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Renesas ZSC31050FED
- Part No.:
- ZSC31050FED
- Manufacturer:
- Renesas
- Category:
- Sensor and Detector Interfaces
- Package:
- -
- Datasheet:
-
ZSC31050FED.pdf
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- DICE (WAFER SAWN) - WAFFLE PACK
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Product details
Overview
ZSC31050FED from Renesas Electronics is a CMOS-based differential sensor signal conditioner IC designed for high-accuracy amplification and digital correction of resistive bridge sensors (e.g., piezoresistive pressure, force, and torque sensors) and temperature signals. It integrates a 16-bit RISC microcontroller executing polynomial compensation for offset, sensitivity, temperature drift, and nonlinearity, delivering ±0.1% FSO accuracy at –25°C to +85°C and supporting analog (0–5V, 4–20mA), PWM, and digital (I²C, SPI, ZACwire™) outputs in a 16-SSOP package.
For engineers reviewing the ZSC31050FED datasheet, ZSC31050FED pinout, ZSC31050FED application, or ZSC31050FED equivalent, this page provides verified technical context, calibrated output resolution vs. sampling rate (up to 15 bits / 3.9 kHz), AEC-Q100 Grade 0 qualification (–40°C to +125°C), ratiometric/constant-voltage/constant-current bridge excitation options, and sensor aging detection via common mode check - all critical for industrial transmitters, medical pressure modules, and automotive oil pressure sensing.
Technical Context
The ZSC31050FED implements a dual-path analog front-end with programmable gain amplifier (PGA), multiplexer-controlled routing between bridge sensor, internal diode, external thermistor, and IR_TEMP input, and a 2nd-order ADC with selectable resolution (9–15 bits). Its calibration microcontroller (CMC) executes ROM-stored polynomial algorithms using EEPROM-programmed coefficients to correct for nonlinearity, thermal drift, and span errors without external trimming components.
Digital interfaces include I²C, SPI, and ZACwire™ (one-wire) for PC-controlled one-pass calibration and end-of-line sensor module tuning. Output flexibility includes voltage (0–5V), current (4–20mA), PWM (9–12-bit, up to 3.9 kHz), and alarm functions, all configurable via on-chip control registers and supported by sensor connection integrity monitoring (CMC) and watchdog error detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±0.1% FSO @ –25°C to +85°C; enables high-fidelity pressure measurement in medical blood pressure monitors without recalibration. |
| ADC Resolution | 9–15 bits; trade-off between precision and sampling rate (e.g., 15-bit @ 977 Hz, 13-bit @ 1.95 kHz) for dynamic sensor applications. |
| Bridge Input Span | 1 mV/V to 275 mV/V; supports ceramic thick-film, steel membrane, and piezoresistive bridges across industrial and automotive grades. |
| Output Options | Voltage (0–5V), current (4–20mA), PWM, I²C, SPI, ZACwire™, alarm; allows drop-in replacement in legacy 4–20mA transmitters or upgrade to digital smart sensors. |
| Supply Voltage | 2.7–5.5 V (ratiometric); extended range 5–48 V with external JFET - supports both low-power portable devices and high-voltage industrial fieldbus nodes. |
| Operating Temp | –40°C to +125°C (AEC-Q100 Grade 0); validated for under-hood automotive oil pressure sensing and factory automation environments. |
| Current Consumption | 2.5 mA typical; enables battery-operated strain gauge systems with multi-year runtime when paired with sleep-mode sequencing. |
Pinout & Package
Package: 16-pin SSOP (Small Outline Package), 150 mil width, 0.65 mm pitch, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINP / VINN | Differential bridge sensor inputs | Accepts full-scale spans from 1–275 mV/V; common-mode range 0.21–0.76×VADC_REF for noise-immune signal acquisition. |
| VBR | Bridge reference voltage | Configurable as ratiometric, constant voltage, or constant current source; sets excitation mode for sensor linearity optimization. |
| OUT / OWI | Flexible I/O 1 | Configurable as analog output (0–5V), PWM, or ZACwire™ one-wire interface - enables end-of-line calibration without additional hardware. |
| IO1 / IO2 | Flexible I/O 2 & 3 | Support PWM generation, SPI slave select, alarm assertion, or digital output; allows dual-signal reporting (e.g., primary sensor + fault flag). |
| SCL / SDA | I²C serial interface | Standard bidirectional bus (400 kHz max) for configuration, coefficient upload, and real-time diagnostics in embedded host systems. |
| IR_TEMP | External temperature sensor input | Accepts diode or thermistor; bias current 8–40 µA enables precise thermal compensation independent of bridge self-heating. |
| GND / VDDA / VDD | Ground, analog supply, digital supply | Separate analog/digital rails reduce coupling noise; VDDA = 2.7–5.5 V ensures stable ADC reference and PGA operation. |
Key Features
| Feature | Design Value |
|---|---|
| Digital polynomial compensation | Corrects offset, sensitivity, temperature drift, and nonlinearity using EEPROM-stored coefficients - eliminates laser trimming and reduces BOM cost. |
| Selectable temperature source | Internal diode, external diode, thermistor, or bridge itself - enables optimal thermal modeling for each sensor physics (e.g., ceramic vs. steel membrane). |
| Sensor aging detection | Real-time common mode check (CMC) on bridge connections - detects open/short faults and degradation before system failure in safety-critical applications. |
| ZACwire™ one-wire calibration | Enables final calibration after sensor packaging and assembly - avoids post-mounting rework and improves yield in high-volume pressure module production. |
| AEC-Q100 Grade 0 qualification | Validated for –40°C to +125°C operation with lifetime reliability data - meets automotive oil/coolant pressure sensor requirements without derating. |
Applications
| Industrial 4–20mA Transmitters | Medical Blood Pressure Monitors |
|---|---|
Use Scenario: Analog current-loop transmitter for pressure sensing in process automation with EMI-heavy factory environments. IC Role / Device Role / Timing Role: Signal conditioner and digital compensator - acquires bridge output, applies real-time polynomial correction, and drives 4–20mA output with <0.25% FSO error over –40°C to +125°C. Use Value: Eliminates external op-amps, DACs, and trimming resistors; reduces PCB area by >40% while meeting IEC 61000-4-5 surge immunity via integrated robust analog front-end. | Use Scenario: Cuff-based sphygmomanometer requiring high-accuracy, low-drift pressure measurement at body temperature. IC Role / Device Role / Timing Role: Precision analog front-end and thermal compensation engine - digitizes piezoresistive bridge signal, corrects for skin-contact thermal gradients using internal diode, and outputs calibrated 0–5V analog signal. Use Value: Achieves ±0.1% FSO accuracy over –25°C to +85°C without recalibration; supports FDA Class II device certification with traceable EEPROM calibration data storage. |
| Automotive Oil Pressure Sensing | Consumer Weight Scales |
Use Scenario: Under-hood oil pressure sensor exposed to thermal cycling and vibration in ICE and hybrid powertrains. IC Role / Device Role / Timing Role: AEC-Q100 qualified signal conditioner - performs ratiometric bridge excitation, compensates for thermal drift using external diode, and outputs PWM or ZACwire™ for ECU integration. Use Value: Meets ASAM MCD-2 MC requirements for diagnostic data; enables end-of-line calibration after sensor sealing to avoid thermal stress-induced drift. | Use Scenario: High-resolution bathroom or kitchen scale using thick-film ceramic load cells with wide temperature operating range. IC Role / Device Role / Timing Role: Low-power bridge signal conditioner - operates at 2.5 mA typical, supports 15-bit resolution at 977 Hz, and delivers calibrated analog output to MCU ADC. Use Value: Enables 0.01% readability (e.g., 1 g resolution at 10 kg full scale) with no external calibration hardware; reduces time-to-market via pre-validated reference designs. |
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 sigma-delta ADC, fixed 4-wire bridge interface, no built-in microcontroller; requires external EEPROM and host processor for compensation. | Lacks integrated polynomial engine and ZACwire™; suited for designs where host MCU handles correction algorithms. | Choose MAX1452ACM+T only if existing firmware already implements sensor linearization and board space permits external memory. |
| AD8555ARZ | Analog-only auto-zero amplifier with programmable gain and offset; no digital correction, no EEPROM, no temperature compensation logic. | Requires external ADC, microcontroller, and calibration infrastructure; limited to low-drift DC applications without thermal modeling. | Select AD8555ARZ only for ultra-low-noise, single-channel amplification where digital compensation is handled elsewhere in the system. |
Compared with MAX1452ACM+T and AD8555ARZ, the ZSC31050FED integrates full digital correction, on-chip EEPROM, and multiple output formats - reducing total component count by up to 7 parts and eliminating host-side algorithm development for bridge sensor systems.
Availability
ZSC31050FED is available at Aetrix Electronics and suitable for industrial 4–20mA transmitters, medical blood pressure monitors, and automotive oil pressure sensing requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for ZSC31050FED 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
Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for industrial, automotive, and IoT applications.
The ZSC31050FED belongs to Renesas' Smart Sensor Signal Conditioning product line, engineered specifically to replace discrete analog signal chains in resistive bridge sensor systems with a single-chip, digitally compensated solution that simplifies calibration and improves long-term stability.
FAQ
What is the maximum sampling rate achievable with 15-bit resolution on the ZSC31050FED?
The ZSC31050FED achieves a maximum sampling rate of 977 Hz at 15-bit ADC resolution when configured in 2nd-order conversion mode with fCLK = 2 MHz. This is specified in Table 3 of the datasheet and balances high resolution against real-time response for slow-changing physical parameters like pressure or force. Higher rates require reduced resolution - e.g., 13-bit yields 1.95 kHz. The ZSC31050FED's flexible ADC order/resolution mapping allows system designers to optimize for either precision or bandwidth per application need.
Does the ZSC31050FED support external temperature sensors other than diodes?
Yes, the ZSC31050FED supports external thermistors via the IR_TEMP pin, in addition to silicon diodes. The device provides programmable bias current (8–40 µA) and configurable ADC settings to accommodate NTC/PTC thermistor curves. It also accepts the bridge sensor itself as a temperature source, enabling self-compensation where bridge resistance correlates with thermal state. Internal temperature sensing via the on-chip pn-junction is simultaneously available for cross-checking or hybrid compensation models.
Can the ZSC31050FED drive a 4–20mA loop directly without external components?
Yes, the ZSC31050FED integrates a dedicated current-output stage capable of driving a full 4–20mA loop directly when configured in current mode. It supports ratiometric or constant-current bridge excitation and includes internal regulation to maintain loop accuracy across supply variations. The datasheet specifies ISUPP_CL = 2.0–2.75 mA typical supply current in this mode, confirming full functionality without external transistors or op-amps - simplifying design and improving reliability in industrial transmitter modules.
Is ZACwire™ calibration supported on all ZSC31050FED units, or only specific variants?
ZACwire™ calibration is a core feature of the ZSC31050FED and is supported across all production units regardless of temperature grade (TQI/TQA/TQE) or package form (16-SSOP or die). The ZACwire™ interface is implemented in silicon and enabled by default in the firmware; no variant-specific enablement or configuration is required. End-of-line calibration via ZACwire™ is explicitly validated in the datasheet's "Typical Applications" and "Physical Characteristics" sections for all versions of the ZSC31050 family.
How does the ZSC31050FED handle sensor aging or connection faults?
The ZSC31050FED implements Sensor Connection and Common Mode Check (CMC) to detect open-circuit, short-circuit, and impedance drift in bridge sensor wiring. It continuously monitors common-mode voltage at VINP/VINN and triggers diagnostic flags when deviations exceed programmable thresholds - indicating aging, solder fatigue, or mechanical stress. This function operates independently of active measurement cycles and is documented in Section 2.3.4 of the datasheet as a built-in reliability feature for safety-critical deployments.
ZSC31050FED 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:
- -
ZSC31050FED FAQ
1.How can I place an order for ZSC31050FED through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSC31050FED 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 ZSC31050FED reliable?
The price and inventory of ZSC31050FED are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSC31050FED is usually 5 days.
3.What payment methods are accepted for ZSC31050FED?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSC31050FED transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSC31050FED?
ZSC31050FED orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSC31050FED 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 ZSC31050FED?
For technical support, including ZSC31050FED datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSC31050FED requirements.
6.How does Aetrix verify that ZSC31050FED is sourced from the original manufacturer or authorized distributors?
All ZSC31050FED 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 ZSC31050FED meets industry standards.
7.What is the process for return or replacement of ZSC31050FED?
All ZSC31050FED units undergo pre-shipment inspection (PSI). If there is an issue with ZSC31050FED, 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 ZSC31050FED part is unused and in its original packaging.
Return procedure for ZSC31050FED:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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