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參數(shù)資料
| 型號： | TDA5153X |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 光電元器件 |
| 英文描述： | Pre-amplifier for Hard Disk Drive HDD with MR-read/inductive write heads |
| 中文描述： | 6 CHANNEL READ WRITE AMPLIFIER CIRCUIT, UUC48 |
| 封裝： | DIE |
| 文件頁數(shù)： | 14/28頁 |
| 文件大?。?/td> | 128K |
| 代理商： | TDA5153X |
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1997 Jul 02
14
Philips Semiconductors
Preliminary specification
Pre-amplifier for Hard Disk Drive (HDD)
with MR-read/inductive write heads
TDA5153
8.10.5.3
Thermal asperity detector
d2 = logic 1, d1 = don’t care, d0 = either logic or 1. Unlike
the above tests, the thermal asperity detection does not
use the RDx to RDy outputs. Thus, the reader is fully
operational. In case a thermal asperity is detected, it is
flagged at the HUS pin.
The threshold voltage for the thermal asperity detection is
2-bit programmable. These 2 bits consist of d0 (LSB) of
the test mode register (address = 0XXX0110), as the
MSB, and b2 of the compensation register
(address = 0XXX0111).
V
th
210
560 d0
280 b2
+
+
=
,
where d0 is d0 of test mode register and b2 is d2 of
capacitor compensation register.
8.10.6
W
RITE AMPLIFIER PROGRAMMABLE CAPACITORS
By default (d2 = d1 = d0 = logic 0) the programmable
capacitors are zero. These capacitors are used to improve
the performance of the write amplifier according to the
write amplifier output load.
8.10.7
H
IGH FREQUENCY GAIN ATTENUATOR POLE
REGISTER
By default (d3 = d2 = d1 = d0 = logic 0), the high
frequency gain attenuator is not active. The gain
(
) μ
V
attenuator provides a pole which limits the bandwidth and
reduces the high-frequency noise. The HF pole can be
used in combination with the HF zero in order to boost the
HF gain locally and yet limit the very high frequency noise
enhancement.
8.10.8
H
IGH FREQUENCY GAIN BOOST REGISTER
By default (d3 = d2 = d1 = d0 = logic 0), the high
frequency gain boost is not active. The gain boost provides
a zero which allows to optimize the bandwidth of the read
amplifier and to correct for attenuation caused by series
inductances in the leads between the MR-heads and the
read amplifier inputs.
8.10.9
S
ETTLE PULSE
By default (d2 = d1 = d0 = logic 0) the settle pulse has a
nominal duration of 3
μ
s. Its value can be programmed
from 2.125
μ
s to 3
μ
s according to the following formula:
4 d2
2 d1
1 d0
+
+
(
t
st
2
1
+
)
----------------------------------1
μ
s
+
=
8.10.10 A
DDRESS REGISTERS
; note 1
A7 A6 A5 A4 A3 A2 A1 A0
DESCRIPTION
0
0
0
0
0
0
1
0
configuration register:
d0 = 0: use data flip-flop; d0 = 1: by-pass data flip-flop
d1 = 0: the WDI inputs are PECL levels; d1 = 1: invalid
d2 = 0: write current inhibit active; d2 = 1: write current inhibit inactive
read mode: d3 = 0: HUS active; d3 = 1: HUS HIGH
write mode: d3 = 0: HUS active; d3 = 1: HUS LOW
d4 = 0: read gain nominal; d4 = 1: read gain nominal + 3 dB
d5 = 0: read amplifier OFF during write mode; d5 = 1: read amplifier ON
during write mode
power control register:
(d1, d0) = (0, 0): sleep mode
(d1, d0) = (1, 0) or (0, 1): standby mode
(d1, d0) = (1, 1): active mode (write or read)
head select register:
6 channels: (d2,d1,d0) = (0,0,0) to (1,0,1): H0 to H5
4 channels: (d2,d1,d0) = (0, 0, 1) to (1, 0, 0): H1 to H4
0
0
0
1
0
0
1
0
0
0
1
0
0
0
1
0
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相關代理商/技術參數(shù) |
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|---|---|
| TDA5155 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Pre-amplifier for Hard Disk Drive HDD with MR-read/inductive write heads |
| TDA5155X | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Pre-amplifier for Hard Disk Drive HDD with MR-read/inductive write heads |
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