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