Data Sheet

ZSSC3123
cLite™ Capacitive Sensor Signal Conditioner
Brief Description
Benefits
The ZSSC3123 is a CMOS integrated circuit for accurate
capacitance-to-digital conversion and sensor-specific
correction of capacitive sensor signals. Digital compensation of sensor offset, sensitivity, and temperature drift is
accomplished via an internal digital signal processor
running a correction algorithm with calibration coefficients
stored in a non-volatile EEPROM.
The ZSSC3123 is configurable for capacitive sensors with
capacitances up to 260pF and a sensitivity of 125aF/LSB
to 1pF/LSB depending on resolution, speed, and range
settings. It is compatible with both single capacitive
sensors (both terminals must be accessible) and
differential capacitive sensors. Measured and corrected
2
sensor values can be output as I C™*, SPI, PDM, or
alarms.
2
The I C™ interface can be used for a simple PC-controlled
calibration procedure to program a set of calibration
coefficients into an on-chip EEPROM. The calibrated
ZSSC3123 and a specific sensor are mated digitally: fast,
precise, and without the cost overhead of trimming by
external devices or laser.

Minimized calibration costs: no laser trimming, onepass calibration using a digital interface

Wide capacitance range to support a broad portfolio of
different sensor elements
Excellent for low-power battery applications
Features








Maximum Target input capacitance: 260pF
Sampling rates as fast as 0.7ms at 8-bit resolution;
1.6ms at 10-bit; 5.0ms at 12-bit; 18.5ms at 14-bit
st
nd
Digital compensation of sensor: piece-wise 1 and 2
rd
order sensor compensation or up to 3 order singleregion sensor compensation
st
nd
Digital compensation of 1 and 2 order temperature
gain and offset drift
Internal temperature compensation reference
(no external components)
Programmable capacitance span and offset
Layout customized for die-die bonding with sensor for
low-cost, high-density chip-on-board assembly
†
Accuracy as high as
±0.25% FSO@ -40 to 125°C, 3V, 5V, Vsupply ±10%

Interfaces

I²C™ or SPI interface—easy connection to a µC

PDM outputs (Filtered Analog Ratiometric) for both
capacitance and temperature

Up to two alarms that can act as full push-pull or opendrain switches
Physical Characteristics



Supply voltage: 2.3V to 5.5V
Typical current consumption 650μA down to 60μA
depending on configuration
Typical Sleep Mode current: ≤ 1μA at 85°C


Operation temperature: –40°C to +125°C
Die or TSSOP14 package
Available Support

ZSSC3123 SSC Evaluation Kit available: SSC
Evaluation Board, samples, software, documentation.


Support for industrial mass calibration available.
Quick circuit customization option for large production
volumes.
Application: Digital Output, Alarms
VSUPPLY
VDD
cLite™
Vcore
ZSSC3123
(2.3V to 5.5V)
0.1µF
0.1µF
Ready
VSS
GND
SDA/MISO
SCL/SCLK
SS
C0
Alarm_High
CC
Alarm_Low
* I2C™ is a registered trademark of NXP.
† See data sheet section 1.3 for restrictions.
For more information, contact us at [email protected]
© 2013 Zentrum Mikroelektronik Dresden AG — Rev. 1.62 — December 11, 2013. All rights reserved. The material contained herein may not be reproduced, adapted, merged,
translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
ZSSC3123
cLite™ Capacitive Sensor Signal Conditioner
ZSSC3123
ZSSC3123 cLite™ Capacitive Sensor Signal Conditioner
Block Diagram
VDD (2.3V to 5.5V)
Temp
Sensor
Vcore
Ref
Cap
Offset
Cap
EEPROM
0.1µF
CLK/Reset
Ready
SCL/SCLK
SDA/MISO
PDM
0.1µF
Sensor
C/A
C0
C0
CC
C1
C1
Ready/PDM_C
I2C / SPI
D
Alarm_Low/PDM_T
DSP
Low Alarm
SS
CDC
High Alarm
(Optional)
MUX
Alarm_High
ROM
Analog Core
VSS
Application: Analog Output
Output
Communication
Digital Core
Application: Differential Capacitance Input
V
0.1µF
0.1µF
VDD
cLite™
Vcore
ZSSC3123
PDM_C
SUPPLY
(+2.3V to 5.5V)
VSUPPLY
0.1µF
Cap.
Analog
Output
0.1µF
PDM_T
C0
GND
Temp
Analog
Output
ZSSC3123
VSS
SDA/MISO
C0
SCL/SCLK
SS
CC
LED
CC
cLite™
Vcore
Ready
VSS
GND
VDD
(+2.3V to 5.5V)
Alarm_High
C1
Alarm_High
Alarm_Low
Ordering Codes
Sales Code
Description
Package
ZSSC3123AA1B
ZSSC3123 die — Temperature range: -40°C to +125°C
Tested dice on un-sawn wafer
ZSSC3123AI1B
ZSSC3123 die — Temperature range: -40°C to +85°C
Tested dice on un-sawn wafer
ZSSC3123AA1C
ZSSC3123 die — Temperature range: -40°C to +125°C
Tested dice on frame
ZSSC3123AI1C
ZSSC3123 die — Temperature range: -40°C to +85°C
Tested dice on frame
ZSSC3123AA2
ZSSC3123 TSSOP14 — Temperature range: -40°C to +125°C – Lead-free package
Tube: add “T” to code; reel: add “R”
ZSSC3123AI2
ZSSC3123 TSSOP14 — Temperature range: -40°C to +85°C – Lead-free package
Tube: add “T” to code; reel: add “R”
ZSSC3123KIT
Kit
ZSSC3123 SSC Evaluation Kit: Communication Board, SSC Board, Sensor Replacement
Board, USB Cable, 5 IC Samples (software can be downloaded from www.zmdi.com/zssc3123)
Sales and Further Information
Zentrum Mikroelektronik Dresden AG
Global Headquarters
Grenzstrasse 28
01109 Dresden, Germany
Central Office:
Phone +49.351.8822.0
Fax
+49.351.8822.600
European Technical Support
Phone +49.351.8822.7.772
Fax
+49.351.8822.87.772
European Sales (Stuttgart)
Phone +49.711.674517.55
Fax
+49.711.674517.87955
ZMD America, Inc.
1525 McCarthy Blvd., #212
Milpitas, CA 95035-7453
USA
USA Phone +855.275.9634
Phone +408.883.6310
Fax
+408.883.6358
www.zmdi.com
[email protected]
Zentrum Mikroelektronik Dresden
AG, Japan Office
2nd Floor, Shinbashi Tokyu Bldg.
4-21-3, Shinbashi, Minato-ku
Tokyo, 105-0004
Japan
ZMD FAR EAST, Ltd.
3F, No. 51, Sec. 2,
Keelung Road
11052 Taipei
Taiwan
Phone
Fax
Phone
Fax
+81.3.6895.7410
+81.3.6895.7301
+886.2.2377.8189
+886.2.2377.8199
Zentrum Mikroelektronik Dresden
AG, Korea Office
U-space 1 Building
11th Floor, Unit JA-1102
670 Sampyeong-dong
Bundang-gu, Seongnam-si
Gyeonggi-do, 463-400
Korea
Phone +82.31.950.7679
Fax
+82.504.841.3026
DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Zentrum Mikroelektronik
Dresden AG (ZMD AG) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. The information furnished hereby is believed to be true
and accurate. However, under no circumstances shall ZMD AG be liable to any customer, licensee, or any other third party for any special, indirect, incidental, or
consequential damages of any kind or nature whatsoever arising out of or in any way related to the furnishing, performance, or use of this technical data. ZMD AG hereby
expressly disclaims any liability of ZMD AG to any customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any
liability of ZMD AG for any damages in connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty, tort
(including negligence), strict liability, or otherwise.
© 2013 Zentrum Mikroelektronik Dresden AG — Rev. 1.62 — December 11, 2013
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.