Renesas ZSC31050FAG1-R

Overview

ZSC31050FAG1-R from Renesas Electronics is a CMOS-based differential sensor signal conditioner IC designed for high-accuracy amplification and digital compensation of resistive bridge sensors (e.g., piezoresistive pressure, force, and torque sensors) and temperature signals. It integrates a 16-bit RISC microcontroller executing polynomial correction algorithms to compensate offset, sensitivity, temperature drift, and nonlinearity. Key confirmed specs include ±0.1% FSO accuracy at –25°C to +85°C, 16-pin SSOP package, 2.7–5.5V supply, and support for I²C, SPI, and ZACwire™ interfaces - deployed in industrial 4–20mA transmitters and medical blood pressure monitors.

For engineers reviewing the ZSC31050FAG1-R datasheet, ZSC31050FAG1-R pinout, ZSC31050FAG1-R application, or ZSC31050FAG1-R equivalent, this page delivers verified technical context, calibrated output resolution (up to 15 bits), bridge excitation options (ratiometric voltage/constant current), AEC-Q100 Grade 0 qualification, and real-world use cases including strain gauge signal conditioning and end-of-line calibration via ZACwire™.

Technical Context

The ZSC31050FAG1-R implements a dual-path analog front-end with programmable gain amplifier (PGA) and multiplexer routing bridge, internal diode, or external thermistor inputs to a 9–15-bit ADC. Its digital correction engine applies sensor-specific coefficients stored in on-chip EEPROM to compute compensated outputs using a ROM-resident polynomial algorithm.

It supports three distinct output modes: analog (0–5V or 4–20mA), PWM (9–12-bit resolution, up to 3.9kHz), or digital (I²C/SPI/ZACwire™). The flexible I/O pins (FIO1/FIO2) enable configurable function assignment, while built-in sensor aging detection performs common-mode checks on bridge connections.

Key Specifications

Pinout & Package

Package: 16-pin SSOP (Small Outline Package), 150 mil width, 0.65 mm pitch - RoHS-compliant surface-mount footprint compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1452ACM+T and AD8555ARZ, the ZSC31050FAG1-R uniquely integrates correction computation, nonvolatile storage, and multi-protocol digital interfaces - reducing bill-of-materials, PCB area, and calibration labor while enabling field-updatable sensor modules.

Availability

ZSC31050FAG1-R is available at Aetrix Electronics and suitable for industrial 4–20mA transmitters, medical blood pressure monitors, and automotive oil pressure sensing requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for ZSC31050FAG1-R 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, and power solutions for industrial, automotive, and IoT applications.

The ZSC31050FAG1-R belongs to Renesas' high-accuracy sensor signal conditioner product line, engineered specifically to replace discrete analog signal chains in bridge-based pressure, force, and torque measurement systems with a single, digitally calibrated IC.

FAQ

What is the primary function of the ZSC31050FAG1-R in a sensor system?

The ZSC31050FAG1-R serves as a complete differential sensor signal conditioner for resistive bridge sensors. It performs analog amplification, digitization, and digital compensation of offset, sensitivity, temperature drift, and nonlinearity using an on-chip 16-bit RISC microcontroller and polynomial correction algorithm. This eliminates the need for external trimming components and enables high-accuracy outputs such as 0–5V, 4–20mA, or digital bus signals - all within a single 16-SSOP package.

Does the ZSC31050FAG1-R support AEC-Q100 qualification, and for which temperature grade?

Yes, the ZSC31050FAG1-R is AEC-Q100 qualified for Grade 0 (–40°C to +150°C), with derated operation up to +150°C depending on the specific variant. This makes it suitable for automotive applications such as oil pressure and temperature sensing where reliability under extreme thermal stress is required. The qualification is explicitly documented in the official Renesas datasheet for ZSC31050FAG1-R.

How does the ZACwire™ interface benefit production calibration of the ZSC31050FAG1-R?

The ZACwire™ interface enables end-of-line calibration of the sensor module using a single-wire connection, eliminating the need for additional PCB traces, connectors, or test fixtures. This simplifies final test setup, reduces manufacturing cost, and supports field recalibration. For the ZSC31050FAG1-R, ZACwire™ operates with a 20 ms start window and supports load capacitance up to 0.08 × t_{OWI_BIT}/R_{OWI_PU}, as specified in the Renesas functional description.

What are the supported bridge excitation methods for the ZSC31050FAG1-R?

The ZSC31050FAG1-R supports three bridge excitation configurations: ratiometric voltage, constant voltage, and constant current. These are selected via configuration registers and allow optimization for different sensor types - e.g., constant current for steel membrane sensors to minimize self-heating effects, or ratiometric mode for improved supply rejection in 4–20mA loop-powered systems. The excitation method directly impacts accuracy, thermal stability, and compatibility with sensor physics.

Can the ZSC31050FAG1-R interface with both internal and external temperature sensors?

Yes, the ZSC31050FAG1-R supports multiple temperature sensing sources: its internal pn-junction diode, an external diode connected to the IR_TEMP pin, or a thermistor. The selection is programmable via the Temp. Sens. Select register. Bias current for external diodes is adjustable between 8–40 µA, and sensitivity is specified at 75–210 µV/LSB for external measurements - enabling precise thermal drift compensation tailored to the sensor's thermal response profile.