6/4-channel Read/Write Amplifier GMR-Ind Head Hard Disk Drive Des

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6/4-channel Read/Write Amplifier GMR-Ind Head Hard Disk Drive Des

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CXA3238TN/CXA3239TN
6/4-channel Read/Write Amplifier GMR-Ind Head Hard Disk Drive
Description CXA3238TN/CXA3239TN Read/Write amplifier GMR-Ind (Giant Magneto ResistiveInductive) heads used hard disk drives, capable supporting channels. Features power supply. Current bias voltage sense type. Drives heads (CXA3238TN) Drives four heads (CXA3239TN) power Read Differential read amplifier gain (RMR=50 Input noise 0.77 (typ.), RMR=50 IB=6.0 Recovery time write read nsec. (typ.) Write data triggered differential P-ECL signal. Servo bank write. (All channels) Write unsafe detection circuit. Serial port Head selection bias Write current Applications Hard disk drives with GMR-Ind heads. Structure Bipolar silicon monolithic TSSOP (Plastic)
Absolute Maximum Ratings (Ta=25 Supply voltage -0.3 Supply voltage -4.5 +0.3 Digital input voltage -0.3 VCC+0.3 Operating temperature Topr Storage temperature Tstg +150 Allowable power dissipation TSSOP38 1000 Operating Conditions Supply voltage bias voltage Bias current Write current
+4.4 +5.5 -4.0 -2.6 -300 +300
Sony reserves right change products specifications without prior notice. This information does convey license implication otherwise under patents other right. Application circuits shown, any, typical examples illustrating operation devices. Sony cannot assume responsibility problems arising these circuits.
E98346C8Y
CXA3238TN/CXA3239TN
Block Diagram Configuration CXA3238TN
SCLK SDATA
Serial Interface
Bias current source Write current source
DRIVER
DRIVER
FLT/SE/BHV R/XW
DRIVER
SDEN
DRIVER
DRIVER
DRIVER
CXA3238TN/CXA3239TN
CXA3239TN
SCLK SDATA
Serial Interface
Bias current source Write current source
DRIVER
DRIVER
DRIVER
FLT/SE/BHV
DRIVER
R/XW SDEN
CXA3238TN/CXA3239TN
Description
CXA3238TN Equivalent circuit Description
Symbol
VBGR 1.3V
Bias current setting resister connected between this GND.
SCLK SDATA SDEN
7.5k
Serial control signal input.
Differential P-ECL write data input.
power supply. Ground
1.8mA
Read amplifier output with coupling capacitors. High impedance write mode.
CXA3238TN/CXA3239TN
Symbol
Equivalent circuit
Description
FLT/SE/BHV
Head unsafe detection output. Servo Bank Write Enable input. Buffered Head Voltage output.
100k
R/XW
Read Write control signal input. Read when high, Write when low.
Connect external capacitor Read amplifier between this VEE.
power supply.
Inductive heads Write. channels provided.
CXA3238TN/CXA3239TN
Symbol
Equivalent circuit
Description
heads Read. channels provided.
CXA3238TN/CXA3239TN
Description
CXA3239TN Equivalent circuit Description
Symbol
VBGR 1.3V
Bias current setting resister connected between this GND.
SCLK SDATA SDEN
7.5k
Serial control signal input.
Differential P-ECL write data input.
power supply. Ground
1.8mA
Read amplifier output with coupling capacitors. High impedance write mode.
CXA3238TN/CXA3239TN
Symbol
Equivalent circuit
Description
FLT/SE/BHV
Head unsafe detection output. Servo Bank Write Enable input. Buffered Head Voltage output.
Connection
100k
R/XW
Read Write control signal input. Read when high, Write when low.
Connect external capacitor Read amplifier between this VEE.
power supply.
CXA3238TN/CXA3239TN
Symbol
Equivalent circuit
Description
Inductive heads Write. Four channels provided.
heads Read. Four channels provided.
CXA3238TN/CXA3239TN
Electrical Characteristics (Unless otherwise specified; VCC=5 VEE=-3 Ta=25 CAP=0.1 RS=7.5 Item Power Dissipation Bank write mode power supply current Symbol Measurement conditions IW=31 IB=6.0 ISP1 IID1 IRE1 IWR1 IID2 IRE2 IWR2 ICCBW SLEEP mode IDLE mode Read mode Write mode IDLE mode Read mode Write mode IW=31 Min. Typ. Max. Unit
power supply current
Digital Inputs input input voltage input high input voltage input input current Serial interface input input voltage Serial interface input high input voltage Serial interface input input current input Voltage range input Input amplitude input current input high input voltage input input voltage input differential voltage
ITTL VSIL VSIH VWDV VWDA VPIH
input; R/XW Pull-up resister High voltage voltage Serial input; SDATA, SCLK, SDEN
-100
VCC+
1000 +0.3
High voltage voltage -1000 Pull-down resister -2.5 Write data input Input voltage VDD-0.2 VDD=3.3 (VPIH-VPIL) -10-
VPIL Vdiff
VDD-0.5 VDD-0.3 1300
CXA3238TN/CXA3239TN
Item Bank Write Enable voltage Bank Write Enable current output voltage output high voltage gain accuracy
Symbol VSEH ISEH VFLTL VFLTH EBHV
Measurement conditions
Min. +1.2
Typ.
Max. +1.4
Unit
External resistance=2.4 External resistance=2.4
Read Characteristics R9-1 Gain High Gain frequency cut-off High frequency cut-off Input reflected noise bias current range bias accuracy bias resolution
IB="1,1,1" RMR=50 RMR=50 IB=6.0 [GAIN]=0 RMR=50 IB=6.0 IBR1 PSRR1 Exclusive Head noise RMR=50 IB=6.0 [GAIN]=1 RMR=50 IB=6.0
0.77
0.95
0.714
power supply rejection ratio power supply R9-2 rejection ratio Common mode R10-1 rejection ratio Common mode R10-2 rejection ratio Control line input noise rejection RDX/RDY offset difference magnitude RDX/RDY output impedance
Ripple voltage mVp-p Ripple voltage mVp-p PSRR2 Ripple voltage mVp-p CMRR1 Ripple voltage mVp-p CMRR2 Ripple voltage mVp-p CLRR VOFF1 RDro Write Read Differential, read mode
-11-
CXA3238TN/CXA3239TN
Item Read Safety Characteristics head open threshold head short threshold
Symbol
Measurement conditions
Min.
Typ.
Max.
Unit
MRop MRsh
Head Head Head Head `000' `011'
Write Characteristics Write current range Write current accuracy Write current resolution Leakage current Damping register Write current propagation delay time Write current rise/fall time Erase current accuracy ILEAK TR/TF LH=0, RH=0 Write DATA Write current RH=15 LH=150 IW=31 VCC=3.5 `0101' `0000' `1111' RH=0 Unselected head
Write Safety Characteristics Write head open threshold Head voltage when short frequency Write safety detect time threshold threshold threshold hysteresis fWDL transitions WDX/WDY Detect open head Detect short
VWthL Fault detected VWthH Fault removed Vhys
-12-
CXA3238TN/CXA3239TN
Item Switching Characteristics Write Read Read Write Idle Read
Symbol Measurement conditions IW=31 IB=6 Signal WDX/WDY signal TSR1 signal
Min.
Typ.
Max.
Unit
signal IB(*1) IB="0,1,1" signal IB(*1) S4-2 Sleep Read(A3239) TSR2 IB="0,1,1" Bank Write Characteristics IW=31 IB=6 S4-1 Sleep Read(A3238) Read Bank Write Bank Write Read
1000 2000
Idle Bank Write Idle Write Serial port timing time Hold time SCLK frequency SCLK pulse width SCLK-SDATA time SCLK-SDATA hold time SDEN time
SDEN first SCLK (sden) Last SCLK deassert SDEN (sden) (sclk) (sclk)
proportional external value
-13-
CXA3238TN/CXA3239TN
Serial port characteristics ADR1 ADR0 DATA5 DATA4 XSLP XIDL GAIN MROPN MRSHT DATA3 DATA2 DATA1 DATA0
IB<2-0> bits initialized power
Code Description XSLP XIDL HS<2-0> GAIN IB<2-0> MROPN MRSHT IW<3-0> Function pre-amp into power "sleep" mode preamplifier idle mode Head select pre-amp high gain mode. preamplifier high gain mode Activate test point pin. active. bias current head open detector active. head short detector active. write current
-14-
CXA3238TN/CXA3239TN
Mode Control
SLEEP XSLP=0
READ XSLP=1 XIDL=1 R/XW=H
IDLE XSLP=1 XIDL=0 R/XW=X
WRITE XSLP=1 XIDL=1 R/XW=L
Serial Port Timing Detail
(sclk) SDEN (sclk) (sden) (sden)
SCLK
SDATA
Serial Port Timing After SDEN goes high, last eight bits transferred into register. SCLK will shift data presented SDATA into internal shift register rising edge each clock. SCLK initial condition, both High signal acceptable.
-15-
CXA3238TN/CXA3239TN
Unsafe condition Write fault condition high level write fault condition. Open write head leads. Write head leads shorted ground. frequency low. Power supply tolerance. Read fault condition level read fault condition. Open short head. (This function serial register) Bank write control (refer `Bank write current Current accuracy' characteristic curve) Read mode. Force certain voltage(min.VCC+1.2V) FLT/SE using pull-up resister(Rse=820) #This operation disables Fault detection. case Erase mode only) Start write operation setting R/XW "L". Terminate write operation setting R/XW "H". Allow write duty less. voltage detector disabled Bank Write mode Erase mode. iii) Don't change serial register data bits following conditions VCC=3.5 entering Write data (Buffered Head Voltage) Applicable within VCC=5 Turn on,but turn MROPN MRSHT VBHV determined basis VCC. VBHV =VCC-4 (RMR+5.5 Head select table Head select, Normal operation none none
-16-
CXA3238TN/CXA3239TN
Head select table Head select, Normal operation none none none none
Bias (mA) 3.714 4.429 5.143 5.857 6.571 7.286
-17-
CXA3238TN/CXA3239TN
Write current Write current 0-P)
(*1) Actual head current defined following equation: Ihead=Iw/ (I+Rh/Rd) Head Resistance Damping Resistance (*2) Short terminal un-used head
-18-
CXA3238TN/CXA3239TN
CXA3238TN
SCLK SDATA
FLT/SE/BHV R/XW SDEN
TSSOP 38Pin pitch Package dimension including leads
-19-
CXA3238TN/CXA3239TN
CXA3239TN
SCLK SDATA
FLT/SE/BHV R/XW SDEN
TSSOP 38Pin pitch Package dimension including leads
-20-
CXA3238TN/CXA3239TN
Application Circuit CXA3238TN
7.5k
SCLK SDATA
0.1µF
FLT/SE/BHV R/XW SDEN 0.1µF 0.1µF
-21-
CXA3238TN/CXA3239TN
CXA3239TN
7.5k
SCLK SDATA
0.1µF
FLT/SE/BHV R/XW SDEN 0.1µF 0.1µF
-22-
CXA3238TN/CXA3239TN
Measurement Spec.Circuit
7.5k
SCLK SDATA CXA3238TN
180nH 180nH 180nH 180nH 180nH
3300µH 10µF 0.1µF
VPSRR Amp1 1000pF
0.1µF
2.4k
FLT/SE/BHV R/XW
Amp2
R/XW
3300µH
SDEN 10µF
100kHz 50MHz
VPSRR'
0.1µF
180nH
-23-
CXA3238TN/CXA3239TN
7.5k
SCLK SDATA CXA3239TN
180nH 180nH 180nH 180nH
3300µH 10µF 0.1µF
VPSRR Amp1 1000pF
0.1µF
2.4k
FLT/SE/BHV
Amp2
100kHz 50MHz
R/XW R/XW
3300µH
SDEN 10µF 0.1µF
VPSRR'
-24-
CXA3238TN/CXA3239TN
Normalized bias current Ambient temperature 1.04
VCC=5V VEE=-3V RMR=50 IBn="100" gain
Normalized bias current Power supply voltage 1.04
VEE=-3V RMR=50 IBn="100" gain Ta=25°C
1.02 IB/IB (Ta=25°C)
1.02 IB/IB (VCC=5V)
0.98
0.98
0.96 -25.0 25.0 50.0 75.0 Ambient temperature (°C)
0.96
Normalized read amplifier voltage gain Ambient temperature 1.04 1.04
Normalized read amplifier voltage gain Power supply voltage
VEE=-3V RMR=50 IBn="100" gain Ta=25°C
1.02 AV/AV (Ta=25°C) AV/AV (VCC=5V)
1.02
VCC=5V VEE=-3V RMR=50 IBn="100" gain
0.98
0.98
0.96 -25.0 25.0 50.0 75.0 Ambient temperature (°C)
0.96
Bank write current Current accuracy Bank write current accuracy Deviation Bank write current within basis chart Bank write current (mA) Bank Write (A3238) Bank Write (A3239) VCC=5V Ta=25°C RH=0 Read 170µs Write 30µs
-25-
CXA3238TN/CXA3239TN
Input refered noise voltage Ambient temperature 0.82
VCC=5V VEE=-3V RMR=50 IBn="100"
Normalized write current Ambient temperature 1.04
VCC=5V VEE=-3V IWn="1000"
1.02 IW/IW (Ta=25°C)
0.78 [nV/
0.76
0.98 0.74 0.96 -25.0 25.0 50.0 75.0 Ambient temperature (°C) -25.0 25.0 50.0 75.0 Ambient temperature (°C)
0.72
Normalized write current Power supply voltage 1.04 Power supply ON/OFF detector threshold voltage 4.15
Power supply ON/OFF detector threshold voltage Ambient temperature
1.02 IW/IW (VCC=5V)
VEE=-3V IWn="1000" Ta=25°C
ONOFF OFFON
4.05
0.98
3.95
0.96
3.85 -25.0 25.0 50.0 75.0 Ambient temperature (°C)
-26-
CXA3238TN/CXA3239TN
Package Outline
Unit
38PIN TSSOP(PLASTIC)
1.2MAX
0.225 0.075
0.15
0.25 0.05MIN
DETAIL
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE TSSOP-38P-L121 LEAD TREATMENT LEAD MATERIAL PACKAGE MASS EPOXY RESIN SOLDER PLATING COPPER ALLOY 0.1g
-27-

6/4-channel Read/Write Amplifier GMR-Ind Head Hard Disk Drive Des

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