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Renesas ZSSC3123AI2R
- Part No.:
- ZSSC3123AI2R
- Manufacturer:
- Renesas
- Category:
- Specialized
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- -
- Datasheet:
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ZSSC3123AI2R.pdf
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- IC INTFACE SPECIALIZED SGNL COND
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Product details
Overview
ZSSC3123AI2R 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 ZSSC3123AI2R datasheet, ZSSC3123AI2R pinout, ZSSC3123AI2R application, or ZSSC3123AI2R 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 ZSSC3123AI2R integrates a capacitance-to-digital converter (CDC) with configurable gain multipliers (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 and 1st/2nd-order temperature gain/offset correction.
It features dual output modes: digital (I²C/SPI) for calibrated data reads and pulse density modulation (PDM) for ratiometric analog-like outputs of capacitance and temperature. Alarm outputs are independently configurable as push-pull or open-drain with user-defined thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Capacitance Range | Up to 260 pF - supports wide variety of MEMS and printed capacitive sensors without external scaling. |
| Resolution & Conversion Time | 8-bit @ 0.7 ms; 14-bit @ 18.5 ms - enables trade-off between speed and precision per system timing budget. |
| Accuracy | ±0.25% FSO over –40°C to +125°C at 3 V/5 V, VSUPPLY ±10% - meets high-reliability industrial sensor requirements. |
| Supply Voltage | 2.3 V to 5.5 V - compatible with battery-powered and industrial rail voltages. |
| Current Consumption | 750 μA typical active; ≤1 μA sleep at 85°C - enables ultra-low-power wake-on-event operation. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and harsh industrial environments. |
| Output Interfaces | I²C, SPI, PDM (capacitance & temperature), two independent alarms - provides flexible host integration and analog-compatible signal delivery. |
Pinout & Package
Package: 4.4 mm × 5.0 mm 14-pin TSSOP (lead-free, RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core supply input | 2.3–5.5 V main power rail; requires 0.1 μF decoupling to VSS. |
| VSS | Ground reference | Analog/digital common return; must be low-impedance and separated from noisy digital ground if possible. |
| C0 / C1 | Differential capacitive inputs | Accepts single-ended (C0 only) or differential (C0/C1) sensor configurations; CC is common-mode reference. |
| CC | Common-mode reference | Provides stable bias point for differential sensing; connects to sensor shield or guard trace. |
| SCL/SCLK | Clock input | I²C clock (SCL) or SPI clock (SCLK); shared pin auto-detected by startup configuration. |
| SDA/MISO | Data bidirectional | I²C data (SDA) or SPI master-in/slave-out (MISO); mode selected via EEPROM configuration. |
| SS | SPI slave select | Active-low enable for SPI communication; high-Z when not selected. |
| Alarm_High / Alarm_Low | Programmable alarm outputs | Configurable as push-pull or open-drain; drive external LEDs, relays, or MCU interrupt lines. |
| Ready / PDM_C | Status or PDM output | Indicates measurement completion (Ready) or delivers capacitance PDM stream (PDM_C). |
| PDM_T | Temperature PDM output | Delivers ratiometric temperature PDM stream synchronized with PDM_C. |
| Vcore | Internal core regulator output | Not externally connected; supplies regulated voltage to internal analog blocks. |
| NC | No connect | Pin 13 is unconnected; must be left floating or tied to VSS per layout guidelines. |
| NC | No connect | Pin 14 is unconnected; must be left floating or tied to VSS per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Digital sensor compensation | On-the-fly 1st/2nd-order piecewise or 3rd-order single-region correction eliminates need for analog trimming components. |
| Integrated temperature reference | On-die thermal sensor with no external components required for full temperature drift compensation. |
| Multi-interface output flexibility | I²C/SPI for digital host control plus PDM for analog-ratiometric output - avoids ADC requirement in host MCU. |
| Ultra-low sleep current | ≤1 μA at 85°C enables years of battery life in intermittent-sensing applications like IoT environmental monitors. |
| Dual independent alarms | Two fully configurable alarm outputs support fail-safe monitoring (e.g., over-pressure + under-temperature). |
Applications
| Industrial Pressure Sensing | Automotive HVAC Control |
|---|---|
Use Scenario: MEMS-based pressure transducer in hydraulic or pneumatic systems measuring 0–100 bar with temperature compensation. IC Role / Device Role / Timing Role: Primary signal conditioner converting differential capacitance shift into calibrated digital output with real-time temperature correction. Use Value: Achieves ±0.25% FSO accuracy over –40°C to +125°C without external temperature sensors or laser trimming. | Use Scenario: Cabin air quality and temperature control using capacitive humidity and temperature sensors. IC Role / Device Role / Timing Role: Dual-sensor interface providing simultaneous PDM outputs for capacitance (humidity) and temperature - enabling synchronous ratiometric readout. Use Value: Eliminates need for separate ADC channels and reduces host MCU firmware complexity via self-timed PDM streams. |
| Medical Disposable Flow Sensors | Smart Industrial Level Gauges |
Use Scenario: Single-use fluid flow meter with printed capacitive sensor detecting diaphragm deflection in IV pumps. IC Role / Device Role / Timing Role: Low-power signal conditioner operating in burst mode with <1 μA sleep current between measurements. Use Value: Extends battery life beyond 2 years in portable medical devices while maintaining calibration integrity via on-chip EEPROM. | Use Scenario: Tank level monitoring in chemical processing using large-area parallel-plate capacitive probes. IC Role / Device Role / Timing Role: High-input-capacitance conditioner supporting up to 260 pF sensor elements with programmable span/offset. Use Value: Enables direct interface to custom high-C sensors without external charge amplifiers or scaling networks. |
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 interface; lacks dedicated EEPROM-based sensor-specific calibration math. | Targeted at motion + proximity fusion; not optimized for high-accuracy static capacitance measurement. | Choose ZSSC3123AI2R for standalone, high-precision capacitive sensing; choose ICM-42688-P only when motion sensing is co-required. |
| Analog Devices AD7745 | 24-bit CDC with lower max input capacitance (17 pF), no built-in temperature compensation algorithm or EEPROM storage. | Requires external microcontroller for calibration math and temperature compensation logic. | Choose ZSSC3123AI2R when full turnkey compensation and alarm outputs are needed; AD7745 suits designs with existing host processing capability. |
Compared with ICM-42688-P and AD7745, the ZSSC3123AI2R uniquely integrates sensor-specific correction algorithms, non-volatile coefficient storage, and dual alarm outputs in a single 14-TSSOP package - reducing BOM count and firmware development effort for dedicated capacitive sensing nodes.
Availability
ZSSC3123AI2R is available at Aetrix Electronics and suitable for industrial pressure sensing, automotive HVAC control, medical disposable flow sensors, and smart industrial level gauges requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ZSSC3123AI2R 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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.
The ZSSC3123AI2R belongs to Renesas' cLite™ family of highly integrated capacitive signal conditioners, designed specifically for cost-sensitive, high-volume capacitive sensing applications requiring factory-calibrated accuracy and minimal external components.
FAQ
What is the primary function of the ZSSC3123AI2R?
The ZSSC3123AI2R is a dedicated capacitive sensor signal conditioner IC that performs high-accuracy capacitance-to-digital conversion and applies digital compensation for sensor offset, sensitivity, and temperature drift. It stores calibration coefficients in on-chip EEPROM and supports single or differential capacitive sensors up to 260 pF. The ZSSC3123AI2R delivers calibrated output via I²C, SPI, or PDM - eliminating need for external trimming or host-based compensation math.
Does the ZSSC3123AI2R require external temperature sensing components?
No, the ZSSC3123AI2R includes an integrated temperature sensor and internal temperature compensation reference. It performs 1st- and 2nd-order temperature gain and offset drift correction digitally using coefficients stored in EEPROM - requiring no external thermistors, RTDs, or temperature ICs. This simplifies design and improves long-term stability for the ZSSC3123AI2R in applications such as industrial pressure transducers.
What are the supported output interfaces for the ZSSC3123AI2R?
The ZSSC3123AI2R supports four output modalities: I²C, SPI, Pulse Density Modulation (PDM) for capacitance, and PDM for temperature. Alarm outputs (Alarm_High and Alarm_Low) provide additional digital status signals. Interface selection is configured via EEPROM settings - allowing the same ZSSC3123AI2R hardware to serve diverse host architectures without PCB changes.
How does the ZSSC3123AI2R handle calibration and coefficient storage?
The ZSSC3123AI2R stores sensor-specific calibration coefficients in on-chip non-volatile EEPROM. These coefficients are programmed during factory calibration using the I²C interface, enabling digital mating of the ZSSC3123AI2R with a specific sensor. No laser trimming or external calibration hardware is required - reducing manufacturing cost and enabling one-pass calibration. The ZSSC3123AI2R retains coefficients across power cycles and temperature extremes.
What is the significance of the "AI2R" suffix in ZSSC3123AI2R?
The "AI2R" suffix in ZSSC3123AI2R denotes the specific ordering variant: "A" indicates automotive-grade qualification (AEC-Q100 stress-tested), "I2" specifies the 14-pin TSSOP package with lead finish and moisture sensitivity level compliant for industrial use, and "R" signifies tape-and-reel packaging. This distinguishes it from other variants like ZSSC3123ET1R (die form) or ZSSC3123AI1R (different pinout or test grade). The ZSSC3123AI2R is optimized for surface-mount assembly in high-reliability applications.
ZSSC3123AI2R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Interface:
- -
- Voltage - Supply:
- -
- Supplier Device Package:
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ZSSC3123AI2R FAQ
1.How can I place an order for ZSSC3123AI2R through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSSC3123AI2R 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 ZSSC3123AI2R reliable?
The price and inventory of ZSSC3123AI2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSSC3123AI2R is usually 5 days.
3.What payment methods are accepted for ZSSC3123AI2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSSC3123AI2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSSC3123AI2R?
ZSSC3123AI2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSSC3123AI2R 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 ZSSC3123AI2R?
For technical support, including ZSSC3123AI2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSSC3123AI2R requirements.
6.How does Aetrix verify that ZSSC3123AI2R is sourced from the original manufacturer or authorized distributors?
All ZSSC3123AI2R 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 ZSSC3123AI2R meets industry standards.
7.What is the process for return or replacement of ZSSC3123AI2R?
All ZSSC3123AI2R units undergo pre-shipment inspection (PSI). If there is an issue with ZSSC3123AI2R, 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 ZSSC3123AI2R part is unused and in its original packaging.
Return procedure for ZSSC3123AI2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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