4.1 Absolute Maximum Specifications
Operating temperature range, Ta....................................................................... -40
O
C to +85
O
C
Storage temperature range, Ts........................................................................ -55
O
C to +125
O
C
V
DD
.....................................................................................................-0.5 to +7.0V
Max continuous pin current, any control or drive pin.............................................................. ±20mA
Short circuit duration to ground, any pin ..........................................................................infinite
Short circuit duration to V
DD
, any pin.............................................................................infinite
Voltage forced onto any pin................................................................... -0.6V to (Vdd + 0.6) Volts
4.2 Recommended Operating Conditions
V
DD
..................................................................................................... +2.5 to 5.0V
Supply ripple+noise......................................................................................5mV p-p max
Cs1, Cs2, Cs3................................................................................................. 100nF
Cs1, Cs2, Cs3 relative matching.................................................................................. ±5%
Output load, max............................................................................................. ±0.5mA
4.3 DC Specifications
Vdd = 5.0V, Cs1 = Cs2 = 100nF, 100ms rep rate, Ta = recommended range, all unless otherwise noted
bits7Acquisition resolutionA
R
µA±1Input leakage currentI
IL
1mA sourceVVdd-0.7High output voltageV
OH
4mA sinkV0.6Low output voltageV
OL
V2.2High input logic levelV
HL
V0.8Low input logic levelV
IL
Required for proper startup and calibrationV/s100Supply turn-on slopeV
DDS
@ 3VµA110Average supply currentI
DD
3
A
@ 5VµA180Average supply currentI
DD
5
A
@ 3VmA0.60.45Peak supply currentI
DD
3
P
@ 5VmA1.50.75Peak supply currentI
DD
5
P
NotesUnitsMaxTypMinDescriptionParameter
4.4 AC Specifications
Vdd = 5.0V, Cs1 = Cs2 = 100nF, Ta = recommended range, unless otherwise noted
kHz37 5SPI clock rateF
SPI
ms550Power-up delay to operateT
D
ms1QT Burst spacingT
BS
Modulated spread-spectrum (chirp)kHz1049892Sample frequencyF
QT
Variable parameter under host controlpF 0.6Touch SensitivityS
T
Under host controlms-Response timeT
R
NotesUnitsMaxTypMinDescriptionParameter
4.5 Signal Processing and Output
Depends on element linearity, layout%±3Position linearity
L
% of bursts; host controlled%±10Drift compensation rateD
R
% of threshold setting%12.5Hysteresis, touch sensingH
T
% of threshold setting%0Hysteresis, prox sensingH
P
Host controlled variable631Threshold, wheel touchT
T
Host controlled variable631Threshold, proxT
P
Both prox and touch detectioncounts1Detection integrator countsDI
NotesUnitsMaxTypMinDescriptionParameter
lQ
10 QT411-ISSG R6.01/1005
