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Renesas ZSSC3138BA2R
- Part No.:
- ZSSC3138BA2R
- Manufacturer:
- Renesas
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- Specialized
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ZSSC3138BA2R.pdf
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- IC INTFACE SPECIALIZED SGNL COND
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Product details
Overview
ZSSC3138BA2R from Integrated Device Technology (IDT) is a CMOS sensor signal conditioner IC designed for ceramic thick-film and strain gauge bridge sensors. It delivers 16-bit ADC resolution, programmable gain up to 420, dual offset compensation (digital + extended analog), and ratiometric analog voltage output or ZACwire™ digital interface. Used in automotive pressure and industrial force sensing where laser trimming must be avoided.
For engineers reviewing the ZSSC3138BA2R datasheet, ZSSC3138BA2R pinout, ZSSC3138BA2R application, or ZSSC3138BA2R equivalent, key selection criteria include its -40°C to +125°C operating range, 0.5% FSO accuracy over that range, SSOP14 package compatibility, and support for one-pass I²C/ZACwire™ calibration without external trimming components.
Technical Context
The ZSSC3138BA2R integrates a 16-bit RISC microcontroller executing sensor-specific correction algorithms for offset, sensitivity, temperature drift, and non-linearity - all calibrated once and stored in on-chip EEPROM. Its analog front-end includes a three-stage PGA with selectable gains (2.8–420) and extended analog zero compensation (XZC) enabling ±300% VIN_SP offset correction.
Signal flow is fully differential: bridge inputs feed into the PGA, then multiplexed to a switched-capacitor ADC (13–16-bit configurable), followed by digital conditioning and output via either ratiometric analog voltage (12.4-bit effective) or ZACwire™ one-wire interface. Internal temperature sensing uses an on-chip diode with 700–2700 ppm/°C sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - supports stable operation across automotive battery variations without external regulators. |
| Analog Gain Range | 2.8 to 420 - enables full utilization of low-output ceramic sensors (e.g., 1–275 mV/V span) without signal loss or clipping. |
| ADC Resolution | 13–16 bit - higher resolution modes reduce quantization error; 16-bit mode used with range zooming for fine-scale measurements. |
| Output Accuracy | 0.5% FSO @ -40°C to +125°C - guaranteed total error including INL, gain, offset, and thermal effects; no sensor-induced contributions. |
| Sample Rate | 7.8 kHz maximum (2-step ADC mode) - supports dynamic pressure monitoring in fast-cycling industrial valves or brake systems. |
| Operating Temperature | -40°C to +125°C - qualified per AEC-Q100 Grade 1, suitable for under-hood automotive and high-temp industrial enclosures. |
| Protection Features | 33 V absolute max rating, reverse polarity & short-circuit protection - eliminates need for external TVS or series diodes in harsh environments. |
Pinout & Package
Package: RoHS-compliant JEDEC-standard SSOP14 (5.3 mm × 6.2 mm, 0.635 mm pitch), rated for -40°C to +125°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Analog supply input | Provides clean 4.5–5.5 V power to analog front-end; decoupling required (100 nF to VSSE). |
| VSSA | Analog ground reference | Separate analog return path prevents digital noise coupling into sensitive bridge measurement circuitry. |
| SDA | I²C data line | Open-drain bidirectional interface for configuration, calibration, and readout; internal 25–100 kΩ pull-up. |
| SCL | I²C clock line | Supports up to 400 kHz clock; synchronized with internal oscillator (2–4 MHz) for timing-critical operations. |
| n.c. | No-connect | Unbonded pin; must remain unconnected to avoid parasitic coupling or ESD path disruption. |
| VDD | Digital core supply | Internally regulated from VDDE; not user-accessible - ties to internal logic domain only. |
| VDDE | Primary supply input | Main 4.5–5.5 V rail powering digital core, EEPROM, and output buffer; accepts up to 33 V transient. |
| N.C. | No-connect | Unused pin; electrically isolated and should not be routed or soldered. |
| VBR_T | Bridge top input | Differential positive input for resistive bridge; accepts common-mode voltages from 29–65% of VDDA. |
| VBP | Bridge bias positive | Supplies excitation voltage to bridge top node; internally regulated and current-limited for stability. |
| VBR_B | Bridge bottom input | Differential negative input; matched impedance and layout symmetry critical to maintain CMRR > 80 dB. |
| VBN | Bridge bias negative | Reference return for bridge excitation; tied to VSSE in standard configurations. |
| AOUT | Analog output | Ratiometric 0.05–0.95 × VDDE output (12.4-bit effective); slew rate 0.1 V/µs, load ≥2 kΩ. |
| VSSE | System ground | Common return for all supplies and outputs; must be low-impedance and star-connected to minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| One-pass end-of-line calibration | Eliminates manual trimming and reduces test time - all coefficients stored in on-chip EEPROM via I²C or ZACwire™. |
| Dual offset compensation | Combines digital algorithmic correction with extended analog zero compensation (XZC) to handle offsets up to ±300% of sensor span. |
| High-voltage robustness | Withstands 33 V transients on VDDE and AOUT pins - meets ISO 7637-2 pulse 5a requirements without external protection. |
| Temperature-compensated output | On-chip diode sensor and embedded correction algorithm deliver 0.5% FSO accuracy from -40°C to +125°C without external thermistors. |
| Fail-safe diagnostics | Real-time sensor open/short detection (100 kΩ / 50 Ω thresholds) and diagnostic output mode (4–96% range) for functional safety compliance. |
Applications
| Automotive Brake Pressure Sensing | Industrial Hydraulic Load Monitoring |
|---|---|
Use Scenario: Real-time monitoring of hydraulic pressure in ABS/ESC modules under extreme temperature cycling (-40°C cold start to +125°C under-hood). IC Role / Device Role / Timing Role: Primary signal conditioner converting ceramic bridge output to ratiometric analog voltage for ECU ADC sampling at 1–5 kHz. Use Value: 0.5% FSO accuracy maintained across full temperature range eliminates recalibration; AEC-Q100 qualification ensures reliability in safety-critical braking systems. |
Use Scenario: Continuous force feedback in industrial hydraulic cylinders operating in foundries or mining equipment with ambient temperatures up to 125°C. IC Role / Device Role / Timing Role: Front-end conditioner for thick-film ceramic pressure transducers, providing compensated analog output to PLC analog input modules. Use Value: High gain (up to 420) and XZC enable use of low-sensitivity sensors without laser trimming - reducing BOM cost and improving long-term stability vs. trimmed alternatives. |
| Medical Infusion Pump Force Feedback | Heavy-Duty Vehicle Air Suspension Control |
Use Scenario: Precision force measurement during syringe plunger advancement in Class II medical infusion pumps requiring IEC 60601-1 compliance. IC Role / Device Role / Timing Role: Signal conditioner interfacing with strain-gauge-based load cell; outputs ZACwire™ digital data for microcontroller readout with CRC integrity check. Use Value: Built-in sensor connection loss detection (≥100 kΩ threshold) and short-circuit protection prevent false triggers during tube occlusion events. |
Use Scenario: Ride-height control in commercial trucks using ceramic pressure sensors in air spring manifolds exposed to vibration, moisture, and wide thermal swings. IC Role / Device Role / Timing Role: Analog-output signal conditioner driving vehicle body control module (BCM) analog inputs; operates continuously at 125°C ambient. Use Value: Reverse polarity and short-circuit protection eliminate need for external protection diodes - simplifying PCB layout and improving field failure MTBF. |
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 architecture; no integrated microcontroller; requires external EEPROM and separate calibration processor. | Lacks on-chip correction algorithm - demands host MCU for real-time compensation; lower integration increases system complexity. | Choose when legacy MAX1452 tooling exists or when analog-only signal chain with external control is preferred. |
| AD8422ARZ | Instrumentation amplifier only - no ADC, no digital correction, no EEPROM, no temperature sensing. | Requires external ADC, microcontroller, temperature sensor, and calibration firmware - significantly higher design effort and component count. | Choose only for simple gain/offset adjustment where full digital compensation is unnecessary and cost-per-function is prioritized over integration. |
Compared with MAX1452ACM+T and AD8422ARZ, the ZSSC3138BA2R provides complete single-chip signal conditioning - integrating PGA, 16-bit ADC, RISC controller, EEPROM, temperature sensor, and dual-output interface - reducing bill-of-materials, PCB area, and calibration labor while delivering guaranteed 0.5% FSO accuracy over -40°C to +125°C.
Availability
ZSSC3138BA2R is available at Aetrix Electronics and suitable for automotive brake pressure sensing, industrial hydraulic load monitoring, medical infusion pump force feedback, and heavy-duty vehicle air suspension control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ZSSC3138BA2R 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 ICs for automotive, industrial, and communications markets.
The ZSSC313x product line was engineered specifically for high-accuracy resistive bridge sensor conditioning in harsh environments - emphasizing AEC-Q100 qualification, integrated diagnostics, and end-of-line calibration to replace laser-trimmed discrete solutions.
FAQ
What is the maximum operating temperature range supported by the ZSSC3138BA2R?
The ZSSC3138BA2R is specified for continuous operation from -40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements. This version (BA2) does not support the extended +150°C range offered by BE2 variants - confirmed in IDT's ordering information table and electrical characteristics section 1.2.1.
Does the ZSSC3138BA2R support both I²C and ZACwire™ interfaces simultaneously?
No - the ZSSC3138BA2R supports I²C and ZACwire™ as mutually exclusive configuration options. The interface is selected during EEPROM programming; both cannot be active at once. Pin SDA/SCL are repurposed as OWI bidirectional lines when ZACwire™ mode is enabled, per section 1.4.2 of the datasheet.
How many calibration coefficients are stored on-chip for the ZSSC3138BA2R?
The ZSSC3138BA2R stores 16 calibration coefficients in its on-chip EEPROM: 8 for linear and quadratic temperature compensation, 4 for offset/sensitivity correction, and 4 for non-linearity modeling - sufficient to execute the full correction algorithm described in section 2.5.3 of the datasheet.
Can the ZSSC3138BA2R drive a 1 kΩ load on its AOUT pin?
Yes - the ZSSC3138BA2R guarantees ±5 mA output current into a 1 kΩ load (10–90% VDDE range), with output resistance of ≤82 Ω in diagnostic mode. Full-spec operation requires load capacitance ≤150 nF (C3 + CLOAD), as defined in Table 1.3.6.7.
Is the ZSSC3138BA2R pin-compatible with other members of the ZSSC313x family?
Yes - all ZSSC313x variants (including ZSSC3135, ZSSC3136, ZSSC3137, ZSSC3138) share identical SSOP14 pinout and footprint, as confirmed in Figure 4.1 and Table 4.1 of the datasheet. Functional differences (e.g., gain range, resolution, interface options) are configured via EEPROM, not hardware changes.
ZSSC3138BA2R Specifications
- Product attributes
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- Manufacturer:
- Renesas
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ZSSC3138BA2R FAQ
1.How can I place an order for ZSSC3138BA2R through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSSC3138BA2R 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 ZSSC3138BA2R reliable?
The price and inventory of ZSSC3138BA2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSSC3138BA2R is usually 5 days.
3.What payment methods are accepted for ZSSC3138BA2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSSC3138BA2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSSC3138BA2R?
ZSSC3138BA2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSSC3138BA2R 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 ZSSC3138BA2R?
For technical support, including ZSSC3138BA2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSSC3138BA2R requirements.
6.How does Aetrix verify that ZSSC3138BA2R is sourced from the original manufacturer or authorized distributors?
All ZSSC3138BA2R 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 ZSSC3138BA2R meets industry standards.
7.What is the process for return or replacement of ZSSC3138BA2R?
All ZSSC3138BA2R units undergo pre-shipment inspection (PSI). If there is an issue with ZSSC3138BA2R, 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 ZSSC3138BA2R part is unused and in its original packaging.
Return procedure for ZSSC3138BA2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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