參數(shù)資料
型號： TZA1000
廠商： NXP SEMICONDUCTORS
元件分類： 光電元器件
英文描述： QIC read-write amplifier(QIC讀寫放大器)
中文描述： 1 CHANNEL READ WRITE AMPLIFIER CIRCUIT, PDSO24
封裝： 7.50 MM, PLASTIC, MS-013AD, SOT137-1, SOP-24
文件頁數(shù)： 12/24頁
文件大小： 132K
代理商： TZA1000
1998 Mar 17
12
Philips Semiconductors
Preliminary specification
QIC read-write amplifier
TZA1000
Table 14
Write mode select; note 1
Note
1.
Control bits W0 to W6 make up a 7-bit number between 0 and 127. Write current is
W
1
+
(
)
×
128
(R
ref
= 430
).
Table 15
Sense current range select; note 1
Note
1.
Control bits S0 to S6 make up a 7-bit number between 0 and 127. Sense current is
when SDB = 0
and
when SDB = 1 (R
ref
= 430
).
Status
A status byte, located at address FF, contains the following status bits:
Table 16
Status byte settings
Notes
1.
2.
3.
4.
5.
Actual gain. Allows the gain to be determined while the AGC is on.
This bit can be used for microcontroller gain control, with the AGC off (see Table 17).
Power failure detected on the +5 V supply (V
DD1
).
Write unsafe detected: head open or short circuited.
Power failure detected on the +12 V supply (V
DD3
).
Table 17
Sense current range select.
WDM
EXPECTED INPUT SIGNAL
FUNCTION
0
1
WDI
WD
on
bypassed
SDB
CURRENT
0
1
0 to 15 mA
0 to 30 mA
ADDRESS
D7
D6
D5
D4
D3
DN
(2)
D2
D1
D0
FF
AG3
(1)
AG2
(1)
AG1
(1)
AG0
(1)
PF5
(3)
WUS
(4)
PF12
(5)
DN
GAIN
0
1
can be increased
can be decreased
125
15
S
1
+
(
)
×
128
30
S
1
+
(
)
×
128
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