Datasheet

LTC6994-1/LTC6994-2
3
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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, IN = 0V, 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
DELAY
Delay Time 1µ 33.55 sec
∆t
DELAY
Delay Accuracy (Note 4) N
DIV
≥ 512
l
±1.7 ±2.3
±3.0
%
%
8 ≤ N
DIV
≤ 64
l
±2.4 ±3.4
±4.4
%
%
N
DIV
= 1
l
±3.8 ±5.1
±6.2
%
%
∆t
DELAY
/∆T Delay Drift Over Temperature N
DIV
≥ 512
N
DIV
≤ 64
l
l
±0.006
±0.008
%/°C
%/°C
Delay Change With Supply N
DIV
≥ 512 V
+
= 4.5V to 5.5V
V
+
= 2.25V to 4.5V
l
l
–0.6
–0.4
–0.2
–0.1
%
%
8 ≤ N
DIV
≤ 64 V
+
= 4.5V to 5.5V
V
+
= 2.7V to 4.5V
V
+
= 2.25V to 2.7V
l
l
l
–0.9
–0.7
–1.1
–0.2
–0.2
–0.1
0.4
0.9
%
%
%
Delay Jitter (Note 10) N
DIV
= 1 V
+
= 5.5V
V
+
= 2.25V
1.0
0.5
%
P-P
%
P-P
N
DIV
= 8 0.20 %
P-P
N
DIV
= 64 0.05 %
P-P
N
DIV
= 512 0.20 %
P-P
N
DIV
= 4096 0.03 %
P-P
t
S
Delay Change Settling Time (Note 9) t
MASTER
= t
DELAY
/N
DIV
6 • t
MASTER
µs
Power Supply
V
+
Operating Supply Voltage Range
l
2.25 5.5 V
Power-On Reset Voltage
l
1.95 V
I
S(IDLE)
Supply Current (Idle) R
L
= ∞, R
SET
= 50k, N
DIV
≤ 64 V
+
= 5.5V
V
+
= 2.25V
l
l
165
125
200
160
µA
µA
R
L
= ∞, R
SET
= 50k, N
DIV
≥ 512 V
+
= 5.5V
V
+
= 2.25V
l
l
135
105
175
140
µA
µA
R
L
= ∞, R
SET
= 800k, N
DIV
≤ 64 V
+
= 5.5V
V
+
= 2.25V
l
l
70
60
110
95
µA
µA
R
L
= ∞, R
SET
= 800k, N
DIV
≥ 512 V
+
= 5.5V
V
+
= 2.25V
l
l
65
55
100
90
µA
µA
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