cxa1940n Sony Electronics, cxa1940n Datasheet
cxa1940n
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cxa1940n Summary of contents
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... Read/Write Amplifier for Thin Film Head of Hard Disk Drive For the availability of this product, please contact the sales office. Description The CXA1940N is a Read/Write Amplifier for the thin film head of hard disk drives and designed to handle up to 4-channel heads. Features • ...
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... I W • Operating temperature Topr • Storage temperature Tstg • Allowable power dissipation P Recommended Operating Conditions • Supply voltage V • Write current mAo-p –20 to +75 °C –55 to +150 °C 375 mW D 5V± mAo-p —2— CXA1940N ...
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... V CC GND V CC 1.4V 2.1V GND V CC 2.1V GND —3— CXA1940N Description Head. 4 channels provided. Write unsafe detection output. Open collector output. When it is off in Write mode, it means an error is detected. Write data input. At “High” “Low”, input is triggered. 5V power supply Head select signal input. ...
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... No. Symbol Equivalent circuit 16 RDX 16 17 RDY Description V CC Read Amplifier output. GND setting resistor for the write current value is connected between this pin and GND. 1.25V GND —4— CXA1940N ...
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... CC and I starts to flow voltage is set to V Input voltage SG1 : 1mVp-p, 300kHz Load resistance (RDX, RDY Test point : V4 [Vp-p] AV= Frequency at which A lowers by 3dB —5— CXA1940N =5V, Ta=25°C, Write current I =20mA) W Typ. Max. Unit ...
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... Test point : V Selected head input voltage : 0mV Unselected head input voltage SG1 : 100mVp-p, 5MHz When the Read amplifier output is V CS=20 log +20 log A Test point : OFFR 2 Test point : V —6— CXA1940N Typ. Max. Unit 0.55 0.7 [Vrms 100 ...
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... the time required for Write current to reach R 90% from 10 the same time required to F reach 10% from 90%. L =0µ —7— CXA1940N =20mA, L (Head W H Refer to Fig Fig. 4 Min. Typ. Max. Unit 4.4 5.2 Vp-p 280 1000 kHz 0.6 0 ...
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... A 0.1µ I1 SG2 33 0.1µ 0.1µ SG1 AMP 1µ 1µ 8. 1µH 1µH 1µH —8— CXA1940N 1µ 500kHz PG PG1 5. Fig 1µ 5V 5.1k ...
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... Timing Chart 1 WDI R RDX RDY Timing Chart 2 50% WDI 10% WUS T SA2 50% 90% 10% T 90% Fig. 3 50% 90% 90% 10 50% Fig. 4 —9— CXA1940N 50 10 90% T SA1 50% ...
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... Modes are set as shown in Table 1 using R/W and PS pins. Head selection Heads are selected as shown in Table 2 using HS0 and HS1 pins. R/W PS Mode L L Write H L Read H H Power save Table 1. Mode selection HS0 HS1 Head Table 2. Head selection —10— CXA1940N ...
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... In power save Power supply ON/OFF detection V is monitored to avoid incorrecting Write. CC Recording and Playback functions are inhibited as detected as abnormal when V power supply ON/OFF detector threshold voltage (V released When V is higher than —11— CXA1940N decreases below the , the above inhibition is ...
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... Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party and other right due to same. +5V PULSE DETECTOR 1µ 1µH 1µH 1µH —12— CXA1940N 5. ...
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... VFB must be more than 2V. When V frequency becomes more than 1MHz. The normal operating area of write unsafe detection circuit is changed by head inductance, head DC resistance, write current and other. 1. < 2V possible that Write unsafe detection maximum FB —13— CXA1940N =2V GND ...
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... Iw=20mA +I 50% 50% 50 Fig. 6 Write current setting constant vs Write current 148 146 144 142 140 5 30 —14— CXA1940N V =5V, Ta=25°C CC Min. Typ. Max. Unit 15 pF 230 310 390 0.7 1 0.2 mAp-p – ...
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... OFF ON 3.9 ON OFF 3.8 – Ambient temperature Ta (°C) Fig. 8 Normalized write current vs Ambient temperature 1.01 1.00 0.99 0.98 – Ambient temperature Ta (°C) Fig. 10 Normalized read amplifier voltage gain vs Ambient temperature 1.01 1.00 0.99 0.98 – Ambient temperature Ta (°C) 75 —15— CXA1940N ...
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... SONY CODE EIAJ CODE JEDEC CODE 20PIN SSOP (PLASTIC) 6.5 ± 0 0.05 0.65 ± 0.12 0.15 – 0.02 0° to 10° DETAIL A PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT SSOP-20P-L01 SSOP020-P-0044 LEAD MATERIAL PACKAGE WEIGHT —16— CXA1940N + 0.2 1.25 – 0.1 0.1 0.1 ± 0.1 EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.1g ...