SI598 Datasheet, PDF (5/28 Pages) Silicon Laboratories – Programmable with 28 parts per trillion frequency resolution

Si598/Si599
2. Electrical Specifications
Table 1. Recommended Operating Conditions
Parameter
Symbol Test Condition
Min
Typ
Max Units
3.3 V option
2.97
3.3
3.63
V
Supply Voltage¹
V_DD
2.5 V option
1.8 V option
2.25
2.5
2.75
V
1.71
1.8
1.89
V
Supply Current
Output enabled
LVPECL
—
120
130
mA
I_DD
CML
LVDS
—
108
120
mA
—
99
110
mA
CMOS
—
90
100
mA
Output Enable (OE)²,
Serial Data (SDA),
Serial Clock (SCL)
Tristate mode
—
60
V_IH
0.75 x V_DD
—
V_IL
—
—
75
mA
—
V
0.5
V
Operating Temperature Range
T_A
–40
—
85
ºC
Notes:
1. Selectable parameter specified by part number. See Section 7. Ordering Information on page 22 for further details.
2. OE pin includes a 17 k pullup resistor to V_DD for OE Active High Option. OE pin includes 17 kpull down for OE
Active Low. See Section “7.Ordering Information”.
Table 2. V_C Control Voltage Input (Si599)
(Typical values TA = 25 ºC, V_DD = 3.3 V, min/max limits VDD = 1.8 ±5%, 2.5 or 3.3 V ±10%, TA = –40 to 85 ºC unless otherwise
noted)
Parameter
Symbol Test Condition
Min
Typ
Max Units
Control Voltage Tuning Slope^1,2,3
K_V
10 to 90% of V_DD
—
45
—
ppm/V
—
95
—
ppm/V
—
125
—
ppm/V
—
185
—
ppm/V
—
380
—
ppm/V
Control Voltage Linearity⁴
L_VC
BSL
–5
±1
+5
%
Incremental
–10
±5
+10
%
Modulation Bandwidth
BW
9.3
10.0
10.7
kHz
V_C Input Impedance
V_C Input Capacitance
Nominal Control Voltage
Control Voltage Tuning Range
Z_VC
C_VC
V_CNOM
V_C
@ f_O
500
—
—
k
—
50
—
pF
—
V_DD/2
—
V
0
—
V_DD
V
Notes:
1. Positive slope; selectable option by part number. See 7. Ordering Information on page 22.
2. For best jitter and phase noise performance, always choose the smallest K_V that meets the application’s minimum APR
requirements. See “AN266: VCXO Tuning Slope (K_V), Stability, and Absolute Pull Range (APR)” for more information.
3. K_V variation is ±10% of typical values.
4. BSL determined from deviation from best straight line fit with V_C ranging from 10 to 90% of V_DD. Incremental slope
determined with V_C ranging from 10 to 90% of V_DD.
Rev. 1.0
5