4 Specifications
4.1 Absolute Maximum Specifications
Operating temp.......................................................................................-40ºC to +85ºC
Storage temp....................................................................................... -55
O
C to +125
O
C
V
DD..................................................................................................... 0 to +6.5V
Max continuous pin current, any control or drive pin.............................................................. ±20mA
Short circuit duration to V
SS, any pin............................................................................ infinite
Short circuit duration to V
DD, any pin............................................................................infinite
Voltage forced onto any pin................................................................... -0.6V to (V
DD + 0.6) Volts
CAUTION: Stresses beyond those listed under ‘Absolute Maximum Specifications’ may cause permanent damage
to the device. This is a stress rating only and functional operation of the device at these or other conditions
beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute
maximum s
ecification conditions for extended
eriods ma
affect device reliabilit
4.2 Recommended Operating Conditions
VDD....................................................................................................+2.0 to 5.5V
Short-term supply ripple+noise................................................................................. ±5mV
Long-term supply stability....................................................................................±100mV
Cs value............................................................................................... 2nF to 50nF
Cx value..................................................................................................5 to 20pF
4.3 AC Specifications
VDD = 3.0V, Cs = 10nF, Cx = 5pF, Ta = recommended range, unless otherwise noted
µs15Heartbeat pulse widthT
HB
ms100Response timeTR
Vdd, Cs and Cx dependent. See
Section 3.2 for capacitor selection.
ms20Burst lengthT
BL
Increases with reducing VDDms85
Time between end of burst and
start of the next (LP mode)
T
G
2
ms1
Time between end of burst and
start of the next (Fast mode)
T
G
1
±7.5% spread spectrum variationµs2Transfer durationTPT
±7.5% spread spectrum variationµs2Charge durationTPC
Cs, Cx dependentms250Recalibration timeTRC
NotesUnitsMaxTypMinDescriptionParameter
4.4 Signal Processing
(At 3V) Will vary in SYNC mode and with
V
DD
secs80Max on-duration
samples4Consensus filter length
counts2Hysteresis
counts10Threshold differential
NotesUnitsMaxTypMinDescription
lQ 7 QT100_3R0.09_0707
