P32P4911A Datasheet, PDF (53/63 Pages) NXP Semiconductors – PRML Read Channel with PR4, 8/9 ENDEC, FWR Servo

Philips Semiconductors
PRML Read Channel with PR4,
8/9 ENDEC, FWR Servo
Product specification
P32P4911A
Programmable Filter Characteristics (Continued)
Symbol
Parameter
Test Condition
TGD Variation
ƒc = 34 MHz
Fin = 0.3ƒc to ƒc
0 ≤ FB ≤ 127
ƒc = 12 MHz to 34 MHz
Fin =0.3 ƒc to ƒc
0 ≤ FB ≤ 127
ƒc = 4 MHz to 12 MHz
Fin = 0.2ƒc to ƒc
0 ≤ FB ≤ 127
ƒc = 12 MHz to 34 MHz
Fin = ƒc to 1.75ƒc
0 ≤ FB ≤ 127
VRX
Group delay equalization
accuracy
ON+ - ON- output
noise voltage,
no boost
ON+ - ON- output
noise voltage,
max. boost
Rx pin voltage
Rx resistance
ƒc = 4 MHz to 12 MHz
Fin = ƒc to 1.75ƒc
0 ≤ FB ≤ 127
Fc = 12-34 MHz, FB = 0 db
% GD = (0.9783 * FGB) - 0.665
BW=100 MHz, Rs=50 Ω
ƒc = 34 MHz, boost = 0 dB
AGC gain = 24 dB fixed
BW=100 MHz, Rs=50 Ω
ƒc = 34 MHz; FB = 127
AGC gain = 24 dB fixed
T_amb = 27°C
T_amb = 125°C
1% fixed value
Min.
-700
Nom. Max. Unit
+700 ps
-5
-5
ps
-5
-5
ps
-6
-6
ps
-6
+6
ps
+5
3.7
%
mV rms
6.8
mV rms
600
mV
800
mV
10.0
kΩ
Transversal Filter Characteristics
Symbol
Parameter
Test Conditions
Min.
Nom.
Max.
Unit
Km1 Range
±0.15
±0.2
V/V
Km1 Gain Drift
EQHOLD = 1
Hold time < 1 ms
0.015
0.05
V/V/ms
Km2 Range
-0.15
+0.13125
Km2 Resolution
0.01875
Km2 Accuracy
±5
±20
%
Note: Km1 and the equalizer control voltage at TPA+ - TPA- is approximately related by Km1 = 0.009 * Data Rate
(Mbit/s) * (TPA+ - TPA-).
1996 Jul 25
53