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PRODUCT SPECIFICATION
RC6564
5
P
Crystal Oscillator Internal Schematic
XTL-INK(1)
XTL-OUT(2)
GND-XTL (44)
V
CC
-XTL (43)
3.2K
3.2K
Q10
Q7
Q11
130
μ
A
230
μ
A
130
μ
A
450
μ
A
450
μ
A
Q12
Q18
Q17
The crystal oscillator is an ECL inverter. In order to function
correctly it needs to bias the XTL-Tnk with a choke to 5V
VCC_XTL power supply. The output is about 0.7V DC lower
than VCC_XTL with an approximate swing of 0.5Vpp at the
output. If the oscillator is note used, it is necessary to ground
XTL_Tnk with a decoupling capacitor. This minimizes the
high frequency parasitic oscillations at the XTL_Out.
Logic Feedthrough
The Logic Feedthrough in the IF section can be minimized
by taking the following precautions:
1.
The digital ground of ADC should be separate from
analog ground of IF section.
2.
All logic circuits in the neighborhood of RC6564 must
be decoupled with a T-filter (choke and capacitors). This
will minimize the noize radiated from the logic circuits.
3.
All logic lines from the ADC must be surrounded be a
good ground plane.
Absolute Maximum Ratings
(beyond which the device may be damaged)
1
Note:
1. Functional operation under any of these conditions is NOT implied. Performance and reliability are guaranteed only if Operating
Conditions are not exceeded.
Parameter
IF_IN+, IF_IN–,
IF_AGC, T_Strt
AD_IN
VCCRF,
VCCBB,
VCCHF, VCC2
VDDA, VDDD 1,2
Conditions
Min
Typ
Max
Units
V
Input Voltages
Gnd–0.3
V
CC
+0.3
A/D input voltage
Analog Supply Voltages
AGND
VDDA
13.5
V
V
Digital Supply Voltages
7
V