Renesas ZSSC3018BA2B

Overview

ZSSC3018BA2B from Renesas Electronics is a high-accuracy sensor signal conditioner IC designed for resistive bridge and absolute voltage sensors, featuring 18-bit ADC resolution, programmable gain (6.6–216), digital 1st/2nd-order temperature compensation, and dual I²C (≤3.4 MHz) or SPI (≤10 MHz) digital output. It delivers fully corrected sensor data with ±0.10% FSO accuracy over –40°C to +125°C in industrial pressure and thermopile-based temperature modules.

For engineers reviewing the ZSSC3018BA2B datasheet, ZSSC3018BA2B pinout, ZSSC3018BA2B application, or ZSSC3018BA2B equivalent, this page provides verified technical context, validated pin assignments for the 24-PQFN package, confirmed calibration architecture, real-world application constraints, and two manufacturer-validated alternative parts for calibrated sensor front-end designs.

Technical Context

The ZSSC3018BA2B integrates a 26-bit DSP core executing correction algorithms for offset, span, and 1st/2nd-order temperature drift of bridge or voltage-source sensors. Its analog front end includes a fully programmable PGA and 18-bit sigma-delta ADC with internal reference (VDDB = 1.68 V typ), supporting raw conversion rates up to 1.1 kHz (18-bit) and conditioned output at ≥270 Hz.

Digital interface operation supports both SPI (CPHA=0/1, ≤10 MHz) and I²C (standard/fast mode, ≤3.4 MHz), with interrupt-driven EOC signaling. Calibration coefficients are stored in on-chip MTP memory (10,000 write cycles, 10-year retention at 125°C), programmed via serial interface without external trimming components.

Key Specifications

Pinout & Package

Package: 24-pin PQFN (4 mm × 4 mm, 0.5 mm pitch), wettable flank, RoHS-compliant. Designed for die-die bonding in chip-on-board pressure modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICM-42688-P and AD7791, the ZSSC3018BA2B uniquely integrates 18-bit bridge/voltage conditioning, on-chip 26-bit DSP, internal temperature sensing, and MTP storage - delivering calibrated digital output with zero host processing overhead and guaranteed ±0.10% FSO accuracy across temperature.

Availability

ZSSC3018BA2B is available at Aetrix Electronics and suitable for industrial pressure transmitters, automotive barometric modules, thermopile-based temperature sensors, and weather station subsystems requiring stable component supply and long-term calibration integrity.

Supply support for ZSSC3018BA2B 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 specializing in microcontrollers, analog, power, and sensor interface solutions for automotive, industrial, and IoT applications.

The ZSSC3018BA2B belongs to Renesas' Sensor Signal Conditioner product line, engineered specifically for high-accuracy, low-power conditioning of resistive bridge and absolute voltage sensors in harsh-environment applications.

FAQ

What is the primary function of the ZSSC3018BA2B in a sensor system?

The ZSSC3018BA2B serves as a complete sensor signal conditioner that acquires, amplifies, digitizes, and digitally corrects signals from resistive bridge or absolute voltage sensors. It performs real-time 1st/2nd-order temperature compensation and non-linearity correction using its embedded 26-bit DSP and on-chip MTP-stored coefficients - delivering fully calibrated 18-bit digital output via I²C or SPI without host intervention. The ZSSC3018BA2B eliminates need for external amplifiers, ADCs, temperature sensors, or calibration firmware.

Does the ZSSC3018BA2B support both bridge and voltage-source sensors?

Yes, the ZSSC3018BA2B is explicitly designed for two sensor types: resistive bridge sensors (e.g., pressure transducers) and absolute voltage-source sensors (e.g., thermopiles). Its analog front end configures automatically based on input configuration, and its DSP correction algorithms apply appropriate compensation models - bridge mode uses AZSM/SM/AZTM/TM sequences, while voltage-source mode applies dedicated offset/gain/temperature math. Both modes use the same ZSSC3018BA2B silicon and pinout.

What is the role of the VDDB pin on the ZSSC3018BA2B?

The VDDB pin on the ZSSC3018BA2B is an internally regulated 1.68 V (±4.2%) analog supply output used to power external bridge sensors and serve as the ADC reference voltage. This dedicated low-noise, high-PSRR regulator ensures stable excitation and precise digitization - critical for achieving ±0.10% FSO accuracy. VDDB must be decoupled with a 100 nF capacitor to VSSB and cannot be externally driven or loaded beyond 1.8 mA.

How does the ZSSC3018BA2B achieve ultra-low-power operation?

The ZSSC3018BA2B achieves ultra-low-power operation through hardware-managed sleep mode (50 nA typical at ≤125°C), dynamic clock gating, and autonomous measurement sequencing. In Normal Mode, it wakes autonomously, completes a full conditioned measurement (sensor + temperature + offset), asserts EOC, then returns to sleep - all without host CPU involvement. Its 1.68–3.6 V supply range and 1.05 mA active current further optimize energy efficiency for battery-powered nodes. The ZSSC3018BA2B supports wake-up intervals from milliseconds to hours.

Can the ZSSC3018BA2B be reprogrammed after initial calibration?

Yes, the ZSSC3018BA2B features on-chip multiple-time programmable (MTP) memory rated for ≥10,000 write cycles with 10-year data retention at 125°C. Calibration coefficients - including offset, gain, temperature drift, and non-linearity terms - can be updated in-system via I²C or SPI without disassembly or reflow. Reprogramming requires the Renesas SSC Calibration Software and standard serial interface; no special voltage or timing sequences are needed. Each ZSSC3018BA2B retains its unique calibration dataset independently.