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參數(shù)資料
| 型號： | 935210150512 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 光電元器件 |
| 英文描述： | 1 CHANNEL READ WRITE AMPLIFIER CIRCUIT, PDSO24 |
| 封裝： | 7.50 MM, PLASTIC, SOT-137-1, SOP-24 |
| 文件頁數(shù)： | 12/26頁 |
| 文件大?。?/td> | 203K |
| 代理商： | 935210150512 |
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1998 Mar 17
2
Philips Semiconductors
Preliminary specication
QIC read-write amplier
TZA1000
FEATURES
3-wire serial interface for programming
On-chip Digital-to-Analog Converters (DAC) for:
– MR (Magneto Resistive) sense bias current
– MR DC bias current
– Write current
Low noise differential input stage: typically 0.65 nV/√Hz
(Zi =0 )
Magnetic feedback circuit to handle large output signals
MR DC bias current circuit
Very fast write current rise and fall times with near
rail-to-rail voltage swing
Maximum write current of 100 mA: ready for high
coercivity tape
Low noise read amplifier for reading track height servo
signals with the write coil
Very few external components required
On board registers for easy format or bit rate selection
Fast read-after-write recovery time
Test circuit for yoke-type heads
Switchable differentiator for yoke-type heads, with
programmable cut-off frequencies
Anti-aliasing low-pass filter, with programmable cut-off
frequencies
AGC (Automatic Gain Control) options: internally
(digitally) controlled, externally controlled or fixed gain
Hold input for fast AGC freeze
Input for fast reader/writer (track height servo) signal
selection
Power fail detection on both 5 and 12 V lines (status can
be read from the read register)
Write unsafe detection
Provides an accurate reference voltage (for AD
conversion)
Very simple interconnection with the SZA1000 QIC
digital equalizer
+5 V ±10% and +12 V ±10% supply voltages
Low power standby, active and test modes.
RELATED DOCUMENTS
SZA1000 QIC digital equalizer data sheet
Application notes for TZA1000 and SZA1000.
Both are available from Philips Semiconductors.
GENERAL DESCRIPTION
The TZA1000 is a single-chip read-write amplifier for
single-channel QIC (Quarter Inch Cartridge) systems with
MR heads. It can be used with both SIG (Sensor in Gap)-
and yoke-type MR heads and is designed to be used in
conjunction with the Philips SZA1000 digital equalizer IC
(although it can also function as a stand alone unit). This
combination is flexible enough to be used with all popular
tape backup formats including QIC 80, QIC 3010,
QIC 3020, QIC 3080, QIC 5010, Travan 1, Travan 2,
Travan 3 and Travan 4 and to be forward compatible with
their single channel successors.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VDD1
read circuit supply voltage
4.5
5
5.5
V
VDD2
FB and write circuit supply voltage
4.5
5
5.5
V
VDD3
sense current circuit supply voltage
10.8
12
13.2
V
IDD1;IDD2
read/FB and write circuit supply current
Read mode
69
mA
Write mode
Iwrite =30mA
105
mA
IDD3
sense current circuit supply current
Isense = 16 mA
15.0
16.2
19.0
mA
Vn(i)(eq)
equivalent input noise voltage
Zsource =0
0.65
0.8
nV/
√Hz
fclk
clock frequency
24
MHz
Tamb
recommended operating temperature
0
70
°C
Tj
recommended junction temperature
0
125
°C
Rth(j-a)
thermal resistance from junction to ambient
in free air
66
K/W
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