tda5360uk NXP Semiconductors, tda5360uk Datasheet - Page 17

• Manufacturer Part Number: tda5360uk
• Description: Pre-amplifier For Hard Disk Drive With Mr-read / Inductive Write Heads
• Manufacturer: NXP Semiconductors

Philips Semiconductors
10.6
1998 July 30
Nb
0
1
2
Pre-Amplifier for Hard Disk Drive with
MR-Read / Inductive Write Heads
Registers description
Register Name
Head Select Register
Control Register
Reader Bias Register
Contents
HS3..HS0 = 0,0,0,0 to 1,0,1,1 = H0 to H11
SELT : if HIGH, the multiple selection detector is enabled. Inactive in STW mode
SELF : is set HIGH if illegal MDS is detected (read back only bit)
( Note 0 )
LCS1,LCS0 : copy of CS1,CS0 pins state (read back only bits)
PORI : Select a MR Bias mode.
GMR : select the range to be used in current or power
RIN1,0 = define the input impedance of the reader.
(0,0)
(0,1)
(1,0)
(1,1)
RVORI = Reader output buffer mode.
LOW
HIGH
WVORI = Writer data inputs mode.
LOW
HIGH
( Note 1a)
BFCTL = Control of BFAST pin functionality
( Note 1b)
DUMMY : Dummy head is selected in read mode if LOW
PWR4...PWR0 = define Imr current/power.
Range according to GMR bit setting
Rmr current bias mode :
Rmr power bias mode :
GAIN1, GAIN0 = read amplifier gain.
(0,0)
(0,1)
(1,0)
(1,1)
SAL : Imr = 4mA+200uA*(pwr0 + 2 * pwr1 + 4 * pwr2 + 8 * pwr3 + 16 * pwr4)
GMR : Imr = 3mA+100uA*(pwr0 + 2 * pwr1 + 4 * pwr2 + 8 * pwr3 + 16 * pwr4)
SAL : Pwr = 1.5mW+250uW*(pwr0 + 2 * pwr1 + 4 * pwr2 + 8 * pwr3 + 16 * pwr4)
GMR : Pwr = 375uW+62.5uW*(pwr0 + 2 * pwr1 + 4 * pwr2 + 8 * pwr3 + 16 * pwr4)
= 44 dB
= 47 dB
= 50 dB
= Differentiator only
LOW = Current
HIGH = Power
LOW = SAL
HIGH = GMR
=
=
=
=
=
=
=
=
30
23
18
15
Voltage mode
Current mode
Voltage mode,
Current mode
17
Bias
Bias
range
range
Objective Specification, Revision 2.2
TDA5360