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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)： | 50/63頁(yè) |
| 文件大小： | 257K |
| 代理商： | P32P4911A |
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1996 Jul 25
50
Philips Semiconductors
Product specification
PRML Read Channel with PR4,
8/9 ENDEC, FWR Servo
P32P4911A
AGC Control Section
The input signals are DC coupled into TPC
±
with TPC
±
selected as inputs.
Symbol
Parameter
Pulse Qualifier Characteristics
Unless otherwise specified, a 100 mVpp sine wave at 15 MHz is AC coupled into VIA
±
. FC = 127, and FB = 0.
D
UAL
L
EVEL
Q
UALIFIER
See above for input conditions unless otherwise specified.
Symbol
Parameter
Test Conditions
Min.
Nom.
Max.
Unit
TPC+/
TPC-,
TPD+/
TPD-
I
D
Common Mode Input
Voltage
For test only
VPA-1.5
V
Decay current
Normal
FASTREC = Low, SG = Low
DR = Data Rate Register
37 < DR < 127
FASTREC = Low, SG = High
TPC+ = TPC-
FASTREC = High
TPC+ = TPC-
|TPC+ - TPC-| = 0.7875V
FASTREC = Low
|TPC+ - TPC-|
≥
1.09V
FASTREC = Low
|TPC+ - TPC-| = 0.7875V
FASTREC = High
0
≤
AGC
≤
3
AGC = AGC1-0
DR = data rate register
37 < DR <127, RR(k
)
HOLD = Low, V
BYP
= VRC
HOLD = Low, V
BYPS
= VRC
-100
μ
A
≤
Io
≤
+500
μ
A
-24.5
μ
A
Servo Mode Decay current
Normal
Fast Decay Current
-24.5
μ
A
I
DFR
8 * I
D
A
I
CH
Normal Attack Current
-17 * I
D
A
I
CHF
Fast Attack Current
-143 * I
D
A
I
CHFR
Fast Recovery Attack
Current
Sample Data AGC
Peak Charge and
Discharge Currents
-64 * I
D
A
+/-2.66
* 10
* AGC
* DR/RR
A
BYP
BYPS
VRC
Pin Leakage Current
Pin Leakage Current
Reference Voltage
-70
-70
VPA - 2.56
+50
+50
VPA - 2.1
nA
nA
V
Test Conditions
Min.
Nom.
Max.
Unit
L
th
Data Level Threshold
Prior to SFC
L
th
(mV) = 10.47 * LD
16
≤
LD
≤
63
After SFC
ALE = 0
L
(mV) = 7.44 * LD
ALE = 1
L
th
(mV) = 1.574 * LD
16
≤
LS
≤
63
LS
th
(mV) = 10.47 * LS
16
≤
LS
≤
63
RDSPW = 0
RDSPW = 1
L
-11%
L
th
L
+11%
V
L
-11%
L
th
L
+11%
V
LS
th
Servo Level Threshold
LS
-11%
7.7
16.8
LS
th
LS
+11%
20
35
V
RDS/RDS pulse width High
voltage
15
27
ns
ns
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