Datasheet AD8335 (Analog Devices) - 8

link to page 15 link to page 15 link to page 15
AD8335 Data Sheet 25 30 420 CHANNELS (105 UNITS) 0.5V < V 25 GAIN < 2.5V R 20 FB = ∞ 20 R RFB = 249Ω 15 15 S = 50Ω L ) B VIN = 10mV p-p TA d O ( 10 IN %T 10 GA 5 0 5 –5 0
1
–10 7 6 5 4 3 2 1 0 9 8 7 6 5
1 0 6- 8
100k 1M 10M 100M 1G
97
–16. –16. –16. –16. –16. –16. –16. –16. –15. –15. –15. –15. –15.
-00
FREQUENCY (Hz)
04
INTERCEPT (dB)
976 04 Figure 9. Intercept Histogram Figure 12. Preamp Frequency Response for a Terminated and Unterminated 50 Ω Source (See Figure 49)
50 –10 VOUT = 1V p-p –20 40 VGAIN = 3.0V –30 30 VGAIN = 2.5V V –40 GAIN = 2.0V B) ) d B 20 d K ( –50 ( VGAIN = 1.5V VGAIN = 2V IN TAL S 10 –60 GA S VGAIN = 1V V V GAIN = 1.0V GAIN = 1V CRO –70 VGAIN = 3V 0 VGAIN = 0.5V –80 VGAIN = 3V –10 V V GAIN = 0V –90 GAIN = 2V –20 –100
9 2
100k 1M 10M 100M 1G
-00
100k 1M 10M 100M
016-
FREQUENCY (Hz)
976 97 04
FREQUENCY (Hz)
04 Figure 10. Frequency Response for Various Values of VGAIN (See Figure 49) Figure 13. Channel-to-Channel Crosstalk vs. Frequency for Various Values of VGAIN
50 80 VGAIN = 3.0V 40 70 VGAIN = 2.5V VGAIN = 2.0V 60 30 s) V n ( 50 ) GAIN = 1.5V Y B 20 A d L ( E 40 IN VGAIN = 1.0V D 10 P GA OU 30 VGAIN = 0.5V GR 0 20 VGAIN = 0V –10 10 –20 0
0 3
100k 1M 10M 100M 1G 100k 1M 10M 100M
-01 01 6-
FREQUENCY (Hz)
976
FREQUENCY (Hz)
97 04 04 Figure 11. Frequency Response vs. Frequency for Various Values of VGAIN, Figure 14. Group Delay vs. Frequency HLxx = High (See Figure 49) Rev. B | Page 8 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS THEORY OF OPERATION ENABLE SUMMARY PREAMP Noise VGA Optimizing the System Dynamic Range Attenuator Gain Control Output Stage VGA Noise APPLICATIONS INFORMATION ULTRASOUND BASIC CONNECTIONS PREAMP CONNECTIONS INPUT OVERDRIVE Input Overload Protection LOGIC INPUTS COMMON-MODE PINS DRIVING ADCs EVALUATION BOARD BOARD LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE