Renesas ZSC31010CED

Overview

ZSC31010CED from Integrated Device Technology (IDT) is a sensor signal conditioner IC designed for precision calibration of resistive bridge sensors, featuring 14-bit ADC resolution, ±0.25% FSO accuracy over –50°C to +150°C, and selectable 0–1 V or rail-to-rail ratiometric analog output. It performs digital compensation of offset, gain, temperature drift, and non-linearity in industrial pressure and load cell systems.

For engineers reviewing the ZSC31010CED datasheet, ZSC31010CED pinout, ZSC31010CED application, or ZSC31010CED equivalent, this page delivers verified technical context, real-world design meaning for key specs, SOP8 package details, and two validated alternative options for bridge sensor signal conditioning with EEPROM-based calibration.

Technical Context

The ZSC31010CED integrates a chopper-stabilized true differential 14-bit ADC with programmable analog gain (6/12/24/48), a DSP core executing second-order temperature compensation for offset and gain, and an on-chip EEPROM storing calibration coefficients. Its AFE supports bridge spans from 3 mV/V to 105 mV/V with ≤0.04% digital linearity error.

It features dual-output capability: a buffered 11-bit DAC delivering either 0–1 V absolute or rail-to-rail ratiometric voltage output, plus a ZACwire™ one-wire serial interface supporting sequential bridge+temperature data reads. The internal bandgap PTAT circuit enables accurate on-die temperature sensing without external components.

Key Specifications

Pinout & Package

SOP8 (150 mil) package with 1.27 mm pitch, RoHS-compliant, rated for reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1452AESA+ and AD8422ARZ, the ZSC31010CED provides fully integrated calibration-including second-order temperature compensation, EEPROM storage, and one-wire configuration-in a single SOP8 package, reducing system-level design effort and test time while maintaining ±0.25% FSO accuracy over –50°C to +150°C.

Availability

ZSC31010CED is available at Aetrix Electronics and suitable for industrial pressure transducers, automotive load cells, and white goods level sensors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ZSC31010CED 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 solutions.

The ZSC31010CED belongs to IDT's RBicLite™ family of sensor signal conditioners, engineered specifically for cost-sensitive, high-volume bridge sensor applications in industrial automation, automotive, and appliance markets where precision, integration, and ease of calibration are critical.

FAQ

What is the primary function of the ZSC31010CED in a sensor system?

The ZSC31010CED serves as a complete sensor signal conditioner for resistive bridge sensors, performing digital offset, gain, and second-order temperature compensation using on-chip EEPROM-stored coefficients. It converts raw bridge signals into calibrated analog (0–1 V or rail-to-rail) or digital (ZACwire™) outputs-eliminating external trimming components and simplifying factory calibration. The ZSC31010CED integrates a 14-bit ADC, DSP engine, and buffered DAC in a single SOP8 package.

Does the ZSC31010CED support both analog and digital output simultaneously?

No, the ZSC31010CED does not support simultaneous analog and digital output. Its SIG™ pin delivers either a calibrated analog voltage (0–1 V absolute or rail-to-rail ratiometric), while the OUT/OWI pin provides ZACwire™ serial digital output. Output mode is configured during EEPROM programming-users select one primary output type per device. The ZSC31010CED can sequentially output bridge and temperature data digitally, but analog output remains active only when digital mode is disabled.

What is the maximum bridge resistance supported by the ZSC31010CED?

The ZSC31010CED supports bridge resistances from 0.2 kΩ to 100 kΩ, as specified in its Recommended Operating Conditions. At the lower end, use of the Bsink feature improves ratiometric accuracy for bridges below ~1 kΩ by actively sinking current. For bridges above 10 kΩ, leakage current (±10 nA at VBP/VBN) has negligible impact on measurement accuracy. The ZSC31010CED's input stage is optimized for standard 350 Ω, 1 kΩ, and 3.5 kΩ strain gauge configurations.

How is temperature compensation implemented in the ZSC31010CED?

The ZSC31010CED implements temperature compensation using an on-die bandgap PTAT circuit that provides proportional-to-absolute-temperature voltage for internal measurement. Its DSP core applies second-order polynomial correction to both offset and gain coefficients stored in EEPROM, enabling independent compensation of temperature-induced drift in bridge sensitivity and zero point. This occurs automatically during each conversion cycle-no host intervention is required after initial calibration. The ZSC31010CED achieves ±0.25% FSO accuracy from –50°C to +150°C using this method.

Can the ZSC31010CED operate directly from a 24 V industrial supply?

Yes, the ZSC31010CED can operate from a 24 V supply when used with an external JFET regulator-specifically, the Vgate pin drives an N-channel JFET (e.g., MMBF4392) to drop 24 V down to 5.5 V for internal circuitry. This configuration is explicitly validated in the datasheet for VSUPP = 5.5–30 V operation. Without the JFET, the ZSC31010CED requires 2.7–5.5 V on VDD. The ZSC31010CED's absolute maximum rating for VDD is 6.0 V, so direct 24 V connection would damage the device.