cxa1720q Sony Electronics, cxa1720q Datasheet
cxa1720q
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cxa1720q Summary of contents
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... Read/Write Amplifier (with Built-in Filters) for FDDs For the availability of this product, please contact the sales office. Description The CXA1720Q for use with floppy disk drives, and contains a Read circuit (with built-in filters), Write circuit, Erase circuit, and supply voltage detection circuit, all into a single chip. ...
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... Note) WRITE DATA, WRITE CURRENT, WRITE GATE, ERASE GATE SIDE1, FILTER CONTROL, HIGH DENSITY, HIGH GAIN, POWER SAVE – Topr –20 to +75 °C Tstg –65 to +150 °C P 500 4 —2— CXA1720Q ...
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... Filter, time domain filter and Write current 1M/2M mode control. 2M mode is selected when the logical voltage is low. Pre-amplifier voltage gain selection. Gain of 100x is selected when the logical voltage is high; gain of 200x is selected when the logical voltage is low. —3— CXA1720Q (Ta=25 ° Description is below the specified value. CC ...
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... A.GND. 147 12 1.2V A.GND Analog system GND connection. Comparator differential inputs. Vcc 16k 10k 10k 147 147 60µ A.GND Filter differential outputs. Vcc 140 140 16 17 500µ A.GND —4— CXA1720Q Description between this pin and V to set the cut ...
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... Connection for 2M Write current compensation 28 resistor. Connect the Write current compensation resistor R between this pin and Pin 27 (W/C2SET) to WC2 A.GND set the amount of increase in the Write current. —5— CXA1720Q Description . set the Write current set the Write current. CC ...
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... Vcc 30 Erase current output for the HEAD1 system. 31 D.GND Power saving signal input. When the logical voltage is low, the power Vcc 162k saving mode. In power saving mode, only the power supply ON/OFF detection function operates. 1k 2.1V A.GND —6— CXA1720Q Description ...
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... V V0 BW0 SW4= =– BW1 SW4=a, b SW1, 5=b Bandwidth=400 Hz EN0 to 1 MHz Vi=0, SW4=b Bandwidth=400 MHz EN1 SW4=b Vi=0, SW1, 5=b —7— CXA1720Q (Ta=25 ° ment Min. Typ. Max. Unit point — 13.0 23.0 33.0 — 8.0 14.0 20.0 mA — 0.9 1.8 (Ta=25 °C) ment Min. Typ. ...
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... = = Vi=0.25 mVp mVp f=62.5 kHz Refer to Fig. 1 —8— CXA1720Q (Ta=25 ° ment Min. Typ. Max. Unit point F, G –500 +500 mV G 1.8 Vp –100 +100 2.8 Vp –10 ...
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... Monostable multivibrator No. 1 pulse width precision When HD = high ETM1 = –1 100 (%) 2.45 µS When HD is low ETM1' = –1 100 (%) 1.25 µS • Monostable multivibrator No. 2 pulse width = T • Peak shift 1 T – 100 (%) —9— CXA1720Q 1.4V TB ...
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... HD=“L” FC=“L” Refer to Fig Refer to Fig Refer to Fig —10— CXA1720Q (Ta=25 ° ment Min. Typ. Max. Unit point D, E 153.0 170.0 187.0 kHz G 3.6 5.5 7 –7.6 –7.1 –6.6 ...
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... (N Fig. 2 Filter frequency response measurement conditions —11— f(Hz CXA1720Q ...
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... WRITE CURRENT = “L” W Measure- Measure- Conditions ment circuit VLD 2 VHD ILD IHD —12— CXA1720Q (Ta=25 ° ment Min. Typ. Max. point LKJI –7 +7 LKJI –1 +1 LKJI –10 +10 LKJI 10 L’K’J’I’ M’ ...
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... W COMP CXA1720Q D.GND 29 M' ERASE 30 OUT 0 N' ERASE 31 OUT 1 POWER 32 SAVE —13— CXA1720Q 3300p 15 C 3300p 27k 11 3. SW3 9 a 0.1µ FILTER OUT B COMP COMP ...
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... R : filter setting resistance ( —14— CXA1720Q is set by external resistor used as a reference O1 Filter output A 17 Amp. Filter output B 16 Gain; 8.0dB f ratio O 1.00 1 ...
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... The ground should be as large as possible. is determined by the resistor 84R + 180 (nS LOW 42R + 110 (nS) A HIGH A connected between Pin 25 and set by the resistor —15— CXA1720Q between Pin 12 and A and between Pin 27 and CC connected between Pin 25 and Pin WC ...
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... WRITE DRIVER ERASE DRIVER POWER CONTROL LOGIC SIDE 1 READ WRITE WRITE ERASE DATA DATA CURRENT GATE GATE —16— CXA1720Q C REF 0.1µ FILTER OUT A 17 FILTER OUT 3300P C A 3300P 15 COMP COMP IN A A.GND 13 R ...
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... Customization Filter frequency response In 2M/inner track mode, the filter frequency response can be changed as shown below Tertiary Butterworth No Q=0.577 (Differential characteristics) Tertiary Chebyshev (High-band noise cut-off) (Comprehensive characteristics) —17— CXA1720Q 1dBRp No. 3 ...
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... Butterworth 2M/outer track Butterworth Butterworth 2M/inner track Chebyshev (1 dB ripple) Note) The boxed item indicates the setting for the CXA1720Q. in 1M/outer track mode as 1.00 as shown in Table fixed at 1.2 times the LPF cut-off frequency fc. In addition, the 1.28fo ...
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... Phase –40 –50 –50 –100 –60 –150 –70 –200 10k 50k f 04 —19— CXA1720Q Vcc=5V, Ta=25˚C When HD=high, low 120 150 100M 1M/inner track V =5V, Ta=25˚ =3.2k F 200 150 100 Voltage gain 50 0 Phase – ...
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... Ta-Ambient temperature (˚C) —20— f=100KHz Vcc=5V Vin=10mVp-p (HG="H") Vin=5mVp-p (HG="L") NGV=GV/GV (Ta=25˚ 3.2k F Vcc 80 Ta=25˚C f=100KHz Vin=10mVp-p (HG="H") Vin=5mVp-p (HG="L") NGV=GV/GV (Vcc=5V Vcc Vcc=5V NTA=TA/TA (Ta=25˚C) When HD=high, low 12 R 27k A 80 CXA1720Q ...
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... Normalized read data pulse width vs. Ambient temperature 1.05 1.00 0.95 – Ta-Ambient temperature (˚C) —21— Ta=25˚C NTA=TA/TA (Ta=25˚C) When HD=high, low 12 R 27k A A Vcc=5V Ta=25˚ =84R 180 (ns) A LOW =42R 110 (ns) A HIGH 100 Vcc=5V NTB=TB/TB (Ta=25˚C) 80 CXA1720Q ...
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... Normalized write current vs. Supply voltage 1.05 1.00 0.95 4.0 5.0 6.0 Vcc-Supply voltage (V) —22— Ta=25˚C NTB=TB/TB (Vcc=5V) Vcc=5V NIW=IW/IW (Ta=25˚ WC1 WC2 12k 12k R 4. 4.3k Vcc Vcc 80 Ta=25˚C NIW=IW/IW (Vcc=5V WC2 WC1 12k 12k 4. Vcc Vcc CXA1720Q ...
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... Vcc-Supply voltage (V) —23— Vcc=5V Ta=25˚C IW=11.6/Rw (mA Vcc Vcc Vcc=5V NIWC=IWC/IWC (Ta=25˚ WC2 WC1 12k 12k R 4. 4.3k Vcc Vcc 80 Ta=25˚C NIWC=IWC/IWC (Vcc=5V WC2 WC1 12k 12k 4. Vcc Vcc CXA1720Q ...
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... OFF threshold voltage 3.8 3.7 – Ta-Ambient temperature (˚C) Normalized filter peak frequency vs. Ambient temperature 1.05 1.00 0.95 4.0 5.0 Ta-Ambient temperature (˚C) —24— Vcc=5V Ta=25˚C IWC=10.8/Rwc (mA) Rwc ( WC1 WC2 R 4. 4.3k Vcc Vcc (k ) 100.0 80 Vcc= (Ta=25˚ 3.2k F Vcc 6.0 CXA1720Q ...
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... Normalized filter peak frequency vs. Supply voltage characteristics 1.05 1.00 0.95 4.0 6.0 5.0 Vcc-Supply voltage (V) 1M/outer track peak frequency vs 250 200 150 2.0 3.0 4 —25— CXA1720Q Vcc= (Ta=25˚ 3.2k F Vcc Vcc=5V Ta=25˚ Vcc + F =527/R 5.8 (KHz ...
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... SONY CODE EIAJ CODE JEDEC CODE 32PIN QFP (PLASTIC 0.15 0.3 – 0.1 0.24 M PACKAGE MATERIAL LEAD TREATMENT QFP-32P-L01 QFP032-P-0707 LEAD MATERIAL PACKAGE MASS —26— CXA1720Q 0.1 + 0.35 1.5 – 0.15 + 0.2 0.1 – 0.1 + 0.1 0.127 – 0.05 0° to 10° EPOXY RESIN SOLDER PLATING 42 ALLOY 0.2g ...