LTC6991
5
6991fb
TYPICAL PERFORMANCE CHARACTERISTICS
Frequency Error vs RSET
Frequency Drift vs Supply Voltage
Typical VSET Distribution
VSET Drift vs ISET
VSET Drift vs Supply
VSET vs Temperature
Frequency Error vs Temperature
V+ = 3.3V, RSET = 200k, TA = 25°C unless otherwise noted.
VSET (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
ISET (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 ISET = 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
025
50
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
RSET = 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
RSET = 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
RSET = 800k
3 PARTS
RSET (kΩ)
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
RSET = 50k
RSET = 200k
RSET = 800k
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