link to page 15 Data SheetAD8335251k20R+85°C, HIGHFB = 2.5kΩ15+85°C, LOW) V10)RmΩFB = 1kΩ(( E5GERLTAFB = 499Ω0DANCOE 100VPTM–5E–40°C, LOWI–40°C, HIGHTFSU–10+25°C, HIGHOFINPRFB = 249Ω+25°C, LOWRSH = ∞, CSH = 0pF–15RSH = 49Ω, CSH = 22pF–20–2510 4 7 00.51.01.52.02.53.0 10 1M10M1G 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 25–1050jVIN = 10mV p-p20–2025j100j15–30) V10m (–40B)STOP51GHzGEd K (–50LTAL0OTA0Ω17Ω50Ω150ΩVST–60–5SE FSCRO–10–70OFSTART–15–80100kHz–20–90100MHz–25 5 –100–25j–75j00.51.01.52.02.53.0 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 100250VIN = 10mV p-pRS = 0ΩVOHx)RFB = ∞Hz 200/)VΩn(VOLx(E10E IS 150DANC ED NOPEM IRR EHLxx = HIGH100UTFPE1TRU OUT P T50UHLxx = LOWO0.10100k1M10M1G 6 19 01 00.51.01.52.02.53.0 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