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PDF ZSSC3008 Data sheet ( Hoja de datos )
| Número de pieza | ZSSC3008 | |
| Descripción | Sensor Signal Conditioner | |
| Fabricantes | Zentrum Mikroelektronik Dresden | |
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Data Sheet
Rev. 1.11 / June 2011
ZSSC3008
Sensor Signal Conditioner with Diagnostics
1 page  
ZSSC3008
Sensor Signal Conditioner with Diagnostics
3.2.3. Write Operation from Master to ZSSC3008 .............................................................25
3.2.4. ZSSC3008 Read Operations ...................................................................................25
3.2.5. High Level Protocol..................................................................................................28
3.3. Command/Data Bytes Encoding ...................................................................................29
3.4. Calibration Sequence....................................................................................................30
3.5. EEPROM Bits ...............................................................................................................32
3.6. Calibration Math............................................................................................................35
3.6.1. Correction Coefficients ............................................................................................35
3.6.2. Interpretation of Binary Numbers for Correction Coefficients...................................35
3.7. Reading EEPROM Contents.........................................................................................37
4 Application Circuit Examples ..............................................................................................38
4.1. Three-Wire Rail-to-Rail Ratiometric Output...................................................................38
4.2. Absolute Analog Voltage Output ...................................................................................39
4.3. Three-Wire Ratiometric Output with Over-Voltage Protection.......................................40
4.4. Digital Output ................................................................................................................40
4.5. Output Resistor/Capacitor Limits ..................................................................................40
5 EEPROM Restoration.........................................................................................................41
5.1. Default EEPROM Contents...........................................................................................41
5.1.1. Osc_Trim .................................................................................................................41
5.1.2. 1V_Trim/JFET_Trim ................................................................................................41
5.2. EEPROM Restoration Procedure..................................................................................41
6 Pin Configuration and Package ..........................................................................................43
7 ESD/Latch-Up-Protection ...................................................................................................44
8 Test ....................................................................................................................................44
9 Quality and Reliability .........................................................................................................44
10 Customization.....................................................................................................................44
11 Product Ordering Codes .....................................................................................................44
12 Related Documents ............................................................................................................45
13 Definitions of Acronyms ......................................................................................................45
14 Document Revision History ................................................................................................46
Data Sheet
June 14, 2011
© 2011 Zentrum Mikroelektronik Dresden AG — Rev. 1.11
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
5 of 46
5 Page 
ZSSC3008
Sensor Signal Conditioner with Diagnostics
Table 1.10 Parameters for System Response
Parameter
Symbol Min. Typ. Max. Unit Conditions
Start-Up-Time
tSTA
5
ms
Power-up to output
Update_rate = 1 kHz (1 ms)
Response Time – Analog Output
Response and Transmission Time
for Digital Output
tRESP-A
tRES, DIG
1 2 ms Update_rate = 1 kHz (1 ms)
1.6
ms
Varies with update rate. Value given
at fastest rate.
Sampling Rate
fS 1000
Hz Update_rate = 1 kHz (1 ms)
Overall Linearity Error– Digital
Overall Linearity Error – Analog
ELIND
ELINA
0.025
0.1
0.04
0.25
% Bridge input to output
% Bridge input to output
Overall Ratiometricity Error
Overall Accuracy – Digital
(only IC, without sensor bridge)
REout
ACoutD
0.035
0.1%
0.25%
% ±10%VDD, Not using Bsink feature
-25°C to 85°C
%FSO
-40°C to 125°C
Overall Accuracy – Analog 1)2)
(only IC, without sensor bridge)
ACoutA
0.35% %FSO -25°C to 85°C
0.5% %FSO -40°C to 125°C
1) Not included is the quantization noise of the DAC. The 12-bit DAC has a quantization
noise of ½ LSB = 0.61mV (@ 5V VDD) = 0.0125%.
2) Analog output range 2.5% to 95%
1.4. Analog Input versus Output Resolution
The ZSSC3008 has a fully differential chopper-stabilized pre-amplifier with 4 programmable gain settings. The
output of the pre-amplifier feeds into a 14-bit charge-balanced ADC. Span, offset, and non-linearity correction are
performed in the digital domain. Then the resulting corrected bridge value can be output in analog form through a
12-bit DAC or as a 16-bit serial digital packet. The resolution of the output depends on the input span (bridge
sensitivity) and the analog gain setting programmed. Digital gains can vary from [0,32). Analog gains available are
6, 24, 48, and 96.
Note: At higher analog gain settings, there will be higher output resolution, but the ability of the ZSSC3008 to
handle large offsets decreases. This is expected because the offset is also amplified by the analog gain and can
therefore saturate the ADC input.
Data Sheet
June 14, 2011
© 2011 Zentrum Mikroelektronik Dresden AG — Rev. 1.11
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
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