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ZSSC4169

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Automotive Resistive Sensor Signal Conditioner, 1.5x Bridge Input, External Diode Temperature Measurment, ASIL C Support

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Features

  • Differential bridge sensor input and on-chip or external temperature sensors, selectable for conditioning of sensor input signal and/or temperature output
  • Extended temperature measurement options (i.e., internal sensor, external diode)
  • SENT interface: OWI or I²C option for calibration
  • Digital compensation of offset, gain, and higher-order nonlinearity, as well as temperature coefficients of measured sensor input signals
  • Operating temperature range: -40°C to 150°C
  • Accuracy: ± 0.50% FSO at -40°C to 125°C
  • NVM memory for configuration data, a user-configurable measurement and conditioning function, and user-selected data
Find Other Products in Sensor Signal Conditioners (SSC/AFE)
ZSSC4169D-14 Diagram

Description

The ZSSC4169D is a high-performance CMOS IC for precise amplification and correction of Wheatstone bridge sensor signals. With digital compensation for offset, drift, and nonlinearity, it delivers excellent accuracy and reliability. Various self-supervision mechanisms allow monitoring for correct functionality during operation. Integrated non-volatile memory (NVM) and digital calibration reduce assembly costs and eliminate external trimming. Focused for automotive use, the ZSSC4169D offers robust protection, excellent EMC, and easy calibration via I²C or OWI interface, making it the most efficient, cost-effective solution for sensor signal processing.

The ZSSC4169D-14 is optimized for SENT output interface and offers measurement of one Wheatstone bridge and additional measurement of one-half bridge branch of the same Wheatstone bridge, and temperature compensation with external P/N junction or internal temperature source. The device also offers bridge input signal amplification up to 200, A/D conversion with 14 bits, and sample rates up to 1.3kHz. Operation in functional safety systems up to ASIL C is supported.

Parameters

Attributes Value
Function Resistive SSC
Automotive Qual. Yes
Supply Voltage (V) 4.5 - 5.5, 4.75 - 5.25
Input Type Single-bridge, Single-Bridge, Temperature Diode
Interface SENT, I2C
Adj. Analog Gain 2.1 - 200
Resolution (bits) 14
Sample Rate Max (KHz) 0.66, 1.3
Temp. Range (°C) -40 to +150°C

Package Options

Pkg. Type Pkg. Dimensions (mm) Lead Count (#) Pitch (mm)
TSSOP 5.0 x 4.4 x 1.0 16 0.65
VFQFPN 4.0 x 4.0 x 0.9 24 0.5
WAFER 0.0 x 0.0 x 0.0 — —

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Modern vehicles are filled with complex sensor systems to achieve optimal performance and lower emissions. IDT's (acquired by Renesas) ZSSC416x and ZSSC417x family of sensor signal conditioner ICs are ideal for use in the engine and exhaust system. Sensing differential pressure at the mass airflow intake using a single IC attached to two sensors lowers power consumption and improves accuracy compared to traditional sensing systems. Manifold pressure and temperature sensing also benefit from using a dual input IC, with higher accuracy measurements resulting in a more optimal fuel mix.

The IDT ZSSC416x and ZSSC417x family of sensor signal conditioners provide a platform for measurement systems with improved accuracy, reliability, and performance with lower power consumption. The family of devices provides highly accurate amplification with integrated compensation, correction, and calibration, while also sharing a common four-millimeter by four-millimeter QFN package and toolset to reduce development and assembly costs. 

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