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參數(shù)資料
| 型號(hào)： | P32P4911A |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類(lèi)： | 光電元器件 |
| 英文描述： | PRML Read Channel with PR4, 8/9 ENDEC, FWR Servo |
| 中文描述： | 1 CHANNEL READ CHANNEL, PQFP100 |
| 封裝： | 14 X 14 X 1.40 MM, PLASTIC, LQFP-100 |
| 文件頁(yè)數(shù)： | 51/63頁(yè) |
| 文件大小： | 257K |
| 代理商： | P32P4911A |
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1996 Jul 25
51
Philips Semiconductors
Product specification
PRML Read Channel with PR4,
8/9 ENDEC, FWR Servo
P32P4911A
V
ITERBI
Q
UALIFIER
See General for input conditions unless otherwise specified.
Symbol
Parameter
E
QUALIZATION
Q
UALITY
F
ACTOR
Unless otherwise specified, measured at ATO pin loaded with 5 pF. VIA
±
input signal has no asymmetry. Measured
after training sequences. Continuous Training pattern with zeros displaced by
±
10% of one's magnitude of 500 mV
Symbol
Parameter
Test Conditions
A
MPLITUDE
A
SYMMETRY
Q
UALITY
F
ACTOR
Unless otherwise specified, measured at ATO pin loaded with 5 pF. VIA
±
input signal has 10% amplitude asymmetry.
Asymmetry (%) = ((V
+1
-V
-1
)/(V
+1
+V
-1
)) * 100, where V
+1
= positive "1" sample value and V
-1
= negative "1" sample value.
This is measured with continuous training bytes, 93H, with distance between canceled and non-canceled zeros at 10 %
of one's magnitude of 500 mV or 100 mV.
Symbol
Parameter
Test Conditions
D
UAL
L
EVEL
Q
UALIFIER
(Continued)
Symbol
Parameter
Test Conditions
Min.
Nom.
Max.
Unit
PPOL to RDS/RDS delay
time
PPOL Edge to RDS/RDS
rise/fall, measured at 1.5V
crossing
15 pF load, 0.8 to 2.4V
15 pF load, 2.4 to 0.8V
Window and Hysteresis
LS
= 50%. Measured at
the rising/falling edge of
RDS/RDS
Fin = 5 MHz, FCS = 30
2.5
12
ns
PPOL, RDS/RDS Rise time
PPOL, RDS/RDS Fall time
Pulse pairing
8
6
+2.5
ns
ns
ns
-2.5
Test Conditions
Min.
Nom.
Max.
Unit
V
th
Viterbi threshold voltage
V
(mV) = 7.874 * VD
45
≤
VD
≤
127
V
th
- 11%
V
th
V
th
+11%
V
Min.
Nom.
Max.
Unit
Reference Voltage
No pulse asymmetry
ATOSEL1-0 = 00
Absolute deviation of zeros
is multiplied by gain
Typ.-130mV MAXREF/2
Typ.+130mV
V
Gain
600
mV
Drift
0.2
mV/
μ
s
Min.
Nom.
Max.
Unit
Reference Voltage
Qasym at ATO
ATOSEL1-0 = 00
Typ.-100mV
MAXREF/2
400
Typ.+100mV V
mV
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