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Renesas ZSSC3135BA1B
- Part No.:
- ZSSC3135BA1B
- Manufacturer:
- Renesas
- Category:
- Sensor and Detector Interfaces
- Package:
- -
- Datasheet:
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ZSSC3135BA1B.pdf
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Product details
Overview
ZSSC3135BA1B from Integrated Device Technology (IDT) is a CMOS sensor signal conditioner IC designed specifically for piezoresistive bridge sensors in automotive and industrial applications. It provides 13/14-bit ADC resolution, analog gain up to 105, ratiometric analog voltage output (12.4-bit effective), and digital compensation of offset, sensitivity, temperature drift, and non-linearity. It operates from 4.5–5.5 V over −40 to +125°C and supports external temperature sensing via diode or thermistor.
For engineers reviewing the ZSSC3135BA1B datasheet, ZSSC3135BA1B pinout, ZSSC3135BA1B application, or ZSSC3135BA1B equivalent, key selection criteria include its AEC-Q100 qualification, integrated 16-bit RISC microcontroller for on-chip correction, dual-output capability (analog voltage or ZACwire™ One-Wire), high-voltage protection (±33 V), and one-pass end-of-line calibration via I²C™ or ZACwire™ interface.
Technical Context
The ZSSC3135BA1B implements a fully differential analog front-end with programmable gain amplifier (PGA), multiplexer, and full-differential switched-capacitor ADC. Its internal 16-bit RISC microcontroller executes sensor-specific correction algorithms stored in ROM, using calibration coefficients written to on-chip EEPROM during one-pass calibration.
It supports three temperature measurement modes-internal diode, external diode, or external thermistor-with configurable channel gain and bias current. Output is selectable between ratiometric analog voltage (5–95% VDDE, 12-bit DAC) or digital ZACwire™ (One-Wire Interface), both enabled by the same EEPROM-configurable system control logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 13 or 14-bit; determines raw digitization fidelity and noise floor - higher resolution enables finer sensor signal discrimination at lower sample rates |
| Analog Gain Range | Up to 105; sets maximum amplification for low-output piezoresistive bridges without external op-amps |
| Output Options | Ratiometric analog voltage (5–95% VDDE, 12-bit DAC) or ZACwire™ One-Wire digital interface; enables flexible integration into analog or microcontroller-based systems |
| Temperature Range | −40°C to +125°C; qualified for under-hood automotive and harsh industrial environments |
| Supply Voltage | 4.5–5.5 V; compatible with standard 5 V rail systems and tolerant of automotive battery transients |
| Accuracy | 0.5% FSO over −40 to +125°C; includes combined error from INL, gain, offset, and temperature drift - no additional sensor-level compensation required |
| Sample Rate | Up to 200 Hz; sufficient for pressure, force, and level sensing with adequate anti-aliasing margin |
| High-Voltage Protection | ±33 V on all pins; eliminates need for external TVS diodes in 24 V industrial or 12 V automotive supply domains |
Pinout & Package
The ZSSC3135BA1B is packaged in RoHS-compliant JEDEC SSOP14 (Small Outline Package, 14-pin, 150 mil width).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Analog supply input | Provides clean 4.5–5.5 V power to analog front-end; requires local 100 nF decoupling to VSSA |
| VSSA | Analog ground reference | Separate analog ground plane required; must be tied to VSSE only at single point to minimize noise coupling |
| SDA | I²C™ data line | Open-drain bidirectional interface for configuration and calibration; supports up to 400 kHz clock |
| SCL | I²C™ clock line | Input-only clock for I²C™ communication; internal pull-up resistor (25–100 kΩ) reduces external component count |
| VDD | Digital core supply | Internally regulated from VDDE; not externally connected in standard operation |
| VDDE | Main supply input | Primary 4.5–5.5 V supply; powers digital core, EEPROM, and output buffer; supports ±33 V absolute max rating |
| IRTEMP | External temperature sensor bias | Provides 6–20 μA constant current for external diode or thermistor sensing |
| VBR_T / VBR_B | Bridge sensor top/bottom inputs | Differential inputs for piezoresistive bridge; support common-mode range of 29–65% VDDA depending on PGA gain |
| VBP / VBN | Bridge excitation outputs | Programmable voltage sources for active bridge biasing; eliminate need for external precision references |
| AOUT | Analog output | Ratiometric voltage output (5–95% VDDE); capable of sourcing/sinking 2.5 mA into ≥2 kΩ load |
| VSSE | System ground | Power ground return for VDDE and AOUT; must be low-impedance path to avoid output error |
| n.c. | No connect | Pin 5 is unconnected; must remain floating or grounded per layout guidelines to prevent parasitic coupling |
| OUT / OWI | ZACwire™ data I/O | Single-wire digital interface for configuration and readout; shares pin with analog output via EEPROM-selectable mode |
| GND | Ground reference | Same as VSSE; used in evaluation schematics as primary ground tie point |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 16-bit RISC microcontroller | Executes sensor-specific correction algorithm in real time - eliminates need for host MCU intervention during normal operation |
| One-pass end-of-line calibration | Stores full set of offset, sensitivity, temperature, and non-linearity coefficients in on-chip EEPROM - no manual trimming or external memory required |
| Dual output interface selection | Configurable at power-on via EEPROM to deliver either analog voltage or ZACwire™ digital output - enables reuse across analog and digital system architectures |
| Integrated bridge excitation | VBP/VBN pins provide programmable voltage bias for resistive bridges - removes requirement for external precision voltage sources or current drivers |
| Failsafe sensor diagnostics | Real-time detection of open-circuit (>100 kΩ), short-circuit (<50 Ω), and asymmetry faults on bridge inputs - supports ASIL-B functional safety requirements |
| AEC-Q100 Grade 0 qualification | Validated for operation from −40°C to +150°C junction temperature - meets automotive under-hood reliability standards |
Applications
| Automotive Tire Pressure Monitoring | Industrial Hydraulic Pressure Sensing |
|---|---|
Use Scenario: Real-time monitoring of tire pressure in passenger vehicles using piezoresistive silicon pressure sensors mounted inside wheel assemblies. IC Role / Device Role / Timing Role: Signal conditioner performing offset, sensitivity, and temperature compensation on raw bridge output; delivers calibrated analog voltage to TPMS ECU. Use Value: Enables <0.5% FSO accuracy over −40 to +125°C without external compensation components - critical for meeting ISO 21848 safety thresholds. | Use Scenario: Closed-loop pressure feedback in hydraulic control valves for construction equipment operating in ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Front-end conditioner for stainless-steel diaphragm pressure transducers; interfaces to PLC analog input modules via ratiometric voltage output. Use Value: High-voltage protection (±33 V) prevents damage from inductive kickback in solenoid-driven valve circuits - eliminates need for external protection networks. |
| Medical Disposable Blood Pressure Transducer | Heavy-Duty Truck Air Suspension Level Control |
Use Scenario: Single-use blood pressure cuffs incorporating miniaturized piezoresistive sensors requiring factory-calibrated, traceable output. IC Role / Device Role / Timing Role: Final-stage signal conditioner with user-defined EEPROM entries for lot traceability and calibration certificate storage. Use Value: On-chip EEPROM supports >100,000 write cycles at ≤85°C - enables full calibration data retention over product lifetime without external memory. | Use Scenario: Air spring height sensing in commercial trailers where sensors are exposed to road salt, vibration, and wide thermal cycling. IC Role / Device Role / Timing Role: Robust signal conditioner compensating for temperature-induced zero drift in MEMS-based pressure sensors across −40 to +85°C ambient. Use Value: Internal temperature diode and external thermistor support allow hybrid compensation - improves long-term stability beyond what single-sensor methods achieve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sensor signal conditioning applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1452ACM+T | 16-bit DAC, 20-bit ADC, supports Wheatstone bridge only; no built-in microcontroller - requires external host for compensation math | Lacks integrated correction algorithm and EEPROM storage - demands additional firmware development and external memory | Choose when legacy analog design infrastructure exists and custom compensation logic is preferred over turnkey calibration |
| AD8555ARZ | Chopper-stabilized auto-zero amplifier with 16-bit DAC; no ADC or digital interface - purely analog signal path | No digital calibration, no EEPROM, no temperature compensation engine - limited to basic offset/gain trim | Choose for ultra-low-drift DC-coupled amplification where digital correction is handled upstream or omitted entirely |
Compared with MAX1452ACM+T and AD8555ARZ, the ZSSC3135BA1B delivers complete sensor-to-digital/analog signal chain integration - including on-chip correction, EEPROM storage, dual output modes, and failsafe diagnostics - reducing BOM count, layout area, and firmware effort while maintaining AEC-Q100 compliance.
Availability
ZSSC3135BA1B is available at Aetrix Electronics and suitable for automotive tire pressure monitoring, industrial hydraulic pressure sensing, and medical disposable transducer applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-qualified performance.
Supply support for ZSSC3135BA1B 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 developed to deliver highly accurate, programmable, and AEC-Q100-qualified signal conditioning for piezoresistive bridge sensors - targeting cost-sensitive, high-reliability applications where minimal external components and end-of-line calibration efficiency are critical.
FAQ
What is the operating temperature range supported by the ZSSC3135BA1B?
The ZSSC3135BA1B is rated for operation from −40°C to +125°C ambient temperature. This version (BA1B suffix) corresponds to the Advanced-Performance Temperature Range (TQA), validated per AEC-Q100 Grade 1. The device maintains 0.5% FSO accuracy across this full range, with internal circuitry designed to reject thermal drift in both analog and digital domains.
Does the ZSSC3135BA1B support external temperature sensing, and if so, what types?
Yes, the ZSSC3135BA1B supports external temperature sensing via its IRTEMP pin, which provides a programmable 6–20 μA bias current. It is compatible with external pn-junction diodes (for diode-based temperature measurement) and thermistors (via voltage divider configuration). The device includes dedicated channel gain and input range settings for both sensor types in its EEPROM configuration.
How is calibration performed for the ZSSC3135BA1B, and what interface is used?
Calibration for the ZSSC3135BA1B is performed using a one-pass end-of-line procedure that measures sensor output at multiple pressures and temperatures. Calibration coefficients are computed externally and written to on-chip EEPROM via either the I²C™ interface (SDA/SCL pins) or the ZACwire™ One-Wire interface (shared with AOUT pin). No host MCU is required during normal operation after calibration.
Can the ZSSC3135BA1B operate with a 3.3 V supply, or is 5 V mandatory?
No, the ZSSC3135BA1B requires a supply voltage of 4.5–5.5 V and is not specified for 3.3 V operation. Its internal voltage references, PGA architecture, and output driver stages are optimized for 5 V rails. Attempting to operate below 4.5 V may result in undefined behavior, reduced accuracy, or failure to meet AEC-Q100 specifications. A dedicated 5 V LDO or DC-DC converter is recommended for compatibility.
What protection features does the ZSSC3135BA1B include for harsh environments?
The ZSSC3135BA1B includes reverse polarity protection, short-circuit protection on AOUT, and ±33 V absolute maximum rating on all pins - exceeding typical automotive load-dump and jump-start conditions. It also features built-in sensor connection loss and short detection (100 kΩ open, <50 Ω short thresholds), plus diagnostic output modes for fault reporting, supporting functional safety requirements in ASIL-B systems.
ZSSC3135BA1B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- -
- Series:
- *
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
ZSSC3135BA1B FAQ
1.How can I place an order for ZSSC3135BA1B through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSSC3135BA1B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ZSSC3135BA1B reliable?
The price and inventory of ZSSC3135BA1B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSSC3135BA1B is usually 5 days.
3.What payment methods are accepted for ZSSC3135BA1B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSSC3135BA1B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSSC3135BA1B?
ZSSC3135BA1B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSSC3135BA1B order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ZSSC3135BA1B?
For technical support, including ZSSC3135BA1B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSSC3135BA1B requirements.
6.How does Aetrix verify that ZSSC3135BA1B is sourced from the original manufacturer or authorized distributors?
All ZSSC3135BA1B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZSSC3135BA1B meets industry standards.
7.What is the process for return or replacement of ZSSC3135BA1B?
All ZSSC3135BA1B units undergo pre-shipment inspection (PSI). If there is an issue with ZSSC3135BA1B, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ZSSC3135BA1B part is unused and in its original packaging.
Return procedure for ZSSC3135BA1B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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