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Renesas ZSSC3138BA2T
- Part No.:
- ZSSC3138BA2T
- Manufacturer:
- Renesas
- Category:
- Specialized
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ZSSC3138BA2T.pdf
- Description:
- IC INTFACE SPECIALIZED SGNL COND
- Quantity:
- Payment:
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Product details
Overview
ZSSC3138BA2T from Integrated Device Technology (IDT) is a CMOS sensor signal conditioner IC designed for ceramic thick-film and strain gauge bridge sensors in automotive and industrial applications. It provides 16-bit RISC-based digital compensation of offset, sensitivity, temperature drift, and non-linearity; supports analog gain up to 420; delivers ratiometric analog voltage output (12.4-bit resolution) or ZACwire™ digital interface; and operates across -40°C to +125°C.
For engineers reviewing the ZSSC3138BA2T datasheet, ZSSC3138BA2T pinout, ZSSC3138BA2T application, or ZSSC3138BA2T equivalent, key selection considerations include its dual offset compensation (analog XZC + digital), 7.8 kHz max sample rate in 2-step ADC mode, AEC-Q100 qualification, 0.5% FSO accuracy over -40°C to +125°C, and JEDEC-SSOP14 packaging with high-voltage (33 V) and reverse-polarity protection.
Technical Context
The ZSSC3138BA2T integrates a three-stage programmable gain amplifier (PGA), full-differential switched-capacitor ADC (13–16 bit), on-chip temperature diode, and calibration microcontroller (CMC) executing ROM-stored correction algorithms. Its analog front-end supports differential bridge inputs with common-mode range of 29–65% VDDA and programmable gain from 2.8× to 420×.
Digital conditioning uses EEPROM-stored coefficients for real-time compensation of sensor non-idealities. Output is configurable as ratiometric analog voltage (5–95% VDDE, 12-bit DAC) or ZACwire™ one-wire serial interface. Safety features include sensor connection loss detection (>100 kΩ), short-circuit monitoring (0–50 Ω), and failsafe diagnostic modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Enables direct integration with standard 5 V automotive/industrial rails without external regulators. |
| Analog Gain Range | 2.8× to 420× - Matches ceramic thick-film sensor spans (1–275 mV/V) and eliminates need for laser trimming. |
| ADC Resolution | 13–16 bit (with range zooming) - Delivers high-resolution digitization of small bridge signals while supporting noise-immune low-sample-rate modes. |
| Output Options | Ratiometric analog voltage (12-bit DAC, 5–95% VDDE) or ZACwire™ one-wire interface - Supports both legacy analog systems and modern digital sensor networks. |
| Accuracy | 0.5% FSO @ -40°C to +125°C - Guaranteed performance across full industrial temperature range without recalibration. |
| Protection Features | 33 V absolute max rating, reverse polarity protection, short-circuit current limit (±25 mA), and sensor open/short detection - Ensures robust operation in harsh ECU environments. |
| Operating Temperature | -40°C to +125°C - Qualified per AEC-Q100 Grade 1, suitable for under-hood and industrial control module deployment. |
Pinout & Package
Package: JEDEC-compliant SSOP14 (5.0 mm × 6.2 mm, 0.635 mm pitch), RoHS-compliant, rated for -40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDDA) | Analog supply input | Provides dedicated 4.5–5.5 V rail for analog front-end; decoupled via 100 nF capacitor to minimize noise coupling into PGA/ADC. |
| 2 (VSSA) | Analog ground reference | Separate analog return path prevents digital switching noise from corrupting bridge signal measurements. |
| 3 (SDA) | I²C data line | Open-drain bidirectional interface for configuration, calibration, and readout; supports up to 400 kHz clock. |
| 4 (SCL) | I²C clock line | Master-generated clock synchronizing EEPROM programming and sensor data access during end-of-line calibration. |
| 5 (n.c.) | No connect | Internally unused; must be left floating or tied to GND per layout guidelines to avoid parasitic coupling. |
| 6 (VDD) | Digital core supply | Shared with VDDA in most designs; internal regulation ensures stable logic operation independent of analog rail fluctuations. |
| 7 (VDDE) | Output driver supply | Directly powers analog output buffer; enables 5–95% ratiometric output swing referenced to this rail. |
| 8 (VSSE) | Output ground reference | Isolated return for analog output stage; improves load regulation and reduces crosstalk in multi-sensor modules. |
| 9 (VBR_T) | Bridge top input | Differential positive input for resistive bridge; accepts common-mode voltages from 29–65% VDDA depending on PGA gain. |
| 10 (VBP) | Bridge bias positive | Provides regulated excitation voltage to bridge top node; enables constant-current or constant-voltage sensor biasing. |
| 11 (VBR_B) | Bridge bottom input | Differential negative input; paired with VBR_T for true differential measurement rejecting common-mode noise. |
| 12 (VBN) | Bridge bias negative | Reference node for bridge excitation; used with VBP to establish precise bridge bias conditions. |
| 13 (AOUT) | Analog output | Buffered ratiometric voltage output (5–95% VDDE); drives ≥2 kΩ loads with <10 mVpp noise and 0.1 V/µs slew rate. |
| 14 (OUT) | Digital output / ZACwire™ | Open-drain output supporting ZACwire™ one-wire protocol; shares pin with I²C SDA when configured for digital interface. |
Key Features
| Feature | Design Value |
|---|---|
| Dual offset compensation (XZC + digital) | Supports analog zero-shift up to ±388% of signal span plus digital correction - eliminates laser trimming and enables use of untrimmed ceramic sensors. |
| Configurable 2-step ADC mode | Enables 7.8 kHz sampling bandwidth with 13-bit resolution - ideal for dynamic pressure or force sensing where response time >256 µs is required. |
| On-chip temperature diode | Integrated pn-junction sensor with 700–2700 ppm/°C sensitivity - provides real-time die temperature for accurate thermal drift compensation without external components. |
| One-pass end-of-line calibration | Stores all correction coefficients in on-chip EEPROM via I²C or ZACwire™ - reduces manufacturing test time and eliminates manual trim adjustments. |
| AEC-Q100 Grade 1 qualification | Validated for automotive under-hood operation (-40°C to +125°C) with ESD, EMC, and reliability testing - meets functional safety readiness for ASIL-B systems. |
| High-voltage tolerant I/O | Withstands ±33 V transients on VDDE, AOUT, and bridge pins - eliminates need for external TVS diodes in 24 V industrial or 12 V automotive power domains. |
Applications
| Automotive Pressure Sensing | Industrial Load Cell Interface |
|---|---|
|
Use Scenario: Monitoring intake manifold absolute pressure (MAP) in gasoline direct injection engines under transient throttle conditions. IC Role / Device Role / Timing Role: Signal conditioner performing real-time offset/temperature/non-linearity correction on ceramic piezoresistive bridge, outputting ratiometric analog voltage to ECU ADC. Use Value: Achieves 0.5% FSO accuracy across -40°C to +125°C without external trimming, enabling single-part-number MAP sensor across multiple vehicle platforms. |
Use Scenario: High-precision weight measurement in factory-floor pallet scales using thick-film strain gauges. IC Role / Device Role / Timing Role: Front-end conditioner digitizing mV-level bridge outputs, applying digital compensation, and delivering calibrated 12-bit analog output to PLC analog input module. Use Value: Eliminates laser trimming and external op-amps, reducing BOM cost by 30% while maintaining 0.25% FSO accuracy at room temperature. |
| Ceramic Differential Pressure Module | Harsh-Environment Level Transmitter |
|
Use Scenario: HVAC differential pressure monitoring across air filters in commercial buildings with wide ambient temperature swings. IC Role / Device Role / Timing Role: Dual-bridge signal conditioner compensating for thermal hysteresis and long-term drift in alumina-based sensors, communicating via ZACwire™ to building management system. Use Value: Enables 15-year field stability with no recalibration due to EEPROM-stored coefficients and on-chip temperature compensation. |
Use Scenario: Liquid level sensing in oil & gas tank farms exposed to -40°C winter cold and +60°C summer heat. IC Role / Device Role / Timing Role: Robust bridge interface IC providing reverse-polarity protection, 33 V surge tolerance, and ratiometric output immune to supply rail variation. Use Value: Survives battery-reversal events and 48 V jump-start transients without latch-up, ensuring continuous operation in remote telemetry nodes. |
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, 20-bit ADC, but no integrated microcontroller or EEPROM; requires external MCU for compensation algorithm execution. | Lacks on-chip correction firmware and one-pass calibration - demands custom software development and additional PCB area for host processor. | Select when full algorithm flexibility is required and system already includes a capable host MCU with available GPIO and memory. |
| AD8422ARZ | Instrumentation amplifier only (no ADC, no digital processing, no EEPROM); fixed gain options up to 1000×. | Provides only analog amplification and filtering - cannot perform temperature compensation, non-linearity correction, or digital output generation. | Select for simple gain-setting applications where sensor linearity and thermal stability are inherently high and no digital interface is needed. |
Compared with MAX1452ACM+T and AD8422ARZ, the ZSSC3138BA2T integrates complete signal chain functionality - from PGA and ADC to microcontroller-based correction and ratiometric/ZACwire™ output - reducing total component count, eliminating firmware development, and guaranteeing calibrated accuracy out-of-box.
Availability
ZSSC3138BA2T is available at Aetrix Electronics and suitable for automotive pressure sensing, industrial load cell interfacing, ceramic differential pressure modules, and harsh-environment level transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ZSSC3138BA2T 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 conditioning solutions for automotive, industrial, and communications markets.
The ZSSC313x product line was engineered specifically for high-accuracy resistive bridge sensor conditioning in AEC-Q100-qualified automotive and extended-temperature industrial environments, emphasizing integrated calibration, robust protection, and minimal external component count.
FAQ
What is the maximum operating temperature range supported by the ZSSC3138BA2T?
The ZSSC3138BA2T is specified for operation from -40°C to +125°C and is qualified to AEC-Q100 Grade 1 standards. This version (BA2) uses the Advanced-Performance Temperature Range (TQA), distinct from the extended -40°C to +150°C variant (BE2). The device maintains 0.5% FSO accuracy across this full range without recalibration.
Does the ZSSC3138BA2T require external components for basic operation?
The ZSSC3138BA2T requires only three external decoupling capacitors (100 nF on VDDA, 100 nF on VDD, and 47 nF on VDDE) and optional RC filter components for EMI suppression. No external trimming resistors, op-amps, or temperature sensors are needed - all compensation is handled internally using on-chip EEPROM coefficients and the integrated temperature diode.
How is calibration performed for the ZSSC3138BA2T?
Calibration is performed via one-pass end-of-line procedure using either the I²C or ZACwire™ interface. During calibration, known pressure/force inputs are applied while the ZSSC3138BA2T's internal microcontroller calculates and stores offset, sensitivity, temperature coefficient, and non-linearity coefficients directly into on-chip EEPROM - no host MCU or external computation is required.
Can the ZSSC3138BA2T drive a 1 kΩ load on its analog output?
Yes, the ZSSC3138BA2T analog output (AOUT) can source/sink up to 5 mA at 10–90% VDDE with a 1 kΩ load, maintaining specified linearity and noise performance. Output voltage range is 0.1–0.90 × VDDE under this condition, with 82 Ω output resistance in diagnostic mode and 0.1 V/µs slew rate to ensure stability with typical capacitive loads ≤150 nF.
What safety and diagnostic features does the ZSSC3138BA2T provide?
The ZSSC3138BA2T includes sensor open-circuit detection (>100 kΩ threshold), sensor short-circuit detection (0–50 Ω), internal voltage monitoring, failsafe diagnostic output modes, and automatic bridge auto-zero measurement. These features enable ISO 26262-compliant system design by providing continuous health monitoring of the sensor interface path without external supervision.
ZSSC3138BA2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Sensor Signal Conditioner - Resistive
- Interface:
- I2C, ZACwire™ One-Wire Interface
- Voltage - Supply:
- 4.5V ~ 5.5V
- Supplier Device Package:
- 14-SSOP
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
ZSSC3138BA2T FAQ
1.How can I place an order for ZSSC3138BA2T through Aetrix?
Please submit a Request for Quotation (RFQ) for ZSSC3138BA2T 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 ZSSC3138BA2T reliable?
The price and inventory of ZSSC3138BA2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZSSC3138BA2T is usually 5 days.
3.What payment methods are accepted for ZSSC3138BA2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZSSC3138BA2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZSSC3138BA2T?
ZSSC3138BA2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZSSC3138BA2T 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 ZSSC3138BA2T?
For technical support, including ZSSC3138BA2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZSSC3138BA2T requirements.
6.How does Aetrix verify that ZSSC3138BA2T is sourced from the original manufacturer or authorized distributors?
All ZSSC3138BA2T 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 ZSSC3138BA2T meets industry standards.
7.What is the process for return or replacement of ZSSC3138BA2T?
All ZSSC3138BA2T units undergo pre-shipment inspection (PSI). If there is an issue with ZSSC3138BA2T, 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 ZSSC3138BA2T part is unused and in its original packaging.
Return procedure for ZSSC3138BA2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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