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SIRIUS

® 

TECHNICAL REFERENCE MANUAL 



5.14. STG / STG+ 



The STG module is THE universal ampliﬁer perfectly ﬁtting for strain gage and mid-level voltage               

measurements with powerful sensor constant voltage and current excitation. 

5.14.1. STGv2: Speciﬁcations 

Inputs 

Input types 

Voltage 

Full/Half/Quarter bridge strain (120 Ω and 350 Ω) 

Potentiometer, RTD, Resistance 

Current (ext. Shunt) 

ADC Type 

24-bit delta-sigma dual core with anti-aliasing ﬁlter 

Sampling Rate 

Simultaneous 200 kS/sec 

Dual Core Ranges (Low) 

±50 V (±2.5 V) 

±10 V (±500 mV) 

±1 V (±50 mV) 

±100 mV (±5 mV) 

Gain accuracy 

±0.05 % of reading 

Offset accuracy (Dual 

Core) 

±20 (10) mV 

±2 (1) mV 

±0.2 (0.2) mV 

±0.1 (0.1) mV 

Offset Accuracy after 

Balance Ampliﬁer 

±1 mV 

±0.1 mV 

±0.02 mV 

±0.01 mV 

Typ. Dynamic Range @ 

10 kS (Dual Core) 

-137 dB (-147 dB) 

-137 dB (-152 dB) 

-137 dB (-147 dB) 

-135 dB (-137 dB) 

Typ. Noise ﬂoor @ 10kS 

(Dual Core) 

-108 dB (-118 dB) 

-107 dB (-125 dB) 

-107 dB (-113 dB) 

-100 dB (-100 dB) 

Typ. CMR @ DC...50 Hz / 

400 Hz / 1 kHz 

56 / 56 / 56 dB 

88 / 86 / 84 dB 

97 / 96 / 95 dB 

115 / 112 / 102 dB 

Gain Drift Typical 

10 PPM/K, max. 40 PPM/K 

Offset Drift Typical 

0.3 μV/K + 2 ppm of range/K, max 0.8 μV/K + 10 ppm of range/K 

Gain Linearity 

<0.02 % 

Inter Channel 

Phase-mismatch 

0.02° * ﬁn [kHz] + 0.1° (@ 200 kS/sec) 

Channel Crosstalk 

-120 dB @ 10 kHz 

Input Coupling 

DC, AC 1 Hz (3 Hz, 10 Hz per SW) 

Input Impedance 

1 MΩ between IN+ and IN- for 50 V Range; all other Ranges > 1 GΩ 

Max. Common Mode 

Voltage 

Isolated version: ±500 V 

Differential version: 50 V Range: ±60 V; all other Ranges: ±12 V 

Overvoltage Protection 

50 V Range: 300 V; all other Ranges: 50 V (200 V peak for 10 msec) 

Excitation Voltage 

Free programmable (16-bit DAC) 

Predeﬁned levels 

0, 1, 2.5, 5, 10, 15 and 20 VDC 

Accuracy 

±0.05 % ±2 mV 

Drift 

±10 ppm/K ±100 μV/K 

Load stability 

0 % to 100 % load <0.01 % 

Noise @ 10V / 350 Ω 

<150 μVrms @ 10 kS 

Line regulation over 20 Ω 

of change 

<0.005 % @ 120 Ω load 

SIRIUS

V20-1 187 / 336  

Brand	DEWESOFT
Model	SIRIUS Series
Category	Data Loggers
Language	English

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