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Renesas ZSSC3240CI5B
- Part No.:
- ZSSC3240CI5B
- Manufacturer:
- Renesas
- Category:
- Sensor and Detector Interfaces
- Package:
- Die
- Datasheet:
-
ZSSC3240CI5B.pdf
- Description:
- IC SENSOR SIGNAL CONDITIONER
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ZSSC3240CI5B from Renesas is a sensor signal conditioning IC (SSC) for high-accuracy amplification, digitization, and correction of resistive sensor signals-including bridge, half-bridge, Pt100, and external diode sensors-featuring 24-bit ADC resolution, 16-bit DAC output, I²C/SPI/OWI interfaces, and -40°C to +125°C operation. It delivers calibrated digital outputs and absolute/ratiometric voltage or 4–20 mA current-loop analog outputs in industrial pressure, flow, and medical sensing systems.
For engineers reviewing the ZSSC3240CI5B datasheet, ZSSC3240CI5B pinout, ZSSC3240CI5B application, or ZSSC3240CI5B equivalent, this page provides verified technical context, real-world interface configurations, analog output design constraints, sensor supply options (ratiometric/current mode), and validated alternative parts for smart sensor module development.
Technical Context
The ZSSC3240CI5B integrates a programmable-gain amplifier (PGA) with 120 gain steps (1.32–540 V/V), a 24-bit math core executing sensor-specific correction algorithms (offset, sensitivity, temperature drift, nonlinearity), and calibration coefficients stored in reprogrammable NVM. Its analog front-end supports both ratiometric (VDDB = 1.75 V) and current-mode sensor excitation across 0.5 kΩ–60 kΩ sensor impedances.
Digital interfaces include SPI (up to 10 MHz), I²C (Standard/Fast/High-Speed modes), and OWI (up to 100 kbit/s), each supporting full read/write access to measurement registers, diagnostics, and configuration memory. Three operational modes-wake-on-request, continuous/fast-response, and automatic cyclic measurement-enable trade-offs among energy consumption, update rate (up to 2.91 kHz), and self-diagnostic coverage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 12/16/24-bit selectable; determines raw conversion noise floor and dynamic range for sensor signal digitization. |
| DAC Resolution | 13/14/16-bit configurable; sets analog output precision for 0–1 V, 0–5 V, ratiometric, or 4–20 mA outputs. |
| Supply Voltage (VDD) | 2.7–5.5 V; supports direct microcontroller rail integration; extended to 48 V via external JFET/LDOctrl control. |
| Sensor Input Range | ±700 mV differential; accommodates bridge outputs from 1 mV/V to 500 mV/V without external attenuation. |
| Operating Temperature | -40°C to +125°C; qualified for under-hood automotive, industrial process, and medical monitoring environments. |
| Accuracy Error | ≤0.01% FSO (full-scale output); includes correction of sensor nonlinearity, offset, and thermal drift using on-chip math core. |
| Interface Options | I²C, SPI, OWI; enables flexible host connectivity-SPI for high-speed calibration, OWI for single-wire sensor modules, I²C for multi-drop systems. |
Pinout & Package
Package: 4 × 4 mm² 24-QFN with wettable flanks (exposed thermal pad connected to VSS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INP / INN | Differential analog input | Accepts bridge/half-bridge sensor signals; common-mode range 0.5–1.2 V referenced to VDDB. |
| VDDB / VSSB | Sensor supply rails | VDDB = 1.75 V internal ratiometric supply; VSSB = sensor ground reference-separate from IC ground (VSS) for noise isolation. |
| AOUT / OWI1 | Multi-function terminal | Configurable as analog output (0–1 V, 0–5 V, ratiometric, or 4–20 mA) or OWI data line; short-circuit protected to 10–12 mA. |
| MOSI/SDA, SCLK/SCL, MISO, SS | Digital interface pins | Shared SPI/I²C functionality; SCLK/SCL referenced to VDD; internal pull-ups on MOSI/SDA and SS. |
| EOC | End-of-conversion interrupt | Active-low pulse signaling completion of SSC cycle; used for low-latency host synchronization without polling. |
| LDOctrl | External regulator control | Analog output driving external JFET or LDO to extend VDD range up to 48 V; supports programmable target regulation (4.6–5.5 V). |
| TEXT | External temperature sensor drive | Current source (5–500 µA) with built-in 150 Ω series resistor; powers external diodes or RTDs for temperature compensation. |
Key Features
| Feature | Design Value |
|---|---|
| 24-bit sensor-signal-conditioning math core | Executes full polynomial correction (offset, sensitivity, tempco, nonlinearity) using NVM-stored coefficients-no host CPU overhead required. |
| Programmable measurement scheduler | Enables deterministic cyclic sensing with user-defined trade-offs between update rate (0.07–2.91 kHz), power (IAVE ≤ 3.5 µA), and diagnostic coverage. |
| On-chip diagnostics | Detects open/short sensor connections, memory integrity faults, and chip-level anomalies (chipping-check) - critical for ASIL-B–capable systems. |
| Triple analog output modes | Supports absolute voltage (0–1 V / 0–5 V), VDD-ratiometric (2.5–97.5% VDD), and 4–20 mA current loop-all configurable without hardware change. |
| Multi-supply sensor excitation | Simultaneously supports ratiometric bridge supply (VDDB), current-mode excitation (ISUP = 5–500 µA), and TEXT-driven external diodes/RTDs. |
Applications
| Industrial Pressure Sensing | Medical Blood Pressure Monitoring |
|---|---|
Use Scenario: High-reliability pressure transducers in hydraulic control systems requiring long-term stability and thermal compensation over -40°C to +125°C. IC Role / Device Role / Timing Role: Primary signal conditioner performing real-time 24-bit digitization, 16-term polynomial correction, and ratiometric 0–5 V analog output generation. Use Value: Eliminates external compensation circuitry and reduces calibration labor by storing full sensor model in on-chip NVM-enabling <0.01% FSO accuracy across temperature. |
Use Scenario: Portable sphygmomanometers needing ultra-low-power, clinically accurate analog output synchronized to cuff inflation cycles. IC Role / Device Role / Timing Role: Low-power cyclic measurement engine with wake-on-request mode, EOC-triggered host readout, and 4–20 mA loop output for hospital-grade analog interfaces. Use Value: Achieves sub-1 µA average current draw per measurement while maintaining 16-bit corrected output resolution-extending battery life beyond 12 months. |
| Smart HVAC Temperature Sensing | White Goods Flow Measurement |
Use Scenario: Multi-point indoor air temperature monitoring in HVAC controllers using Pt100 sensors with lead-wire compensation. IC Role / Device Role / Timing Role: Dual-role conditioner: supplies Pt100 via TEXT current source and corrects resistance-to-temperature using embedded ITS-90 algorithm. Use Value: Enables direct Pt100 interface without external biasing or linearization-reducing BOM count by 4 components and improving ±0.1°C accuracy at 25°C. |
Use Scenario: Flow meters in washing machines using half-bridge strain gauges measuring water pressure drop across venturi tubes. IC Role / Device Role / Timing Role: Bridge signal conditioner with programmable PGA gain (1.32–540 V/V), auto-zero ADC, and interrupt-driven output for real-time flow rate calculation. Use Value: Supports 1 mV/V minimum bridge output and compensates for PCB thermal gradients via on-chip temperature sensor-ensuring ±0.5% full-scale repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sensor signal conditioning applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDK InvenSense ICM-20948 | 9-axis MEMS IMU with integrated DMP; lacks dedicated resistive sensor front-end, PGA, or analog output drivers. | Targeted at motion sensing-not bridge/Pt100 signal conditioning; no NVM-based sensor correction or 4–20 mA support. | Select only if motion fusion is primary requirement; not a functional substitute for ZSSC3240CI5B's analog sensor interface. |
| Analog Devices AD7798 | 24-bit ΣΔ ADC with PGA and reference; no on-chip math core, NVM, or analog output-requires external MCU for correction and DAC. | Needs full external firmware stack for sensor linearization and output generation; increases design complexity and validation effort. | Choose when system already has robust MCU resources and requires maximum ADC flexibility-not turnkey smart sensor output. |
Compared with the AD7798, the ZSSC3240CI5B integrates correction math, NVM storage, and analog output drivers-reducing host dependency and time-to-market. Unlike the ICM-20948, it provides dedicated resistive sensor excitation, diagnostics, and industrial-grade temperature range-making it uniquely suited for calibrated bridge and RTD applications.
Availability
ZSSC3240CI5B is available at Aetrix Electronics and suitable for industrial pressure transducers, medical blood pressure monitors, HVAC temperature nodes, and white goods flow sensors requiring stable component supply across automotive, medical, and industrial production programs.
Supply support for ZSSC3240CI5B 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT applications-with emphasis on functional safety and reliability.
The ZSSC3240CI5B belongs to Renesas' Smart Sensor Signal Conditioning product line, designed specifically to enable high-accuracy, low-power, self-contained smart sensors for harsh-environment industrial and medical instrumentation.
FAQ
What sensor types does the ZSSC3240CI5B support?
The ZSSC3240CI5B supports resistive bridge and half-bridge sensors, Pt100 RTDs, external temperature diodes, and single-element resistive sensors. It accommodates sensor resistances from 0.5 kΩ to 60 kΩ and bridge sensitivities from 1 mV/V to 500 mV/V. The ZSSC3240CI5B uses its on-chip current source or ratiometric VDDB supply to excite these elements, and applies 24-bit math-based correction for offset, sensitivity, temperature drift, and nonlinearity-making it suitable for high-accuracy industrial and medical sensing.
Does the ZSSC3240CI5B support 4–20 mA current-loop output?
Yes, the ZSSC3240CI5B supports 4–20 mA current-loop output via its AOUT/OWI1 pin configured in current-mode, combined with the FB pin and an external bipolar transistor. The IC drives the loop with programmable compliance and includes diagnostics for open/short detection. The ZSSC3240CI5B's LDOctrl pin further enables high-voltage loop operation (up to 48 V) using an external JFET-meeting industrial 2-wire transmitter requirements without additional driver ICs.
How is calibration handled in the ZSSC3240CI5B?
Calibration coefficients for offset, sensitivity, temperature drift, and nonlinearity are stored in the ZSSC3240CI5B's reprogrammable nonvolatile memory (NVM) and applied in real time by its 24-bit math core. Calibration is performed externally using Renesas-provided software tools and standard test equipment, then written via I²C, SPI, or OWI. The ZSSC3240CI5B retains full calibration data across power cycles and supports field updates-eliminating the need for host-based correction algorithms.
What are the power consumption characteristics of the ZSSC3240CI5B?
The ZSSC3240CI5B achieves ultra-low power operation: idle current is as low as 1.5 µA (typical), and average current per 1 Hz measurement cycle is ≤3.5 µA with 16-bit digital output. In active mode, it draws 2.3–2.8 mA. Power states are managed via wake-on-request, continuous, and cyclic modes-allowing precise optimization of energy use versus update rate. The ZSSC3240CI5B also supports external high-voltage supply regulation via LDOctrl, extending operational range without increasing quiescent draw.
Can the ZSSC3240CI5B operate with a 3.3 V microcontroller interface?
Yes, the ZSSC3240CI5B is fully compatible with 3.3 V microcontrollers: its digital I/O pins (MOSI/SDA, SCLK/SCL, MISO, SS, EOC) are VDD-referenced and tolerate 0–5.5 V supply, with internal pull-ups to VDD. All interface protocols-I²C (Standard/Fast/High-Speed), SPI (up to 10 MHz), and OWI (up to 100 kbit/s)-function reliably at 3.3 V logic levels. The ZSSC3240CI5B's VDD range (2.7–5.5 V) ensures seamless integration into mixed-voltage systems without level shifters.
ZSSC3240CI5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- Die
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Resistive
- Input Type:
- Analog
- Output Type:
- 1-Wire®, I2C, SPI
- Current - Supply:
- 2.8 mA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
ZSSC3240CI5B FAQ
1.How can I place an order for ZSSC3240CI5B through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSSC3240CI5B 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 ZSSC3240CI5B reliable?
The price and inventory of ZSSC3240CI5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSSC3240CI5B is usually 5 days.
3.What payment methods are accepted for ZSSC3240CI5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSSC3240CI5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSSC3240CI5B?
ZSSC3240CI5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSSC3240CI5B 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 ZSSC3240CI5B?
For technical support, including ZSSC3240CI5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSSC3240CI5B requirements.
6.How does Aetrix verify that ZSSC3240CI5B is sourced from the original manufacturer or authorized distributors?
All ZSSC3240CI5B 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 ZSSC3240CI5B meets industry standards.
7.What is the process for return or replacement of ZSSC3240CI5B?
All ZSSC3240CI5B units undergo pre-shipment inspection (PSI). If there is an issue with ZSSC3240CI5B, 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 ZSSC3240CI5B part is unused and in its original packaging.
Return procedure for ZSSC3240CI5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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