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Renesas ZSSC3018BA1B
- Part No.:
- ZSSC3018BA1B
- Manufacturer:
- Renesas
- Category:
- Sensor and Detector Interfaces
- Package:
- Die
- Datasheet:
-
ZSSC3018BA1B.pdf
- Description:
- WAFER (UNSAWN) - BOX
- Quantity:
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Product details
Overview
ZSSC3018BA1B from Renesas Electronics is a high-accuracy sensor signal conditioner IC designed for resistive bridge and absolute voltage sensors, featuring 18-bit ADC resolution, programmable gain (6.6–216), digital 1st/2nd-order temperature compensation, and I²C/SPI digital output up to 3.4 MHz / 10 MHz. It delivers ±0.10% FSO accuracy from –40°C to +125°C and supports low-power operation with 50 nA sleep current, targeting pressure, altitude, and thermopile-based sensing modules.
For engineers reviewing the ZSSC3018BA1B datasheet, ZSSC3018BA1B pinout, ZSSC3018BA1B application, or ZSSC3018BA1B equivalent, key selection criteria include its on-chip 26-bit DSP for full sensor correction, integrated MTP memory for one-pass calibration, 24-PQFN (4 × 4 mm) package compatibility, and support for calibrated bridge or thermopile sensors in safety-critical industrial and automotive systems.
Technical Context
The ZSSC3018BA1B implements a dual-stage programmable gain amplifier (PGA) followed by an 18-bit successive-approximation ADC, with internal auto-compensated temperature sensing and dedicated VDDB regulator for bridge excitation. Its digital signal processor executes correction math using stored coefficients for offset, span, and 1st/2nd-order temperature drift of both sensor and temperature channels.
Signal flow is managed by a System Control Unit that sequences external sensor, internal temperature, and offset measurements via multiplexer control. The device operates in Normal Mode (cyclic measurement/sleep) or Command Mode (host-initiated), with EOC interrupt signaling completion and configurable SPI/I²C timing (CPHA=0/1, up to 10 MHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 18-bit max; enables <0.003 K/LSB temperature resolution and sub-0.1% FSO system accuracy. |
| Programmable Gain Range | 6.6 to 216 (64 steps); allows direct interface to mV-level bridge outputs without external amplification. |
| Digital Output Interface | I²C ≤3.4 MHz or SPI ≤10 MHz; supports real-time host polling or interrupt-driven data acquisition. |
| Supply Voltage Range | 1.68 V to 3.6 V; compatible with single-cell Li-ion, coin-cell, and low-voltage industrial rails. |
| Sleep Current | 50 nA @ ≤125°C; enables multi-year battery life in portable barometric or weather monitoring devices. |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive and industrial process environments. |
| Calibration Memory | On-chip MTP memory (1000–10,000 cycles, 10-year retention @125°C); eliminates external EEPROM and simplifies production calibration. |
Pinout & Package
The ZSSC3018BA1B is supplied in a 24-pin PQFN package (4 mm × 4 mm, 0.5 mm pitch) with wettable flanks, optimized for die-die bonding in chip-on-board sensor modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Digital supply input | 1.68–3.6 V core power; powers digital logic, interface, and MTP memory. |
| VSS | Digital ground | Reference for digital I/O and internal regulators; must be connected to system GND. |
| INP / INN | Differential analog inputs | Accepts bridge or voltage-source sensor signals; input range 0.65–1.05 V referenced to VSS. |
| VDDB | Bridge excitation supply | Internally regulated 1.68 V output; supplies bias current to resistive bridges (1–50 kΩ typical). |
| VSSB | Analog ground | Separate analog return path; improves PSRR and noise immunity for precision measurements. |
| SCLK/SCL | Clock input (SPI/I²C) | Configurable as SPI clock (≤10 MHz) or I²C SCL (≤3.4 MHz); synchronous interface timing control. |
| MISO / SDA | Data output (SPI) / bidirectional (I²C) | Serial data line; supports read-only SPI or bidirectional I²C communication. |
| MOSI / SDA | Data input (SPI) / bidirectional (I²C) | Serial command/data input in SPI mode; shared SDA in I²C mode. |
| SS | SPI slave select | Active-low chip enable for SPI; pulled high internally; must be controlled externally in multi-device systems. |
| EOC | End-of-conversion interrupt | Open-drain output signaling completion of corrected measurement; configurable threshold and polarity. |
| RES | Reset input | Low-active hardware reset; initiates full internal reset independent of VDD ramp conditions. |
| AGND / CM | Common-mode reference | Provides stable mid-point reference for differential bridge sensing; connects to bridge center tap. |
Key Features
| Feature | Design Value |
|---|---|
| 26-bit DSP-based correction engine | Executes full 1st/2nd-order temperature compensation and non-linearity correction in real time using on-chip coefficients. |
| Integrated bridge excitation regulator (VDDB) | Delivers stable 1.68 V ±4% at up to 1.8 mA; enables direct connection to unregulated bridge sensors without external components. |
| One-pass calibration architecture | Reduces factory calibration time by eliminating iterative trimming; stores all coefficients in MTP after single temperature-point characterization. |
| Ultra-low sleep current (50 nA) | Supports duty-cycled operation in battery-powered altimeters and IoT environmental sensors with >5-year shelf life. |
| Dual-interface flexibility (SPI/I²C) | Allows seamless integration into legacy I²C microcontroller systems or high-speed SPI-based data loggers without redesign. |
Applications
| Barometric Altitude Sensing | Industrial Pressure Monitoring |
|---|---|
Use Scenario: Portable navigation devices and eCall systems requiring precise altitude change detection (<1 m resolution) under varying thermal conditions. IC Role / Device Role / Timing Role: Sensor signal conditioner performing real-time 18-bit bridge amplification, 2nd-order temperature compensation, and digital output formatting. Use Value: Achieves ±0.10% FSO accuracy across –40°C to +125°C, enabling reliable emergency location reporting without external temperature sensors or calibration tables. | Use Scenario: Pneumatic/hydraulic pressure transducers in factory automation where long-term stability and minimal drift are critical. IC Role / Device Role / Timing Role: Front-end signal conditioner correcting bridge non-linearity and thermal zero/sensitivity drift before digitization. Use Value: On-chip MTP storage of calibration coefficients eliminates field recalibration; 50 nA sleep current extends maintenance intervals in unpowered standby states. |
| Thermopile-Based Object Temperature | Automotive Cabin Climate Control |
Use Scenario: Non-contact infrared thermometers measuring surface temperature via thermopile voltage output in medical or HVAC applications. IC Role / Device Role / Timing Role: Absolute voltage sensor conditioner with internal temperature reference, performing offset/gain correction and cold-junction compensation. Use Value: Delivers <0.003 K/LSB temperature resolution and 16-bit corrected thermopile output at >500 samples/s, supporting fast-response thermal imaging. | Use Scenario: In-vehicle barometric pressure sensing for automatic HVAC altitude compensation and cabin pressure regulation. IC Role / Device Role / Timing Role: High-reliability SSC operating in automotive-grade temperature range with robust PSRR against engine-bay EMI. Use Value: Integrated VDDB regulator and 88 dB PSRR at 100 Hz suppress ignition noise; 24-PQFN package supports automated SMT assembly in harsh environments. |
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-based analog compensation; no on-chip temperature sensor; requires external EEPROM for coefficients. | Limited to bridge sensors only; no native thermopile support; lower integration increases BOM count. | Choose when analog trimming is preferred and system already includes external temperature sensing. |
| AD7798BRUZ | 24-bit ΣΔ ADC with PGA; no built-in correction algorithm or MTP memory; requires external MCU for compensation math. | Higher raw resolution but no integrated DSP; demands additional firmware development and calibration infrastructure. | Choose when maximum ADC resolution is prioritized over turnkey calibration and lowest power consumption. |
Compared with MAX1452ACM+T and AD7798BRUZ, the ZSSC3018BA1B provides fully integrated digital correction, on-chip temperature sensing, and MTP storage-reducing system-level complexity, PCB area, and calibration cost while delivering guaranteed ±0.10% FSO accuracy across automotive temperature ranges.
Availability
ZSSC3018BA1B is available at Aetrix Electronics and suitable for barometric altitude sensing, industrial pressure monitoring, and thermopile-based object temperature measurement requiring stable component supply, automotive-grade reliability, and long-term lifecycle support.
Supply support for ZSSC3018BA1B 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, power, and sensor interface solutions for automotive, industrial, and IoT markets.
The ZSSC3018BA1B belongs to Renesas' Sensor Signal Conditioner product line, engineered specifically for high-accuracy, low-power conditioning of resistive bridge and thermopile sensors in safety-critical and battery-operated applications.
FAQ
What is the primary function of the ZSSC3018BA1B in a sensor system?
The ZSSC3018BA1B serves as a complete sensor signal conditioner IC that performs high-precision amplification, 18-bit analog-to-digital conversion, and real-time digital correction-including offset, span, and 1st/2nd-order temperature compensation-for resistive bridge and absolute voltage sensors. It outputs fully corrected digital values via I²C or SPI, eliminating the need for external processing or trimming components in the ZSSC3018BA1B-based design.
Does the ZSSC3018BA1B support both bridge and thermopile sensors?
Yes, the ZSSC3018BA1B supports both resistive bridge sensors (e.g., pressure transducers) and absolute voltage source sensors (e.g., thermopiles). Its flexible analog front end accepts differential or pseudo-differential inputs, and its internal temperature sensor enables cold-junction compensation for thermopile applications. The ZSSC3018BA1B's calibration math is explicitly validated for both sensor types per its datasheet.
What is the role of the VDDB pin on the ZSSC3018BA1B?
The VDDB pin on the ZSSC3018BA1B is an internally regulated 1.68 V output used to excite resistive bridge sensors. It delivers up to 1.8 mA with high PSRR, enabling direct connection to bridge elements without external regulators or current sources. This feature simplifies layout and improves measurement stability, making the ZSSC3018BA1B ideal for compact, high-density sensor modules.
How does the ZSSC3018BA1B achieve ±0.10% FSO accuracy across temperature?
The ZSSC3018BA1B achieves ±0.10% FSO accuracy from –40°C to +125°C through on-chip 26-bit digital signal processing that applies stored calibration coefficients for 1st- and 2nd-order temperature compensation of both sensor offset and sensitivity drift. This correction is executed in real time on every measurement, and the ZSSC3018BA1B's internal temperature sensor provides the reference needed for accurate thermal modeling without external components.
Can the ZSSC3018BA1B operate from a 1.8 V supply?
Yes, the ZSSC3018BA1B operates across a 1.68 V to 3.6 V supply range, including 1.8 V. At 1.8 V, it maintains full functionality-18-bit ADC operation, 26-bit DSP correction, I²C/SPI communication, and 50 nA sleep current-while delivering 88 dB PSRR. This makes the ZSSC3018BA1B suitable for modern low-voltage microcontroller interfaces and energy-efficient portable designs.
ZSSC3018BA1B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- Die
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Type:
- Signal Conditioner
- Input Type:
- Differential
- Output Type:
- I2C, Serial, SPI
- Current - Supply:
- 1.5 mA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
ZSSC3018BA1B FAQ
1.How can I place an order for ZSSC3018BA1B through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSSC3018BA1B 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 ZSSC3018BA1B reliable?
The price and inventory of ZSSC3018BA1B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSSC3018BA1B is usually 5 days.
3.What payment methods are accepted for ZSSC3018BA1B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSSC3018BA1B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSSC3018BA1B?
ZSSC3018BA1B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSSC3018BA1B 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 ZSSC3018BA1B?
For technical support, including ZSSC3018BA1B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSSC3018BA1B requirements.
6.How does Aetrix verify that ZSSC3018BA1B is sourced from the original manufacturer or authorized distributors?
All ZSSC3018BA1B 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 ZSSC3018BA1B meets industry standards.
7.What is the process for return or replacement of ZSSC3018BA1B?
All ZSSC3018BA1B units undergo pre-shipment inspection (PSI). If there is an issue with ZSSC3018BA1B, 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 ZSSC3018BA1B part is unused and in its original packaging.
Return procedure for ZSSC3018BA1B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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