Datasheet

LTC1799
4
1799fc
Typical perForMance characTerisTics
Peak-to-Peak Jitter vs Frequency
Supply Current
vs Output Frequency
Output Resistance
vs Supply Voltage
LTC1799 Output Operating at
20MHz, V
S
= 5V
LTC1799 Output Operating at
10MHz, V
S
= 3V
Frequency Variation
vs R
SET
Frequency Variation
Over Temperature
4
3
2
1
0
–1
–2
–3
–4
1 10 100 1000
1799 G01
R
SET
(kΩ)
VARIATION (%)
T
A
= 25°C
GUARANTEED LIMITS APPLY
OVER 5k TO 200k RANGE
TYPICAL
HIGH
TYPICAL
LOW
TEMPERATURE (°C)
–40
VARIATION (%)
0.50
0.25
0.75
1.00
20 60
1799 G02
0
–0.50
–0.25
–20 0
40 80
–0.75
–1.00
R
SET
= 31.6k
÷1 OR ÷10 OR ÷100
TYPICAL
HIGH
TYPICAL
LOW
OUTPUT FREQUENCY, f
OUT
(Hz)
0.2
JITTER (%)
0.4
0.7
0.1
0.3
0.5
0.6
1k 100k 1M 10M
100M
1799 G03
0
10k
÷100
÷10
÷1
OUTPUT FREQUENCY, f
OUT
(Hz)
1.0
SUPPLY CURRENT (mA)
1.5
2.5
3.0
4.0
4.5
1k 100k 1M 100M
1799 G04
0.5
10k
10M
3.5
2.0
0
÷100 (5V)
÷10 (5V)
÷1 (5V)
÷1 (3V)
÷10 (3V)
÷100 (3V)
T
A
= 25°C
C
L
= 5pF
R
L
= 1M
SUPPLY VOLTAGE (V)
2.5 3.0
40
OUTPUT RESISTANCE (Ω)
80
140
3.5
4.5
5.0
1799 G05
60
120
100
4.0
5.5
6.0
OUTPUT SINKING CURRENT
OUTPUT SOURCING CURRENT
T
A
= 25°C
12.5ns/DIV
1V/DIV
1799 G06
V
+
= 5V, R
SET
= 5k, C
L
= 10pF
25ns/DIV
1V/DIV
1799 G07
V
+
= 3V, R
SET
= 10k, C
L
= 10pF