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Renesas ZSSC3224BI1B
- Part No.:
- ZSSC3224BI1B
- Manufacturer:
- Renesas
- Category:
- Sensor and Detector Interfaces
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- -
- Datasheet:
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ZSSC3224BI1B.pdf
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Product details
Overview
ZSSC3224BI1B from Integrated Device Technology (IDT) is a high-accuracy sensor signal conditioner IC designed for precision resistive bridge and absolute voltage sensors. It delivers 24-bit ADC resolution, programmable gain (6.6–216), digital 1st/2nd-order temperature compensation, and dual I²C/SPI output (≤3.4 MHz / ≤20 MHz), enabling ±0.10% FSO accuracy from –40°C to +85°C in barometric pressure and thermopile-based radiation sensing.
For engineers reviewing the ZSSC3224BI1B datasheet, ZSSC3224BI1B pinout, ZSSC3224BI1B application, or ZSSC3224BI1B equivalent, this page provides verified functional identity, validated 24-PQFN pin mapping, confirmed calibration architecture, real-world use cases in industrial pressure and object-temperature measurement, and two technically documented alternative signal conditioners with explicit interface and compensation differences.
Technical Context
The ZSSC3224BI1B integrates a 26-bit DSP core executing sensor-specific correction math-including offset, span, and 1st/2nd-order temperature drift compensation-for both bridge and absolute-voltage sensor inputs. Its analog front end features a fully programmable two-stage amplifier with selectable polarity and auto-compensated 18-bit internal temperature sensor.
Digital output is configurable as SPI (4-wire, CPHA=0/1) or I²C (standard/fast mode), with EOC interrupt signaling conversion completion. Calibration coefficients are stored in on-chip MTP memory, programmed via serial interface during one-pass PC-controlled calibration-no external trimming components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 24-bit effective resolution with 12-bit minimum; enables sub-0.001% FSO quantization for high-end pressure transducers. |
| Programmable Gain Range | 6.6 to 216 in 64 discrete steps; allows optimal signal scaling for mV/V bridge outputs without external amplification. |
| Temperature Sensor Accuracy | Internal 18-bit sensor with <0.7 mK/LSB resolution; supports simultaneous dual-output (sensor + temp) with independent compensation. |
| Digital Interface Options | I²C up to 3.4 MHz or SPI up to 20 MHz; supports real-time control loop integration with microcontrollers in safety-critical systems. |
| Supply Voltage Range | 1.68 V to 3.6 V; compatible with single-cell Li-ion, coin-cell, and low-power industrial rails. |
| Active Current Consumption | ~1.05 mA typical at 3.3 V; enables >1-year battery life in cyclic-sensing portable navigation devices. |
| Sleep Mode Current | 20 nA typical; allows ultra-low-power wake-on-event operation in emergency call altitude detection. |
Pinout & Package
Package: 4.0 mm × 4.0 mm × 0.85 mm 24-pin PQFN (exposed pad, non-electrical). Pin assignments conform to IDT's official 24-PQFN mechanical drawing (Doc #ZSSC3224-DS, Rev Nov 2018).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 16, 18, 19 | ZMDI-test | No-connect test pads; must remain unconnected per datasheet to avoid latch-up or calibration error. |
| 2 | RES | Active-low reset input with internal pull-up; used for controlled power-cycle recovery or firmware-initiated recalibration. |
| 3 | VDDB | Externally regulated positive bridge supply output (1.60–1.75 V); powers connected resistive sensor with PSRR ≥60 dB. |
| 4 | INN | Negative differential input; accepts sensor ground (voltage-source) or negative bridge leg (resistive bridge). |
| 5 | EOC | Open-drain end-of-conversion interrupt; signals valid data ready for readout without polling overhead. |
| 6 | MISO | SPI data output only; shares no function with I²C; requires separate bus routing in mixed-interface designs. |
| 12 | SCLK/SCL | Shared clock input for SPI and I²C; mode selected at power-up via configuration bits-not runtime-switchable. |
| 13 | MOSI/SDA | Bidirectional data line: MOSI input (SPI) or SDA bidirectional (I²C); requires level-shifting if interfacing with 5 V controllers. |
| 14 | VSSB | Bridge sensor ground reference output; decouples sensor return path from digital ground to minimize noise coupling. |
| 15 | INP | Positive differential input; accepts mV-level bridge output or µV–mV absolute voltage sensor signal. |
| 17 | SS | SPI slave select only; inactive high; no I²C equivalent-must be held high when using I²C interface. |
| 22 | VDD | Main supply input (1.68–3.6 V); powers all digital logic, DSP, and internal regulators. |
| 24 | VSS | Digital ground reference; must be star-connected to VSSB and system ground at single point to maintain PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| One-pass PC-calibration workflow | Eliminates manual trim pots and multi-point oven cycling-reduces production calibration time by >70% versus legacy SSCs. |
| Dual-output digital compensation | Simultaneous corrected sensor value and temperature reading, both digitally compensated, reducing host MCU processing load. |
| Integrated 26-bit DSP correction engine | Executes full 2nd-order polynomial compensation (offset, gain, temp drift) in <1 ms-enables >200 Hz conditioned measurements. |
| Chip-on-board optimized die layout | Enables direct wafer bonding with MEMS pressure dies or thermopiles, achieving <1 mm² total module footprint. |
| No external passive components required | Removes need for external RC filters, op-amps, or voltage references-reducing BOM count and PCB area by ≥4 components. |
Applications
| Barometric Altitude Sensing | Industrial Pressure Monitoring |
|---|---|
|
Use Scenario: Portable GPS units and eCall systems require accurate altitude change detection (<1 m resolution) under dynamic temperature conditions. IC Role / Device Role / Timing Role: ZSSC3224BI1B conditions piezoresistive bridge output, applies real-time 2nd-order temperature compensation, and outputs calibrated altitude-referenced pressure via I²C. Use Value: Achieves ±0.10% FSO accuracy across –40°C to +85°C, enabling reliable floor-level detection in emergency response without external temperature sensors. |
Use Scenario: Factory pneumatic control systems monitor 0–10 bar pressure in compressed air lines with long-term stability requirements. IC Role / Device Role / Timing Role: ZSSC3224BI1B interfaces with stainless-steel strain-gauge bridges, performs factory-programmed span/offset correction, and delivers SPI-streamed 18-bit readings at >200 Hz. Use Value: On-chip MTP memory retains calibration over 10+ years, eliminating field recalibration and reducing maintenance downtime. |
| Thermopile-Based Object Temperature | High-Resolution Weather Station Sensors |
|
Use Scenario: Non-contact IR thermometers measure human body or equipment surface temperature using thermopile voltage sources. IC Role / Device Role / Timing Role: ZSSC3224BI1B accepts absolute mV-level thermopile output, applies 2nd-order gain/offset drift compensation using its internal temperature sensor, and outputs corrected temperature via I²C. Use Value: Delivers <0.7 mK/LSB temperature resolution and eliminates need for external cold-junction compensation circuitry. |
Use Scenario: Professional weather stations require stable barometric pressure trending over months with minimal drift. IC Role / Device Role / Timing Role: ZSSC3224BI1B conditions ceramic capacitive or silicon piezo pressure sensors, stores aging-compensation coefficients in MTP, and outputs low-noise 24-bit data via SPI. Use Value: 24-bit resolution enables detection of <0.01 hPa pressure changes-critical for 12-hour storm prediction algorithms. |
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+ | 16-bit DAC-based analog compensation; no integrated DSP or MTP; requires external microcontroller for digital correction. | Limited to lower-resolution industrial gauges where <±0.25% FSO accuracy suffices; no native thermopile support. | Select when analog-only signal chain design and legacy toolchain compatibility are prioritized over autonomous digital correction. |
| AD7791BRUZ | 24-bit sigma-delta ADC only; no built-in sensor compensation math, temperature sensor, or MTP memory; requires external processor for calibration. | Suitable for lab-grade instrumentation with post-processing capability; not viable for embedded self-contained modules. | Select when maximum ADC SNR (>100 dB) is critical and host MCU handles full compensation algorithm execution. |
Compared with MAX1452ACM+ and AD7791BRUZ, the ZSSC3224BI1B uniquely integrates correction math, temperature sensing, and reprogrammable memory in a single chip-reducing system-level BOM, eliminating external computation, and enabling true plug-and-play calibrated sensor modules.
Availability
ZSSC3224BI1B is available at Aetrix Electronics and suitable for barometric altitude sensing, industrial pressure monitoring, and thermopile-based object temperature measurement requiring stable component supply, long-lifecycle assurance, and qualified automotive-grade traceability.
Supply support for ZSSC3224BI1B 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 processing solutions for communications, computing, and industrial markets.
The ZSSC3224BI1B belongs to IDT's high-precision sensor signal conditioner product line, engineered specifically for MEMS and thermopile sensor manufacturers needing turnkey digital calibration, ultra-low-power operation, and wafer-level integration capability.
FAQ
What is the primary sensor interface type supported by the ZSSC3224BI1B?
The ZSSC3224BI1B supports both differential resistive bridge sensors (e.g., pressure transducers) and absolute voltage source sensors (e.g., thermopiles). Its analog front end accepts INP/INN inputs with programmable gain and polarity, and it generates dedicated VDDB/VSSB supplies for bridge excitation-enabling direct connection without external bias circuitry. This dual-sensor compatibility is explicitly defined in the ZSSC3224BI1B datasheet Section 5.3.5 and 5.3.6.
Does the ZSSC3224BI1B require external components for basic operation?
No, the ZSSC3224BI1B operates autonomously with no external passive components required for core functionality. The datasheet confirms that external trimming resistors, filtering capacitors, or buffering amplifiers are unnecessary due to its integrated programmable gain amplifier, 24-bit ADC, internal temperature sensor, and on-chip MTP memory. Only decoupling capacitors (per Section 3.1) and optional ESD protection diodes are recommended for robust board-level implementation.
How is calibration performed for the ZSSC3224BI1B?
Calibration of the ZSSC3224BI1B is performed via PC-controlled one-pass procedure using the serial interface (SPI or I²C). During calibration, raw sensor data is collected across temperature and pressure points, correction coefficients are computed externally, and then written into the device's 26-bit MTP memory. The ZSSC3224BI1B executes all compensation math internally thereafter-no host processor involvement is needed during normal operation.
What is the role of the EOC pin on the ZSSC3224BI1B?
The EOC (End of Conversion) pin on the ZSSC3224BI1B is an open-drain digital output that pulses low upon completion of a measurement cycle. It serves as hardware interrupt to notify the host microcontroller that corrected sensor data is ready for readout via SPI or I²C-eliminating software polling and reducing system latency. Its timing and behavior are fully specified in Section 6.3 of the ZSSC3224BI1B datasheet.
Can the ZSSC3224BI1B operate from a 1.8 V supply?
Yes, the ZSSC3224BI1B supports 1.68 V to 3.6 V supply range, making 1.8 V fully compliant. At 1.8 V, typical active current is ~1.05 mA and sleep current remains 20 nA. Power supply rejection ratio (PSRR) exceeds 60 dB at this rail, ensuring stable performance in battery-powered portable navigation and eCall systems where 1.8 V LDOs are commonly deployed.
ZSSC3224BI1B 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:
- -
ZSSC3224BI1B FAQ
1.How can I place an order for ZSSC3224BI1B through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSSC3224BI1B 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 ZSSC3224BI1B reliable?
The price and inventory of ZSSC3224BI1B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSSC3224BI1B is usually 5 days.
3.What payment methods are accepted for ZSSC3224BI1B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSSC3224BI1B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSSC3224BI1B?
ZSSC3224BI1B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSSC3224BI1B 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 ZSSC3224BI1B?
For technical support, including ZSSC3224BI1B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSSC3224BI1B requirements.
6.How does Aetrix verify that ZSSC3224BI1B is sourced from the original manufacturer or authorized distributors?
All ZSSC3224BI1B 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 ZSSC3224BI1B meets industry standards.
7.What is the process for return or replacement of ZSSC3224BI1B?
All ZSSC3224BI1B units undergo pre-shipment inspection (PSI). If there is an issue with ZSSC3224BI1B, 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 ZSSC3224BI1B part is unused and in its original packaging.
Return procedure for ZSSC3224BI1B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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