Si550
1. Electrical Specifications
Table 1. Recommended Operating Conditions
Parameter
Symbol
Test Condition
3.3 V option
Min
2.97
2.25
1.71
—
Typ
3.3
2.5
1.8
90
Max
3.63
2.75
1.89
—
Units
1
V
DD
Supply Voltage
2.5 V option
V
1.8 V option
Supply Current
I
Output enabled
TriState mode
DD
mA
—
60
—
2
Output Enable (OE)
V
0.75 x V
—
—
—
IH
DD
V
V
—
0.5
85
IL
Operating Temperature Range
T
–40
—
ºC
A
Notes:
1. Selectable parameter specified by part number. See Section 3. "Ordering Information" on page 8 for further details.
2. OE pin includes a 17 kΩ pullup resistor to VDD. Pulling OE to ground causes outputs to tristate.
Table 2. VC Control Voltage Input
Parameter
Symbol
Test Condition
Min
Typ
Max
Units
1,2,3
Control Voltage Tuning Slope
K
10 to 90% of V
—
45
90
—
ppm/V
V
DD
135
180
4
Control Voltage Linearity
L
BSL
–5
–10
9.3
500
—
±1
±5
+5
+10
10.7
—
VC
%
Incremental
Modulation Bandwidth
BW
10.0
—
kHz
kΩ
V
V Input Impedance
Z
C
VC
Nominal Control Voltage
V
@ f
3/8 x V
DD
—
CNOM
O
Control Voltage Tuning Range
V
0
V
V
C
DD
Notes:
1. Positive slope; selectable option by part number. See Section 3. "Ordering Information" on page 8.
2. For best jitter and phase noise performance, always choose the smallest KV that meets the application’s minimum APR
requirements. See “AN266: VCXO Tuning Slope (KV), Stability, and Absolute Pull Range (APR)” for more information.
3. KV variation is ±28% of typical values.
4. BSL determined from deviation from best straight line fit with VC ranging from 10 to 90% of VDD. Incremental slope
determined with VC ranging from 10 to 90% of VDD
.
2
Preliminary Rev. 0.3