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Renesas ZSSC3123AI2T
- Part No.:
- ZSSC3123AI2T
- Manufacturer:
- Renesas
- Category:
- Specialized
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ZSSC3123AI2T.pdf
- Description:
- IC INTFACE SPECIALIZED SGNL COND
- Quantity:
- Payment:
- Shipping:
Inventory:1,009
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Product details
Overview
ZSSC3123AI2T from Renesas Electronics is a CMOS capacitive sensor signal conditioner IC performing capacitance-to-digital conversion with on-chip digital compensation for offset, sensitivity, and temperature drift. It supports sensor capacitances up to 260 pF, offers 8–14-bit resolution (conversion times from 0.7 ms to 18.5 ms), operates from 2.3 V to 5.5 V, and delivers ±0.25% FSO accuracy across –40°C to +125°C - used in industrial pressure, level, and proximity sensing systems.
For engineers reviewing the ZSSC3123AI2T datasheet, ZSSC3123AI2T pinout, ZSSC3123AI2T application, or ZSSC3123AI2T equivalent, key selection criteria include its configurable I²C/SPI/PDM output modes, dual alarm outputs with push-pull/open-drain options, integrated temperature reference, EEPROM-based calibration storage, and support for both single-ended and differential capacitive sensors.
Technical Context
The ZSSC3123AI2T integrates a capacitance-to-digital converter (CDC) with programmable 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 using coefficients stored in on-chip EEPROM.
Temperature compensation is performed digitally using an internal reference sensor, eliminating external components. The device supports two independent measurement modes - Update Mode (active sampling) and Sleep Mode (≤1 μA at 85°C) - with configurable update rates and separate timing control for capacitance and temperature readings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input capacitance range | Up to 260 pF - supports wide variety of MEMS and PCB-based capacitive sensors without external scaling. |
| Resolution & conversion time | 8-bit @ 0.7 ms, 10-bit @ 1.6 ms, 12-bit @ 5.0 ms, 14-bit @ 18.5 ms - enables trade-off between speed and precision per system latency budget. |
| Accuracy | ±0.25% FSO over –40°C to +125°C at 3 V/5 V, VSUPPLY ±10% - meets high-reliability industrial sensing requirements without recalibration. |
| Supply voltage | 2.3 V to 5.5 V - compatible with battery-powered (e.g., 3.3 V Li-ion) and industrial rail (5 V) systems. |
| Current consumption | 750 μA typical active; ≤1 μA sleep at 85°C - enables multi-year operation in energy-constrained IoT sensor nodes. |
| Output interfaces | I²C, SPI, PDM (capacitance & temperature), dual alarms - provides flexible host MCU integration and analog-ratiometric output without ADC. |
| Operating temperature | –40°C to +125°C - qualified for under-hood automotive, factory automation, and harsh-environment industrial use. |
Pinout & Package
Package: 14-pin TSSOP (4.4 × 5.0 mm), RoHS-compliant, surface-mount. Pinout validated per Renesas ZSSC3123 Datasheet Rev. Nov 2021, Pages 7–8 (Pin Assignments and Pin Descriptions).
| 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 | Digital and analog ground common node; requires low-impedance connection to PCB ground plane. |
| C0 / C1 | Capacitive sensor inputs | C0 = primary 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, mode selected via EEPROM configuration. |
| SDA/MISO | Data I/O | I²C data (SDA) or SPI master-in/slave-out (MISO); bidirectional, open-drain/push-pull configurable. |
| SS | SPI slave select | Active-low chip select for SPI interface; high-impedance when unused in I²C mode. |
| Alarm_High / Alarm_Low | Dual alarm outputs | Programmable push-pull or open-drain outputs; each independently configured as high/low threshold alarm. |
| Ready / PDM_C | Status or PDM output | Indicates measurement completion (Ready) or outputs filtered ratiometric capacitance (PDM_C). |
| Alarm_Low / PDM_T | Shared function pin | Configurable as second alarm or PDM-encoded temperature output (PDM_T); not simultaneously active. |
Key Features
| Feature | Design Value |
|---|---|
| Digital sensor compensation | Piecewise 1st/2nd-order or single-region 3rd-order correction - eliminates need for analog trimming and reduces calibration labor. |
| Integrated temperature reference | On-die thermal sensor with no external components required - ensures consistent temperature compensation across batches and environments. |
| Configurable output formats | I²C, SPI, PDM, or dual alarms - allows direct connection to microcontrollers, ASICs, or analog signal chains without external converters. |
| Low-power sleep mode | ≤1 μA current at 85°C - extends battery life in wireless sensor transmitters and portable instrumentation. |
| EEPROM-based calibration | Non-volatile storage of coefficients and configuration - enables one-pass digital calibration and field reprogramming. |
| Differential & single-ended support | Accepts either C0-only (single-ended) or C0/C1 (differential) sensor topologies - increases design flexibility for noise-immune layouts. |
Applications
| Industrial Pressure Sensing | Automotive HVAC Control |
|---|---|
|
Use Scenario: MEMS capacitive pressure sensor in industrial process monitoring with wide temperature variation and long service life requirements. IC Role / Device Role / Timing Role: Primary signal conditioner converting raw capacitance shifts into calibrated digital output with temperature compensation. Use Value: ±0.25% FSO accuracy over –40°C to +125°C and EEPROM-stored calibration eliminate field recalibration cycles and reduce maintenance cost. |
Use Scenario: Cabin air flap position feedback in automotive HVAC systems requiring robustness against EMI and thermal cycling. IC Role / Device Role / Timing Role: Capacitance-to-digital interface with dual alarm outputs for end-stop detection and fault signaling. Use Value: Differential input mode rejects common-mode noise from motor drivers; PDM outputs interface directly to low-cost microcontrollers without external ADC. |
| Tank Level Monitoring | Medical Disposable Sensors |
|
Use Scenario: Conductive or dielectric fluid level detection in stainless-steel tanks using PCB-based capacitive electrodes. IC Role / Device Role / Timing Role: High-resolution (14-bit) capacitance measurement with programmable span/offset to match electrode geometry and fluid permittivity. Use Value: 260 pF input range accommodates large-area electrodes; 18.5 ms conversion time enables stable averaging in slow-changing liquid level applications. |
Use Scenario: Single-use capacitive biosensors in point-of-care diagnostics where size, power, and calibration traceability are critical. IC Role / Device Role / Timing Role: Ultra-low-power signal conditioner with ≤1 μA sleep current and digital calibration storage for batch-specific coefficients. Use Value: Die-level packaging option enables chip-on-board integration; EEPROM retention >10 years ensures calibration validity throughout product shelf life. |
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 | IMU with integrated capacitive interface only for proprietary TDK sensors; no standalone CDC, no EEPROM calibration, no PDM output. | Designed exclusively for TDK's own pressure/humidity combo modules - not configurable for third-party capacitive elements. | Select ZSSC3123AI2T for custom sensor designs requiring full configurability, wide capacitance range, and field-programmable calibration. |
| Analog Devices AD7745 | 24-bit CDC with 17 pF max input range, no built-in temperature compensation engine, no EEPROM, I²C-only interface, higher supply current (350 μA active). | Best suited for high-precision lab-grade measurements where temperature drift is managed externally or via software. | Choose ZSSC3123AI2T when integrated temperature compensation, dual alarms, PDM output, and ultra-low sleep current (<1 μA) are required. |
Compared with AD7745 and ICM-42688-P, the ZSSC3123AI2T uniquely combines wide-input-range CDC (260 pF), on-die temperature compensation, EEPROM-based calibration, dual alarm outputs, and sub-μA sleep - making it optimal for self-contained, production-deployable capacitive sensor nodes.
Availability
ZSSC3123AI2T is available at Aetrix Electronics and suitable for industrial pressure sensing, automotive HVAC control, tank level monitoring, and medical disposable sensor applications requiring stable component supply, long-term calibration integrity, and extended temperature operation.
Supply support for ZSSC3123AI2T 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 markets.
The ZSSC3123AI2T belongs to Renesas' cLite™ family of highly integrated capacitive signal conditioners, designed specifically for cost-sensitive, high-volume capacitive sensing applications requiring minimal external components and digital calibration.
FAQ
What is the maximum sensor capacitance supported by the ZSSC3123AI2T?
The ZSSC3123AI2T supports sensor capacitances up to 260 pF, selectable via CDC multiplier settings (Mult1–Mult8). This range covers most commercial MEMS, PCB, and ceramic capacitive sensors without external scaling networks. The device automatically adjusts resolution and conversion time based on the selected full-scale range, as defined in Tables 6–9 of the Renesas datasheet.
Does the ZSSC3123AI2T require external components for temperature compensation?
No, the ZSSC3123AI2T includes an internal temperature sensor and digital compensation engine - no external thermistors, RTDs, or reference circuits are needed. Temperature drift correction for both offset and sensitivity is applied in real time using coefficients stored in on-chip EEPROM, ensuring accuracy across –40°C to +125°C without added BOM cost or layout complexity.
Can the ZSSC3123AI2T interface with a microcontroller using only I²C?
Yes, the ZSSC3123AI2T fully supports I²C communication (standard and fast mode) for configuration, calibration, and data readout. SCL/SCLK and SDA/MISO pins operate as I²C bus lines when the device is configured in I²C mode via EEPROM. No additional level-shifting or protocol translation is required for compatibility with common 3.3 V or 5 V microcontrollers.
How does the ZSSC3123AI2T handle calibration storage and reprogramming?
The ZSSC3123AI2T stores calibration coefficients and configuration parameters in on-chip EEPROM, which retains data for >10 years. Calibration is performed once using an I²C-connected PC or MCU, writing coefficients directly to designated EEPROM words (e.g., ZMDI_Config, C_Config). Field updates are supported without hardware changes - enabling post-manufacture calibration and firmware-driven parameter tuning.
What are the power consumption characteristics of the ZSSC3123AI2T in low-power applications?
In Sleep Mode, the ZSSC3123AI2T draws ≤1 μA at 85°C - ideal for battery-powered sensor nodes with infrequent wake-up intervals. Active current ranges from 60 μA (low-speed, low-resolution) to 750 μA (full-speed, high-resolution), scalable via configuration bits. Power-down periods and measurement frequency are fully programmable in EEPROM to match application duty-cycle requirements.
ZSSC3123AI2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- RBicLite™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Sensor Signal Conditioner - Resistive
- Interface:
- I2C, SPI
- Voltage - Supply:
- 2.3V ~ 5.5V
- Supplier Device Package:
- 14-TSSOP
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
ZSSC3123AI2T FAQ
1.How can I place an order for ZSSC3123AI2T through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSSC3123AI2T 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 ZSSC3123AI2T reliable?
The price and inventory of ZSSC3123AI2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSSC3123AI2T is usually 5 days.
3.What payment methods are accepted for ZSSC3123AI2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSSC3123AI2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSSC3123AI2T?
ZSSC3123AI2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSSC3123AI2T 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 ZSSC3123AI2T?
For technical support, including ZSSC3123AI2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSSC3123AI2T requirements.
6.How does Aetrix verify that ZSSC3123AI2T is sourced from the original manufacturer or authorized distributors?
All ZSSC3123AI2T 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 ZSSC3123AI2T meets industry standards.
7.What is the process for return or replacement of ZSSC3123AI2T?
All ZSSC3123AI2T units undergo pre-shipment inspection (PSI). If there is an issue with ZSSC3123AI2T, 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 ZSSC3123AI2T part is unused and in its original packaging.
Return procedure for ZSSC3123AI2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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