www.austriamicrosystems.com/Capacitive-Sensors/AS1716 Revision 1.02 4 - 12
AS1716
Datasheet - Electrical Characteristics
6 Electrical Characteristics
Parameters are measured at VDDA = 4.5V to 5.5V, RLOAD = 100Ω serial to CLOAD = 10nF, T
A
= +25ºC and are refering to VSSA, unless other-
wise specified. Typical values are listed for reference only and will not be tested.
All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control)
methods.
Table 3. Electrical Characteristics
Symbol Parameter Condition Min Typ Max Unit
TAMB Operating Temperature Range -45 +125 °C
DC Electrical Characteristics
V
DDA Supply Voltage Range @ pin VDDA 4.5 5 5.5 V
I
DDA Supply Current @ pin VDDA 3 4.5 9 mA
PSRR
1
1. Guaranteed by design
Power Supply Rejection Ratio 6 dB
V
CM Common Mode input Range @ pins INN, INP VSSA VDDA V
CMRR Common Mode Rejection Ratio 55 dB
R
IN Differential Input Resistance between pins INN and INP 70 100 130 kΩ
VREF
Internal Common Mode Input
Voltage
INP shorted to INN
VDDA/2 -
2%
VDDA/2
VDDA/2
+2%
V
VOFF Offset Voltage
Gain1, V
INP = VINN @ VCM = VDDA/2,
@ pin OUT
V
REF -
10
VREF
+10
mV
VIL Logic Low (GA, GB) @ pin GA and GB 1.2 V
VIH Logic High (GA, GB) @ pin GA and GB 2.0 V
I
LEAK
Leakage Current (GA, GB) VDDA = 5V, Gain4 1 µA
V
HYST
1
Hysteresis @ pin GA and GB 100 200 mV
RPD
Pull-Down Resistor @ pin GA and GB 50 100 150 kΩ
Gain0.5 Overall gain 0.5 GA = GB = 1 0.5-10% 0.5 0.5+10%
Gain1 Overall gain 1 GA = 1, GB = 0 1-10% 1 1+10%
Gain2 Overall gain 2 GA = 0, GB = 1 2-5% 2 2+5%
Gain4 Overall gain 4 GA = GB = 0, default setting 4-5% 4 4+5%
R
L External Serial Resistor
R
L serial to CL
(see Figure 13 on page 8)
100 1k Ω
CL External Capacitive Load 0.01 10 nF
I
SHORT+ Positive Short Circuit Current
VOUT is driven to VDDA and VOUT is connected
to VSSA
25 mA
ISHORT- Negative Short Circuit Current
VOUT is driven to VSSA and VOUT is connected
to VDDA
25 mA
V
OUT-L
Output Range Low @ pin VOUT
VSSA+0
.05
V
V
OUT-H
Output Range High @ pin VOUT
VDDA-
0.05
V
AC Electrical Characteristics
fC
Filter Cut-off Frequency
V
DDA = 4.5V, GA = GB = 0, INP-INN = 1V
PP,
fIN
= 16kHz and 29kHz
16 23 29 kHz
THD Total Harmonic Distortion
V
DDA = 5V, fIN = 1kHz, INP-INN = 8V
PP
, Gain0.5
80 dB
V
NOISE RMS noise at OUT Gain4, fC = 50Hz - 23kHz 1
mV
RMS
