LTC6990 Datasheet, PDF (3/28 Pages) Linear Technology – TimerBlox: Voltage Controlled Silicon Oscillator

LTC6990
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. Test conditions are V⁺ = 2.25V to 5.5V, OE = V⁺, DIVCODE = 0 to 15
(N_DIV = 1 to 128), R_SET = 50k to 800k, R_LOAD = 5k, C_LOAD = 5pF unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
f_OUT
Δf_OUT
Δf_OUT/ΔT
Δf_OUT/ΔV⁺
Output Frequency
Frequency Accuracy (Note 4)
Frequency Drift Over Temperature
Frequency Drift Over Supply
Recommended Range: R_SET = 50k to 800k
Extended Range: R_SET = 25k to 800k
Recommended Range
R_SET = 50k to 800k
Extended Range
R_SET = 25k to 800k
V⁺ = 4.5V to 5.5V
V⁺ = 2.25V to 4.5V
0.488
1000
0.488
2000
±0.8
±1.5
l
±2.2
±2.4
l
±3.2
l
±0.005
l
0.23
0.55
l
0.06
0.16
kHz
kHz
%
%
%
%
%/°C
%/V
%/V
Period Jitter (Note 10)
N_DIV = 1
N_DIV = 2
N_DIV = 128
Duty Cycle
N_DIV = 1, R_SET = 25k to 800k
N_DIV > 1, R_SET = 25k to 800k
BW
Frequency Modulation Bandwidth
t_S
Frequency Change Settling Time t_MASTER = t_OUT/N_DIV
(Note 9)
0.38
0.22
0.027
0.022
0.004
l 47
50
53
l 48
50
52
0.4•f_OUT
6•t_MASTER
%_P-P
%_P-P
%_RMS
%_P-P
%_RMS
%
%
kHz
μs
Analog Inputs
V_SET
Voltage at SET Pin
l 0.97
1.00
1.03
ΔV_SET/ΔT V_SET Drift Over Temperature
ΔV_SET/ΔV⁺ V_SET Drift Over Supply
l
±75
–150
ΔV_SET/ΔI_SET V_SET Droop with I_SET
–7
R_SET
Frequency-Setting Resistor
Recommended Range
Extended Range
l 50
800
l 25
800
V_DIV
DIV Pin Voltage
l
0
V⁺
ΔV_DIV/V⁺ DIV Pin Valid Code Range (Note 5) Deviation from Ideal V_DIV/V⁺ = (DIVCODE + 0.5)/16 l
±1.5
DIV Pin Input Current
l
±10
V
μV/°C
μV/V
Ω
kΩ
kΩ
V
%
nA
Power Supply
V⁺
Operating Supply Voltage Range
l 2.25
5.5
V
Power-On Reset Voltage
I_S
Supply Current
R_SET = 25k to 800k
l
R_L = ∞, N_DIV = 1, R_SET = 50k
V⁺ = 5.5V
l
V⁺ = 2.25V
l
R_L = ∞, N_DIV = 1 R_SET = 800k
V⁺ = 5.5V
l
V⁺ = 2.25V
l
R_L = ∞, N_DIV = 128, R_SET = 50k V⁺ = 5.5V
l
V⁺ = 2.25V
l
R_L = ∞, N_DIV = 128, R_SET = 800k V⁺ = 5.5V
l
V⁺ = 2.25V
l
1.95
V
235
283
μA
145
183
μA
71
105
μA
59
92
μA
137
180
μA
106
145
μA
66
100
μA
56
90
μA
6990p
3