tza1000 NXP Semiconductors, tza1000 Datasheet - Page 12

• Manufacturer Part Number: tza1000
• Description: Qic Read-write Amplifier
• Manufacturer: NXP Semiconductors

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
Philips Semiconductors
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
Status
A status byte, located at address FF, contains the following status bits:
Table 16 Status byte settings
Notes
1. Actual gain. Allows the gain to be determined while the AGC is on.
2. This bit can be used for microcontroller gain control, with the AGC off (see Table 17).
3. Power failure detected on the +5 V supply (V
4. Write unsafe detected: head open or short circuited.
5. Power failure detected on the +12 V supply (V
Table 17 Sense current range select.
1998 Mar 17
ADDRESS
QIC read-write amplifier
and
125
------------------------------------- - mA
FF
30
-------------------------------- - mA
128
W
128
+
S
1
AG3
WDM
+
D7
1
0
1
(1)
(R
ref
when SDB = 1 (R
SDB
DN
0
1
0
1
= 430 ).
AG2
D6
(1)
AG1
ref
D5
EXPECTED INPUT SIGNAL
= 430 ).
(1)
DD1
DD3
).
).
AG0
WDI
WD
D4
12
(1)
DN
D3
(2)
can be decreased
can be increased
PF5
CURRENT
0 to 15 mA
0 to 30 mA
D2
15
-------------------------------- - mA
GAIN
(3)
128
S
FUNCTION
bypassed
+
Preliminary specification
WUS
1
D1
on
(4)
TZA1000
when SDB = 0
PF12
D0
(5)