tda5360uk NXP Semiconductors, tda5360uk Datasheet - Page 31

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

Philips Semiconductors
5. The noise figure is defined as :
where Av is the gain and Vnout is the noise voltage at the output of the amplifier
6. See Section 11 for Serial Interface timing diagrams
7. This tWR is defined for a specific load on RDP,RDN reader outputs :
8. When changing MR bias current, from SEN to 90% of I
1998 July 30
Pre-Amplifier for Hard Disk Drive with
MR-Read / Inductive Write Heads
tWR is the time between R/Wn going HIGH and the time when :
AND
Changing the load of the preamp will change tWR according to the new RC time constant.
NF[dB] = 10xlog[(Vnout/Av)
90% of the signal envelop is present at RDPch-RDNch
the differential DC decaying at RDPch-RDNch is below 10mV :
R/Wn
10mV
R
MR
RDPch-RDNch
tWR
A
v
RDP
RDN
31
MR
2
bias current.
/ (4kTxR
270pF
270pF
MR
RDPch
RDNch
)]
330 Ohm
Objective Specification, Revision 2.2
TDA5360