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Renesas ZSSC3123AA2R
- Part No.:
- ZSSC3123AA2R
- Manufacturer:
- Renesas
- Category:
- Specialized
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- Datasheet:
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ZSSC3123AA2R.pdf
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- IC INTFACE SPECIALIZED SGNL COND
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Product details
Overview
ZSSC3123AA2R from Renesas Electronics is a CMOS capacitive sensor signal conditioner IC performing capacitance-to-digital conversion with digital compensation for offset, sensitivity, and temperature drift using on-chip EEPROM-stored calibration coefficients. It supports single or differential capacitive sensors up to 260 pF, offers I²C/SPI/PDM outputs, and operates from 2.3 V to 5.5 V across –40°C to +125°C - used in industrial pressure and level sensing systems requiring high-accuracy ratiometric analog or digital output.
For engineers reviewing the ZSSC3123AA2R datasheet, ZSSC3123AA2R pinout, ZSSC3123AA2R application, or ZSSC3123AA2R equivalent, key selection considerations include its 14-TSSOP package, programmable resolution (8–14 bit), dual alarm outputs, internal temperature reference, and support for die-bonded chip-on-board assembly with minimal external components.
Technical Context
The ZSSC3123AA2R integrates a capacitance-to-digital converter (CDC) with configurable multiplier settings (Mult1–Mult8) enabling full-scale input ranges from 2 pF to 260 pF. Its digital signal processor executes piecewise 1st/2nd-order or single-region 3rd-order sensor compensation algorithms, plus 1st/2nd-order temperature gain and offset correction.
It features dual independent alarm outputs (Alarm_High/Alarm_Low) configurable as push-pull or open-drain, PDM outputs for ratiometric capacitance (PDM_C) and temperature (PDM_T), and supports both update mode (750 µA typical) and ultra-low-power sleep mode (≤1 µA at 85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.3 V to 5.5 V - enables direct interface with common microcontrollers and battery-powered systems without LDO overhead. |
| Input Capacitance Range | Up to 260 pF - supports wide variety of MEMS and printed capacitive sensors including differential configurations. |
| Resolution & Conversion Time | 8-bit @ 0.7 ms, 10-bit @ 1.6 ms, 12-bit @ 5.0 ms, 14-bit @ 18.5 ms - trade-off between speed and precision selectable per application timing budget. |
| Accuracy | ±0.25% FSO over –40°C to +125°C at 3 V/5 V, VSUPPLY ±10% - specified under defined calibration and operating conditions per datasheet Section 5. |
| Temperature Compensation | Digital 1st/2nd-order gain and offset drift correction using on-chip temperature sensor - eliminates need for external thermal reference or compensation circuitry. |
| Interface Options | I²C, SPI, and Pulse Density Modulation (PDM) - provides flexibility for MCU integration (I²C/SPI) or direct analog-ratiometric filtering (PDM_C/PDM_T). |
| Alarm Outputs | Two independent outputs (Alarm_High/Alarm_Low), configurable as push-pull or open-drain - enables direct control of external switches or logic without additional drivers. |
Pinout & Package
Package: 4.4 mm × 5.0 mm 14-pin TSSOP (RoHS-compliant, lead-free). Pinout validated per Renesas ZSSC3123 Datasheet Rev. Nov 19, 2021, Pages 7–8 (Fig. 1, Table 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary supply rail (2.3–5.5 V); decoupled with 0.1 µF capacitor to VSS. |
| VSS | Ground reference | Analog/digital ground return; must be low-impedance connection to system GND plane. |
| C0 | Capacitive sensor input | Single-ended or differential high-side sensor terminal; connects directly to sensor electrode. |
| CC | Reference capacitor input | Connects to external reference capacitor (optional); used for CDC ratio measurement and noise rejection. |
| C1 | Differential sensor input | Low-side terminal for differential capacitive sensors; required only in differential mode. |
| SCL/SCLK | Clock input | I²C clock (SCL) or SPI clock (SCLK); shared pin with mode-dependent function. |
| SDA/MISO | Data I/O | I²C bidirectional data (SDA) or SPI master-in/slave-out (MISO); mode selected via configuration. |
| SS | SPI slave select | Active-low chip select for SPI communication; high-impedance when not asserted. |
| Ready/PDM_C | Status or PDM output | Indicates measurement completion (Ready) or outputs ratiometric capacitance data (PDM_C). |
| Alarm_High | Programmable alarm output | Push-pull or open-drain output asserting when measured capacitance exceeds high threshold. |
| Alarm_Low | Programmable alarm output | Push-pull or open-drain output asserting when measured capacitance falls below low threshold. |
| Vcore | Internal core regulator output | Provides regulated voltage for internal analog blocks; requires 0.1 µF decoupling to VSS. |
| Temp | Temperature sensor output | Not user-accessible; internal die temperature reading used exclusively for digital compensation. |
| CLK/Reset | Optional clock or reset | Accepts external clock for synchronous operation or serves as hardware reset input (active-low). |
Key Features
| Feature | Design Value |
|---|---|
| Digital sensor compensation | Configurable piecewise 1st/2nd-order or single-region 3rd-order algorithm - corrects nonlinearity and hysteresis without external lookup tables. |
| Integrated temperature reference | On-die temperature sensor with no external components required - enables accurate thermal drift correction across full operating range. |
| Chip-on-board layout optimization | Pinout and die orientation designed for direct die-die bonding with capacitive sensor elements - reduces parasitic capacitance and assembly cost. |
| Ultra-low sleep current | ≤1 µA at 85°C - extends battery life in intermittent-read applications such as wireless sensor nodes. |
| One-pass digital calibration | I²C-based programming of EEPROM coefficients - eliminates laser trimming, reduces calibration time and test fixture complexity. |
Applications
| Industrial Pressure Sensing | Automotive HVAC Control |
|---|---|
Use Scenario: MEMS-based pressure transducer in industrial process monitoring, measuring 0–100 kPa with ±0.25% FSO accuracy requirement. IC Role / Device Role / Timing Role: Primary signal conditioner converting differential capacitance shift into calibrated digital output via I²C, with real-time temperature compensation. Use Value: Eliminates analog front-end op-amps and external ADC, reducing BOM count and board space while maintaining traceable calibration across temperature. | Use Scenario: Cabin air flap position feedback in automotive HVAC systems using printed capacitive sensors on flexible PCBs. IC Role / Device Role / Timing Role: Single-ended capacitance measurement with PDM_C output filtered to analog voltage for MCU ADC input. Use Value: Enables robust, EMI-resistant position sensing without mechanical potentiometers or Hall-effect components. |
| Medical Fluid Level Monitoring | Consumer Appliance Touch Interface |
Use Scenario: Non-invasive liquid level detection in dialysis machines using coaxial capacitive probes immersed in conductive fluid. IC Role / Device Role / Timing Role: Differential capacitance measurement with alarm outputs triggering pump shutdown when level exceeds thresholds. Use Value: Dual alarms provide fail-safe level control without software polling, meeting IEC 62304 safety requirements. | Use Scenario: Waterproof touch slider on washing machine control panel using segmented capacitive electrodes. IC Role / Device Role / Timing Role: High-speed 8-bit update mode (0.7 ms) for responsive touch detection, with SPI interface for low-latency MCU communication. Use Value: Supports fast scan rates and dynamic range adaptation to varying finger coupling, improving usability in wet environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive sensor signal conditioning applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDK InvenSense ICM-42688-P | Combines 6-axis IMU with integrated capacitive sensing frontend; lacks dedicated EEPROM-based multi-order sensor compensation. | Targeted at motion + proximity fusion; not optimized for high-accuracy static capacitance measurement or industrial calibration workflows. | Select ZSSC3123AA2R for standalone, high-precision capacitive sensing with factory-trimmed calibration; choose ICM-42688-P only if motion sensing is co-required. |
| Analog Devices AD7745 | 24-bit CDC with fixed 1st-order temperature compensation; no on-chip DSP for piecewise or 3rd-order sensor correction. | Requires external microcontroller for advanced compensation algorithms and EEPROM management. | ZSSC3123AA2R reduces firmware development effort and improves thermal stability in harsh environments where AD7745 would require custom compensation code. |
Compared with AD7745 and ICM-42688-P, the ZSSC3123AA2R delivers higher system-level accuracy out-of-box via embedded correction algorithms and factory-programmable EEPROM, minimizing host MCU processing load and calibration validation effort.
Availability
ZSSC3123AA2R is available at Aetrix Electronics and suitable for industrial pressure sensing, automotive HVAC control, medical fluid level monitoring, and consumer appliance touch interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant 14-TSSOP packaging.
Supply support for ZSSC3123AA2R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, infrastructure, and IoT applications.
The ZSSC3123AA2R belongs to Renesas' cLite™ family of capacitive signal conditioners, engineered specifically for high-accuracy, low-power, and calibration-efficient interfacing with MEMS and printed capacitive sensors in harsh-environment industrial and automotive systems.
FAQ
What is the maximum sensor capacitance supported by the ZSSC3123AA2R?
The ZSSC3123AA2R supports capacitive sensors up to 260 pF, achieved using the Mult8 configuration setting. This allows full-scale measurement of large-area or high-sensitivity capacitive elements commonly found in industrial pressure and level sensors. The device automatically scales resolution and conversion time based on selected multiplier mode, ensuring optimal SNR across the entire range.
Does the ZSSC3123AA2R require external components for temperature compensation?
No, the ZSSC3123AA2R includes an on-die temperature sensor and performs full digital 1st- and 2nd-order temperature gain and offset compensation internally. No external thermistors, RTDs, or reference components are needed - simplifying design, reducing BOM cost, and improving long-term stability in applications like automotive HVAC and industrial process control where ambient temperature varies widely.
Can the ZSSC3123AA2R operate in ultra-low-power modes for battery-powered devices?
Yes, the ZSSC3123AA2R supports a dedicated Sleep Mode with typical current consumption ≤1 µA at 85°C. In this mode, it maintains alarm functionality and retains EEPROM configuration, allowing wake-up on threshold violation without host MCU intervention - ideal for wireless sensor nodes and portable medical devices where battery life is critical.
How is calibration performed for the ZSSC3123AA2R?
Calibration of the ZSSC3123AA2R is performed digitally via I²C using the included SSC Evaluation Kit. A PC-based tool programs sensor-specific offset, sensitivity, and temperature drift coefficients into on-chip EEPROM in a single pass - eliminating laser trimming, external DACs, or manual potentiometer adjustments. This ensures repeatable, traceable calibration across production batches.
What output formats does the ZSSC3123AA2R support?
The ZSSC3123AA2R supports four native output formats: I²C, SPI, Pulse Density Modulation (PDM) for ratiometric capacitance (PDM_C) and temperature (PDM_T), and two programmable alarm signals (Alarm_High/Alarm_Low). PDM outputs can be low-pass filtered externally to generate analog voltages, enabling compatibility with legacy MCU ADC inputs without adding a separate DAC.
ZSSC3123AA2R Specifications
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ZSSC3123AA2R FAQ
1.How can I place an order for ZSSC3123AA2R through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSSC3123AA2R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ZSSC3123AA2R reliable?
The price and inventory of ZSSC3123AA2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSSC3123AA2R is usually 5 days.
3.What payment methods are accepted for ZSSC3123AA2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSSC3123AA2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSSC3123AA2R?
ZSSC3123AA2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSSC3123AA2R order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ZSSC3123AA2R?
For technical support, including ZSSC3123AA2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSSC3123AA2R requirements.
6.How does Aetrix verify that ZSSC3123AA2R is sourced from the original manufacturer or authorized distributors?
All ZSSC3123AA2R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZSSC3123AA2R meets industry standards.
7.What is the process for return or replacement of ZSSC3123AA2R?
All ZSSC3123AA2R units undergo pre-shipment inspection (PSI). If there is an issue with ZSSC3123AA2R, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ZSSC3123AA2R part is unused and in its original packaging.
Return procedure for ZSSC3123AA2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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