperature Tstg –55 to +150 °C
• Allowable power dissipation
TSSOP38 PD 1000 mW
Operating Conditions
• Supply voltage VCC +4.4 to +5.5 V
VEE –4.0 to –2.6 V
• MR bias voltage VMR –300 to +300 mV
• Bias current IB 3 to 8 mA
• Write current IW 15 to 45 mA
Description
The CXA3238TN/CXA3239TN is a Read/Write
amplifier for GMR-Ind (Giant Magneto ResistiveInductive) heads used in hard disk drives, and is
capable of supporting up to six channels.
Features
• +5 V and –3 V power supply.
• Current bias voltage sense type.
• Drives up to six heads (CXA3238TN)
• Drives up to four heads (CXA3239TN)
• Low power 180 mW at Read
• Differential read amplifier gain ; ×140/190
(RMR=50 Ω)
• Input noise of 0.77 nV/ √ Hz (typ.),
RMR=50 Ω, IB=6.0 mA.
• Recovery time write to read ; 300 nsec. (typ.)
• Write data is triggered by differential P-ECL signal.
• Servo bank write. (All channels)
• Write unsafe detection circuit.
• Serial port
…
Head selection
MR bias
Write current
Applications
Hard disk drives with GMR-Ind heads.
Structure
Bipolar silicon monolithic IC
6/4-channel Read/Write Amplifier for GMR-Ind Head Hard Disk Drive
38 pin TSSOP (Plastic)
CXA3238TN/CXA3239TN
For the availability of this product, please contact the sales office.
—2—
CXA3238TN/CXA3239TN
AMP
DRIVER
DRIVER
DRIVER
DRIVER
AMP
AMP
DRIVER
AMP
DRIVER
AMP
AMP
Bias
current
source
Write
current
source
WD BUF
Serial Interface
AMP
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
RS
SCLK
SDATA
WDX
WDY
V
CC
GND
RDY
RDX
FLT/SE/BHV
R/XW
SDEN
CAP
V
EE
W0X
W0Y
R0X
R0Y
W1X
R5Y
R5X
W5Y
W5X
W4X
W4Y
R4X
R4Y
R3Y
R3X
W3Y
W3X
W2X
W2Y
R2X
R2Y
R1Y
R1X
W1Y
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Block Diagram and Pin Configuration
CXA3238TN
—3—
CXA3238TN/CXA3239TN
CXA3239TN
AMP
DRIVER
DRIVER
AMP
Bias
current
source
Write
current
source
WD BUF
Serial Interface
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
AMP
RS
SCLK
SDATA
WDX
WDY
VCC
GND
RDY
RDX
FLT/SE/BHV
NC
NC
NC
NC
NC
R/XW
SDEN
CAP
VEE
R3Y
R3X
W3Y
W3X
W2X
W2Y
R2X
R2Y
W1X
W1Y
R1X
R1Y
R0Y
R0X
W0Y
W0X
NC
NC
VEE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
AMP
DRIVER
AMP
DRIVER
—4—
CXA3238TN/CXA3239TN
Pin Description CXA3238TN
Pin
Symbol Equivalent circuit Description
No.
1
2
3
12
4
5
6
7
9
8
RS
SCLK
SDATA
SDEN
WDX
WDY
VCC
GND
RDX
RDY
VCC
VEE
GND
250
VBGR
≈1.3V
1
VCC
VEE
GND
2
3
12
14k
7.5k
2Vf
VCC
VEE
GND
100
100
4
5
VCC
VEE
GND
8
9
100
1.8mA
Bias current setting resister is connected
between this pin and GND.
Serial control signal input.
Differential P-ECL write data input.
5 V power supply.
Ground
Read amplifier output with coupling
capacitors.
High impedance in the write mode.
—5—
CXA3238TN/CXA3239TN
Pin
Symbol Equivalent circuit Description
No.
10
11
13
14
15
16
19
20
26
25
27
28
34
33
35
36
FLT/SE/BHV
R/XW
CAP
VEE
W0X
W0Y
W1X
W1Y
W2X
W2Y
W3X
W3Y
W4X
W4Y
W5X
W5Y
VCC
VEE
GND
100 10k
10
VCC
VEE
GND
100k
3Vf
11
VCC
VEE
13
VCC
VEE
GND
151619
20 25
26
27
28 33
34 35
36
Head unsafe detection output.
Servo Bank Write Enable input.
Buffered Head Voltage output.
Read / Write control signal input.
Read when high, Write when low.
Connect an external capacitor of Read
amplifier between this pin and VEE.
–3 V power supply.
Inductive heads for Write.
Six channels are provided.
—6—
CXA3238TN/CXA3239TN
Pin
Symbol Equivalent circuit Description
No.
17
18
21
22
24
23
29
30
32
31
37
38
R0X
R0Y
R1X
R1Y
R2X
R2Y
R3X
R3Y
R4X
R4Y
R5X
R5Y
VCC
VEE
171821
22 23
24
29
30 31
32 37
38
MR heads for Read.
Six channels are provided.
—7—
CXA3238TN/CXA3239TN
Pin Description CXA3239TN
Pin
Symbol Equivalent circuit Description
No.
1
2
3
17
4
5
6
7
9
8
RS
SCLK
SDATA
SDEN
WDX
WDY
VCC
GND
RDX
RDY
VCC
VEE
GND
250
VBGR
≈1.3V
1
VCC
VEE
GND
2
3
17
14k
7.5k
2Vf
VCC
VEE
GND
100
100
4
5
VCC
VEE
GND
8
9
100
1.8mA
Bias current setting resister is connected
between this pin and GND.
Serial control signal input.
Differential P-ECL write data input.
5 V power supply.
Ground
Read amplifier output with coupling
capacitors.
High impedance in the write mode.
—8—
CXA3238TN/CXA3239TN
—8—
Pin
Symbol Equivalent circuit Description
No.
10
11
12
13
14
15
21
22
16
18
19, 20
FLT/SE/BHV
NC
R/XW
CAP
VEE
VCC
VEE
GND
100 10k
10
VCC
VEE
GND
100k
3Vf
16
VCC
VEE
18
Head unsafe detection output.
Servo Bank Write Enable input.
Buffered Head Voltage output.
Non Connection
Read / Write control signal input.
Read when high, Write when low.
Connect an external capacitor of Read
amplifier between this pin and VEE.
–3 V power supply.
—9—
CXA3238TN/CXA3239TN
Pin
Symbol Equivalent circuit Description
No.
23
24
29
30
33
34
35
36
25
26
27
28
31
32
37
38
W0X
W0Y
W1Y
W1X
W2Y
W2X
W3X
W3Y
R0X
R0Y
R1Y
R1X
R2Y
R2X
R3X
R3Y
VCC
VEE
GND
2335243629
30 33 34
Inductive heads for Write.
Four channels are provided.
MR heads for Read.
Four channels are provided.
VCC
VEE
28 31 32
25
37 38
26 27
Loading...