Renesas ZSC31010CIB

Overview

ZSC31010CIB from Integrated Device Technology (IDT) is a sensor signal conditioner IC designed for precision calibration of resistive bridge sensors. It provides digital offset/gain/linearity compensation over temperature, supports 14-bit ADC resolution, ±0.1% FSO accuracy at –25°C to +85°C, and delivers rail-to-rail ratiometric analog output (0–1 V or 0–V_DD) or ZACwire™ one-wire digital output - used in industrial pressure transducers and automotive load cells.

For engineers reviewing the ZSC31010CIB datasheet, ZSC31010CIB pinout, ZSC31010CIB application, or ZSC31010CIB equivalent, key selection criteria include its chopper-stabilized differential AFE, second-order temperature compensation capability, SOP-8 package compatibility, and support for both low-voltage (2.7–5.5 V) and high-voltage (5.5–30 V with JFET) operation.

Technical Context

The ZSC31010CIB integrates a chopper-stabilized true-differential 14-bit ADC, bandgap-based PTAT temperature sensor, and on-chip DSP with EEPROM for coefficient storage. Its analog front-end accepts bridge inputs from 3 mV/V to 105 mV/V and applies programmable gain (6/12/24/48) before digitization.

Digital correction includes first- and second-order compensation for offset, gain, and bridge nonlinearity across temperature. Output is configurable as rail-to-rail ratiometric analog (0–V_DD), absolute analog (0–1 V), or ZACwire™ serial data - with optional sequential bridge + temperature readings.

Key Specifications

Pinout & Package

SOP-8 (150 mil) package with exposed pad for thermal performance and EMI reduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1452AESA+ and AD7793BRUZ, the ZSC31010CIB delivers turnkey bridge conditioning with embedded compensation, one-wire configurability, and SOP-8 footprint - reducing time-to-market and eliminating external signal chain components.

Availability

ZSC31010CIB is available at Aetrix Electronics and suitable for industrial pressure transducers, automotive load cells, and white goods level sensors requiring stable component supply, long-lifecycle support, and consistent calibration performance.

Supply support for ZSC31010CIB 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, designs high-performance timing, memory interface, and sensor signal conditioning ICs for industrial, automotive, and communications markets.

The ZSC31010CIB belongs to IDT's RBicLite™ family of sensor signal conditioners - engineered specifically for cost-effective, high-accuracy calibration of resistive bridge sensors in building automation, industrial controls, and white goods.

FAQ

What is the maximum bridge resistance supported by the ZSC31010CIB?

The ZSC31010CIB supports bridge resistances from 0.2 kΩ to 100 kΩ per the datasheet's recommended operating conditions. At the lower end, use of the Bsink feature introduces ratiometricity error that increases below 1 kΩ; above 1 kΩ, accuracy remains within specified limits. The 100 kΩ upper limit ensures proper biasing and noise performance of the PREAMP block.

Does the ZSC31010CIB require an external crystal or oscillator?

No, the ZSC31010CIB includes an internal POR oscillator and clock generator - no external crystal or oscillator is required. The internal oscillator is trimmed during manufacturing and supports all operating modes including ZACwire™ communication and ADC sampling. Oscillator trimming can be adjusted via EEPROM if needed for specific timing accuracy requirements.

Can the ZSC31010CIB operate from a 3.3 V supply?

Yes, the ZSC31010CIB operates from 2.7 V to 5.5 V, making 3.3 V fully supported. At 3.3 V, the SIG™ output delivers 0–3.3 V ratiometric or 0–1 V absolute analog output, and the ZACwire™ interface remains functional with appropriate pull-up voltage. Current consumption scales linearly, typically 0.25–1.0 mA depending on update rate.

How is temperature compensation implemented in the ZSC31010CIB?

The ZSC31010CIB uses an on-chip bandgap-based PTAT (proportional-to-absolute-temperature) sensor to measure die temperature. Its DSP applies stored second-order coefficients to correct offset, gain, and bridge linearity errors versus temperature - all without external components. Calibration coefficients are written to EEPROM during factory or PC-based mass calibration.

What is the function of the Bsink pin on the ZSC31010CIB?

The Bsink pin on the ZSC31010CIB provides a controlled current sink for bridge excitation, enabling ratiometric operation with low-resistance bridges (<1 kΩ). When enabled, it improves common-mode rejection and reduces ratiometric error caused by bridge resistance mismatch. It is optional and disabled by default; activation requires configuration via ZACwire™ command.