Datasheet AD7780 (Analog Devices) - 10

AD7780 8,388,415 2.0 8,388,410 1.5 1.0 8,388,405 ) 0.5 8,388,400 FS DE pm 0 CO p 8,388,395 ( L IN –0.5 8,388,390 –1.0 8,388,385 –1.5 8,388,380 –2.0
7
0 200 400 600 800 1000
14 0 01
–6 –4 –2 0 2 4 6
5- 5-
SAMPLE
94
V
94 07
IN (V)
07 Figure 14. Noise (VREF = AVDD, Update Rate = 10 Hz, Gain = 1) Figure 17. Integral Nonlinearity (VREF = AVDD, Gain = 1)
100 10 8 6 75 4 E NC V) µ 2 ( RRE 50 ET 0 S F CCU F O O –2 –4 25 –6 –8 0 –10
15 0
8,388,385 8,388,391 8,388,397 8,388,403 8,388,409 8,388,415
18
–60 –40 –20 0 20 40 60 80 100 120
5- 0 5-
CODE
94 94 07
TEMPERATURE (°C)
07 Figure 15. Noise Distribution Histogram Figure 18. Offset vs. Temperature (Gain = 128) (VREF = AVDD, Update Rate = 10 Hz, Gain = 1)
150 3.0 2.5 100 2.0 50 1.5 ) m p ) 1.0 (p R 0 FS 0.5 O R pm R p –50 ( 0 E L IN IN –0.5 GA –100 –1.0 –1.5 –150 –2.0 –200 –2.5
19
–60 –40 –20 0 20 40 60 80 100 120
0 6 5- 01
–0.04 –0.03 –0.02 –0.01 0 0.01 0.02 0.03 0.04
94 5-
TEMPERATURE (°C)
07
V
94
IN (V)
07 Figure 19. Gain Error vs. Temperature (Gain = 128) Figure 16. Integral Nonlinearity (VREF = AVDD, Gain = 128) Rev. A | Page 9 of 16 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS Circuit and Timing Diagrams ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS OUTPUT NOISE AND RESOLUTION THEORY OF OPERATION FILTER, DATA RATE, AND SETTLING TIME GAIN POWER-DOWN/RESET () ANALOG INPUT CHANNEL BIPOLAR CONFIGURATION DATA OUTPUT CODING REFERENCE BRIDGE POWER-DOWN SWITCH DIGITAL INTERFACE APPLICATIONS INFORMATION WEIGH SCALES PERFORMANCE IN A WEIGH SCALE SYSTEM EMI RECOMMENDATIONS GROUNDING AND LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE