ZSSC3224 Datasheet, PDF (1/51 Pages) Integrated Device Technology – High End 24-Bit Sensor Signal Conditioner IC

High End 24-Bit Sensor Signal
Conditioner IC
ZSSC3224
Datasheet
Brief Description
The ZSSC3224 is a sensor signal conditioner (SSC) IC
for high-accuracy amplification and analog-to-digital con-
version of a differential or pseudo-differential input
signal. Designed for high-resolution sensor module
applications, the ZSSC3224 can perform offset, span,
and 1^st and 2^nd order temperature compensation of the
measured signal. Developed for correction of resistive
bridge or absolute voltage sensors, it can also provide a
corrected temperature output measured with an internal
sensor.
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.
Features
 Flexible, programmable analog front-end design; up
to 24-bit analog-to-digital converter (ADC)
 Fully programmable gain amplifier for optimizing
sensor signals: gain range 6.6 to 216 (linear)
 Internal auto-compensated 18-bit temperature sensor
 Digital compensation of individual sensor offset; 1^st
and 2^nd order digital compensation of sensor gain as
well as 1^st and 2^nd order temperature gain and offset
drift
 Programmable interrupt operation
 High-speed sensing: e.g., 18-bit conditioned sensor
signal measurement rate >200s^-1
 Typical sensor elements can achieve an accuracy of
better than ±0.10% FSO* at -40 to 85°C
Benefits
 Integrated 26-bit calibration math digital signal
processor (DSP)
 Fully corrected signal at digital output
 Layout customized for die-die bonding with sensor for
high-density chip-on-board assembly
 One-pass calibration minimizes calibration costs
 No external trimming, filter, or buffering components
required
 Highly integrated CMOS design
 Integrated reprogrammable non-volatile memory
 Excellent for low-voltage and low-power battery
applications
 Optimized for operation in calibrated resistive
(e.g., pressure) sensor or calibrated absolute voltage
(e.g., thermopile) sensor modules
Physical Characteristics
 Supply voltage range: 1.68V to 3.6V
 Operating mode current: ~1.0mA (typical)
 Sleep Mode current: 20nA (typical)
 Temperature resolution: <0.7mK/LSB
 Excellent energy-efficiency:
with 18-bit resolution: <100pJ/step
with 24-bit resolution: <150nJ/step
 Operation temperature: –40°C to +85°C
 Small die size
 Delivery options: die for wafer bonding
* FSO = Full Scale Output.
ZSSC3224 Application Example
VSS
RES
EOC
MISO
VDD
Stacked-Die Sensor Module
VDD
ZSSC3224
VSS
VDDB
INP(+)
SS
RES
VDDB
INN
EOC
MISO
sensor element
INN(-)
VSSB
INP
VSSB
MOSI
SDA
SCLK
SCL
VSS
VDD
Battery
SS
MOSI
SDA
SCLK
SCL
Microcontroller
© 2016 Integrated Device Technology, Inc
1
October 24, 2016