TYPICAL PERFORMANCE CURVES
At T
A
= +25°C, V
S
=
±15V,
unless otherwise noted.
FULL-SCALE FREQUENCY
vs EXTERNAL ONE-SHOT CAPACITOR
10M
18
16
QUIESCENT CURRENT vs TEMPERATURE
Full Scale Frequency (Hz)
Quiescent Current (mA)
14
12
10
8
6
4
2
I
Q
+
1M
I
Q
–
100k
R
IN
= 40kΩ
10k
10pF
100pF
1nF
10nF
100nF
0
–50
–25
0
25
50
75
100
125
External One-Shot Capacitor
Temperature (°C)
REFERENCE VOLTAGE
vs REFERENCE LOAD CURRENT
5.01
Full Scale Frequency (ppm/°C)
TYPICAL FULL SCALE GAIN DRIFT
vs FULL SCALE FREQUENCY
1000
5
V
REF
(V)
4.99
100
A Grade,
S Grade
B Grade
4.98
Short Circuit
Current Limit
4.97
4.96
0
2
4
6
8
10
12
14
16
18
20
22
Output Current (mA)
10
10k
100k
1M
10M
Full Scale Frequency (Hz)
JITTER vs FULL SCALE FREQUENCY
500
Frequency Repeatability (%)
0.001
0.0008
FREQUENCY COUNT REPEATABILITY
vs COUNTER GATE TIME
17
400
Jitter (ppm)
0.0006
0.0004
300
f
FS
= 100kHz
18
200
0.0002
f
FS
= 1MHz
0.0001
1ms
19
100
0
10k
100k
1M
10M
10ms
Time
100ms
1s
Full Scale Frequency (Hz)
Jitter is the ratio of the 1
σ
value of the distribution of the period
(1/f
OUT
, max) to the mean of the period.
This graph describes the low frequency stability of the VFC110:
the ratio of the 1
σ
point of the distribution of 100 runs (where
each mean frequency came from 1000 readings for each gate
time) to the overall mean frequency.
®
VFC110
4
Repeatability (Bits)
BURR-BROWN [ BURR-BROWN CORPORATION ]
