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參數(shù)資料
| 型號： | PCA3006TPA |
| 英文描述： | Amplifier. Other |
| 中文描述： | 放大器。其他 |
| 文件頁數(shù)： | 2/9頁 |
| 文件大?。?/td> | 133K |
| 代理商： | PCA3006TPA |
PCA3000
AUGUST 1994
1
PCA3000
5V 6 CHANNEL MAGNETO-RESISTIVE READ/
THIN FILM WRITE PRE-AMPLIFIER
The GEC Plessey Semiconductors PCA3000 is a bipolar
monolithic integrated circuit designed for use with a
combined magneto-resistive read head and thin film write
head.
The GPS PCA3000 can be used in disk drive
applications with up to 6 channels, and provides the
necessary bias current for the MR head from a single 5
volt supply whilst keeping the voltage on the MR head to a
minimum.
CIRCUIT OPERATION
With the chip select input (
CS
) high the chip is put in its
idle state with supply current reduced to the minimum for
power saving.
With chip select low the function of the chip is controlled
by the read/write pin (
R/W
), and the head selection by the
HS pins.
CS
and
R/W
have internal pull-up resistors and
the HS pins have internal pull-down resistors.
FEATURES
I
Designed for operation with Single Stripe MR
Heads
I
Single +5 volt supply operation
I
High performance read circuit features
- Adjustable Bias Current
- Typical MR Head Voltage = 225mV
- Gain
- Input Noise
- Input Capacitance
- Bandwidth
= 5 to 15mA
= 320V/V
= 0.7nV/
√
Hz
max.
= 10pF typ.
= 60MHz
I
Thin Film Write Circuit Features
- 20:1 Programmable Write Current Source
- Minimum Head Voltage Swing 6Vpp
- Write Unsafe Indicator
-
Head Short to Ground Protection
- Power Supply Fault Protection
TARGET INFORMATION
DS3829 -1.5
Fig. 1 Block diagram
IWSET
TFC
WDI
WDI
HS0
HS1
HS2
DUMMY
CS
R/
W
FAST
C1
C2
CC
GND
DSBF
FAULT
RDX
RDY
WRITE
CURRENT
SOURCE
FAULT
DETECTOR
R0P R0N RIP RIN R2P R2N R3P R3N R4P R4N R5P R5N
IRSET
W0X W0Y W1X W1Y W2X W2Y W3X W3Y W4X W4Y W5X W5Y
HEAD
SELECT
MODE
SELECT
READ
BIAS
CURRENT
SOURCE
TOGGLE
G
G
G
G
WRITE CURRENT SWITCHES
READ PRE-AMPS
GNDR
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