Renesas ZSSC3135BE2T

Overview

ZSSC3135BE2T from Integrated Device Technology (IDT) is a sensor signal conditioner IC designed specifically for piezoresistive bridge sensors in automotive and industrial systems. It delivers 13/14-bit ADC resolution, analog gain up to 105, ratiometric analog voltage output (5–95% VDDE), and digital ZACwire™ One-Wire interface - enabling high-accuracy compensation of offset, sensitivity, temperature drift, and non-linearity in pressure or force sensing applications.

For engineers reviewing the ZSSC3135BE2T datasheet, ZSSC3135BE2T pinout, ZSSC3135BE2T application, or ZSSC3135BE2T equivalent, this device supports end-of-line one-pass calibration via I²C™ or ZACwire™, operates across –40°C to +150°C, integrates EEPROM-stored correction coefficients, and provides fail-safe sensor connection diagnostics and high-voltage protection up to 33 V.

Technical Context

The ZSSC3135BE2T implements a full-differential analog front-end with a programmable gain amplifier (PGA), multiplexer, and integrating switched-capacitor ADC - all controlled by an on-chip 16-bit RISC microcontroller executing sensor-specific correction algorithms. Its signal path handles differential bridge inputs referenced to VDDA/2, supporting configurable input common-mode ranges (29–65% VDDA) and span adjustments per PGA gain setting (e.g., 7.1 mV/V at gain 105).

Digital conditioning uses ROM-stored correction formulas and EEPROM-stored calibration coefficients to compute compensated outputs. Output modes include ratiometric analog voltage (12-bit DAC, ±0.5% FSO accuracy over –40°C to +125°C) or ZACwire™ serial readout, with startup time under 35 ms and system bandwidth up to 200 Hz at 13-bit ADC resolution and 3 MHz oscillator frequency.

Key Specifications

Pinout & Package

Package: JEDEC-compliant SSOP14 (Small Outline Package, 14-pin, 150 mil width), RoHS-compliant, qualified per AEC-Q100 Grade 0 for automotive use.

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 ZSSC3135BE2T provides fully integrated digital correction, fail-safe diagnostics, and automotive-grade protection in a single SSOP14 package - reducing system-level complexity, PCB area, and qualification effort for piezoresistive bridge applications.

Availability

ZSSC3135BE2T is available at Aetrix Electronics and suitable for automotive tire pressure monitoring, industrial hydraulic transducers, and medical disposable pressure sensors requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for ZSSC3135BE2T 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 for automotive, industrial, and communications markets.

The ZSSC313x product line was engineered to deliver highly accurate, calibrated, and robust signal conditioning for piezoresistive bridge sensors - targeting applications where sensor non-linearity, temperature drift, and field reliability are critical design constraints.

FAQ

What is the maximum operating temperature range supported by the ZSSC3135BE2T?

The ZSSC3135BE2T is rated for continuous operation from –40°C to +150°C, verified per AEC-Q100 Grade 0 qualification. This extended range applies specifically to the BE2 version (SSOP14 package), enabling deployment in under-hood automotive and high-temperature industrial environments where sensor stability is mission-critical. The ZSSC3135BE2T maintains specified accuracy and protection functionality across this full range.

Does the ZSSC3135BE2T support both analog and digital output simultaneously?

No, the ZSSC3135BE2T supports either ratiometric analog voltage output (AOUT pin) or digital output via ZACwire™/I²C™ - but not both simultaneously. Output mode is configured during EEPROM programming; switching requires reprogramming the CFGAPP register. The ZSSC3135BE2T does not provide parallel analog + digital readout from a single power cycle.

How is calibration performed for the ZSSC3135BE2T, and what equipment is required?

Calibration for the ZSSC3135BE2T is performed as a one-pass end-of-line procedure using either I²C™ or ZACwire™ interface. Required equipment includes IDT's ZSSC313x Mass Calibration System V1.1 or compatible PC-based tool running IDT-provided software, plus a precision pressure/force source and temperature chamber. Calibration coefficients are written once to on-chip EEPROM and persist through power cycles. No external trim components or iterative adjustments are needed for the ZSSC3135BE2T.

What protection features are integrated into the ZSSC3135BE2T?

The ZSSC3135BE2T integrates reverse polarity protection, short-circuit protection on AOUT, and ±33 V absolute maximum rating on all pins - including VDDE, AOUT, and sensor inputs. These protections are implemented internally with no external components required. The ZSSC3135BE2T also includes built-in sensor connection diagnostics (open/short detection) and failsafe output behavior during fault conditions.

Can the ZSSC3135BE2T interface with an external thermistor for temperature compensation?

Yes, the ZSSC3135BE2T supports external thermistor-based temperature compensation via the IRTEMP pin and VTSER input channel. The device provides programmable bias current (6–20 µA) and accepts input voltages up to 600 mV/V on VTSER, enabling direct connection of common NTC thermistors. Compensation coefficients for the thermistor are stored in EEPROM alongside bridge sensor parameters, and the ZSSC3135BE2T applies them automatically during signal conditioning.