ZSSC3122 cLite™ Low Voltage Capacitive Sensor Signal Conditioner Brief Description Benefits The ZSSC3122 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 ZSSC3122 is configurable for capacitive sensors with capacitances up to 10pF and a sensitivity of 125aF/LSB. It is compatible with both single capacitive sensors (both terminals must be accessible) and differential capacitive sensors. Measured and corrected sensor values can be 2 * output as I C™ , SPI, PDM, or alarms. 2 The I C™ interface can be used for a simple PCcontrolled calibration procedure to program a set of calibration coefficients into an on-chip EEPROM. The calibrated ZSSC3122 and a specific sensor are mated digitally: fast, precise, and without the cost overhead of trimming by external devices or laser. Maximum target input capacitance: 10pF Sampling rates as fast as 0.7ms at 8-bit resolution; 1.6ms at 10-bit; 5.0ms at 12-bit; 18.5ms at14-bit st Digital compensation of sensor: piece-wise 1 nd and 2 order sensor compensation or up to rd 3 order single-region 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@ -20 to 125°C, 3V, 5V, Vsupply ±10% Interfaces I²C™ or SPI interface—easy connection to a microcontroller PDM outputs (Filtered Analog Ratiometric) for both capacitance and temperature Up to two alarms that can act as full push-pull or open-drain switches Physical Characteristics Features Minimized calibration costs: no laser trimming, one-pass calibration using a digital interface Excellent for low-power battery applications Supply voltage: 1.8 to 5.5V Typical current consumption 650μA down to 60μA depending on configuration Typical Sleep Mode current: ≤ 1μA at 85°C Operation temperature: –20°C to +125°C Die or TSSOP14 package Available Support ZSSC3122 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 ZSSC3122 (+1.8V to 5.5V) 0.1µF 0.1µF Ready VSS GND SDA/MISO SCL/SCLK C0 SS Alarm_High CC * † Alarm_Low I2C™ is a registered trademark of NXP. See data sheet section 1.3 for restrictions. For more information, contact ZMDI via [email protected]. © 2014 Zentrum Mikroelektronik Dresden AG — Rev. 1.62 — August 28, 2014. 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. ZSSC3122 cLite™ Low Voltage Capacitive Sensor Signal Conditioner ZSSC3122 cLite™ Low Voltage Capacitive Sensor Signal Conditioner VDD (1.8V to 5.5V) ZSSC3122 Temp Sensor Vcore Ref Cap Offset Cap EEPROM 0.1µF Block Diagram CLK/Reset Ready SCL/SCLK SDA/MISO PDM 0.1µF Sensor C/A C0 C0 CC C1 C1 D MUX Analog Core 0.1µF 0.1µF PDM_C Output Communication Digital Core SUPPLY (+1.8V to 5.5V) VSUPPLY PDM_T C0 0.1µF Cap. Analog Output 0.1µF cLite™ Vcore ZSSC3122 Ready GND Temp Analog Output VSS SDA/MISO C0 SCL/SCLK SS CC LED CC VDD (+1.8V to 5.5V) VSS GND Alarm_High Application: Differential Capacitance Input V ZSSC3122 SS ROM Application: Analog Output Vcore Low Alarm High Alarm VSS cLite™ Alarm_Low/PDM_T DSP CDC (Optional) VDD Ready/PDM_C I2C / SPI Alarm_High C1 Alarm_High Alarm_Low Ordering Codes Sales Code Description Package ZSSC3122AA1BN ZSSC3122 Die — Temperature range: -20°C to +125°C Tested dice on un-sawn wafer, 370µm ZSSC3122AI1BN ZSSC3122 Die — Temperature range: -20°C to +85°C Tested dice on un-sawn wafer, 370µm ZSSC3122AI3BN ZSSC3122 Die — Temperature range: -20°C to +85°C Tested dice on un-sawn wafer, 725µm ZSSC3122AA3BN ZSSC3122 Die — Temperature range: -20°C to +125°C Tested dice on un-sawn wafer, 725µm ZSSC3122AA1CN ZSSC3122 Die — Temperature range: -20°C to +125°C Tested dice on frame, 370µm ZSSC3122AI1CN ZSSC3122 Die — Temperature range: -20°C to +85°C Tested dice on frame, 370µm ZSSC3122AA2*N ZSSC3122 TSSOP14 — Temperature range: -20°C to +125°C – Lead-free package Tube: substitute “T” for * in code Reel: substitute “R” for * in code ZSSC3122AI2*N ZSSC3122 TSSOP14 — Temperature range: -20°C to +85°C – Lead-free package Tube: substitute “T” for * in code Reel: substitute “R” for * in code ZSSC3122KIT ZSSC3122 SSC Evaluation Kit: Communication Board, SSC Board, Sensor Replacement Kit Board, USB Cable, 5 IC Samples (software can be downloaded from www.zmdi.com/zssc3122) Sales and Further Information www.zmdi.com [email protected] Zentrum Mikroelektronik Dresden AG Global Headquarters Grenzstrasse 28 01109 Dresden, Germany ZMD America, Inc. 1525 McCarthy Blvd., #212 Milpitas, CA 95035-7453 USA Central Office: Phone +49.351.8822.306 Fax +49.351.8822.337 USA Phone 1.855.275.9634 Phone +1.408.883.6310 Fax +1.408.883.6358 European Technical Support Phone +49.351.8822.7.772 Fax +49.351.8822.87.772 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. European Sales (Stuttgart) Phone +49.711.674517.55 Fax +49.711.674517.87955 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 +81.3.6895.7410 Fax +81.3.6895.7301 Phone +886.2.2377.8189 Fax +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 © 2014 Zentrum Mikroelektronik Dresden AG — Rev. 1.62 — August 28, 2014 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.