QT118H-IS View Datasheet(PDF) - Quantum Research Group
Part Name
Description
Manufacturer
QT118H-IS Datasheet PDF : 13 Pages
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4.1 ABSOLUTE MAXIMUM SPECIFICATIONS
Operating temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . as designated by suffix
Storage temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55OC to +125OC
VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to +6.5V
Max continuous pin current, any control or drive pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20mA
Short circuit duration to ground, any pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . infinite
Short circuit duration to VDD, any pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . infinite
Voltage forced onto any pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to (Vdd + 0.6) Volts
4.2 RECOMMENDED OPERATING CONDITIONS
VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.5 to 5.5V
Short-term supply ripple+noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5mV
Long-term supply stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100mV
Cs value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10nF to 500nF
Cx value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 100pF
4.3 AC SPECIFICATIONS Vdd = 3.0, Ta = recommended operating range
Parameter
Description
Min
Typ
Max
Units
Notes
TRC
Recalibration time
TPC
Charge duration
TPT
Transfer duration
TBS
Burst spacing interval
TBL
Burst length
TR
Response time
FP
Piezo drive frequency
TP
Piezo drive duration
TPO
Pulse output width on Out
THB
Heartbeat pulse width
550
ms
2
µs
2
µs
75
ms
0.5
50
ms depends heavily on Cs, Cx
129
ms with minimal Cs
4
kHz
75
ms
75
ms
300
µs
4.4 SIGNAL PROCESSING
Description
Threshold differential
Hysteresis
Consensus filter length
Positive drift compensation rate
Negative drift compensation rate
Post-detection recalibration timer duration (typical)
Note 1: Pin options
Note 2: Of signal threshold
Note 3: Pin option
Note 4: Cs, Cx dependent
Min Typ Max
6, 12, or 24
17
4
750
75
10
60
Units
counts 1
%
2
samples
ms/level 4
ms/level 4
secs
3, 4
Notes
lq
9
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