Datasheet

LTC6991
5
6991fb
TYPICAL PERFORMANCE CHARACTERISTICS
Frequency Error vs R
SET
Frequency Drift vs Supply Voltage Typical V
SET
Distribution
V
SET
Drift vs I
SET
V
SET
Drift vs Supply V
SET
vs Temperature
Frequency Error vs Temperature Frequency Error vs Temperature Frequency Error vs Temperature
V
+
= 3.3V, R
SET
= 200k, T
A
= 25°C unless otherwise noted.
V
SET
(V)
0.98
0
100
50
150
200
250
0.996 1.004 1.012
1.02
0.988
6991 G06
NUMBER OF UNITS
2 LOTS
DFN AND SOT-23
1274 UNITS
I
SET
(µA)
0
–1.0
0
0.4
0.2
0.6
0.8
1.0
10 15
20
–0.4
–0.2
–0.6
–0.8
5
6992 G07
V
SET
(mV)
REFERENCED TO I
SET
= 10µA
SUPPLY (V)
2
–1.0
0
0.4
0.2
0.6
0.8
1.0
45
6
–0.4
–0.2
–0.6
–0.8
3
6991 G08
DRIFT (mV)
REFERENCED TO V
+
= 4V
TEMPERATURE (°C)
–50
0.980
1.000
1.010
1.005
1.015
1.020
02550
100 125
0.995
0.990
0.985
–25
75
6991 G09
V
SET
(V)
3 PARTS
TEMPERATURE (°C)
–50
ERROR (%)
1
2
3
25 75
6991 G01
0
–1
–25 0
50 100 125
–2
–3
GUARANTEED MAX OVER TEMPERATURE
GUARANTEED MIN OVER TEMPERATURE
R
SET
= 50k
3 PARTS
TEMPERATURE (°C)
–50
ERROR (%)
1
2
3
25 75
6991 G02
0
–1
–25 0
50 100 125
–2
–3
GUARANTEED MAX OVER TEMPERATURE
GUARANTEED MIN OVER TEMPERATURE
R
SET
= 200k
3 PARTS
TEMPERATURE (°C)
–50
ERROR (%)
1
2
3
25 75
6991 G03
0
–1
–25 0
50 100 125
–2
–3
GUARANTEED MAX OVER TEMPERATURE
GUARANTEED MIN OVER TEMPERATURE
R
SET
= 800k
3 PARTS
R
SET
(k)
0
–3
ERROR (%)
–2
–1
0
1
2
3
3 PARTS
200 400 600 800
6991 G04
GUARANTEED MAX OVER TEMPERATURE
GUARANTEED MIN OVER TEMPERATURE
SUPPLY VOLTAGE (V)
2
–0.5
DRIFT (%)
–0.4
–0.2
–0.1
0
0.5
0.2
3
4
6991 G05
–0.3
0.3
0.4
0.1
5
6
REFERENCED TO V
+
= 4.5V
R
SET
= 50k
R
SET
= 200k
R
SET
= 800k