Datasheet

LTC6995-1/LTC6995-2
3
699512fa
For more information www.linear.com/LTC6995-1
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, RST = 0V for LTC6995-1,
RST = V
+
for LTC6995-2, DIVCODE = 0 to 15 (N
DIV
= 1 to 2
21
), R
SET
= 50k to 800k, R
LOAD
= 5k, C
LOAD
= 5pF unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
OUT
Output Clock Period 1.024m 34,360 Seconds
f
OUT
Output Frequency 29.1µ 977 Hz
∆f
OUT
Frequency Accuracy (Note 4) 29.1µHz ≤ f
OUT
≤ 977Hz
l
±0.8 ±1.5
±2.2
%
%
∆f
OUT
/∆T Frequency Drift Over Temperature
l
±0.005 %/°C
∆f
OUT
/∆V
+
Frequency Drift Over Supply V
+
= 4.5V to 5.5V
V
+
= 2.25V to 4.5V
l
l
0.23
0.06
0.55
0.16
%/V
%/V
Long-T
erm Frequency Stability (Note 11) 90 ppm/√kHr
Period Jitter (Note 10) N
DIV
= 1
N
DIV
= 8
15
7
ppm
RMS
ppm
RMS
BW Frequency Modulation Bandwidth 0.4 • f
OUT
Hz
t
S
Frequency Change Settling Time (Note 9) 1 Cycle
Analog Inputs
V
SET
Voltage at SET Pin
l
0.97 1.00 1.03 V
∆V
SET
/∆T V
SET
Drift Over Temperature
l
±75 µV/°C
R
SET
Frequency-Setting Resistor
l
50 800 kΩ
V
DIV
DIV Pin Voltage
l
0 V
+
V
∆V
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 nA
Power Supply
V
+
Operating Supply Voltage Range
l
2.25 5.5 V
Power-On Reset Voltage
l
1.95 V
I
S
Supply Current R
L
= ∞, R
SET
= 50k V
+
= 5.5V
V
+
= 2.25V
l
l
135
105
170
135
µA
µA
R
L
= ∞, R
SET
= 100k V
+
= 5.5V
V
+
= 2.25V
l
l
100
80
130
105
µA
µA
R
L
= ∞, R
SET
= 800k V
+
= 5.5V
V
+
= 2.25V
l
l
65
55
100
85
µA
µA
R
L
= ∞, I
SET
= 0µA V
+
= 5.5V
V
+
= 2.25V
60
52
µA
µA