qt114 Quantum Research Group, qt114 Datasheet - Page 10

• Manufacturer Part Number: qt114
• Description: Qlevel? Sensor Ic
• Manufacturer: Quantum Research Group

4.1 ABSOLUTE MAXIMUM SPECIFICATIONS
Operating temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . as designated by suffix
Storage temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55
V
Max continuous pin current, any control or drive pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20mA
Short circuit duration to ground, any pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . infinite
Short circuit duration to V
Voltage forced onto any pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to (Vcc + 0.6) Volts
4.2 RECOMMENDED OPERATING CONDITIONS
V
Supply ripple+noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mV p-p max
Load capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 50pF
Cs value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10nF to 100nF
4.3 AC SPECIFICATIONS
4.4 SIGNAL PROCESSING
Note 1: Counts of burst
Note 2: Uninterrupted detection / non-detection: Strap option.
LQ
Description
Threshold, T1
Threshold, T2
Hysteresis
Slosh filter length, time
Slosh filter length, counts
CC
CC
Parameter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to +6.5V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.5 to 5.25V
N
T
T
T
T
T
T
T
T
T
PC
BS
HB
PT
BL
LC
R
Q
R
F
Charge duration
Transfer duration
Burst spacing interval
Burst length, time
Maximum burst length counts
Response time
QT pulse spacing
Pulse edge risetime
Pulse edge falltime
Heartbeat pulse width
Description
CC
, any pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . infinite
Vcc = 3.0, Ta = recommended operating range
Min
Min
300
0
6
Typ
Typ
500
350
250
150
190
75
80
15
2
4
6
4
3
10
Max
Max
400
3.5
14
seconds
counts
counts
counts
counts
counts
Units
Units
ms
ms
ms
µs
µs
µs
µs
ns
ns
Slosh filter disabled
Cx = 5pF
Cx = 5pF
Note 1
Note 1
Note 1
Note 2
Note 1
QT114 R1.04/1106
Notes
Notes
O
C to +125
O
C