AD8400/AD8402/AD8403 - SP-Elektroniikka
AD8400/AD8402/AD8403 - SP-Elektroniikka AD8400/AD8402/AD8403 - SP-Elektroniikka
AD8400/AD8402/AD8403 RHEOSTAT MODE TEMPCO – ppm/C 700 600 500 400 300 200 100 0 V DD = 5V T A = –40C/+85C V A = NO CONNECT R WB MEASURED –100 0 32 64 96 128 160 192 224 256 CODE – Decimal R W (20mV/DIV) CS (5V/DIV) TIME 500ns/DIV GAIN – dB 6 0 –6 –12 –18 –24 –30 –36 CODE = FF –42 –48 T A = +25C 01 SEE TEST CIRCUIT 7 –54 10 100 1k 10k 100k 1M FREQUENCY – Hz 80 40 20 10 08 04 02 TPC 10. ∆R WB /∆T Rheostat Mode Tempco TPC 11. One Position Step Change at Half-Scale (Code 7F H to 80 H ) TPC 12. 10 kΩ Gain vs. Frequency R WB RESISTANCE – % 0.75 0.50 0.25 0 –0.25 –0.50 CODE = 80 H V DD = 5V SS = 158 UNITS AVG + 2 SIGMA AVG – 2 SIGMA AVG OUTPUT INPUT THD + NOISE – % 10 1 0.1 0.01 FILTER = 22kHz V DD = 5V T A = 25C SEE TEST CIRCUIT 5 SEE TEST CIRCUIT 6 –0.75 0 100 200 300 400 500 600 HOURS OF OPERATION AT 150C TPC 13. Long-Term Drift Accelerated by Burn-In TIME 500s/DIV TPC 14. Large Signal Settling Time 0.001 10 100 1k 10k 100k FREQUENCY – Hz TPC 15. 50 kΩ Gain vs. Frequency vs. Code THD + NOISE – % 10 1 0.1 0.01 FILTER = 22kHz V DD = 5V T A = 25C SEE TEST CIRCUIT 5 SEE TEST CIRCUIT 6 0.001 10 100 1k 10k 100k FREQUENCY – Hz TPC 16. Total Harmonic Distortion Plus Noise vs. Frequency V OUT (50mV/DIV) TIME 200ns/DIV TPC 17. Digital Feedthrough vs. Time GAIN – dB 6 0 –6 –12 –18 –24 –30 –36 –42 –48 80 H 40 H 20 H 10 H 08 H 04 H 02 H 01 H CODE = FF H –54 1k 10k 100k 1M FREQUENCY – Hz TPC 18. 100 kΩ Gain vs. Frequency vs. Code –10– REV. C
NORMALIZED GAIN FLATNESS – 0.1dB/DIV SEE TEST CIRCUIT 7 CODE = 80 H V DD = 5V T A = 25C R = 50k R = 100k R = 10k 10 100 1k 10k 100k 1M FREQUENCY – Hz TPC 19. Normalized Gain Flatness vs. Frequency IDD – SUPPLY CURRENT – mA 10 1 0.1 T A = 25C V DD = 3V V DD = 5V 0.01 0 1 2 3 4 5 DIGITAL INPUT VOLTAGE – V TPC 20. Supply Current vs. Digital Input Voltage AD8400/AD8402/AD8403 PSRR – dB 80 60 40 20 V DD = +5V DC 1V p-p AC T A = 25C CODE = 80 H C L = 10pF V A = 4V, V B = 0V SEE TEST CIRCUIT 4 0 100 1k 10k 100k 1M FREQUENCY – Hz TPC 21. Power Supply Rejection vs. Frequency GAIN – dB 12 6 0 –6 –12 –18 –24 f –3dB = 71kHz, R = 100k f –3dB = 700kHz, R = 10k f –3dB = 125kHz, R = 50k –30 V IN = 100mV rms –36 V DD = 5V R L = 1M –42 1k 10k 100k 1M FREQUENCY – Hz TPC 22. –3 dB Bandwidths I DD – SUPPLY CURRENT – µA 1200 A – V DD = 5.5V CODE = 55 H 1000 B – V DD = 3.3V CODE = 55 H 800 C – V DD = 5.5V CODE = FF H 600 D – V DD = 3.3V CODE = FF H 400 200 T A = 25C D 0 1k 10k 100k 1M 10M FREQUENCY – Hz TPC 23. Supply Current vs. Clock Frequency A B C R ON – 160 140 120 100 80 60 40 20 V DD = 2.7V V DD = 5.5V SEE TEST CIRCUIT 3 T A = 25C 0 0 1 2 3 4 5 6 V BIAS – V TPC 24. AD8403 Incremental Wiper ON Resistance vs. V DD 100 1 GAIN – dB PHASE – Degrees 0 –10 –20 0 –45 –90 V DD = 5V T A = 25C WIPER SET AT HALF-SCALE 80 H I A SHUTDOWN CURRENT – nA 10 V DD = 5V IDD – SUPPLY CURRENT – A 0.1 0.01 LOGIC INPUT VOLTAGE = 0, V DD V DD = 5.5V V DD = 3.3V 100k 200k 400k 1M 2M 4M 6M 10M FREQUENCY – Hz TPC 25. 1 kΩ Gain and Phase vs. Frequency 1 –55 –35 –15 5 25 45 65 85 105 125 TEMPERATURE – C TPC 26. Shutdown Current vs. Temperature 0.001 –55 –35 –15 5 25 45 65 85 105 125 TEMPERATURE – C TPC 27. Supply Current vs. Temperature REV. C –11–
- Page 1 and 2: a FEATURES 256-Position Replaces 1,
- Page 3 and 4: REV. C -3- AD8400/AD8402/AD8403 SPE
- Page 5 and 6: AD8400/AD8402/AD8403 SPECIFICATIONS
- Page 7 and 8: AD8400/AD8402/AD8403 Number of Numb
- Page 9: Typical Performance Characteristics
- Page 13 and 14: AD8400/AD8402/AD8403 OPERATION The
- Page 15 and 16: AD8400/AD8402/AD8403 Table II. Inpu
- Page 17 and 18: AD8400/AD8402/AD8403 ACTIVE FILTER
- Page 19 and 20: AD8400/AD8402/AD8403 14-Lead Narrow
<strong>AD8400</strong>/<strong>AD8402</strong>/<strong>AD8403</strong><br />
RHEOSTAT MODE TEMPCO – ppm/C<br />
700<br />
600<br />
500<br />
400<br />
300<br />
200<br />
100<br />
0<br />
V DD = 5V<br />
T A = –40C/+85C<br />
V A = NO CONNECT<br />
R WB MEASURED<br />
–100 0 32 64 96 128 160 192 224 256<br />
CODE – Decimal<br />
R W<br />
(20mV/DIV)<br />
CS<br />
(5V/DIV)<br />
TIME 500ns/DIV<br />
GAIN – dB<br />
6<br />
0<br />
–6<br />
–12<br />
–18<br />
–24<br />
–30<br />
–36<br />
CODE = FF<br />
–42<br />
–48<br />
T A = +25C<br />
01<br />
SEE TEST CIRCUIT 7<br />
–54<br />
10 100 1k 10k 100k 1M<br />
FREQUENCY – Hz<br />
80<br />
40<br />
20<br />
10<br />
08<br />
04<br />
02<br />
TPC 10. ∆R WB /∆T Rheostat Mode<br />
Tempco<br />
TPC 11. One Position Step Change at<br />
Half-Scale (Code 7F H to 80 H )<br />
TPC 12. 10 kΩ Gain vs. Frequency<br />
R WB RESISTANCE – %<br />
0.75<br />
0.50<br />
0.25<br />
0<br />
–0.25<br />
–0.50<br />
CODE = 80 H<br />
V DD = 5V<br />
SS = 158 UNITS<br />
AVG + 2 SIGMA<br />
AVG – 2 SIGMA<br />
AVG<br />
OUTPUT<br />
INPUT<br />
THD + NOISE – %<br />
10<br />
1<br />
0.1<br />
0.01<br />
FILTER = 22kHz<br />
V DD = 5V<br />
T A = 25C<br />
SEE TEST CIRCUIT 5<br />
SEE TEST CIRCUIT 6<br />
–0.75<br />
0 100 200 300 400 500 600<br />
HOURS OF OPERATION AT 150C<br />
TPC 13. Long-Term Drift<br />
Accelerated by Burn-In<br />
TIME 500s/DIV<br />
TPC 14. Large Signal Settling Time<br />
0.001<br />
10 100 1k 10k 100k<br />
FREQUENCY – Hz<br />
TPC 15. 50 kΩ Gain vs. Frequency<br />
vs. Code<br />
THD + NOISE – %<br />
10<br />
1<br />
0.1<br />
0.01<br />
FILTER = 22kHz<br />
V DD = 5V<br />
T A = 25C<br />
SEE TEST CIRCUIT 5<br />
SEE TEST CIRCUIT 6<br />
0.001<br />
10 100 1k 10k 100k<br />
FREQUENCY – Hz<br />
TPC 16. Total Harmonic Distortion<br />
Plus Noise vs. Frequency<br />
V OUT<br />
(50mV/DIV)<br />
TIME 200ns/DIV<br />
TPC 17. Digital Feedthrough vs. Time<br />
GAIN – dB<br />
6<br />
0<br />
–6<br />
–12<br />
–18<br />
–24<br />
–30<br />
–36<br />
–42<br />
–48<br />
80 H<br />
40 H<br />
20 H<br />
10 H<br />
08 H<br />
04 H<br />
02 H<br />
01 H<br />
CODE = FF H<br />
–54<br />
1k 10k 100k<br />
1M<br />
FREQUENCY – Hz<br />
TPC 18. 100 kΩ Gain vs. Frequency<br />
vs. Code<br />
–10–<br />
REV. C
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