Philips TDA5360

1998 July 30

Philips Semiconductors Objective Specification, Revision 2.2

Pre-Amplifier for Hard Disk Drive with

MR-Read / Inductive Write Heads TDA5360

8Measurement Register M4...M0 = 5 bits for Rmr/Temperature digitazation (read back only bits)

RANGE1,RANGE0 = 2bits to define which measurement to be done

(0,0) RMR measurement for 15Ω < Rmr < 46Ω

Rmr = 698 / (15.5 + M0 + 2*M1 + 4*M2 + 8*M3 + 16*M4)

(0,1) and (1,0) : RMR measurement for 40Ω < Rmr < 90Ω

Rmr = 2094 / ( 21 + M0 + 2*M1 + 4*M2 + 8*M3 + 16*M4 )

(1,1) = Temperature measurement

Temp = 473K - 4.6K * (M0 + 2*M1 + 4*M2 + 8*M3 + 16*M4)

DIGON = is set HIGH to launch a digitazation

( Note 8 )

9Operating mode

if LOW, 3.3V compatible.

if HIGH, 5.0V compatible.

RSTDMY = define functionality of DRN pin

( Note 9a)

MODE1,MODE0 = 2 power management control bits.

(0,0) Sleep Mode

(0,1) Standby Mode

(1,0) Active Mode or STW one head

(1,1) Test Mode or STW two heads

(Note 9b)

11 Thermal Asperity

Compression ENFST = when TAC is enable, this bit defines BFAST functionality

( Note 11a)

TAU = Low Pole Frequency time constant of the TAC

LOW =700 ns

HIGH =70 ns

TACT2,TACT1,TACT0 = 3 bits to determine the TAC threshold

(0,0,0) =4.00 mV

(0,0,1) =2.97 mV

(0,1,0) =2.21 mV

(0,1,1) =1.64 mV

(1,0,0) =1.22 mV

(1,0,1) =0.91 mV

(1,1,0) =0.67 mV

(1,1,1) =0.50 mV

( Note 11b )