4.5 DC SPECIFICATIONS
Vdd = 3.0, Cs = 10nF, Rs = 470K, Cx = 10pF, Gain = High, Ta = 20OC, unless otherwise noted.
Parameter
Description
Min
Typ
Max
Units
Notes
V
DDL
DD
Guaranteed min Vdd
Supply current
2.45
V
I
26
12
9.5
µA
µA
µA
@5.0V
@3.3V
@2.5V
V
DDS
Supply turn-on slope
Low input logic level
High input logic level
Low output voltage
100
2.2
V/s
V
Required for proper startup
OPT1, OPT2
V
IL
0.8
0.6
1
V
HL
V
OPT1, OPT2
V
OL
V
OUT, 4mA sink
OUT, 1mA source
OPT1, OPT2
V
OH
High output voltage
Input leakage current
Acquisition resolution
Sensitivity - high gain
Sensitivity - medium gain
Sensitivity - low gain
Vdd-0.7
V
I
IL
µA
bits
pF
pF
pF
A
R
8
S[1]
S[2]
S[3]
1.2
1.8
3.8
Cx = 10pF, Cs = 15nF; Figure 4-1
Cx = 10pF, Cs = 15nF; Figure 4-2
Cx = 10pF, Cs = 15nF; Figure 4-3
Figure 4-1 High Gain Sensitivity
and Range @ Vdd = 3V
Figure 4-2 Medium Gain Sensitivity
and Range @ Vdd = 3V
3.0
4.0
Cx=30pF
Cx=30pF
2.5
2.0
1.5
1.0
0.5
25pF
20pF
25pF
20pF
3.0
2.0
1.0
10pF
5pF
10pF
5pF
0pF
0pF
Valid operating range
Valid operating range
10
20
30
10
20
30
Cs, nF
Cs, nF
Figure 4-3 Low Gain Sensitivity
and Range @ Vdd = 3V
Figure 4-4 Typical Supply Current Vs Vdd
Rs = 470K, Cx = 10pF, Gain = High
40
35
30
25
20
15
10
5
8.0
6.0
4.0
2.0
Cx=30pF
25pF
Cs = 20nF
20pF
..
10pF
5pF
0pF
Cs = 10nF
Valid operating range
2.5
3
3.5
4
4.5
5
10
20
30
Vdd
Cs, nF
LQ
9
QT110 R1.04/0405
QUANTUM [ QUANTUM RESEARCH GROUP ]
