Automotive Sensor Signal Conditioner
with LIN and PWM Interface
© 2016 Integrated Device Technology, Inc.
Brief Description
The ZSSC3170 is a CMOS integrated circuit for highly
accurate amplification and sensor specific correction
of bridge sensor signals. Featuring a maximum analog
gain of 420, as well as extended offset compensation
capabilities, the ZSSC3170 is adjustable to nearly all
resistive bridge sensor types.
Digital compensation of offset, sensitivity, temperature
drift, and nonlinearity is accomplished via a 16-bit
RISC microcontroller. Conditioning coefficients are
stored in an EEPROM certified for automotive appli-
cations.
Measured values are provided by one of the digital
LIN or PWM interfaces. Each interface can support
end-of-line calibration using the sensor output. Noise
sensitivity is greatly reduced because the calibration
equipment and the ZSSC3170 are mated digitally.
For quick and easy evaluation and support for
calibrating prototypes, IDT offers the ZSSC3170 SSC
Evaluation Kit, which includes evaluation hardware,
SSOP20 samples, and software.
Features
Complies with LIN specifications 1.3 / 2.0 / 2.1
Configurable LIN publisher frame content
Data conversion rate of up to 430Hz fully utilizes
the maximum LIN channel capacity of 20kbit/s
PWM high-side and low-side switches, support for
LIN communication for end-of-line calibration
Digital compensation of offset, gain, temperature
effects up to 2
nd
order, and nonlinearity up to 3
rd
order. Compensation of temperature sensor offset,
gain, and nonlinearity up to 2
nd
order.
Internal or external temperature reference
Media temperature sensing by diode or RTD
Load dump protection of the LIN pin up to ±40V
Accuracy ±0.25% FSO @ -20 to 85°C
±0.50% FSO @ -40 to 125°C
±1.00% FSO @ -40 to 150°C
3 EEPROM words available for optional user data
Benefits
Measurement and temperature signal available via
one output pin
Compatible with nearly all resistive bridge inputs
No external trimming components required
Single-pass calibration minimizes calibration costs
End-of-line calibration using sensor output
Optimized for automotive environments with
special protection circuitry, excellent electro-
magnetic compatibility, and numerous diagnostic
features; AEC-Q100-qualified
Available Support
Evaluation Kit
Application Notes
Calculation Tools
Physical Characteristics
Supply voltage: 7 to 18 V
Current consumption in Sleep Mode: ≤ 100μA
Input span: 1.8 to 267 mV/V
ADC resolution: 13 to 14 bit
Output resolution: up to 12-bit (LIN and PWM)
Operating temperature range: -40 to 125°C
Extended operating temperature range: ≤150°C
RoHS-compliant delivery form options:
SSOP20, DFN20, or die
ZSSC3170 Basic Circuit