- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄368629 > TDA5153BG (NXP SEMICONDUCTORS) Pre-amplifier for Hard Disk Drive HDD with MR-read/inductive write heads PDF資料下載
參數(shù)資料
| 型號： | TDA5153BG |
| 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： | 4 CHANNEL READ WRITE AMPLIFIER CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, SOT-313, LQFP-48 |
| 文件頁數(shù)： | 13/28頁 |
| 文件大?。?/td> | 128K |
| 代理商： | TDA5153BG |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁當前第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
1997 Jul 02
13
Philips Semiconductors
Preliminary specification
Pre-amplifier for Hard Disk Drive (HDD)
with MR-read/inductive write heads
TDA5153
8.10
Operation of the serial interface
8.10.1
C
ONFIGURATION
d0
By default (d0 = logic 0), write data passes from the
write data input via the data flip-flop to the write driver.
The write driver toggles the current in the head at the
falling edges of
V
V
–
2
When d0 = logic 1, the flip-flop is not used. The signal
polarity is non-inverting from WDIx and WDIy to Wx and
Wy.
d1
By default (d1 = logic 0) the pre-amplifier senses PECL
write signals at WDIx and WDIy.
d1 should remain
logic 0
.
d2
By default, (d2 = logic 0) the write current is inhibited
under low supply voltage conditions. The write current
inhibit is made inactive by programming d2 to logic 1.
d3
By default (d3 = logic 0), in write mode low supply
voltage, open head, and other conditions are monitored
and flagged at HUS. If d3 = logic 1, HUS is LOW in write
mode and HIGH in read mode.
d4
The amplifier read gain may be programmed in the
configuration register. By default (d4 = logic 0), the read
gain is typically 160 with R
MR
= 28
. If d4 = logic 1, the
read amplifier typical gain is 3 dB higher (i.e. 226 if
R
MR
= 28
).
d5
In order to minimize the write-to-read recovery times,
the first stage of the read amplifier may be kept biased
during write mode. By default, (d5 = logic 0) the read
amplifier is powered-down during write mode, and the
fast settling procedure is activated after write-to-read
switching. If d5 = logic 1 the read amplifier is kept biased
during write mode, and the fast settling procedure still
occurs if the head is changed or the MR current is
re-programmed.
8.10.2
P
OWER CONTROL
By default d0 = d1 = logic 0, the pre-amplifier powers-up in
sleep mode. If d1 = logic 0, d0 = logic 1 or d1 = logic 1,
d0 = logic 0 the circuit goes in standby mode.
V
data
-------------------------------------
=
If d1 = d0 = logic 1, the circuit goes in active mode, (read
or write mode depending on the R/W input).
8.10.3
H
EAD SELECT
d2, d1 and d0 are used to select head H0 to H5 for the
6 channel version and to select head H1 to H4 for the
4 channel version.
8.10.4
S
ERVO WRITE
The circuit is prepared for servo writing. However, the chip
will not be guaranteed.
8.10.5
T
EST
d2 = d1 = d0 = logic 0. The circuit is not in test mode. This
is the default situation.
8.10.5.1
MR head test
d2 = logic 0, d1 = logic 0, d0 = logic 1. In read mode, the
voltages at Rx and Ry (at the top of the MR elements) of
the selected head are fed to RDx and RDy outputs. By
measuring the output voltages single-ended at two
different I
MR
currents, the MR resistance can be accurately
measured according to the following formula:
V
V
–
I
MRx1
I
MRx2
–
for the x side for instance.
Open head and head short-circuited to ground conditions
can therefore be detected.
d2 = logic 0, d1 = logic 1, d0 = logic 0. Same as before,
with the difference that I
MR2
is fixed to a minimum constant
value of 5 mA. Measuring in the same way as above with
I
MR1
> 5 mA, enables the detection of MR elements
connected together.
8.10.5.2
Temperature monitor
d2 = logic 0, d1 = logic 1, d0 = logic 1. The temperature
monitor voltages are connected to RDx and RDy. The
output differential voltage depends on the temperature
according to:
The temperature may be measured with a typical precision
of 5
°
C.
,
R
MRx
--------------------------------------
=
dV
0.00364
–
T
1.7
+
×
=
0
T
140
°
C
<
<
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA5634T | 9 V UHF mixer/oscillator for TV and VCR tuners |
| TDA5731M | Low power VHF, UHF andhyperband mixer/oscillator for TVand VCR 3-band tuners(應用于TV和 VCR三頻帶調(diào)諧的低功耗VHF，UHF和超頻帶混頻器/振蕩器) |
| TDA5732 | Low power VHF, UHF mixer/oscillator for TV and VCR 2-band tuners |
| TDA5732M | Low power VHF, UHF mixer/oscillator for TV and VCR 2-band tuners |
| TDA5744 | Low power mixers/oscillators for hyperband tuners |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA5153X | 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 |
| 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 |
| TDA5200 | 功能描述:射頻接收器 CNTRL RF RECEIVER 870MHZ 5V RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| TDA5200_10 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ASK Single Conversion Receiver |
發(fā)布緊急采購，3分鐘左右您將得到回復。