BH6629BFS Datasheet, PDF (10/14 Pages) Rohm – Read /Write amplifier for FDD

Magnetic disk ICs
Logic input
FMode table
BH6629BFS
Total filter peak frequency setting
f0 = a / (RRCC [kΩ +0.09) [kHz]
a = 391 1M outer track
468 1M inner track
777 2M outer track
786 2M inner track
732 outer track (with OPTION 1), OPTION 2
777 inner track (with OPTION 1)
TDF time constant setting
250 [kbps] : T = 939
500 [kbps] : T = 403
RRCC [kΩ] +667 [ns]
RRCC [kΩ] +474 [ns]
Write current setting
Iwr =
24.0
RWCC [kΩ]
[mA]
572