Renesas ZSSC3230BI1DES

Overview

ZSSC3230BI1DES from Renesas Electronics is a capacitive sensor signal conditioner IC performing high-accuracy capacitance-to-digital conversion with on-chip digital compensation for offset, sensitivity, and temperature drift. It supports 0–30 pF sensor capacitance, delivers up to 18-bit resolution, operates from 1.68–3.6 V, and outputs corrected values via I²C (up to 3.4 MHz) in humidity, pressure, and level sensing systems.

For engineers reviewing the ZSSC3230BI1DES datasheet, ZSSC3230BI1DES pinout, ZSSC3230BI1DES application, or ZSSC3230BI1DES equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (Sleep/Command/Cyclic), calibrated accuracy of ±0.1%FSO, and real-world use cases in energy-efficient smart sensors and medical devices.

Technical Context

The ZSSC3230BI1DES integrates a programmable charge-voltage converter (CVC), 12–18-bit ADC, internal temperature sensor (55 LSB/K), and DSP core executing sensor-specific correction math using coefficients stored in 1000–10,000-cycle NVM. Its analog front-end supports differential and single-ended capacitive inputs with 0–15 pF offset compensation.

It implements three autonomous operating modes: Sleep Mode (0.07–1 µA idle current), Command Mode (full register access, low-latency calibration), and Cyclic Measurement Mode (autonomous updates at up to 290 Hz). All modes use the same I²C interface and share identical pinout and electrical specs across package variants.

Key Specifications

Pinout & Package

Package: 4 × 4 mm², 24-pin PQFN (exposed thermal pad), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar capacitive sensor signal conditioning applications.

Compared with the AD7745 and ICM-42688-P, the ZSSC3230BI1DES uniquely integrates sensor-specific correction math, field-programmable NVM, and autonomous cyclic operation-enabling true "sensor-to-digital" functionality with zero host intervention for calibrated output.

Availability

ZSSC3230BI1DES is available at Aetrix Electronics and suitable for humidity sensing, pressure transduction, and medical capacitive monitoring requiring stable component supply, long-term calibration retention, and automotive-grade temperature operation.

Supply support for ZSSC3230BI1DES 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 industrial, automotive, and IoT applications with emphasis on reliability and energy efficiency.

The ZSSC3230 product line targets high-accuracy capacitive sensing in resource-constrained environments, integrating signal conditioning, compensation math, and programmable NVM to replace multi-chip sensor front-ends with a single autonomous IC.

FAQ

What is the primary function of the ZSSC3230BI1DES in a capacitive sensor system?

The ZSSC3230BI1DES serves as a fully integrated capacitive sensor signal conditioner that performs analog capacitance-to-digital conversion, applies sensor-specific digital correction (offset, sensitivity, temperature drift), and outputs calibrated results via I²C or PDM. It eliminates the need for external microcontrollers to handle compensation math, making it ideal for self-contained smart sensors where the ZSSC3230BI1DES manages the entire signal chain from C_MEAS to digital output.

Does the ZSSC3230BI1DES support both differential and single-ended capacitive sensor configurations?

Yes, the ZSSC3230BI1DES supports both configurations: differential mode connects C_MEAS between C0 and CC (or CC′), while single-ended mode grounds C0 and connects C_MEAS between CC (or CC′) and VSS. Pin selection (CC vs. CC′) is configurable via memory register 19HEX, and the shield driver feature further enhances noise immunity in either topology-key for robust operation of the ZSSC3230BI1DES in electrically noisy environments.

How does the ZSSC3230BI1DES achieve ±0.1%FSO accuracy across temperature?

The ZSSC3230BI1DES achieves ±0.1%FSO accuracy by combining an internal 14-bit temperature sensor with on-chip DSP execution of 1st- and 2nd-order compensation algorithms using calibration coefficients stored in its NVM. These coefficients are programmed during factory calibration and applied in real time to each capacitance measurement, ensuring the ZSSC3230BI1DES maintains specified accuracy from −40°C to +125°C without external reference components or software intervention.

What are the power consumption characteristics of the ZSSC3230BI1DES in different operating modes?

In Sleep Mode, the ZSSC3230BI1DES draws 0.07–1 µA; in active measurement, it consumes 750–1100 µA. At 1 sample/sec, average current is 1.3 µA-enabling >10-year operation on a CR2032 battery. Wake-up time is under 2 ms, and start-up time after power-on is ≤2.5 ms. These values are measured and guaranteed for the ZSSC3230BI1DES across its full operating voltage (1.68–3.6 V) and temperature range.

Can the ZSSC3230BI1DES be reprogrammed in the field, and what is its NVM endurance?

Yes, the ZSSC3230BI1DES features multiple-time programmable (MTP) NVM with 1000–10,000 write cycles and guaranteed 10-year data retention. Calibration coefficients, operating parameters, and user-defined data can be updated in-system via I²C. Each 16-bit word requires ~20 ms to program, and the ZSSC3230BI1DES supports full memory verification post-write-making field recalibration and configuration updates fully supported throughout the device lifetime.