Renesas ZSC31010CIG1-R

Overview

ZSC31010CIG1-R from Integrated Device Technology (IDT) is a precision sensor signal conditioner IC designed for resistive bridge sensors, featuring 14-bit ADC resolution, ±0.1% FSO accuracy over –25°C to +85°C, and digital compensation of offset, gain, temperature drift, and non-linearity. It supports rail-to-rail ratiometric analog output (0–VDD), absolute 0–1 V output, or ZACwire™ one-wire digital interface - deployed in industrial pressure, load cell, and HVAC sensing systems.

For engineers reviewing the ZSC31010CIG1-R datasheet, ZSC31010CIG1-R pinout, ZSC31010CIG1-R application, or ZSC31010CIG1-R equivalent, key selection criteria include its chopper-stabilized differential AFE, EEPROM-based second-order temperature compensation, 1 ms typical response time, and SOP8 package compatibility with high-voltage operation (up to 30 V with external JFET).

Technical Context

The ZSC31010CIG1-R integrates a chopper-stabilized true-differential 14-bit ADC, bandgap-based PTAT temperature sensor, and on-chip DSP with 256-byte EEPROM for storing calibration coefficients. Its analog front-end accepts bridge inputs from 3 mV/V to 105 mV/V and supports programmable preamp gain (6/12/24/48) to optimize resolution across sensor sensitivities.

Digital output uses IDT's proprietary ZACwire™ one-wire interface (OWI) with Manchester-encoded frames; analog output offers two modes - ratiometric (0–VDD) or absolute (0–1 V referenced to internal bandgap). The device operates from 2.7–5.5 V (or 5.5–30 V with external JFET) and features power-on reset, POR threshold at 1.4–2.6 V, and start-up time of 10 ms.

Key Specifications

Pinout & Package

SOP8 (150 mil) package - 5.0 mm × 4.0 mm × 1.5 mm body, gull-wing leads, JEDEC MS-012AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1452ACM+T and AD7793BRUZ, the ZSC31010CIG1-R delivers turnkey calibration with embedded DSP and EEPROM, eliminating host processor overhead and reducing time-to-market for bridge-based sensing products - especially where one-wire simplicity or dual analog output modes are required.

Availability

ZSC31010CIG1-R is available at Aetrix Electronics and suitable for industrial pressure transducers, automotive load cells, HVAC differential pressure sensors, and white goods flow meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ZSC31010CIG1-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

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor signal conditioning ICs for industrial, communications, and automotive markets.

The ZSC31010 belongs to IDT's RBicLite™ family of sensor signal conditioners - engineered specifically for cost-sensitive, high-accuracy resistive bridge applications in building automation, white goods, and industrial control systems.

FAQ

What is the maximum bridge excitation voltage supported by the ZSC31010CIG1-R?

The ZSC31010CIG1-R does not provide active bridge excitation; it conditions signals from externally excited bridges. Its VBP/VBN inputs tolerate common-mode voltages from 1 V to VDD–1.3 V. When used with the optional Bsink feature, bridge excitation is derived from VDD (2.7–5.5 V) or regulated 5.5–30 V supply via external JFET - enabling compatibility with standard 3.3 V, 5 V, or 24 V bridge drivers. The ZSC31010CIG1-R itself operates within these supply limits and does not generate excitation voltage.

Does the ZSC31010CIG1-R require external components for basic operation?

Yes - the ZSC31010CIG1-R requires at minimum a 100–470 nF decoupling capacitor on VDD, a pull-up resistor on OUT/OWI for ZACwire™ communication, and optional external JFET (e.g., MMBF4392) with 0.1 µF gate capacitor for high-voltage operation. For analog output, a 2.5–10 kΩ load to VDD or VSS is recommended. No external trimming components are needed for calibration due to integrated EEPROM and DSP - the ZSC31010CIG1-R is designed for self-contained signal conditioning.

Can the ZSC31010CIG1-R perform temperature compensation without an external sensor?

Yes - the ZSC31010CIG1-R includes an on-chip bandgap-based PTAT (proportional-to-absolute-temperature) sensor that measures die temperature with sufficient accuracy for second-order compensation of offset and gain drift. This eliminates the need for external NTC or digital temperature sensors in most applications. The ZSC31010CIG1-R can optionally output temperature data alongside bridge readings via ZACwire™, and its EEPROM stores temperature coefficient coefficients for automatic correction.

What is the function of the N/C pin on the ZSC31010CIG1-R SOP8 package?

The N/C (No Connect) pin on the ZSC31010CIG1-R SOP8 package is internally unconnected and must remain floating - it is not bonded and serves no electrical function. Per datasheet Table 6.2 and Figure 6.1, this pin is reserved for future use or mechanical alignment and must not be tied to VDD, VSS, or any other net. Leaving it unconnected ensures compliance with IDT's validated layout and reliability requirements for the ZSC31010CIG1-R.

How does the ZSC31010CIG1-R achieve ±0.1% FSO accuracy over temperature?

The ZSC31010CIG1-R achieves ±0.1% FSO accuracy from –25°C to +85°C through a combination of chopper-stabilized analog front-end circuitry, 14-bit ADC with ≤±4 LSB INL, and factory-programmed second-order polynomial coefficients stored in on-chip EEPROM. These coefficients correct for offset, gain, and linearity errors across temperature - applied in real time by the integrated DSP. The ZSC31010CIG1-R's bandgap PTAT sensor provides the temperature reference, and its calibrated DAC output maintains tight absolute and ratiometric output tolerances without external components.