AK8857VQ Datasheet, PDF (12/105 Pages) Asahi Kasei Microsystems – Dual Channel Digital Video Decoder

[AK8857VQ]
(*3)To perform power-down, OE_A, OE_B and RSTN pins must always be brought to the voltage
polarity to be used or to ground level.
(6) Crystal circuit block
(Ta : -40~85˚C)
Parameter
Symbol Min
Typ
Max Units
Condition
Frequency
Frequency tolerance
f₀
Δf / f
27
MHz
±100 ppm
Load capacitance
CL
15
pF
Effective equivalent resistance Re
100 Ω
(*1)
Crystal parallel capacitance CO
0.9
pF
XTI terminal external
CXI
22
connection load capacitance
pF
CL=15pF
XTO terminal external
CXO
22
connection load capacitance
pF
CL=15pF
(*1) Effective equivalent resistance generally may be taken as Re = R1 x (1+CO/CL)², where R1
is the crystal series equivalent resistance.
Example connection
Rf
XTI pin
CXI = 22pF
AK8857VQ internal circuit
XTO pin
Rd (* 2)
External circuit
CXO = 22pF
(*2) Determine need for and appropriate value of limiting resistance (Rd) in accordance with
the crystal specifications.
AK8857VQ is hereafter the “AK8857”.
MS1189-E-01
-12-
2010/12