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PDF TZA1000 Data sheet ( Hoja de datos )
| Número de pieza | TZA1000 | |
| Descripción | QIC read-write amplifier | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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INTEGRATED CIRCUITS
DATA SHEET
TZA1000
QIC read-write amplifier
Preliminary specification
Supersedes data of 1998 Mar 11
File under Integrated Circuits, IC01
1998 Mar 17
1 page  
Philips Semiconductors
QIC read-write amplifier
Preliminary specification
TZA1000
PINNING
SYMBOL PIN
DESCRIPTION
TYPE(1)
WX
1 write current to head
O
VSS1
WY
WD
2 large signal ground
3 write current to head
4 write data
P
O
I(2)
VDD1
INA
5 large signal +5 V
6 read signal from MR
P
I
INB
7 read signal from MR
I
ISENSE 8 sense current for MR
O
VDD3
SCLK
SDEN
9 +12 V for sense current
supply
10 serial interface clock
11 serial interface enable
P
I(2)
I(2)
SDIO
HOLD
WGATE
CLK
12 serial interface data I/O
13 hold AGC; active LOW
14 write gate; active LOW
15 clock input
I/O
I(2)
I(2)
I(2)
VSS2
VDD2
OUTB
16 small signal ground
17 small signal +5 V
18 output to equalizer
P
P
O
OUTA
19 output to equalizer
O
Vref
Iref
RESET
20 2 V reference output
21 current reference resistor
22 reset for microcontroller;
active LOW
O
note 3
O
BIASB
23 bias current for yoke heads O
BIASA
24 bias current for yoke heads O
Notes
1. Pin type abbreviations: O = output, I = input,
P = power supply.
2. Digital inputs: LOW: <0.3VDD ; HIGH: >0.7VDD.
3. Use only for connecting current reference resistor.
handbook, halfpage
WX 1
24 BIASA
VSS1 2
23 BIASB
WY 3
22 RESET
WD 4
VDD1 5
INA 6
INB 7
21 Iref
20 Vref
19 OUTA
TZA1000
18 OUTB
ISENSE 8
VDD3 9
SCLK 10
17 VDD2
16 VSS2
15 CLK
SDEN 11
14 WGATE
SDIO 12
13 HOLD
MGG659
Fig.2 Pin configuration.
See Chapter “Equivalent pin circuits” for the I/O
configuration of the analog pins.
1998 Mar 17
5
5 Page 
Philips Semiconductors
QIC read-write amplifier
Preliminary specification
TZA1000
Table 8 HPF circuit
DIFF
0
1
HPF CIRCUIT
bypassed
on
Table 9 Variable gain circuit input select
HSM
0
0
0
0
1
1
1
1
1
HOLD
X
X
X
X
1
1
1
1
0
AI1
0
0
1
1
0
0
1
1
X
AI0
0
1
0
1
0
1
0
1
X
INPUT
servo preamplifier
preamplifier
bias output −10 dB
bias output −4 dB
servo preamplifier
preamplifier
bias output −10 dB
bias output −4 dB
servo preamplifier
Table 10 Bias circuit input
FBI1
0
0
1
1
FBI0
0
1
0
1
INPUT
no signal
preamplifier
test generator
preamplifier
Table 11 Preamplifier gain
PG1
0
0
1
1
PG0
0
1
0
1
GAIN
0
34 dB
4 dB
40 dB
Table 12 AGC setting
HSM
0
0
1
1
X
HOLD
1
0
1
0
X
GFXD
0
0
0
0
1
AGC
on
frozen at last value
on
no AGC at servo mode: maximum gain
off, gain set by G0 to G3; note 1
Note
1. Control bits G0 to G3 make up a 4-bit number used to program the gain in 1 dB steps (from 4 to 19 dB if G6DB is 0,
from 10 to 25 dB if G6DB is 1; see Table 13).
Table 13 Variable gain circuit range select
G6DB
0
1
RANGE
4 to 19 dB
10 to 25 dB
1998 Mar 17
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet TZA1000.PDF ] | |
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