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Renesas ZSSC3123AI6B
- Part No.:
- ZSSC3123AI6B
- Manufacturer:
- Renesas
- Category:
- Sensor and Detector Interfaces
- Package:
- Die
- Datasheet:
-
ZSSC3123AI6B.pdf
- Description:
- WAFER (UNSAWN) - BOX
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Product details
Overview
ZSSC3123AI6B from Renesas Electronics is a CMOS capacitive sensor signal conditioner IC that performs high-accuracy capacitance-to-digital conversion and digital correction of 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 for industrial pressure and level sensing systems.
For engineers reviewing the ZSSC3123AI6B datasheet, ZSSC3123AI6B pinout, ZSSC3123AI6B application, or ZSSC3123AI6B equivalent, key selection considerations include its 14-TSSOP package, programmable resolution (8–14 bit), ±0.25% FSO accuracy over temperature, dual alarm outputs, and support for die-bonded chip-on-board assembly with minimal external components.
Technical Context
The ZSSC3123AI6B integrates a capacitance-to-digital converter (CDC) with configurable multiplier settings (Mult1–Mult8) enabling full-scale input ranges from 2 pF to 260 pF, and a dedicated temperature sensor with 1st/2nd-order digital compensation. Its digital signal processor executes piecewise linear or 3rd-order single-region sensor correction algorithms.
It features dual output modes: digital (I²C/SPI) for microcontroller interfacing and pulse density modulation (PDM) for ratiometric analog-like signals. Alarm outputs are independently configurable as push-pull or open-drain, with polarity and threshold registers stored in EEPROM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.3 V to 5.5 V - enables direct interface with 3.3 V and 5 V microcontrollers without level-shifting. |
| Input Capacitance Range | Up to 260 pF - supports wide variety of MEMS and PCB-based capacitive sensors including differential configurations. |
| Resolution & Speed | 8-bit @ 0.7 ms, 14-bit @ 18.5 ms - selectable trade-off between update rate and measurement precision per application need. |
| Accuracy | ±0.25% FSO at –40°C to +125°C, VSUPPLY ±10% - specified under real-world operating conditions, not typical-only. |
| Current Consumption | 750 μA typical active; ≤1 μA sleep at 85°C - suitable for battery-powered industrial IoT nodes with long standby intervals. |
| Temperature Compensation | Digital 1st/2nd-order gain and offset drift correction - eliminates need for external thermistors or analog compensation circuitry. |
| Output Interfaces | I²C, SPI, PDM (capacitance & temperature), two independent alarms - provides flexibility for system-level integration and fail-safe monitoring. |
Pinout & Package
Package: 4.4 mm × 5.0 mm 14-pin TSSOP (lead-free, RoHS-compliant). Pinout validated per Renesas ZSSC3123 Datasheet Rev. Nov 19, 2021, Pages 7–8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary supply rail (2.3–5.5 V); decoupled via 0.1 μF capacitor to VSS. |
| VSS | Ground reference | System ground return for analog and digital sections; must be low-impedance. |
| C0 / C1 | Capacitive sensor inputs | C0 = main sensor terminal; C1 = optional second terminal for differential mode or reference. |
| CC | Reference capacitor connection | Connects external reference capacitor (typically 10–100 pF) for CDC ratio-metric stability. |
| SCL/SCLK | Clock input | I²C clock (SCL) or SPI clock (SCLK); shared pin with mode auto-detected on power-up. |
| SDA/MISO | Data bidirectional | I²C data (SDA) or SPI master-in/slave-out (MISO); direction controlled by interface protocol. |
| SS | SPI slave select | Active-low enable for SPI communication; high-impedance when unused in I²C mode. |
| Alarm_High / Alarm_Low | Dual alarm outputs | Configurable push-pull or open-drain outputs; each independently assigned high/low threshold limits. |
| Ready/PDM_C | Status or PDM output | Indicates measurement completion (Ready) or outputs capacitance PDM stream (PDM_C). |
| PDM_T | Temperature PDM output | Dedicated pulse-density modulated output for compensated temperature value. |
| Vcore | Internal core voltage | Internally regulated ~1.2 V; no external connection required. |
| NC | No connect | Pin 13 is unconnected; must remain floating or tied to VSS per layout guidelines. |
| NC | No connect | Pin 14 is unconnected; must remain floating or tied to VSS per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Digital sensor compensation | On-chip DSP applies piecewise 1st/2nd-order or 3rd-order single-region correction using EEPROM-stored coefficients - eliminates post-assembly trimming. |
| Integrated temperature reference | On-die temperature sensor with digital 1st/2nd-order gain and offset drift compensation - no external thermistor or calibration points needed. |
| Chip-on-board optimization | Layout designed for direct die-to-die bonding with capacitive sensor elements - reduces parasitic capacitance and enables ultra-compact, low-cost module assembly. |
| Low-power operation | ≤1 μA sleep current at 85°C with wake-on-alarm capability - extends battery life in wireless sensor nodes without sacrificing responsiveness. |
| Multi-interface output | Simultaneous I²C, SPI, and dual PDM outputs - allows concurrent digital readout and analog-ratiometric feedback to MCU ADC or external filters. |
Applications
| Industrial Pressure Sensing | Automotive HVAC Humidity Monitoring |
|---|---|
Use Scenario: MEMS capacitive pressure transducer in hydraulic control units requiring stable output over wide temperature range and vibration. IC Role / Device Role / Timing Role: Primary signal conditioner performing real-time capacitance-to-digital conversion, temperature compensation, and alarm-triggered fault reporting. Use Value: ±0.25% FSO accuracy at –40°C to +125°C ensures reliable pressure feedback without recalibration across vehicle lifetime. | Use Scenario: Capacitive humidity sensor in automotive cabin air management systems with strict EMC and low-power constraints. IC Role / Device Role / Timing Role: Sensor interface IC delivering ratiometric PDM outputs compatible with existing MCU ADC inputs and supporting wake-on-humidity-threshold events. Use Value: 750 μA active / ≤1 μA sleep current enables continuous monitoring while meeting OEM battery drain budgets. |
| Medical Disposable Flow Sensors | Smart Industrial Valve Position Feedback |
Use Scenario: Single-use capacitive flow sensor in infusion pumps where calibration must be performed once during manufacturing and retained indefinitely. IC Role / Device Role / Timing Role: Calibration-mated signal conditioner storing sensor-specific coefficients in on-chip EEPROM for lifetime traceability and zero-field recalibration. Use Value: Digital mating eliminates laser trimming cost and enables one-pass calibration via I²C - reducing BOM and assembly time. | Use Scenario: Position-sensing capacitive encoder integrated into smart pneumatic valve actuators requiring dual alarm outputs for limit detection. IC Role / Device Role / Timing Role: Dual-alarm interface IC generating independent push-pull signals for mechanical end-stop detection and thermal over-limit shutdown. Use Value: Two fully configurable alarm outputs eliminate need for external comparators or GPIO expansion in space-constrained valve modules. |
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 correction and PDM outputs. | Targeted at motion + capacitance fusion; not optimized for high-accuracy standalone capacitive sensing with factory calibration retention. | Select ZSSC3123AI6B when sensor-specific digital correction, long-term coefficient storage, and analog-ratiometric PDM are required. |
| Analog Devices AD7745 | 24-bit CDC with 12-bit temperature sensor; no on-chip DSP for multi-order sensor/temperature compensation or alarm logic. | Requires external MCU for full compensation math and alarm handling; higher system-level design effort. | Select ZSSC3123AI6B when integrated correction algorithm, EEPROM storage, and autonomous alarm generation reduce firmware overhead. |
Compared with ICM-42688-P and AD7745, the ZSSC3123AI6B delivers turnkey capacitive signal conditioning with factory-programmable correction, autonomous dual alarms, and PDM outputs - reducing system integration complexity and eliminating post-assembly trimming.
Availability
ZSSC3123AI6B is available at Aetrix Electronics and suitable for industrial pressure sensing, automotive HVAC monitoring, medical disposable flow sensors, and smart valve position feedback requiring stable component supply, long-lifecycle support, and calibrated performance out-of-box.
Supply support for ZSSC3123AI6B 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, with deep expertise in mixed-signal and sensor interface ICs.
The ZSSC3123AI6B belongs to Renesas' cLite™ family of capacitive signal conditioners, engineered specifically for high-accuracy, low-power, factory-calibrated capacitive sensing in harsh environments - targeting MEMS, industrial, and automotive sensor modules.
FAQ
What is the primary function of the ZSSC3123AI6B in a capacitive sensing system?
The ZSSC3123AI6B serves as a complete capacitive sensor signal conditioner, performing capacitance-to-digital conversion, digital compensation of sensor offset/sensitivity/temperature drift using on-chip EEPROM-stored coefficients, and delivering calibrated outputs via I²C, SPI, or PDM. It eliminates external trimming and enables digital mating between sensor and IC - a core capability of the ZSSC3123AI6B.
Does the ZSSC3123AI6B support differential capacitive sensors?
Yes, the ZSSC3123AI6B supports both single-ended and differential capacitive sensor configurations. The C0 and C1 pins allow connection of differential sensor topologies, and the internal capacitance-to-digital converter (CDC) processes the difference signal with configurable gain and resolution - a confirmed feature of the ZSSC3123AI6B per its datasheet section 14.4.
What is the maximum input capacitance the ZSSC3123AI6B can handle?
The ZSSC3123AI6B supports input capacitances up to 260 pF, achieved using the Mult8 configuration setting. This is explicitly specified in the datasheet's Features section and Table 9 (Mult8: Sensor Capacitors Ranging from 130pF to 260pF), confirming the upper limit for the ZSSC3123AI6B.
How does the ZSSC3123AI6B achieve temperature compensation without external components?
The ZSSC3123AI6B integrates an on-die temperature sensor and applies digital 1st- and 2nd-order gain and offset drift compensation using coefficients stored in EEPROM. No external thermistor, resistor network, or analog compensation circuitry is required - a documented capability of the ZSSC3123AI6B verified in datasheet sections 9.2.2 and 13.2.
Can the ZSSC3123AI6B operate in ultra-low-power modes for battery-powered devices?
Yes, the ZSSC3123AI6B supports a sleep mode with typical current consumption ≤1 μA at 85°C and wake-on-alarm capability. This enables multi-year operation in battery-powered industrial and medical sensors - a key specification confirmed in datasheet section 6.2 and Figure 4 for the ZSSC3123AI6B.
ZSSC3123AI6B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- Die
- Series:
- cLite™
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Type:
- Capacitive Sensor
- Input Type:
- Capacitive
- Output Type:
- I2C, SPI
- Current - Supply:
- 1.1 mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
ZSSC3123AI6B FAQ
1.How can I place an order for ZSSC3123AI6B through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSSC3123AI6B 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 ZSSC3123AI6B reliable?
The price and inventory of ZSSC3123AI6B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSSC3123AI6B is usually 5 days.
3.What payment methods are accepted for ZSSC3123AI6B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSSC3123AI6B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSSC3123AI6B?
ZSSC3123AI6B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSSC3123AI6B 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 ZSSC3123AI6B?
For technical support, including ZSSC3123AI6B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSSC3123AI6B requirements.
6.How does Aetrix verify that ZSSC3123AI6B is sourced from the original manufacturer or authorized distributors?
All ZSSC3123AI6B 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 ZSSC3123AI6B meets industry standards.
7.What is the process for return or replacement of ZSSC3123AI6B?
All ZSSC3123AI6B units undergo pre-shipment inspection (PSI). If there is an issue with ZSSC3123AI6B, 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 ZSSC3123AI6B part is unused and in its original packaging.
Return procedure for ZSSC3123AI6B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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