Datasheet AD8335 (Analog Devices) - 9

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Data Sheet AD8335 25 1k 20 R +85°C, HIGH FB = 2.5kΩ 15 +85°C, LOW ) V 10 ) R m Ω FB = 1kΩ ( ( E 5 GE R LTA FB = 499Ω 0 DANC O E 100 V P T M –5 E –40°C, LOW I –40°C, HIGH T FS U –10 +25°C, HIGH OF INP RFB = 249Ω +25°C, LOW RSH = ∞, CSH = 0pF –15 RSH = 49Ω, CSH = 22pF –20 –25 10
4 7
0 0.5 1.0 1.5 2.0 2.5 3.0
10
1M 10M 1G
01 6- 6-
V
97
GAIN (V)
97 04
FREQUENCY (Hz)
04 Figure 15. Differential Output Offset Voltage vs. VGAIN at Three Temperatures Figure 18. Preamp Input Resistance vs. Frequency for Various Values of RFB
25 –10 50j VIN = 10mV p-p 20 –20 25j 100j 15 –30 ) V 10 m ( –40 B) STOP 5 1GHz GE d K ( –50 LTA L 0 O TA 0Ω 17Ω 50Ω 150Ω V S T –60 –5 S E FS CRO –10 –70 OF START –15 –80 100kHz –20 –90 100MHz –25
5
–100 –25j –75j 0 0.5 1.0 1.5 2.0 2.5 3.0
01 18 6- 0 6-
V
97
GAIN (V)
97 04
–50j
04 Figure 16. Absolute Offset vs. VGAIN at VOHx and VOLx Pins Figure 19. Smith Chart S11 vs. Frequency, 100 kHz to 1 GHz Relative to VCMx Pins
100 250 VIN = 10mV p-p RS = 0Ω VOHx ) RFB = ∞ Hz 200 / ) V Ω n ( VOLx ( E 10 E IS 150 DANC E D NO P E M I RR E HLxx = HIGH 100 UT F P E 1 T R U O UT P T 50 U HLxx = LOW O 0.1 0 100k 1M 10M 1G
6 19 01
0 0.5 1.0 1.5 2.0 2.5 3.0
0 6- 6- 97
FREQUENCY (Hz)
97
VGAIN (V)
04 04 Figure 17. Output Resistance at VOHx and VOLx Pins vs. Frequency Figure 20. Output Referred Noise vs. VGAIN (See Figure 50) Rev. B | Page 9 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