Datasheet AD5228 (Analog Devices) - 9

Data Sheet AD5228 120 REF LEVEL /DIV MARKER 469 390.941Hz 0dB 6.0dB MAG (A/R) –8.966dB 6 V T DD = 2.7V A = 25 C 100 0 VDD = 5.5V V ) A = 50mV rms 16 STEPS ( –6 W 80 8 STEPS , R –12 4 STEPS –18 60 TANCE B) d 2 STEPS IS S VDD = 5.5V –24 1 STEP 40 GAIN ( R RE –30 E WIP –36 20 –42 –48 0
04422-0-020
–40 –20 0 20 40 60 80 100 –54
04422-0-050
TEMPERATURE ( C) 1k 10k 100k 1M START 1 000.000Hz STOP 1 000 000.000Hz
Figure 19. Wiper Resistance vs. Temperature Figure 22. Gain vs. Frequency vs. Code, RAB = 10 kΩ
150 REF LEVEL /DIV MARKER 97 525.233Hz 10k 0dB 6.0dB MAG (A/R) –9.089dB C) 50k 6 T 100k A = 25 C 120 0 VDD = 5.5V VDD = 5.5V VA = 50mV rms

T (ppm/ A = OPEN 16 STEPS / –6 WB 90 8 STEPS

R –12 4 STEPS CO, –18 60 B) MP d 2 STEPS –24 TE 1 STEP 30 GAIN ( –30 –36 TAT MODE 0 OS –42 RHE –48 –30
04422-0-021
0 4 8 12 16 20 24 28 32 –54
04422-0-051
CODE (Decimal) 1k 10k 100k 1M START 1 000.000Hz STOP 1 000 000.000Hz
Figure 20. Rheostat Mode Tempco ΔRWB/ΔT vs. Code Figure 23. Gain vs. Frequency vs. Code, RAB = 50 kΩ
20 REF LEVEL /DIV MARKER 51 404.427Hz 10k 0dB 6.0dB MAG (A/R) –9.123dB 6 C) 50k TA = 25 C 15 100k 0 VDD = 5.5V V VA = 50mV rms

T (ppm/ DD = VA = 5.5V 16 STEPS / 10 VB = 0V –6 WB 8 STEPS

V –12 5 CO, 4 STEPS –18 MP 0 B) d TE 2 STEPS –24 –5 1 STEP GAIN ( R MODE –30 TE –10 –36 NTIOME –42 –15 TE O P –48 –20
04422-0-022
0 4 8 12 16 20 24 28 32 –54
04422-0-052
CODE (Decimal) 1k 10k 100k 1M START 1 000.000Hz STOP 1 000 000.000Hz
Figure 21. Potentiometer Mode Tempco ΔVWB/ΔT vs. Code Figure 24. Gain vs. Frequency vs. Code, RAB = 100 kΩ Rev. B | Page 9 of 18 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY ELECTRICAL CHARACTERISTICS INTERFACE TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION PROGRAMMING THE DIGITAL POTENTIOMETERS Rheostat Operation Potentiometer Mode Operation CONTROLLING INPUTS TERMINAL VOLTAGE OPERATION RANGE POWER-UP AND POWER-DOWN SEQUENCES LAYOUT AND POWER SUPPLY BIASING APPLICATIONS MANUAL ADJUSTABLE LED DRIVER ADJUSTABLE CURRENT SOURCE FOR LED DRIVER ADJUSTABLE HIGH POWER LED DRIVER AUTOMATIC LCD PANEL BACKLIGHT CONTROL AUDIO AMPLIFIER WITH VOLUME CONTROL CONSTANT BIAS WITH SUPPLY TO RETAIN RESISTANCE SETTING OUTLINE DIMENSIONS ORDERING GUIDE