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PDF ZSSC3015 Data sheet ( Hoja de datos )
| Número de pieza | ZSSC3015 | |
| Descripción | Sensor Signal Conditioner | |
| Fabricantes | Zentrum Mikroelektronik Dresden | |
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Data Sheet
Rev. 1.02 / March 2013
ZSSC3015
RBicdLite-Auto™ Sensor Signal Conditioner with Diagnostics
Multi-Market Sensing Platforms
1 page  
ZSSC3015
RBicdLite-Auto™ Sensor Signal Conditioner with Diagnostics
3 Functional Description ..................................................................................................... 22
3.1. General Working Mode .............................................................................................. 22
3.2. Normal Mode Sample Rate........................................................................................ 24
3.3. ZACwire™ Communication Interface ......................................................................... 25
3.3.1. Properties and Parameters................................................................................... 25
3.3.2. Bit Encoding ......................................................................................................... 25
3.3.3. Write Operation from Master to ZSSC3015 .......................................................... 26
3.3.4. ZSSC3015 Read Operations ................................................................................ 26
3.3.5. High Level Protocol............................................................................................... 30
3.4. Command/Data Bytes Encoding ................................................................................ 31
3.5. Calibration Sequence................................................................................................. 32
3.6. EEPROM Bits ............................................................................................................ 34
3.7. Calibration Math......................................................................................................... 37
3.7.1. Correction Coefficients ......................................................................................... 37
3.7.2. Interpretation of Binary Numbers for Correction Coefficients................................ 38
3.8. Reading EEPROM Contents...................................................................................... 41
4 Application Circuit Examples ........................................................................................... 42
4.1. Three-Wire Rail-to-Rail Ratiometric Output................................................................ 42
4.2. Absolute Analog Voltage Output ................................................................................ 43
4.3. Three-Wire Ratiometric Output with Over-Voltage Protection.................................... 44
4.4. Digital Output ............................................................................................................. 44
4.5. Output Resistor/Capacitor Limits ............................................................................... 44
5 EEPROM Restoration...................................................................................................... 45
5.1. Default EEPROM Contents........................................................................................ 45
5.1.1. 1V_Trim/JFET_Trim ............................................................................................. 45
5.2. EEPROM Restoration Procedure............................................................................... 45
6 Pin Configuration and Package ....................................................................................... 47
7 ESD/Latch-Up-Protection ................................................................................................ 48
8 Test.................................................................................................................................. 48
9 Quality and Reliability ...................................................................................................... 48
Data Sheet
March 25, 2013
© 2013 Zentrum Mikroelektronik Dresden AG — Rev. 1.02
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 50
5 Page 
ZSSC3015
RBicdLite-Auto™ Sensor Signal Conditioner with Diagnostics
1.4. Analog Inputs versus Output Resolution
The ZSSC3015 has a fully differential chopper-stabilized pre-amplifier with 4 programmable gain settings. The
output of the pre-amplifier is input to a 14-bit charge-balanced ADC. Span, offset, temperature, and nonlinearity
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 ZSSC3015 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.
The following tables outline the guaranteed minimum resolution for a given bridge sensitivity range.
Table 1.1 ADC Resolution Characteristics for an Analog Gain of 6
Input Span [mV/V]
Min Typ
57.8
80.0
50.6
70.0
43.4
60.0
36.1
50.0
28.9
40.0
21.7
30.0
1) In addition to Tco, Tcg.
Analog Gain 6
Max
Allowed Offset
(+/- % of Span) 1
105.8
92.6
79.4
66.1
38%
53%
73%
101%
52.9 142%
39.7 212%
Minimum Guaranteed
Resolution [Bits]
12.4
12.2
12.0
11.7
11.4
11.4
Table 1.2 ADC Resolution Characteristics for an Analog Gain of 24
Analog Gain 24
Input Span [mV/V]
Min Typ Max
Allowed Offset
(+/- % of Span) 1
Minimum Guaranteed
Resolution [Bits]
18.1 25.0 33.1
17%
12.7
14.5 20.0 26.5
38%
12.4
7.2 10.0 13.2
142%
11.4
3.6 5.0
6.6
351%
10.4
1.8 2.5
3.3
767%
9.4
0.9 1.2
1.6
1670%
8.4
1) In addition to Tco, Tcg.
Important Note: The yellow shadowed fields indicate that for these input spans
with the selected analog gain setting, the quantization noise is higher than 0.1% FSO.
Data Sheet
March 25, 2013
© 2013 Zentrum Mikroelektronik Dresden AG — Rev. 1.02
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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