GC-CVC2.10 pages

Two-channel Charge to Voltage Converter
GC-CVC2.1
Features:
The GC-CVC2.1 is a universally configurable, two-channel, synchronous
analogue charge to voltage converter. The principle of operation is the
excitation of the capacitive sensor element and the measurement of the
resuming charge flow.
Stacked Dice
(GC-CVC2.1 on Sensor)
GC-CVC2.1
This Mixed Signal IC consists of the following functional blocks:
Digital part with SPI interface, registers, EEPROM cell, clock
generator and automatic sequence control
Power-On-Reset, internal reference voltage generation via adjustable band gap
11 bit ADC with six parallel Sample-and-Hold circuits
Driver to generate the sensor excitation voltages for normal operation and self-test mode
Two charge amplifiers with adjustable sensor offset- and integration capacities
Two Sample-and-Hold amplifiers
Two operational amplifiers for signal conditioning
Two Rail-to-Rail output amplifiers
Analogue multiplexer for selecting test and reference voltages
Temperature sensor
Block to support SIL (Safety Integrity Level) relevant operation and test sequences (self-test during
Power-ON, redundant operation of two inversely phased sensor elements of the same sensitive axis )
XCA
XEP
X_CHAMP
XEP
XCF
X_SHAMP
GAIN
X_GOAMP
X_FAMP
XEN
AVDD
AVSS
XCINT
XM
15.0k
OFFSET
XEN
7.5k
XOUT
XCOFF
XGOAMP
RAIL-TO-RAIL
XESW
XEN VREF
DISCHARGE
XGAIN
VXPEP
VXPEN
VYPEP
REFDACP
VREFB
REFDACN
VREF
VXPEP
VYPEN
REFDACP
VREFB
Treiber
VXPEN
VXPO
VREF
FAILOUT
SIL-Block
VREFB
VYPEP
XOUT
YOUT
AVDD
XCA
YCA
YEP
VYPEN
YEN
FAILOUT
DVDD (+5V)
DVSS
DIGITAL
TEMP
SENS
CVC 2.1
CLOCK
nRESET
SELFTEST
BUSY
EEPROM
SAMPLE
nCS
SCLK
MOSI
MISO
DISCHARGE
VREF
AVDD
VREFB
DVDD
YGAIN
YEP
YEN VREF
VYPO
POR
/RESET
VREF
VREF
SAMPLE
DISCHARGE
YESW
YEP
YOUT
7.5k
OFFSET
15.0k
YM
YEN
GAIN
YEN
YCINT
Y_CHAMP
Y_SHAMP
YCA
Document: 14210-IB-1-0-E-CVC2.1
VT2
RAIL-TO-RAIL
YGOAMP
YCOFF
YEP
nFAILOUT
XEN
VXPO
VYPO
VREF
XEP
11BIT
REFDACN
VTEMP
VT1
SAMPLE
SPI
XEP
XOUT
Y_GOAMP
Y_FAMP
YOUT
AVDD
AVSS
YCF
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