High End 24-Bit Sensor Signal
Conditioner IC
ZSSC3224
Datasheet
Brief Description
Features
The ZSSC3224 is a sensor signal conditioner (SSC) IC for high-
accuracy amplification and analog-to-digital conversion of a differ-
ential or pseudo-differential input signal. Designed for high resolu-
tion sensor module applications, the ZSSC3224 can perform offset,
span, and 1st and 2nd order temperature compensation of the
measured signal. Developed for correction of resistive bridge or
absolute voltage sensors, it can also provide a corrected tempera-
ture output measured with an internal sensor.
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Flexible, programmable analog front-end design; up to 24-bit
analog-to-digital converter (ADC)
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Fully programmable gain amplifier for optimizing sensor
signals: gain range 6.6 to 216 (linear)
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Internal auto-compensated 18-bit temperature sensor
Digital compensation of individual sensor offset; 1st and 2nd
order digital compensation of sensor gain as well as 1st and
2nd order temperature gain and offset drift
The measured and corrected sensor values are provided at the
digital output pins, which can be configured as I2C (≤3.4MHz) or
SPI (≤20MHz). Digital compensation of signal offset, sensitivity,
temperature, and non-linearity is accomplished via a 26-bit internal
digital signal processor (DSP) running a correction algorithm.
Calibration coefficients are stored on-chip in a highly reliable, non-
volatile, multiple-time programmable (MTP) memory. Programming
the ZSSC3224 is simple via the serial interface. The interface is
used for the PC-controlled calibration procedure, which programs
the set of calibration coefficients in memory. The ZSSC3224
provides accelerated signal processing, increased resolution, and
improved noise immunity in order to support high-speed control,
safety, and real-time sensing applications with the highest
requirements for energy efficiency.
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Programmable interrupt operation
High-speed sensing: e.g., 18-bit conditioned sensor
signal measurement rate >200s-1
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Typical sensor elements can achieve an accuracy of better
than ±0.10% full scale output (FSO) at -40 to 85°C
Integrated 26-bit calibration math digital signal
processor (DSP)
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Fully corrected signal at digital output
Layout customized for die-die bonding with sensor for high-
density chip-on-board assembly
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One-pass calibration minimizes calibration costs
No external trimming, filter, or buffering components required
Highly integrated CMOS design
Applications
Integrated reprogrammable non-volatile memory
Excellent for low-voltage and low-power battery applications
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Barometric altitude measurement for portable navigation or
emergency call systems; altitude measurement for car
navigation
Optimized for operation in calibrated resistive
(e.g., pressure) sensor or calibrated absolute voltage (e.g.,
thermopile) sensor modules
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Weather forecast
Fan control
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Supply voltage range: 1.68V to 3.6V
Operating mode current: ~1.0mA (typical)
Sleep Mode current: 20nA (typical)
Temperature resolution: <0.7mK/LSB
Industrial, pneumatic, and liquid pressure
High-resolution temperature measurements
Object-temperature radiation (via thermopile)
Excellent energy-efficiency:
ZSSC3224 Application Example
with 18-bit resolution: <100pJ/step
with 24-bit resolution: <150nJ/step
VSS
VDD
VDD
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Small die size
Stacked-Die Sensor Module
Operation temperature: –40°C to +85°C
VDD
ZSSC3224
SS
Delivery options: 4.0mm x 4.0mm 24-PQFN and die for wafer
bonding
VSS
VSS
VDDB
INP(+)
SS
MOSI
SDA
RES
RES
INP
sensor element
SCLK
SCL
VDDB
INN
Microcontroller
VSSB
EOC
EOC
MOSI
SDA
INN(-)
VSSB
MISO
MISO
SCLK
SCL
© 2018 Integrated Device Technology, Inc
1
November 12, 2018
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