Datasheet

LTC6906
6
6906fc
TEST CIRCUIT
V
+
GND
DIV
OUT
GRD
SET
LTC6906
EQUIVALENT CIRCUIT OF
OSCILLOSCOPE OR
FREQUENCY COUNTER PROBE
C
TEST
C
PROBE
R
SET
0.01%
10ppm/°C
C
TEST
= 1/(1/5pF – 1/C
PROBE
)
= 7.5pF FOR A 15pF SCOPE PROBE
R
PROBE
10M
SUPPLY
VOLTAGE
6906 F01
Figure 1. Test Circuit with 5pF Effective Load
EQUIVALENT INPUT AND OUTPUT CIRCUITS
Figure 2. V
+
Pin Figure 3. SET Pin Figure 4. GRD Pin
Figure 5. DIV Pin Figure 6. OUT Pin
6
V
+
20Ω
800pF
2
GND
6906 F02
6
V
+
4
SET
1k
2
GND
6906 F03
6
V
+
5
GRD
200Ω
TOTAL OUTPUT
RESISTANCE
2
GND
6906 F04
6
V
+
3
DIV
5M
5M
2
GND
6906 F05
6
V
+
1
OUT
300Ω
f
OUT
2
GND
6906 F06