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기능 High End 24-Bit Sensor Signal Conditioner IC
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ZSSC3224 데이터시트, 핀배열, 회로
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 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 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; 1st
and 2nd order digital compensation of sensor gain as
well as 1st and 2nd 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
VSS
RES
ZSSC3224
VDDB
INP(+)
SS
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




ZSSC3224 pdf, 반도체, 판매, 대치품
ZSSC3224 Datasheet
3.7.3. Calibration Step 3a) Coefficient Calculations ..................................................................................................................41
3.7.4. Calibration Step 3b) Post-Calibration Offset Correction ..................................................................................................41
3.7.5. SSC Measurements ...........................................................................................................................................................41
3.8. The Calibration Math .........................................................................................................................................................................42
3.8.1. Bridge Signal Compensation ..............................................................................................................................................42
3.8.2. Temperature Signal Compensation....................................................................................................................................44
3.8.3. Measurement Output Data Format.....................................................................................................................................45
4 Package Information and Pad Assignments...............................................................................................................................................46
5 Quality and Reliability .................................................................................................................................................................................49
6 Ordering Sales Codes ................................................................................................................................................................................49
7 Related Documents ....................................................................................................................................................................................50
8 Glossary .....................................................................................................................................................................................................50
9 Document Revision History ........................................................................................................................................................................51
Table of Figures
Figure 2.1
Figure 2.2
Figure 2.3
Figure 3.1
Figure 3.2
Figure 3.3
Figure 3.4
Figure 3.5
Figure 3.6
Figure 3.7
Figure 3.8
Figure 3.9
ZSSC3224 Functional Block Diagram with Resistive-Bridge Sensor .............................................................................................10
ZSSC3224 Functional Block Diagram with Voltage-Source Sensor...............................................................................................11
ADC Gain and Offset Setup ...........................................................................................................................................................16
Interrupt Functionality .....................................................................................................................................................................20
Operational Flow Chart: Power Up.................................................................................................................................................22
Operational Flow Chart: Command Mode and Normal Mode (Sleep and Cyclic) ..........................................................................23
SPI Configuration CPHA=0 ............................................................................................................................................................28
SPI Configuration CPHA=1 ............................................................................................................................................................28
SPI Command Request..................................................................................................................................................................29
SPI Read Status .............................................................................................................................................................................29
SPI Read Data................................................................................................................................................................................29
I2C Command Request...................................................................................................................................................................30
Figure 3.10 I2C Read Status..............................................................................................................................................................................30
Figure 3.11 I2C Read Data ................................................................................................................................................................................30
Figure 4.1 ZSSC3224 Pad Placement.............................................................................................................................................................46
Figure 4.2 General PQFN24 Package Dimensions .........................................................................................................................................48
© 2016 Integrated Device Technology, Inc
4
October 24, 2016

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ZSSC3224 전자부품, 판매, 대치품
Table 1.3 Requirements for VDD Power-on Reset
PARAMETER
Power-Down Time (duration of VDD Low Level)
VDD Low Level
VDD Rising Slope
ZSSC3224 Datasheet
SYMBOL
tSPIKE
VDDlow
SRVDD
MIN TYP MAX UNIT
3 - - µs
0 - 0.2 V
10 -
- V/ms
1.3. Electrical Parameters
All parameter values are valid only under the specified operating conditions. All voltages are referenced to Vss.
Table 1.4 Electrical Parameters
Note: See important table notes at the end of the table.
Parameter
Supply
External Sensor Supply Voltage,
ADC Reference Voltage
Symbol
VDDB
Current Consumption
IVDD
Power Supply Rejection
20·log10(VDD/VDDB)
(see section 1.4)
PSRVDD
Analog-to-Digital Converter (ADC, A2D)
Resolution
rADC
ADC Clock Frequency
fADC
Conversion Rate
fS,raw
Amplifier
Gain
Gamp
Gain Error
Gerr
Sensor Signal Conditioning Performance
ZSSC3224 Accuracy Error 1)
ErrA,IC
Conversion Rate
fS, SSC
Conditions/Comments
Internally generated
Active State, average
Sleep Mode, idle current,
85°C
VDD = 1.8V
VDD = 2V
Internal ADC clock
Conversions per second for single
24-bit external sensor A2D
conversion (without auto-zero
measurement AZ)
Conversions per second for single
16-bit temperature sensor A2D
conversion (without AZ)
64 steps
Referenced to nominal gain
Accuracy error for sensor that is
ideally linear (in temperature and
measurand)
Conversion per second for fully
corrected 24-bit measurement
Min
1.60
17
32
12
0.9
6.6
-2.5
Typ
1.68
1050
20
60
65
1
-
58
Max Unit
1.75
1500
250
88
91
V
µA
nA
dB
dB
24 Bit
1.1 MHz
144 Hz
2.3 kHz
216
2.5 %
0.01 %FSO
60 Hz
© 2016 Integrated Device Technology, Inc
7
October 24, 2016

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ZSSC3224

High End 24-Bit Sensor Signal Conditioner IC

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